MAYBE
Time: 0.157552
TRS:
 {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
               mark tt() -> active tt(),
    mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                mark s X -> active s mark X,
       mark plus(X1, X2) -> active plus(mark X1, mark X2),
    mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
    mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
          mark x(X1, X2) -> active x(mark X1, mark X2),
                mark 0() -> active 0(),
    U12(X1, X2, mark X3) -> U12(X1, X2, X3),
  U12(X1, X2, active X3) -> U12(X1, X2, X3),
    U12(X1, mark X2, X3) -> U12(X1, X2, X3),
  U12(X1, active X2, X3) -> U12(X1, X2, X3),
    U12(mark X1, X2, X3) -> U12(X1, X2, X3),
  U12(active X1, X2, X3) -> U12(X1, X2, X3),
  active U12(tt(), M, N) -> mark s plus(N, M),
  active U11(tt(), M, N) -> mark U12(tt(), M, N),
     active plus(N, s M) -> mark U11(tt(), M, N),
     active plus(N, 0()) -> mark N,
  active U22(tt(), M, N) -> mark plus(x(N, M), N),
  active U21(tt(), M, N) -> mark U22(tt(), M, N),
        active x(N, s M) -> mark U21(tt(), M, N),
        active x(N, 0()) -> mark 0(),
    U11(X1, X2, mark X3) -> U11(X1, X2, X3),
  U11(X1, X2, active X3) -> U11(X1, X2, X3),
    U11(X1, mark X2, X3) -> U11(X1, X2, X3),
  U11(X1, active X2, X3) -> U11(X1, X2, X3),
    U11(mark X1, X2, X3) -> U11(X1, X2, X3),
  U11(active X1, X2, X3) -> U11(X1, X2, X3),
                s mark X -> s X,
              s active X -> s X,
       plus(X1, mark X2) -> plus(X1, X2),
     plus(X1, active X2) -> plus(X1, X2),
       plus(mark X1, X2) -> plus(X1, X2),
     plus(active X1, X2) -> plus(X1, X2),
    U22(X1, X2, mark X3) -> U22(X1, X2, X3),
  U22(X1, X2, active X3) -> U22(X1, X2, X3),
    U22(X1, mark X2, X3) -> U22(X1, X2, X3),
  U22(X1, active X2, X3) -> U22(X1, X2, X3),
    U22(mark X1, X2, X3) -> U22(X1, X2, X3),
  U22(active X1, X2, X3) -> U22(X1, X2, X3),
    U21(X1, X2, mark X3) -> U21(X1, X2, X3),
  U21(X1, X2, active X3) -> U21(X1, X2, X3),
    U21(X1, mark X2, X3) -> U21(X1, X2, X3),
  U21(X1, active X2, X3) -> U21(X1, X2, X3),
    U21(mark X1, X2, X3) -> U21(X1, X2, X3),
  U21(active X1, X2, X3) -> U21(X1, X2, X3),
          x(X1, mark X2) -> x(X1, X2),
        x(X1, active X2) -> x(X1, X2),
          x(mark X1, X2) -> x(X1, X2),
        x(active X1, X2) -> x(X1, X2)}
 DP:
  DP:
   {  mark# U12(X1, X2, X3) -> mark# X1,
      mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3),
      mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3),
                 mark# tt() -> active# tt(),
      mark# U11(X1, X2, X3) -> mark# X1,
      mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3),
      mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3),
                  mark# s X -> mark# X,
                  mark# s X -> active# s mark X,
                  mark# s X -> s# mark X,
         mark# plus(X1, X2) -> mark# X1,
         mark# plus(X1, X2) -> mark# X2,
         mark# plus(X1, X2) -> active# plus(mark X1, mark X2),
         mark# plus(X1, X2) -> plus#(mark X1, mark X2),
      mark# U22(X1, X2, X3) -> mark# X1,
      mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3),
      mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3),
      mark# U21(X1, X2, X3) -> mark# X1,
      mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3),
      mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3),
            mark# x(X1, X2) -> mark# X1,
            mark# x(X1, X2) -> mark# X2,
            mark# x(X1, X2) -> active# x(mark X1, mark X2),
            mark# x(X1, X2) -> x#(mark X1, mark X2),
                  mark# 0() -> active# 0(),
      U12#(X1, X2, mark X3) -> U12#(X1, X2, X3),
    U12#(X1, X2, active X3) -> U12#(X1, X2, X3),
      U12#(X1, mark X2, X3) -> U12#(X1, X2, X3),
    U12#(X1, active X2, X3) -> U12#(X1, X2, X3),
      U12#(mark X1, X2, X3) -> U12#(X1, X2, X3),
    U12#(active X1, X2, X3) -> U12#(X1, X2, X3),
    active# U12(tt(), M, N) -> mark# s plus(N, M),
    active# U12(tt(), M, N) -> s# plus(N, M),
    active# U12(tt(), M, N) -> plus#(N, M),
    active# U11(tt(), M, N) -> mark# U12(tt(), M, N),
    active# U11(tt(), M, N) -> U12#(tt(), M, N),
       active# plus(N, s M) -> mark# U11(tt(), M, N),
       active# plus(N, s M) -> U11#(tt(), M, N),
       active# plus(N, 0()) -> mark# N,
    active# U22(tt(), M, N) -> mark# plus(x(N, M), N),
    active# U22(tt(), M, N) -> plus#(x(N, M), N),
    active# U22(tt(), M, N) -> x#(N, M),
    active# U21(tt(), M, N) -> mark# U22(tt(), M, N),
    active# U21(tt(), M, N) -> U22#(tt(), M, N),
          active# x(N, s M) -> mark# U21(tt(), M, N),
          active# x(N, s M) -> U21#(tt(), M, N),
          active# x(N, 0()) -> mark# 0(),
      U11#(X1, X2, mark X3) -> U11#(X1, X2, X3),
    U11#(X1, X2, active X3) -> U11#(X1, X2, X3),
      U11#(X1, mark X2, X3) -> U11#(X1, X2, X3),
    U11#(X1, active X2, X3) -> U11#(X1, X2, X3),
      U11#(mark X1, X2, X3) -> U11#(X1, X2, X3),
    U11#(active X1, X2, X3) -> U11#(X1, X2, X3),
                  s# mark X -> s# X,
                s# active X -> s# X,
         plus#(X1, mark X2) -> plus#(X1, X2),
       plus#(X1, active X2) -> plus#(X1, X2),
         plus#(mark X1, X2) -> plus#(X1, X2),
       plus#(active X1, X2) -> plus#(X1, X2),
      U22#(X1, X2, mark X3) -> U22#(X1, X2, X3),
    U22#(X1, X2, active X3) -> U22#(X1, X2, X3),
      U22#(X1, mark X2, X3) -> U22#(X1, X2, X3),
    U22#(X1, active X2, X3) -> U22#(X1, X2, X3),
      U22#(mark X1, X2, X3) -> U22#(X1, X2, X3),
    U22#(active X1, X2, X3) -> U22#(X1, X2, X3),
      U21#(X1, X2, mark X3) -> U21#(X1, X2, X3),
    U21#(X1, X2, active X3) -> U21#(X1, X2, X3),
      U21#(X1, mark X2, X3) -> U21#(X1, X2, X3),
    U21#(X1, active X2, X3) -> U21#(X1, X2, X3),
      U21#(mark X1, X2, X3) -> U21#(X1, X2, X3),
    U21#(active X1, X2, X3) -> U21#(X1, X2, X3),
            x#(X1, mark X2) -> x#(X1, X2),
          x#(X1, active X2) -> x#(X1, X2),
            x#(mark X1, X2) -> x#(X1, X2),
          x#(active X1, X2) -> x#(X1, X2)}
  TRS:
  {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
                mark tt() -> active tt(),
     mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                 mark s X -> active s mark X,
        mark plus(X1, X2) -> active plus(mark X1, mark X2),
     mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
     mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
           mark x(X1, X2) -> active x(mark X1, mark X2),
                 mark 0() -> active 0(),
     U12(X1, X2, mark X3) -> U12(X1, X2, X3),
   U12(X1, X2, active X3) -> U12(X1, X2, X3),
     U12(X1, mark X2, X3) -> U12(X1, X2, X3),
   U12(X1, active X2, X3) -> U12(X1, X2, X3),
     U12(mark X1, X2, X3) -> U12(X1, X2, X3),
   U12(active X1, X2, X3) -> U12(X1, X2, X3),
   active U12(tt(), M, N) -> mark s plus(N, M),
   active U11(tt(), M, N) -> mark U12(tt(), M, N),
      active plus(N, s M) -> mark U11(tt(), M, N),
      active plus(N, 0()) -> mark N,
   active U22(tt(), M, N) -> mark plus(x(N, M), N),
   active U21(tt(), M, N) -> mark U22(tt(), M, N),
         active x(N, s M) -> mark U21(tt(), M, N),
         active x(N, 0()) -> mark 0(),
     U11(X1, X2, mark X3) -> U11(X1, X2, X3),
   U11(X1, X2, active X3) -> U11(X1, X2, X3),
     U11(X1, mark X2, X3) -> U11(X1, X2, X3),
   U11(X1, active X2, X3) -> U11(X1, X2, X3),
     U11(mark X1, X2, X3) -> U11(X1, X2, X3),
   U11(active X1, X2, X3) -> U11(X1, X2, X3),
                 s mark X -> s X,
               s active X -> s X,
        plus(X1, mark X2) -> plus(X1, X2),
      plus(X1, active X2) -> plus(X1, X2),
        plus(mark X1, X2) -> plus(X1, X2),
      plus(active X1, X2) -> plus(X1, X2),
     U22(X1, X2, mark X3) -> U22(X1, X2, X3),
   U22(X1, X2, active X3) -> U22(X1, X2, X3),
     U22(X1, mark X2, X3) -> U22(X1, X2, X3),
   U22(X1, active X2, X3) -> U22(X1, X2, X3),
     U22(mark X1, X2, X3) -> U22(X1, X2, X3),
   U22(active X1, X2, X3) -> U22(X1, X2, X3),
     U21(X1, X2, mark X3) -> U21(X1, X2, X3),
   U21(X1, X2, active X3) -> U21(X1, X2, X3),
     U21(X1, mark X2, X3) -> U21(X1, X2, X3),
   U21(X1, active X2, X3) -> U21(X1, X2, X3),
     U21(mark X1, X2, X3) -> U21(X1, X2, X3),
   U21(active X1, X2, X3) -> U21(X1, X2, X3),
           x(X1, mark X2) -> x(X1, X2),
         x(X1, active X2) -> x(X1, X2),
           x(mark X1, X2) -> x(X1, X2),
         x(active X1, X2) -> x(X1, X2)}
  EDG:
   {
    (s# mark X -> s# X, s# active X -> s# X)
    (s# mark X -> s# X, s# mark X -> s# X)
    (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
    (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
    (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
    (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
    (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
    (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
    (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
    (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
    (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
    (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
    (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
    (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
    (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
    (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
    (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
    (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
    (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
    (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
    (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
    (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
    (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
    (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
    (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
    (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
    (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
    (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
    (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
    (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
    (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
    (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
    (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
    (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
    (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
    (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
    (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
    (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
    (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
    (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
    (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
    (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
    (plus#(X1, mark X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
    (plus#(X1, mark X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
    (plus#(X1, mark X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
    (plus#(X1, mark X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
    (plus#(mark X1, X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
    (plus#(mark X1, X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
    (plus#(mark X1, X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
    (plus#(mark X1, X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
    (x#(X1, mark X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
    (x#(X1, mark X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
    (x#(X1, mark X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
    (x#(X1, mark X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
    (x#(mark X1, X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
    (x#(mark X1, X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
    (x#(mark X1, X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
    (x#(mark X1, X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# x(N, 0()) -> mark# 0())
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# x(N, s M) -> U21#(tt(), M, N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# x(N, s M) -> mark# U21(tt(), M, N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U21(tt(), M, N) -> U22#(tt(), M, N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U21(tt(), M, N) -> mark# U22(tt(), M, N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U22(tt(), M, N) -> x#(N, M))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U22(tt(), M, N) -> plus#(x(N, M), N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U22(tt(), M, N) -> mark# plus(x(N, M), N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# plus(N, 0()) -> mark# N)
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# plus(N, s M) -> U11#(tt(), M, N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# plus(N, s M) -> mark# U11(tt(), M, N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U11(tt(), M, N) -> U12#(tt(), M, N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U11(tt(), M, N) -> mark# U12(tt(), M, N))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U12(tt(), M, N) -> plus#(N, M))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U12(tt(), M, N) -> s# plus(N, M))
    (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# U12(tt(), M, N) -> mark# s plus(N, M))
    (mark# s X -> s# mark X, s# active X -> s# X)
    (mark# s X -> s# mark X, s# mark X -> s# X)
    (active# U22(tt(), M, N) -> x#(N, M), x#(active X1, X2) -> x#(X1, X2))
    (active# U22(tt(), M, N) -> x#(N, M), x#(mark X1, X2) -> x#(X1, X2))
    (active# U22(tt(), M, N) -> x#(N, M), x#(X1, active X2) -> x#(X1, X2))
    (active# U22(tt(), M, N) -> x#(N, M), x#(X1, mark X2) -> x#(X1, X2))
    (active# U12(tt(), M, N) -> s# plus(N, M), s# active X -> s# X)
    (active# U12(tt(), M, N) -> s# plus(N, M), s# mark X -> s# X)
    (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(active X1, X2) -> plus#(X1, X2))
    (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(mark X1, X2) -> plus#(X1, X2))
    (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(X1, active X2) -> plus#(X1, X2))
    (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(X1, mark X2) -> plus#(X1, X2))
    (mark# s X -> active# s mark X, active# x(N, 0()) -> mark# 0())
    (mark# s X -> active# s mark X, active# x(N, s M) -> U21#(tt(), M, N))
    (mark# s X -> active# s mark X, active# x(N, s M) -> mark# U21(tt(), M, N))
    (mark# s X -> active# s mark X, active# U21(tt(), M, N) -> U22#(tt(), M, N))
    (mark# s X -> active# s mark X, active# U21(tt(), M, N) -> mark# U22(tt(), M, N))
    (mark# s X -> active# s mark X, active# U22(tt(), M, N) -> x#(N, M))
    (mark# s X -> active# s mark X, active# U22(tt(), M, N) -> plus#(x(N, M), N))
    (mark# s X -> active# s mark X, active# U22(tt(), M, N) -> mark# plus(x(N, M), N))
    (mark# s X -> active# s mark X, active# plus(N, 0()) -> mark# N)
    (mark# s X -> active# s mark X, active# plus(N, s M) -> U11#(tt(), M, N))
    (mark# s X -> active# s mark X, active# plus(N, s M) -> mark# U11(tt(), M, N))
    (mark# s X -> active# s mark X, active# U11(tt(), M, N) -> U12#(tt(), M, N))
    (mark# s X -> active# s mark X, active# U11(tt(), M, N) -> mark# U12(tt(), M, N))
    (mark# s X -> active# s mark X, active# U12(tt(), M, N) -> plus#(N, M))
    (mark# s X -> active# s mark X, active# U12(tt(), M, N) -> s# plus(N, M))
    (mark# s X -> active# s mark X, active# U12(tt(), M, N) -> mark# s plus(N, M))
    (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
    (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
    (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
    (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
    (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
    (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
    (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
    (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# x(N, 0()) -> mark# 0())
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# x(N, s M) -> U21#(tt(), M, N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# x(N, s M) -> mark# U21(tt(), M, N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U21(tt(), M, N) -> U22#(tt(), M, N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U21(tt(), M, N) -> mark# U22(tt(), M, N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U22(tt(), M, N) -> x#(N, M))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U22(tt(), M, N) -> plus#(x(N, M), N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U22(tt(), M, N) -> mark# plus(x(N, M), N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# plus(N, 0()) -> mark# N)
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# plus(N, s M) -> U11#(tt(), M, N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# plus(N, s M) -> mark# U11(tt(), M, N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U11(tt(), M, N) -> U12#(tt(), M, N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U11(tt(), M, N) -> mark# U12(tt(), M, N))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U12(tt(), M, N) -> plus#(N, M))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U12(tt(), M, N) -> s# plus(N, M))
    (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U12(tt(), M, N) -> mark# s plus(N, M))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# x(N, 0()) -> mark# 0())
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# x(N, s M) -> U21#(tt(), M, N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# x(N, s M) -> mark# U21(tt(), M, N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U21(tt(), M, N) -> U22#(tt(), M, N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U21(tt(), M, N) -> mark# U22(tt(), M, N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U22(tt(), M, N) -> x#(N, M))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U22(tt(), M, N) -> plus#(x(N, M), N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U22(tt(), M, N) -> mark# plus(x(N, M), N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# plus(N, 0()) -> mark# N)
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# plus(N, s M) -> U11#(tt(), M, N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# plus(N, s M) -> mark# U11(tt(), M, N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U11(tt(), M, N) -> U12#(tt(), M, N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U11(tt(), M, N) -> mark# U12(tt(), M, N))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U12(tt(), M, N) -> plus#(N, M))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U12(tt(), M, N) -> s# plus(N, M))
    (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U12(tt(), M, N) -> mark# s plus(N, M))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# x(X1, X2) -> x#(mark X1, mark X2))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# x(X1, X2) -> mark# X2)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# x(X1, X2) -> mark# X1)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U21(X1, X2, X3) -> mark# X1)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U22(X1, X2, X3) -> mark# X1)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# plus(X1, X2) -> mark# X2)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# plus(X1, X2) -> mark# X1)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# s X -> s# mark X)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# s X -> active# s mark X)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# s X -> mark# X)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U11(X1, X2, X3) -> mark# X1)
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U12(X1, X2, X3) -> mark# X1)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# x(X1, X2) -> x#(mark X1, mark X2))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# x(X1, X2) -> mark# X2)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# x(X1, X2) -> mark# X1)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U21(X1, X2, X3) -> mark# X1)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U22(X1, X2, X3) -> mark# X1)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# plus(X1, X2) -> mark# X2)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# plus(X1, X2) -> mark# X1)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# s X -> s# mark X)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# s X -> active# s mark X)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# s X -> mark# X)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U11(X1, X2, X3) -> mark# X1)
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U12(X1, X2, X3) -> mark# X1)
    (active# plus(N, 0()) -> mark# N, mark# 0() -> active# 0())
    (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> mark# X2)
    (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> mark# X1)
    (active# plus(N, 0()) -> mark# N, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (active# plus(N, 0()) -> mark# N, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (active# plus(N, 0()) -> mark# N, mark# U21(X1, X2, X3) -> mark# X1)
    (active# plus(N, 0()) -> mark# N, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (active# plus(N, 0()) -> mark# N, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (active# plus(N, 0()) -> mark# N, mark# U22(X1, X2, X3) -> mark# X1)
    (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> mark# X2)
    (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> mark# X1)
    (active# plus(N, 0()) -> mark# N, mark# s X -> s# mark X)
    (active# plus(N, 0()) -> mark# N, mark# s X -> active# s mark X)
    (active# plus(N, 0()) -> mark# N, mark# s X -> mark# X)
    (active# plus(N, 0()) -> mark# N, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (active# plus(N, 0()) -> mark# N, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (active# plus(N, 0()) -> mark# N, mark# U11(X1, X2, X3) -> mark# X1)
    (active# plus(N, 0()) -> mark# N, mark# tt() -> active# tt())
    (active# plus(N, 0()) -> mark# N, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (active# plus(N, 0()) -> mark# N, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (active# plus(N, 0()) -> mark# N, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
    (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
    (mark# U12(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (mark# U12(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X1, mark# 0() -> active# 0())
    (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X2)
    (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
    (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X1, mark# s X -> s# mark X)
    (mark# plus(X1, X2) -> mark# X1, mark# s X -> active# s mark X)
    (mark# plus(X1, X2) -> mark# X1, mark# s X -> mark# X)
    (mark# plus(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X1, mark# tt() -> active# tt())
    (mark# plus(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
    (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
    (mark# U21(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (mark# U21(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X2, mark# 0() -> active# 0())
    (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X2)
    (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X2)
    (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X2, mark# s X -> s# mark X)
    (mark# plus(X1, X2) -> mark# X2, mark# s X -> active# s mark X)
    (mark# plus(X1, X2) -> mark# X2, mark# s X -> mark# X)
    (mark# plus(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> mark# X1)
    (mark# plus(X1, X2) -> mark# X2, mark# tt() -> active# tt())
    (mark# plus(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (mark# plus(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# x(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# x(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X2, mark# tt() -> active# tt())
    (mark# x(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> mark# X1)
    (mark# x(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X2, mark# s X -> mark# X)
    (mark# x(X1, X2) -> mark# X2, mark# s X -> active# s mark X)
    (mark# x(X1, X2) -> mark# X2, mark# s X -> s# mark X)
    (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X1)
    (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X2)
    (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (mark# x(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> mark# X1)
    (mark# x(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> mark# X1)
    (mark# x(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X1)
    (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X2)
    (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# x(X1, X2) -> mark# X2, mark# 0() -> active# 0())
    (mark# x(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# x(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X1, mark# tt() -> active# tt())
    (mark# x(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
    (mark# x(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X1, mark# s X -> mark# X)
    (mark# x(X1, X2) -> mark# X1, mark# s X -> active# s mark X)
    (mark# x(X1, X2) -> mark# X1, mark# s X -> s# mark X)
    (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
    (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
    (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (mark# x(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
    (mark# x(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
    (mark# x(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X1)
    (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X2)
    (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# x(X1, X2) -> mark# X1, mark# 0() -> active# 0())
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
    (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# U22(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
    (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# U11(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
    (active# U22(tt(), M, N) -> plus#(x(N, M), N), plus#(X1, mark X2) -> plus#(X1, X2))
    (active# U22(tt(), M, N) -> plus#(x(N, M), N), plus#(X1, active X2) -> plus#(X1, X2))
    (active# U22(tt(), M, N) -> plus#(x(N, M), N), plus#(mark X1, X2) -> plus#(X1, X2))
    (active# U22(tt(), M, N) -> plus#(x(N, M), N), plus#(active X1, X2) -> plus#(X1, X2))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U12(X1, X2, X3) -> mark# X1)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U11(X1, X2, X3) -> mark# X1)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# s X -> mark# X)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# s X -> active# s mark X)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# s X -> s# mark X)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# plus(X1, X2) -> mark# X1)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# plus(X1, X2) -> mark# X2)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U22(X1, X2, X3) -> mark# X1)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U21(X1, X2, X3) -> mark# X1)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# x(X1, X2) -> mark# X1)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# x(X1, X2) -> mark# X2)
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (active# x(N, s M) -> mark# U21(tt(), M, N), mark# x(X1, X2) -> x#(mark X1, mark X2))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U12(X1, X2, X3) -> mark# X1)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U11(X1, X2, X3) -> mark# X1)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# s X -> mark# X)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# s X -> active# s mark X)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# s X -> s# mark X)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# plus(X1, X2) -> mark# X1)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# plus(X1, X2) -> mark# X2)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U22(X1, X2, X3) -> mark# X1)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U21(X1, X2, X3) -> mark# X1)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# x(X1, X2) -> mark# X1)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# x(X1, X2) -> mark# X2)
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U12(tt(), M, N) -> mark# s plus(N, M))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U12(tt(), M, N) -> s# plus(N, M))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U12(tt(), M, N) -> plus#(N, M))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U11(tt(), M, N) -> mark# U12(tt(), M, N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U11(tt(), M, N) -> U12#(tt(), M, N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# plus(N, s M) -> mark# U11(tt(), M, N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# plus(N, s M) -> U11#(tt(), M, N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# plus(N, 0()) -> mark# N)
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U22(tt(), M, N) -> mark# plus(x(N, M), N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U22(tt(), M, N) -> plus#(x(N, M), N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U22(tt(), M, N) -> x#(N, M))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U21(tt(), M, N) -> mark# U22(tt(), M, N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U21(tt(), M, N) -> U22#(tt(), M, N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# x(N, s M) -> mark# U21(tt(), M, N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# x(N, s M) -> U21#(tt(), M, N))
    (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# x(N, 0()) -> mark# 0())
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U12(tt(), M, N) -> mark# s plus(N, M))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U12(tt(), M, N) -> s# plus(N, M))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U12(tt(), M, N) -> plus#(N, M))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U11(tt(), M, N) -> mark# U12(tt(), M, N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U11(tt(), M, N) -> U12#(tt(), M, N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# plus(N, s M) -> mark# U11(tt(), M, N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# plus(N, s M) -> U11#(tt(), M, N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# plus(N, 0()) -> mark# N)
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U22(tt(), M, N) -> mark# plus(x(N, M), N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U22(tt(), M, N) -> plus#(x(N, M), N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U22(tt(), M, N) -> x#(N, M))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U21(tt(), M, N) -> mark# U22(tt(), M, N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U21(tt(), M, N) -> U22#(tt(), M, N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# x(N, s M) -> mark# U21(tt(), M, N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# x(N, s M) -> U21#(tt(), M, N))
    (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# x(N, 0()) -> mark# 0())
    (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
    (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
    (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
    (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
    (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
    (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
    (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
    (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U12(X1, X2, X3) -> mark# X1)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U11(X1, X2, X3) -> mark# X1)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# s X -> mark# X)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# s X -> active# s mark X)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# s X -> s# mark X)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# plus(X1, X2) -> mark# X1)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# plus(X1, X2) -> mark# X2)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U22(X1, X2, X3) -> mark# X1)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U21(X1, X2, X3) -> mark# X1)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# x(X1, X2) -> mark# X1)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# x(X1, X2) -> mark# X2)
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(X1, mark X2) -> x#(X1, X2))
    (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(X1, active X2) -> x#(X1, X2))
    (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(mark X1, X2) -> x#(X1, X2))
    (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(active X1, X2) -> x#(X1, X2))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U12(X1, X2, X3) -> mark# X1)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U11(X1, X2, X3) -> mark# X1)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# s X -> mark# X)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# s X -> active# s mark X)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# s X -> s# mark X)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> mark# X1)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> mark# X2)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U22(X1, X2, X3) -> mark# X1)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U21(X1, X2, X3) -> mark# X1)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# x(X1, X2) -> mark# X1)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# x(X1, X2) -> mark# X2)
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# x(X1, X2) -> x#(mark X1, mark X2))
    (active# x(N, 0()) -> mark# 0(), mark# 0() -> active# 0())
    (active# U12(tt(), M, N) -> plus#(N, M), plus#(X1, mark X2) -> plus#(X1, X2))
    (active# U12(tt(), M, N) -> plus#(N, M), plus#(X1, active X2) -> plus#(X1, X2))
    (active# U12(tt(), M, N) -> plus#(N, M), plus#(mark X1, X2) -> plus#(X1, X2))
    (active# U12(tt(), M, N) -> plus#(N, M), plus#(active X1, X2) -> plus#(X1, X2))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U12(tt(), M, N) -> mark# s plus(N, M))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U12(tt(), M, N) -> s# plus(N, M))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U12(tt(), M, N) -> plus#(N, M))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U11(tt(), M, N) -> mark# U12(tt(), M, N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U11(tt(), M, N) -> U12#(tt(), M, N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# plus(N, s M) -> mark# U11(tt(), M, N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# plus(N, s M) -> U11#(tt(), M, N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# plus(N, 0()) -> mark# N)
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U22(tt(), M, N) -> mark# plus(x(N, M), N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U22(tt(), M, N) -> plus#(x(N, M), N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U22(tt(), M, N) -> x#(N, M))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U21(tt(), M, N) -> mark# U22(tt(), M, N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# U21(tt(), M, N) -> U22#(tt(), M, N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# x(N, s M) -> mark# U21(tt(), M, N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# x(N, s M) -> U21#(tt(), M, N))
    (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# x(N, 0()) -> mark# 0())
    (x#(active X1, X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
    (x#(active X1, X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
    (x#(active X1, X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
    (x#(active X1, X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
    (x#(X1, active X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
    (x#(X1, active X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
    (x#(X1, active X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
    (x#(X1, active X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
    (plus#(active X1, X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
    (plus#(active X1, X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
    (plus#(active X1, X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
    (plus#(active X1, X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
    (plus#(X1, active X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
    (plus#(X1, active X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
    (plus#(X1, active X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
    (plus#(X1, active X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
    (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
    (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
    (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
    (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
    (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
    (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
    (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
    (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
    (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
    (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
    (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
    (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
    (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
    (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
    (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
    (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
    (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
    (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
    (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
    (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
    (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
    (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
    (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
    (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
    (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
    (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
    (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
    (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
    (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
    (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
    (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
    (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
    (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
    (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
    (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
    (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
    (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
    (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
    (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
    (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
    (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
    (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
    (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
    (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
    (s# active X -> s# X, s# mark X -> s# X)
    (s# active X -> s# X, s# active X -> s# X)
    (mark# s X -> mark# X, mark# U12(X1, X2, X3) -> mark# X1)
    (mark# s X -> mark# X, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
    (mark# s X -> mark# X, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
    (mark# s X -> mark# X, mark# tt() -> active# tt())
    (mark# s X -> mark# X, mark# U11(X1, X2, X3) -> mark# X1)
    (mark# s X -> mark# X, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
    (mark# s X -> mark# X, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
    (mark# s X -> mark# X, mark# s X -> mark# X)
    (mark# s X -> mark# X, mark# s X -> active# s mark X)
    (mark# s X -> mark# X, mark# s X -> s# mark X)
    (mark# s X -> mark# X, mark# plus(X1, X2) -> mark# X1)
    (mark# s X -> mark# X, mark# plus(X1, X2) -> mark# X2)
    (mark# s X -> mark# X, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
    (mark# s X -> mark# X, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
    (mark# s X -> mark# X, mark# U22(X1, X2, X3) -> mark# X1)
    (mark# s X -> mark# X, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
    (mark# s X -> mark# X, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
    (mark# s X -> mark# X, mark# U21(X1, X2, X3) -> mark# X1)
    (mark# s X -> mark# X, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
    (mark# s X -> mark# X, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
    (mark# s X -> mark# X, mark# x(X1, X2) -> mark# X1)
    (mark# s X -> mark# X, mark# x(X1, X2) -> mark# X2)
    (mark# s X -> mark# X, mark# x(X1, X2) -> active# x(mark X1, mark X2))
    (mark# s X -> mark# X, mark# x(X1, X2) -> x#(mark X1, mark X2))
    (mark# s X -> mark# X, mark# 0() -> active# 0())
   }
   EDG:
    {
     (s# mark X -> s# X, s# active X -> s# X)
     (s# mark X -> s# X, s# mark X -> s# X)
     (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
     (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
     (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
     (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
     (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
     (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
     (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
     (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
     (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
     (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
     (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
     (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
     (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
     (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
     (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
     (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
     (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
     (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
     (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
     (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
     (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
     (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
     (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
     (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
     (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
     (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
     (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
     (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
     (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
     (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
     (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
     (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
     (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
     (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
     (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
     (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
     (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
     (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
     (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
     (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
     (plus#(X1, mark X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
     (plus#(X1, mark X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
     (plus#(X1, mark X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
     (plus#(X1, mark X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
     (plus#(mark X1, X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
     (plus#(mark X1, X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
     (plus#(mark X1, X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
     (plus#(mark X1, X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
     (x#(X1, mark X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
     (x#(X1, mark X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
     (x#(X1, mark X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
     (x#(X1, mark X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
     (x#(mark X1, X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
     (x#(mark X1, X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
     (x#(mark X1, X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
     (x#(mark X1, X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
     (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# plus(N, 0()) -> mark# N)
     (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# plus(N, s M) -> U11#(tt(), M, N))
     (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# plus(N, s M) -> mark# U11(tt(), M, N))
     (mark# s X -> s# mark X, s# active X -> s# X)
     (mark# s X -> s# mark X, s# mark X -> s# X)
     (active# U22(tt(), M, N) -> x#(N, M), x#(active X1, X2) -> x#(X1, X2))
     (active# U22(tt(), M, N) -> x#(N, M), x#(mark X1, X2) -> x#(X1, X2))
     (active# U22(tt(), M, N) -> x#(N, M), x#(X1, active X2) -> x#(X1, X2))
     (active# U22(tt(), M, N) -> x#(N, M), x#(X1, mark X2) -> x#(X1, X2))
     (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(active X1, X2) -> plus#(X1, X2))
     (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(mark X1, X2) -> plus#(X1, X2))
     (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(X1, active X2) -> plus#(X1, X2))
     (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(X1, mark X2) -> plus#(X1, X2))
     (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
     (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
     (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
     (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
     (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
     (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
     (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
     (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
     (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U12(tt(), M, N) -> plus#(N, M))
     (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U12(tt(), M, N) -> s# plus(N, M))
     (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U12(tt(), M, N) -> mark# s plus(N, M))
     (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U22(tt(), M, N) -> x#(N, M))
     (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U22(tt(), M, N) -> plus#(x(N, M), N))
     (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U22(tt(), M, N) -> mark# plus(x(N, M), N))
     (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U12(X1, X2, X3) -> mark# X1)
     (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U22(X1, X2, X3) -> mark# X1)
     (active# plus(N, 0()) -> mark# N, mark# 0() -> active# 0())
     (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> mark# X2)
     (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> mark# X1)
     (active# plus(N, 0()) -> mark# N, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (active# plus(N, 0()) -> mark# N, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (active# plus(N, 0()) -> mark# N, mark# U21(X1, X2, X3) -> mark# X1)
     (active# plus(N, 0()) -> mark# N, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (active# plus(N, 0()) -> mark# N, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (active# plus(N, 0()) -> mark# N, mark# U22(X1, X2, X3) -> mark# X1)
     (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> mark# X2)
     (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> mark# X1)
     (active# plus(N, 0()) -> mark# N, mark# s X -> s# mark X)
     (active# plus(N, 0()) -> mark# N, mark# s X -> active# s mark X)
     (active# plus(N, 0()) -> mark# N, mark# s X -> mark# X)
     (active# plus(N, 0()) -> mark# N, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (active# plus(N, 0()) -> mark# N, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (active# plus(N, 0()) -> mark# N, mark# U11(X1, X2, X3) -> mark# X1)
     (active# plus(N, 0()) -> mark# N, mark# tt() -> active# tt())
     (active# plus(N, 0()) -> mark# N, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (active# plus(N, 0()) -> mark# N, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (active# plus(N, 0()) -> mark# N, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
     (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
     (mark# U12(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (mark# U12(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X1, mark# 0() -> active# 0())
     (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X2)
     (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
     (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X1, mark# s X -> s# mark X)
     (mark# plus(X1, X2) -> mark# X1, mark# s X -> active# s mark X)
     (mark# plus(X1, X2) -> mark# X1, mark# s X -> mark# X)
     (mark# plus(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X1, mark# tt() -> active# tt())
     (mark# plus(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
     (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
     (mark# U21(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (mark# U21(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X2, mark# 0() -> active# 0())
     (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X2)
     (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X2)
     (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X2, mark# s X -> s# mark X)
     (mark# plus(X1, X2) -> mark# X2, mark# s X -> active# s mark X)
     (mark# plus(X1, X2) -> mark# X2, mark# s X -> mark# X)
     (mark# plus(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> mark# X1)
     (mark# plus(X1, X2) -> mark# X2, mark# tt() -> active# tt())
     (mark# plus(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (mark# plus(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# x(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# x(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X2, mark# tt() -> active# tt())
     (mark# x(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> mark# X1)
     (mark# x(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X2, mark# s X -> mark# X)
     (mark# x(X1, X2) -> mark# X2, mark# s X -> active# s mark X)
     (mark# x(X1, X2) -> mark# X2, mark# s X -> s# mark X)
     (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X1)
     (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X2)
     (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (mark# x(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> mark# X1)
     (mark# x(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> mark# X1)
     (mark# x(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X1)
     (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X2)
     (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (mark# x(X1, X2) -> mark# X2, mark# 0() -> active# 0())
     (mark# x(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# x(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X1, mark# tt() -> active# tt())
     (mark# x(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
     (mark# x(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X1, mark# s X -> mark# X)
     (mark# x(X1, X2) -> mark# X1, mark# s X -> active# s mark X)
     (mark# x(X1, X2) -> mark# X1, mark# s X -> s# mark X)
     (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
     (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
     (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (mark# x(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
     (mark# x(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
     (mark# x(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X1)
     (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X2)
     (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (mark# x(X1, X2) -> mark# X1, mark# 0() -> active# 0())
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
     (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (mark# U22(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
     (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (mark# U11(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
     (active# U22(tt(), M, N) -> plus#(x(N, M), N), plus#(X1, mark X2) -> plus#(X1, X2))
     (active# U22(tt(), M, N) -> plus#(x(N, M), N), plus#(X1, active X2) -> plus#(X1, X2))
     (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U21(X1, X2, X3) -> mark# X1)
     (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U11(X1, X2, X3) -> mark# X1)
     (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U21(tt(), M, N) -> mark# U22(tt(), M, N))
     (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U21(tt(), M, N) -> U22#(tt(), M, N))
     (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U11(tt(), M, N) -> mark# U12(tt(), M, N))
     (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U11(tt(), M, N) -> U12#(tt(), M, N))
     (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
     (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
     (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
     (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
     (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
     (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
     (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
     (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
     (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# s X -> mark# X)
     (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# s X -> active# s mark X)
     (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# s X -> s# mark X)
     (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(X1, mark X2) -> x#(X1, X2))
     (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(X1, active X2) -> x#(X1, X2))
     (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(mark X1, X2) -> x#(X1, X2))
     (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(active X1, X2) -> x#(X1, X2))
     (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> mark# X1)
     (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> mark# X2)
     (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (active# x(N, 0()) -> mark# 0(), mark# 0() -> active# 0())
     (active# U12(tt(), M, N) -> plus#(N, M), plus#(X1, mark X2) -> plus#(X1, X2))
     (active# U12(tt(), M, N) -> plus#(N, M), plus#(X1, active X2) -> plus#(X1, X2))
     (active# U12(tt(), M, N) -> plus#(N, M), plus#(mark X1, X2) -> plus#(X1, X2))
     (active# U12(tt(), M, N) -> plus#(N, M), plus#(active X1, X2) -> plus#(X1, X2))
     (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# x(N, s M) -> mark# U21(tt(), M, N))
     (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# x(N, s M) -> U21#(tt(), M, N))
     (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# x(N, 0()) -> mark# 0())
     (x#(active X1, X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
     (x#(active X1, X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
     (x#(active X1, X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
     (x#(active X1, X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
     (x#(X1, active X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
     (x#(X1, active X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
     (x#(X1, active X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
     (x#(X1, active X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
     (plus#(active X1, X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
     (plus#(active X1, X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
     (plus#(active X1, X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
     (plus#(active X1, X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
     (plus#(X1, active X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
     (plus#(X1, active X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
     (plus#(X1, active X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
     (plus#(X1, active X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
     (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
     (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
     (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
     (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
     (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
     (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
     (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
     (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
     (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
     (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
     (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
     (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
     (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
     (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
     (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
     (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
     (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
     (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
     (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
     (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
     (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
     (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
     (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
     (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
     (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
     (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
     (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
     (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
     (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
     (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
     (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
     (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
     (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
     (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
     (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
     (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
     (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
     (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
     (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
     (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
     (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
     (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
     (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
     (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
     (s# active X -> s# X, s# mark X -> s# X)
     (s# active X -> s# X, s# active X -> s# X)
     (mark# s X -> mark# X, mark# U12(X1, X2, X3) -> mark# X1)
     (mark# s X -> mark# X, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
     (mark# s X -> mark# X, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
     (mark# s X -> mark# X, mark# tt() -> active# tt())
     (mark# s X -> mark# X, mark# U11(X1, X2, X3) -> mark# X1)
     (mark# s X -> mark# X, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
     (mark# s X -> mark# X, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
     (mark# s X -> mark# X, mark# s X -> mark# X)
     (mark# s X -> mark# X, mark# s X -> active# s mark X)
     (mark# s X -> mark# X, mark# s X -> s# mark X)
     (mark# s X -> mark# X, mark# plus(X1, X2) -> mark# X1)
     (mark# s X -> mark# X, mark# plus(X1, X2) -> mark# X2)
     (mark# s X -> mark# X, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
     (mark# s X -> mark# X, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
     (mark# s X -> mark# X, mark# U22(X1, X2, X3) -> mark# X1)
     (mark# s X -> mark# X, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
     (mark# s X -> mark# X, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
     (mark# s X -> mark# X, mark# U21(X1, X2, X3) -> mark# X1)
     (mark# s X -> mark# X, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
     (mark# s X -> mark# X, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
     (mark# s X -> mark# X, mark# x(X1, X2) -> mark# X1)
     (mark# s X -> mark# X, mark# x(X1, X2) -> mark# X2)
     (mark# s X -> mark# X, mark# x(X1, X2) -> active# x(mark X1, mark X2))
     (mark# s X -> mark# X, mark# x(X1, X2) -> x#(mark X1, mark X2))
     (mark# s X -> mark# X, mark# 0() -> active# 0())
    }
    EDG:
     {
      (s# mark X -> s# X, s# active X -> s# X)
      (s# mark X -> s# X, s# mark X -> s# X)
      (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
      (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
      (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
      (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
      (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
      (mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
      (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
      (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
      (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
      (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
      (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
      (mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
      (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, mark X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
      (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
      (U12#(X1, mark X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
      (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
      (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
      (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
      (U12#(mark X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
      (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, mark X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
      (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
      (U11#(X1, mark X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
      (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
      (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
      (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
      (U11#(mark X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
      (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, mark X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
      (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
      (U22#(X1, mark X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
      (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
      (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
      (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
      (U22#(mark X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
      (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, mark X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
      (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
      (U21#(X1, mark X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
      (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
      (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
      (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
      (U21#(mark X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
      (plus#(X1, mark X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
      (plus#(X1, mark X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
      (plus#(X1, mark X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
      (plus#(X1, mark X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
      (plus#(mark X1, X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
      (plus#(mark X1, X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
      (plus#(mark X1, X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
      (plus#(mark X1, X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
      (x#(X1, mark X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
      (x#(X1, mark X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
      (x#(X1, mark X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
      (x#(X1, mark X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
      (x#(mark X1, X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
      (x#(mark X1, X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
      (x#(mark X1, X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
      (x#(mark X1, X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
      (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# plus(N, 0()) -> mark# N)
      (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# plus(N, s M) -> U11#(tt(), M, N))
      (mark# plus(X1, X2) -> active# plus(mark X1, mark X2), active# plus(N, s M) -> mark# U11(tt(), M, N))
      (mark# s X -> s# mark X, s# active X -> s# X)
      (mark# s X -> s# mark X, s# mark X -> s# X)
      (active# U22(tt(), M, N) -> x#(N, M), x#(active X1, X2) -> x#(X1, X2))
      (active# U22(tt(), M, N) -> x#(N, M), x#(mark X1, X2) -> x#(X1, X2))
      (active# U22(tt(), M, N) -> x#(N, M), x#(X1, active X2) -> x#(X1, X2))
      (active# U22(tt(), M, N) -> x#(N, M), x#(X1, mark X2) -> x#(X1, X2))
      (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(active X1, X2) -> plus#(X1, X2))
      (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(mark X1, X2) -> plus#(X1, X2))
      (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(X1, active X2) -> plus#(X1, X2))
      (mark# plus(X1, X2) -> plus#(mark X1, mark X2), plus#(X1, mark X2) -> plus#(X1, X2))
      (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
      (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
      (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
      (active# U11(tt(), M, N) -> U12#(tt(), M, N), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
      (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
      (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
      (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
      (active# U21(tt(), M, N) -> U22#(tt(), M, N), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
      (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U12(tt(), M, N) -> plus#(N, M))
      (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U12(tt(), M, N) -> s# plus(N, M))
      (mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3), active# U12(tt(), M, N) -> mark# s plus(N, M))
      (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U22(tt(), M, N) -> x#(N, M))
      (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U22(tt(), M, N) -> plus#(x(N, M), N))
      (mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3), active# U22(tt(), M, N) -> mark# plus(x(N, M), N))
      (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (active# U11(tt(), M, N) -> mark# U12(tt(), M, N), mark# U12(X1, X2, X3) -> mark# X1)
      (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (active# U21(tt(), M, N) -> mark# U22(tt(), M, N), mark# U22(X1, X2, X3) -> mark# X1)
      (active# plus(N, 0()) -> mark# N, mark# 0() -> active# 0())
      (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> mark# X2)
      (active# plus(N, 0()) -> mark# N, mark# x(X1, X2) -> mark# X1)
      (active# plus(N, 0()) -> mark# N, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (active# plus(N, 0()) -> mark# N, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (active# plus(N, 0()) -> mark# N, mark# U21(X1, X2, X3) -> mark# X1)
      (active# plus(N, 0()) -> mark# N, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (active# plus(N, 0()) -> mark# N, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (active# plus(N, 0()) -> mark# N, mark# U22(X1, X2, X3) -> mark# X1)
      (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> mark# X2)
      (active# plus(N, 0()) -> mark# N, mark# plus(X1, X2) -> mark# X1)
      (active# plus(N, 0()) -> mark# N, mark# s X -> s# mark X)
      (active# plus(N, 0()) -> mark# N, mark# s X -> active# s mark X)
      (active# plus(N, 0()) -> mark# N, mark# s X -> mark# X)
      (active# plus(N, 0()) -> mark# N, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (active# plus(N, 0()) -> mark# N, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (active# plus(N, 0()) -> mark# N, mark# U11(X1, X2, X3) -> mark# X1)
      (active# plus(N, 0()) -> mark# N, mark# tt() -> active# tt())
      (active# plus(N, 0()) -> mark# N, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (active# plus(N, 0()) -> mark# N, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (active# plus(N, 0()) -> mark# N, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
      (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
      (mark# U12(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (mark# U12(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X1, mark# 0() -> active# 0())
      (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X2)
      (mark# plus(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
      (mark# plus(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X1, mark# s X -> s# mark X)
      (mark# plus(X1, X2) -> mark# X1, mark# s X -> active# s mark X)
      (mark# plus(X1, X2) -> mark# X1, mark# s X -> mark# X)
      (mark# plus(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X1, mark# tt() -> active# tt())
      (mark# plus(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
      (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
      (mark# U21(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (mark# U21(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X2, mark# 0() -> active# 0())
      (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X2)
      (mark# plus(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X2)
      (mark# plus(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X2, mark# s X -> s# mark X)
      (mark# plus(X1, X2) -> mark# X2, mark# s X -> active# s mark X)
      (mark# plus(X1, X2) -> mark# X2, mark# s X -> mark# X)
      (mark# plus(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> mark# X1)
      (mark# plus(X1, X2) -> mark# X2, mark# tt() -> active# tt())
      (mark# plus(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (mark# plus(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# x(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# x(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X2, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X2, mark# tt() -> active# tt())
      (mark# x(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> mark# X1)
      (mark# x(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X2, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X2, mark# s X -> mark# X)
      (mark# x(X1, X2) -> mark# X2, mark# s X -> active# s mark X)
      (mark# x(X1, X2) -> mark# X2, mark# s X -> s# mark X)
      (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X1)
      (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> mark# X2)
      (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (mark# x(X1, X2) -> mark# X2, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (mark# x(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> mark# X1)
      (mark# x(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X2, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> mark# X1)
      (mark# x(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X2, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X1)
      (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> mark# X2)
      (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (mark# x(X1, X2) -> mark# X2, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (mark# x(X1, X2) -> mark# X2, mark# 0() -> active# 0())
      (mark# x(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# x(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X1, mark# tt() -> active# tt())
      (mark# x(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
      (mark# x(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X1, mark# s X -> mark# X)
      (mark# x(X1, X2) -> mark# X1, mark# s X -> active# s mark X)
      (mark# x(X1, X2) -> mark# X1, mark# s X -> s# mark X)
      (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
      (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
      (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (mark# x(X1, X2) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (mark# x(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
      (mark# x(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
      (mark# x(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X1)
      (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> mark# X2)
      (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (mark# x(X1, X2) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (mark# x(X1, X2) -> mark# X1, mark# 0() -> active# 0())
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
      (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (mark# U22(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# tt() -> active# tt())
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> mark# X1)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# s X -> mark# X)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# s X -> active# s mark X)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# s X -> s# mark X)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X1)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> mark# X2)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> mark# X1)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> mark# X1)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X1)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> mark# X2)
      (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (mark# U11(X1, X2, X3) -> mark# X1, mark# 0() -> active# 0())
      (active# U22(tt(), M, N) -> plus#(x(N, M), N), plus#(X1, mark X2) -> plus#(X1, X2))
      (active# U22(tt(), M, N) -> plus#(x(N, M), N), plus#(X1, active X2) -> plus#(X1, X2))
      (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U21(X1, X2, X3) -> mark# X1)
      (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (active# x(N, s M) -> mark# U21(tt(), M, N), mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U11(X1, X2, X3) -> mark# X1)
      (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (active# plus(N, s M) -> mark# U11(tt(), M, N), mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U21(tt(), M, N) -> mark# U22(tt(), M, N))
      (mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3), active# U21(tt(), M, N) -> U22#(tt(), M, N))
      (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U11(tt(), M, N) -> mark# U12(tt(), M, N))
      (mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3), active# U11(tt(), M, N) -> U12#(tt(), M, N))
      (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
      (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
      (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
      (active# x(N, s M) -> U21#(tt(), M, N), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
      (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
      (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
      (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
      (active# plus(N, s M) -> U11#(tt(), M, N), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
      (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# s X -> mark# X)
      (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# s X -> active# s mark X)
      (active# U12(tt(), M, N) -> mark# s plus(N, M), mark# s X -> s# mark X)
      (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(X1, mark X2) -> x#(X1, X2))
      (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(X1, active X2) -> x#(X1, X2))
      (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(mark X1, X2) -> x#(X1, X2))
      (mark# x(X1, X2) -> x#(mark X1, mark X2), x#(active X1, X2) -> x#(X1, X2))
      (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> mark# X1)
      (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> mark# X2)
      (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (active# U22(tt(), M, N) -> mark# plus(x(N, M), N), mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (active# x(N, 0()) -> mark# 0(), mark# 0() -> active# 0())
      (active# U12(tt(), M, N) -> plus#(N, M), plus#(X1, mark X2) -> plus#(X1, X2))
      (active# U12(tt(), M, N) -> plus#(N, M), plus#(X1, active X2) -> plus#(X1, X2))
      (active# U12(tt(), M, N) -> plus#(N, M), plus#(mark X1, X2) -> plus#(X1, X2))
      (active# U12(tt(), M, N) -> plus#(N, M), plus#(active X1, X2) -> plus#(X1, X2))
      (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# x(N, s M) -> mark# U21(tt(), M, N))
      (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# x(N, s M) -> U21#(tt(), M, N))
      (mark# x(X1, X2) -> active# x(mark X1, mark X2), active# x(N, 0()) -> mark# 0())
      (x#(active X1, X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
      (x#(active X1, X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
      (x#(active X1, X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
      (x#(active X1, X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
      (x#(X1, active X2) -> x#(X1, X2), x#(X1, mark X2) -> x#(X1, X2))
      (x#(X1, active X2) -> x#(X1, X2), x#(X1, active X2) -> x#(X1, X2))
      (x#(X1, active X2) -> x#(X1, X2), x#(mark X1, X2) -> x#(X1, X2))
      (x#(X1, active X2) -> x#(X1, X2), x#(active X1, X2) -> x#(X1, X2))
      (plus#(active X1, X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
      (plus#(active X1, X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
      (plus#(active X1, X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
      (plus#(active X1, X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
      (plus#(X1, active X2) -> plus#(X1, X2), plus#(X1, mark X2) -> plus#(X1, X2))
      (plus#(X1, active X2) -> plus#(X1, X2), plus#(X1, active X2) -> plus#(X1, X2))
      (plus#(X1, active X2) -> plus#(X1, X2), plus#(mark X1, X2) -> plus#(X1, X2))
      (plus#(X1, active X2) -> plus#(X1, X2), plus#(active X1, X2) -> plus#(X1, X2))
      (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
      (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
      (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
      (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
      (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(active X1, X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
      (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
      (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, active X2, X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
      (U21#(X1, X2, active X3) -> U21#(X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
      (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
      (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
      (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
      (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
      (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(active X1, X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
      (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
      (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, active X2, X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, X2, mark X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, X2, active X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, mark X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(X1, active X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(mark X1, X2, X3) -> U22#(X1, X2, X3))
      (U22#(X1, X2, active X3) -> U22#(X1, X2, X3), U22#(active X1, X2, X3) -> U22#(X1, X2, X3))
      (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
      (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
      (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
      (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
      (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(active X1, X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
      (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
      (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, active X2, X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
      (U11#(X1, X2, active X3) -> U11#(X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
      (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
      (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
      (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
      (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
      (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(active X1, X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
      (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
      (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, active X2, X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, X2, mark X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, X2, active X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, mark X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(X1, active X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(mark X1, X2, X3) -> U12#(X1, X2, X3))
      (U12#(X1, X2, active X3) -> U12#(X1, X2, X3), U12#(active X1, X2, X3) -> U12#(X1, X2, X3))
      (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, X2, mark X3) -> U21#(X1, X2, X3))
      (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, X2, active X3) -> U21#(X1, X2, X3))
      (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, mark X2, X3) -> U21#(X1, X2, X3))
      (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(X1, active X2, X3) -> U21#(X1, X2, X3))
      (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(mark X1, X2, X3) -> U21#(X1, X2, X3))
      (mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3), U21#(active X1, X2, X3) -> U21#(X1, X2, X3))
      (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, X2, mark X3) -> U11#(X1, X2, X3))
      (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, X2, active X3) -> U11#(X1, X2, X3))
      (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, mark X2, X3) -> U11#(X1, X2, X3))
      (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(X1, active X2, X3) -> U11#(X1, X2, X3))
      (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(mark X1, X2, X3) -> U11#(X1, X2, X3))
      (mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3), U11#(active X1, X2, X3) -> U11#(X1, X2, X3))
      (s# active X -> s# X, s# mark X -> s# X)
      (s# active X -> s# X, s# active X -> s# X)
      (mark# s X -> mark# X, mark# U12(X1, X2, X3) -> mark# X1)
      (mark# s X -> mark# X, mark# U12(X1, X2, X3) -> U12#(mark X1, X2, X3))
      (mark# s X -> mark# X, mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3))
      (mark# s X -> mark# X, mark# tt() -> active# tt())
      (mark# s X -> mark# X, mark# U11(X1, X2, X3) -> mark# X1)
      (mark# s X -> mark# X, mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3))
      (mark# s X -> mark# X, mark# U11(X1, X2, X3) -> U11#(mark X1, X2, X3))
      (mark# s X -> mark# X, mark# s X -> mark# X)
      (mark# s X -> mark# X, mark# s X -> active# s mark X)
      (mark# s X -> mark# X, mark# s X -> s# mark X)
      (mark# s X -> mark# X, mark# plus(X1, X2) -> mark# X1)
      (mark# s X -> mark# X, mark# plus(X1, X2) -> mark# X2)
      (mark# s X -> mark# X, mark# plus(X1, X2) -> active# plus(mark X1, mark X2))
      (mark# s X -> mark# X, mark# plus(X1, X2) -> plus#(mark X1, mark X2))
      (mark# s X -> mark# X, mark# U22(X1, X2, X3) -> mark# X1)
      (mark# s X -> mark# X, mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3))
      (mark# s X -> mark# X, mark# U22(X1, X2, X3) -> U22#(mark X1, X2, X3))
      (mark# s X -> mark# X, mark# U21(X1, X2, X3) -> mark# X1)
      (mark# s X -> mark# X, mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3))
      (mark# s X -> mark# X, mark# U21(X1, X2, X3) -> U21#(mark X1, X2, X3))
      (mark# s X -> mark# X, mark# x(X1, X2) -> mark# X1)
      (mark# s X -> mark# X, mark# x(X1, X2) -> mark# X2)
      (mark# s X -> mark# X, mark# x(X1, X2) -> active# x(mark X1, mark X2))
      (mark# s X -> mark# X, mark# x(X1, X2) -> x#(mark X1, mark X2))
      (mark# s X -> mark# X, mark# 0() -> active# 0())
     }
     STATUS:
      arrows: 0.906489
      SCCS (8):
       Scc:
        {  mark# U12(X1, X2, X3) -> mark# X1,
           mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3),
           mark# U11(X1, X2, X3) -> mark# X1,
           mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3),
                       mark# s X -> mark# X,
              mark# plus(X1, X2) -> mark# X1,
              mark# plus(X1, X2) -> mark# X2,
              mark# plus(X1, X2) -> active# plus(mark X1, mark X2),
           mark# U22(X1, X2, X3) -> mark# X1,
           mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3),
           mark# U21(X1, X2, X3) -> mark# X1,
           mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3),
                 mark# x(X1, X2) -> mark# X1,
                 mark# x(X1, X2) -> mark# X2,
                 mark# x(X1, X2) -> active# x(mark X1, mark X2),
         active# U12(tt(), M, N) -> mark# s plus(N, M),
         active# U11(tt(), M, N) -> mark# U12(tt(), M, N),
            active# plus(N, s M) -> mark# U11(tt(), M, N),
            active# plus(N, 0()) -> mark# N,
         active# U22(tt(), M, N) -> mark# plus(x(N, M), N),
         active# U21(tt(), M, N) -> mark# U22(tt(), M, N),
               active# x(N, s M) -> mark# U21(tt(), M, N)}
       Scc:
        {  U21#(X1, X2, mark X3) -> U21#(X1, X2, X3),
         U21#(X1, X2, active X3) -> U21#(X1, X2, X3),
           U21#(X1, mark X2, X3) -> U21#(X1, X2, X3),
         U21#(X1, active X2, X3) -> U21#(X1, X2, X3),
           U21#(mark X1, X2, X3) -> U21#(X1, X2, X3),
         U21#(active X1, X2, X3) -> U21#(X1, X2, X3)}
       Scc:
        {  U22#(X1, X2, mark X3) -> U22#(X1, X2, X3),
         U22#(X1, X2, active X3) -> U22#(X1, X2, X3),
           U22#(X1, mark X2, X3) -> U22#(X1, X2, X3),
         U22#(X1, active X2, X3) -> U22#(X1, X2, X3),
           U22#(mark X1, X2, X3) -> U22#(X1, X2, X3),
         U22#(active X1, X2, X3) -> U22#(X1, X2, X3)}
       Scc:
        {  x#(X1, mark X2) -> x#(X1, X2),
         x#(X1, active X2) -> x#(X1, X2),
           x#(mark X1, X2) -> x#(X1, X2),
         x#(active X1, X2) -> x#(X1, X2)}
       Scc:
        {  U11#(X1, X2, mark X3) -> U11#(X1, X2, X3),
         U11#(X1, X2, active X3) -> U11#(X1, X2, X3),
           U11#(X1, mark X2, X3) -> U11#(X1, X2, X3),
         U11#(X1, active X2, X3) -> U11#(X1, X2, X3),
           U11#(mark X1, X2, X3) -> U11#(X1, X2, X3),
         U11#(active X1, X2, X3) -> U11#(X1, X2, X3)}
       Scc:
        {  plus#(X1, mark X2) -> plus#(X1, X2),
         plus#(X1, active X2) -> plus#(X1, X2),
           plus#(mark X1, X2) -> plus#(X1, X2),
         plus#(active X1, X2) -> plus#(X1, X2)}
       Scc:
        {  s# mark X -> s# X,
         s# active X -> s# X}
       Scc:
        {  U12#(X1, X2, mark X3) -> U12#(X1, X2, X3),
         U12#(X1, X2, active X3) -> U12#(X1, X2, X3),
           U12#(X1, mark X2, X3) -> U12#(X1, X2, X3),
         U12#(X1, active X2, X3) -> U12#(X1, X2, X3),
           U12#(mark X1, X2, X3) -> U12#(X1, X2, X3),
         U12#(active X1, X2, X3) -> U12#(X1, X2, X3)}
       
       SCC (22):
        Strict:
         {  mark# U12(X1, X2, X3) -> mark# X1,
            mark# U12(X1, X2, X3) -> active# U12(mark X1, X2, X3),
            mark# U11(X1, X2, X3) -> mark# X1,
            mark# U11(X1, X2, X3) -> active# U11(mark X1, X2, X3),
                        mark# s X -> mark# X,
               mark# plus(X1, X2) -> mark# X1,
               mark# plus(X1, X2) -> mark# X2,
               mark# plus(X1, X2) -> active# plus(mark X1, mark X2),
            mark# U22(X1, X2, X3) -> mark# X1,
            mark# U22(X1, X2, X3) -> active# U22(mark X1, X2, X3),
            mark# U21(X1, X2, X3) -> mark# X1,
            mark# U21(X1, X2, X3) -> active# U21(mark X1, X2, X3),
                  mark# x(X1, X2) -> mark# X1,
                  mark# x(X1, X2) -> mark# X2,
                  mark# x(X1, X2) -> active# x(mark X1, mark X2),
          active# U12(tt(), M, N) -> mark# s plus(N, M),
          active# U11(tt(), M, N) -> mark# U12(tt(), M, N),
             active# plus(N, s M) -> mark# U11(tt(), M, N),
             active# plus(N, 0()) -> mark# N,
          active# U22(tt(), M, N) -> mark# plus(x(N, M), N),
          active# U21(tt(), M, N) -> mark# U22(tt(), M, N),
                active# x(N, s M) -> mark# U21(tt(), M, N)}
        Weak:
        {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
                      mark tt() -> active tt(),
           mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                       mark s X -> active s mark X,
              mark plus(X1, X2) -> active plus(mark X1, mark X2),
           mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
           mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
                 mark x(X1, X2) -> active x(mark X1, mark X2),
                       mark 0() -> active 0(),
           U12(X1, X2, mark X3) -> U12(X1, X2, X3),
         U12(X1, X2, active X3) -> U12(X1, X2, X3),
           U12(X1, mark X2, X3) -> U12(X1, X2, X3),
         U12(X1, active X2, X3) -> U12(X1, X2, X3),
           U12(mark X1, X2, X3) -> U12(X1, X2, X3),
         U12(active X1, X2, X3) -> U12(X1, X2, X3),
         active U12(tt(), M, N) -> mark s plus(N, M),
         active U11(tt(), M, N) -> mark U12(tt(), M, N),
            active plus(N, s M) -> mark U11(tt(), M, N),
            active plus(N, 0()) -> mark N,
         active U22(tt(), M, N) -> mark plus(x(N, M), N),
         active U21(tt(), M, N) -> mark U22(tt(), M, N),
               active x(N, s M) -> mark U21(tt(), M, N),
               active x(N, 0()) -> mark 0(),
           U11(X1, X2, mark X3) -> U11(X1, X2, X3),
         U11(X1, X2, active X3) -> U11(X1, X2, X3),
           U11(X1, mark X2, X3) -> U11(X1, X2, X3),
         U11(X1, active X2, X3) -> U11(X1, X2, X3),
           U11(mark X1, X2, X3) -> U11(X1, X2, X3),
         U11(active X1, X2, X3) -> U11(X1, X2, X3),
                       s mark X -> s X,
                     s active X -> s X,
              plus(X1, mark X2) -> plus(X1, X2),
            plus(X1, active X2) -> plus(X1, X2),
              plus(mark X1, X2) -> plus(X1, X2),
            plus(active X1, X2) -> plus(X1, X2),
           U22(X1, X2, mark X3) -> U22(X1, X2, X3),
         U22(X1, X2, active X3) -> U22(X1, X2, X3),
           U22(X1, mark X2, X3) -> U22(X1, X2, X3),
         U22(X1, active X2, X3) -> U22(X1, X2, X3),
           U22(mark X1, X2, X3) -> U22(X1, X2, X3),
         U22(active X1, X2, X3) -> U22(X1, X2, X3),
           U21(X1, X2, mark X3) -> U21(X1, X2, X3),
         U21(X1, X2, active X3) -> U21(X1, X2, X3),
           U21(X1, mark X2, X3) -> U21(X1, X2, X3),
         U21(X1, active X2, X3) -> U21(X1, X2, X3),
           U21(mark X1, X2, X3) -> U21(X1, X2, X3),
         U21(active X1, X2, X3) -> U21(X1, X2, X3),
                 x(X1, mark X2) -> x(X1, X2),
               x(X1, active X2) -> x(X1, X2),
                 x(mark X1, X2) -> x(X1, X2),
               x(active X1, X2) -> x(X1, X2)}
        Open
       
       
       
       
       
       SCC (6):
        Strict:
         {  U21#(X1, X2, mark X3) -> U21#(X1, X2, X3),
          U21#(X1, X2, active X3) -> U21#(X1, X2, X3),
            U21#(X1, mark X2, X3) -> U21#(X1, X2, X3),
          U21#(X1, active X2, X3) -> U21#(X1, X2, X3),
            U21#(mark X1, X2, X3) -> U21#(X1, X2, X3),
          U21#(active X1, X2, X3) -> U21#(X1, X2, X3)}
        Weak:
        {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
                      mark tt() -> active tt(),
           mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                       mark s X -> active s mark X,
              mark plus(X1, X2) -> active plus(mark X1, mark X2),
           mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
           mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
                 mark x(X1, X2) -> active x(mark X1, mark X2),
                       mark 0() -> active 0(),
           U12(X1, X2, mark X3) -> U12(X1, X2, X3),
         U12(X1, X2, active X3) -> U12(X1, X2, X3),
           U12(X1, mark X2, X3) -> U12(X1, X2, X3),
         U12(X1, active X2, X3) -> U12(X1, X2, X3),
           U12(mark X1, X2, X3) -> U12(X1, X2, X3),
         U12(active X1, X2, X3) -> U12(X1, X2, X3),
         active U12(tt(), M, N) -> mark s plus(N, M),
         active U11(tt(), M, N) -> mark U12(tt(), M, N),
            active plus(N, s M) -> mark U11(tt(), M, N),
            active plus(N, 0()) -> mark N,
         active U22(tt(), M, N) -> mark plus(x(N, M), N),
         active U21(tt(), M, N) -> mark U22(tt(), M, N),
               active x(N, s M) -> mark U21(tt(), M, N),
               active x(N, 0()) -> mark 0(),
           U11(X1, X2, mark X3) -> U11(X1, X2, X3),
         U11(X1, X2, active X3) -> U11(X1, X2, X3),
           U11(X1, mark X2, X3) -> U11(X1, X2, X3),
         U11(X1, active X2, X3) -> U11(X1, X2, X3),
           U11(mark X1, X2, X3) -> U11(X1, X2, X3),
         U11(active X1, X2, X3) -> U11(X1, X2, X3),
                       s mark X -> s X,
                     s active X -> s X,
              plus(X1, mark X2) -> plus(X1, X2),
            plus(X1, active X2) -> plus(X1, X2),
              plus(mark X1, X2) -> plus(X1, X2),
            plus(active X1, X2) -> plus(X1, X2),
           U22(X1, X2, mark X3) -> U22(X1, X2, X3),
         U22(X1, X2, active X3) -> U22(X1, X2, X3),
           U22(X1, mark X2, X3) -> U22(X1, X2, X3),
         U22(X1, active X2, X3) -> U22(X1, X2, X3),
           U22(mark X1, X2, X3) -> U22(X1, X2, X3),
         U22(active X1, X2, X3) -> U22(X1, X2, X3),
           U21(X1, X2, mark X3) -> U21(X1, X2, X3),
         U21(X1, X2, active X3) -> U21(X1, X2, X3),
           U21(X1, mark X2, X3) -> U21(X1, X2, X3),
         U21(X1, active X2, X3) -> U21(X1, X2, X3),
           U21(mark X1, X2, X3) -> U21(X1, X2, X3),
         U21(active X1, X2, X3) -> U21(X1, X2, X3),
                 x(X1, mark X2) -> x(X1, X2),
               x(X1, active X2) -> x(X1, X2),
                 x(mark X1, X2) -> x(X1, X2),
               x(active X1, X2) -> x(X1, X2)}
        Open
       
       
       SCC (6):
        Strict:
         {  U22#(X1, X2, mark X3) -> U22#(X1, X2, X3),
          U22#(X1, X2, active X3) -> U22#(X1, X2, X3),
            U22#(X1, mark X2, X3) -> U22#(X1, X2, X3),
          U22#(X1, active X2, X3) -> U22#(X1, X2, X3),
            U22#(mark X1, X2, X3) -> U22#(X1, X2, X3),
          U22#(active X1, X2, X3) -> U22#(X1, X2, X3)}
        Weak:
        {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
                      mark tt() -> active tt(),
           mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                       mark s X -> active s mark X,
              mark plus(X1, X2) -> active plus(mark X1, mark X2),
           mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
           mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
                 mark x(X1, X2) -> active x(mark X1, mark X2),
                       mark 0() -> active 0(),
           U12(X1, X2, mark X3) -> U12(X1, X2, X3),
         U12(X1, X2, active X3) -> U12(X1, X2, X3),
           U12(X1, mark X2, X3) -> U12(X1, X2, X3),
         U12(X1, active X2, X3) -> U12(X1, X2, X3),
           U12(mark X1, X2, X3) -> U12(X1, X2, X3),
         U12(active X1, X2, X3) -> U12(X1, X2, X3),
         active U12(tt(), M, N) -> mark s plus(N, M),
         active U11(tt(), M, N) -> mark U12(tt(), M, N),
            active plus(N, s M) -> mark U11(tt(), M, N),
            active plus(N, 0()) -> mark N,
         active U22(tt(), M, N) -> mark plus(x(N, M), N),
         active U21(tt(), M, N) -> mark U22(tt(), M, N),
               active x(N, s M) -> mark U21(tt(), M, N),
               active x(N, 0()) -> mark 0(),
           U11(X1, X2, mark X3) -> U11(X1, X2, X3),
         U11(X1, X2, active X3) -> U11(X1, X2, X3),
           U11(X1, mark X2, X3) -> U11(X1, X2, X3),
         U11(X1, active X2, X3) -> U11(X1, X2, X3),
           U11(mark X1, X2, X3) -> U11(X1, X2, X3),
         U11(active X1, X2, X3) -> U11(X1, X2, X3),
                       s mark X -> s X,
                     s active X -> s X,
              plus(X1, mark X2) -> plus(X1, X2),
            plus(X1, active X2) -> plus(X1, X2),
              plus(mark X1, X2) -> plus(X1, X2),
            plus(active X1, X2) -> plus(X1, X2),
           U22(X1, X2, mark X3) -> U22(X1, X2, X3),
         U22(X1, X2, active X3) -> U22(X1, X2, X3),
           U22(X1, mark X2, X3) -> U22(X1, X2, X3),
         U22(X1, active X2, X3) -> U22(X1, X2, X3),
           U22(mark X1, X2, X3) -> U22(X1, X2, X3),
         U22(active X1, X2, X3) -> U22(X1, X2, X3),
           U21(X1, X2, mark X3) -> U21(X1, X2, X3),
         U21(X1, X2, active X3) -> U21(X1, X2, X3),
           U21(X1, mark X2, X3) -> U21(X1, X2, X3),
         U21(X1, active X2, X3) -> U21(X1, X2, X3),
           U21(mark X1, X2, X3) -> U21(X1, X2, X3),
         U21(active X1, X2, X3) -> U21(X1, X2, X3),
                 x(X1, mark X2) -> x(X1, X2),
               x(X1, active X2) -> x(X1, X2),
                 x(mark X1, X2) -> x(X1, X2),
               x(active X1, X2) -> x(X1, X2)}
        Open
       
       SCC (4):
        Strict:
         {  x#(X1, mark X2) -> x#(X1, X2),
          x#(X1, active X2) -> x#(X1, X2),
            x#(mark X1, X2) -> x#(X1, X2),
          x#(active X1, X2) -> x#(X1, X2)}
        Weak:
        {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
                      mark tt() -> active tt(),
           mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                       mark s X -> active s mark X,
              mark plus(X1, X2) -> active plus(mark X1, mark X2),
           mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
           mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
                 mark x(X1, X2) -> active x(mark X1, mark X2),
                       mark 0() -> active 0(),
           U12(X1, X2, mark X3) -> U12(X1, X2, X3),
         U12(X1, X2, active X3) -> U12(X1, X2, X3),
           U12(X1, mark X2, X3) -> U12(X1, X2, X3),
         U12(X1, active X2, X3) -> U12(X1, X2, X3),
           U12(mark X1, X2, X3) -> U12(X1, X2, X3),
         U12(active X1, X2, X3) -> U12(X1, X2, X3),
         active U12(tt(), M, N) -> mark s plus(N, M),
         active U11(tt(), M, N) -> mark U12(tt(), M, N),
            active plus(N, s M) -> mark U11(tt(), M, N),
            active plus(N, 0()) -> mark N,
         active U22(tt(), M, N) -> mark plus(x(N, M), N),
         active U21(tt(), M, N) -> mark U22(tt(), M, N),
               active x(N, s M) -> mark U21(tt(), M, N),
               active x(N, 0()) -> mark 0(),
           U11(X1, X2, mark X3) -> U11(X1, X2, X3),
         U11(X1, X2, active X3) -> U11(X1, X2, X3),
           U11(X1, mark X2, X3) -> U11(X1, X2, X3),
         U11(X1, active X2, X3) -> U11(X1, X2, X3),
           U11(mark X1, X2, X3) -> U11(X1, X2, X3),
         U11(active X1, X2, X3) -> U11(X1, X2, X3),
                       s mark X -> s X,
                     s active X -> s X,
              plus(X1, mark X2) -> plus(X1, X2),
            plus(X1, active X2) -> plus(X1, X2),
              plus(mark X1, X2) -> plus(X1, X2),
            plus(active X1, X2) -> plus(X1, X2),
           U22(X1, X2, mark X3) -> U22(X1, X2, X3),
         U22(X1, X2, active X3) -> U22(X1, X2, X3),
           U22(X1, mark X2, X3) -> U22(X1, X2, X3),
         U22(X1, active X2, X3) -> U22(X1, X2, X3),
           U22(mark X1, X2, X3) -> U22(X1, X2, X3),
         U22(active X1, X2, X3) -> U22(X1, X2, X3),
           U21(X1, X2, mark X3) -> U21(X1, X2, X3),
         U21(X1, X2, active X3) -> U21(X1, X2, X3),
           U21(X1, mark X2, X3) -> U21(X1, X2, X3),
         U21(X1, active X2, X3) -> U21(X1, X2, X3),
           U21(mark X1, X2, X3) -> U21(X1, X2, X3),
         U21(active X1, X2, X3) -> U21(X1, X2, X3),
                 x(X1, mark X2) -> x(X1, X2),
               x(X1, active X2) -> x(X1, X2),
                 x(mark X1, X2) -> x(X1, X2),
               x(active X1, X2) -> x(X1, X2)}
        Open
       
       
       
       
       SCC (6):
        Strict:
         {  U11#(X1, X2, mark X3) -> U11#(X1, X2, X3),
          U11#(X1, X2, active X3) -> U11#(X1, X2, X3),
            U11#(X1, mark X2, X3) -> U11#(X1, X2, X3),
          U11#(X1, active X2, X3) -> U11#(X1, X2, X3),
            U11#(mark X1, X2, X3) -> U11#(X1, X2, X3),
          U11#(active X1, X2, X3) -> U11#(X1, X2, X3)}
        Weak:
        {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
                      mark tt() -> active tt(),
           mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                       mark s X -> active s mark X,
              mark plus(X1, X2) -> active plus(mark X1, mark X2),
           mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
           mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
                 mark x(X1, X2) -> active x(mark X1, mark X2),
                       mark 0() -> active 0(),
           U12(X1, X2, mark X3) -> U12(X1, X2, X3),
         U12(X1, X2, active X3) -> U12(X1, X2, X3),
           U12(X1, mark X2, X3) -> U12(X1, X2, X3),
         U12(X1, active X2, X3) -> U12(X1, X2, X3),
           U12(mark X1, X2, X3) -> U12(X1, X2, X3),
         U12(active X1, X2, X3) -> U12(X1, X2, X3),
         active U12(tt(), M, N) -> mark s plus(N, M),
         active U11(tt(), M, N) -> mark U12(tt(), M, N),
            active plus(N, s M) -> mark U11(tt(), M, N),
            active plus(N, 0()) -> mark N,
         active U22(tt(), M, N) -> mark plus(x(N, M), N),
         active U21(tt(), M, N) -> mark U22(tt(), M, N),
               active x(N, s M) -> mark U21(tt(), M, N),
               active x(N, 0()) -> mark 0(),
           U11(X1, X2, mark X3) -> U11(X1, X2, X3),
         U11(X1, X2, active X3) -> U11(X1, X2, X3),
           U11(X1, mark X2, X3) -> U11(X1, X2, X3),
         U11(X1, active X2, X3) -> U11(X1, X2, X3),
           U11(mark X1, X2, X3) -> U11(X1, X2, X3),
         U11(active X1, X2, X3) -> U11(X1, X2, X3),
                       s mark X -> s X,
                     s active X -> s X,
              plus(X1, mark X2) -> plus(X1, X2),
            plus(X1, active X2) -> plus(X1, X2),
              plus(mark X1, X2) -> plus(X1, X2),
            plus(active X1, X2) -> plus(X1, X2),
           U22(X1, X2, mark X3) -> U22(X1, X2, X3),
         U22(X1, X2, active X3) -> U22(X1, X2, X3),
           U22(X1, mark X2, X3) -> U22(X1, X2, X3),
         U22(X1, active X2, X3) -> U22(X1, X2, X3),
           U22(mark X1, X2, X3) -> U22(X1, X2, X3),
         U22(active X1, X2, X3) -> U22(X1, X2, X3),
           U21(X1, X2, mark X3) -> U21(X1, X2, X3),
         U21(X1, X2, active X3) -> U21(X1, X2, X3),
           U21(X1, mark X2, X3) -> U21(X1, X2, X3),
         U21(X1, active X2, X3) -> U21(X1, X2, X3),
           U21(mark X1, X2, X3) -> U21(X1, X2, X3),
         U21(active X1, X2, X3) -> U21(X1, X2, X3),
                 x(X1, mark X2) -> x(X1, X2),
               x(X1, active X2) -> x(X1, X2),
                 x(mark X1, X2) -> x(X1, X2),
               x(active X1, X2) -> x(X1, X2)}
        Open
       
       
       
       SCC (4):
        Strict:
         {  plus#(X1, mark X2) -> plus#(X1, X2),
          plus#(X1, active X2) -> plus#(X1, X2),
            plus#(mark X1, X2) -> plus#(X1, X2),
          plus#(active X1, X2) -> plus#(X1, X2)}
        Weak:
        {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
                      mark tt() -> active tt(),
           mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                       mark s X -> active s mark X,
              mark plus(X1, X2) -> active plus(mark X1, mark X2),
           mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
           mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
                 mark x(X1, X2) -> active x(mark X1, mark X2),
                       mark 0() -> active 0(),
           U12(X1, X2, mark X3) -> U12(X1, X2, X3),
         U12(X1, X2, active X3) -> U12(X1, X2, X3),
           U12(X1, mark X2, X3) -> U12(X1, X2, X3),
         U12(X1, active X2, X3) -> U12(X1, X2, X3),
           U12(mark X1, X2, X3) -> U12(X1, X2, X3),
         U12(active X1, X2, X3) -> U12(X1, X2, X3),
         active U12(tt(), M, N) -> mark s plus(N, M),
         active U11(tt(), M, N) -> mark U12(tt(), M, N),
            active plus(N, s M) -> mark U11(tt(), M, N),
            active plus(N, 0()) -> mark N,
         active U22(tt(), M, N) -> mark plus(x(N, M), N),
         active U21(tt(), M, N) -> mark U22(tt(), M, N),
               active x(N, s M) -> mark U21(tt(), M, N),
               active x(N, 0()) -> mark 0(),
           U11(X1, X2, mark X3) -> U11(X1, X2, X3),
         U11(X1, X2, active X3) -> U11(X1, X2, X3),
           U11(X1, mark X2, X3) -> U11(X1, X2, X3),
         U11(X1, active X2, X3) -> U11(X1, X2, X3),
           U11(mark X1, X2, X3) -> U11(X1, X2, X3),
         U11(active X1, X2, X3) -> U11(X1, X2, X3),
                       s mark X -> s X,
                     s active X -> s X,
              plus(X1, mark X2) -> plus(X1, X2),
            plus(X1, active X2) -> plus(X1, X2),
              plus(mark X1, X2) -> plus(X1, X2),
            plus(active X1, X2) -> plus(X1, X2),
           U22(X1, X2, mark X3) -> U22(X1, X2, X3),
         U22(X1, X2, active X3) -> U22(X1, X2, X3),
           U22(X1, mark X2, X3) -> U22(X1, X2, X3),
         U22(X1, active X2, X3) -> U22(X1, X2, X3),
           U22(mark X1, X2, X3) -> U22(X1, X2, X3),
         U22(active X1, X2, X3) -> U22(X1, X2, X3),
           U21(X1, X2, mark X3) -> U21(X1, X2, X3),
         U21(X1, X2, active X3) -> U21(X1, X2, X3),
           U21(X1, mark X2, X3) -> U21(X1, X2, X3),
         U21(X1, active X2, X3) -> U21(X1, X2, X3),
           U21(mark X1, X2, X3) -> U21(X1, X2, X3),
         U21(active X1, X2, X3) -> U21(X1, X2, X3),
                 x(X1, mark X2) -> x(X1, X2),
               x(X1, active X2) -> x(X1, X2),
                 x(mark X1, X2) -> x(X1, X2),
               x(active X1, X2) -> x(X1, X2)}
        Open
       
       
       SCC (2):
        Strict:
         {  s# mark X -> s# X,
          s# active X -> s# X}
        Weak:
        {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
                      mark tt() -> active tt(),
           mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                       mark s X -> active s mark X,
              mark plus(X1, X2) -> active plus(mark X1, mark X2),
           mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
           mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
                 mark x(X1, X2) -> active x(mark X1, mark X2),
                       mark 0() -> active 0(),
           U12(X1, X2, mark X3) -> U12(X1, X2, X3),
         U12(X1, X2, active X3) -> U12(X1, X2, X3),
           U12(X1, mark X2, X3) -> U12(X1, X2, X3),
         U12(X1, active X2, X3) -> U12(X1, X2, X3),
           U12(mark X1, X2, X3) -> U12(X1, X2, X3),
         U12(active X1, X2, X3) -> U12(X1, X2, X3),
         active U12(tt(), M, N) -> mark s plus(N, M),
         active U11(tt(), M, N) -> mark U12(tt(), M, N),
            active plus(N, s M) -> mark U11(tt(), M, N),
            active plus(N, 0()) -> mark N,
         active U22(tt(), M, N) -> mark plus(x(N, M), N),
         active U21(tt(), M, N) -> mark U22(tt(), M, N),
               active x(N, s M) -> mark U21(tt(), M, N),
               active x(N, 0()) -> mark 0(),
           U11(X1, X2, mark X3) -> U11(X1, X2, X3),
         U11(X1, X2, active X3) -> U11(X1, X2, X3),
           U11(X1, mark X2, X3) -> U11(X1, X2, X3),
         U11(X1, active X2, X3) -> U11(X1, X2, X3),
           U11(mark X1, X2, X3) -> U11(X1, X2, X3),
         U11(active X1, X2, X3) -> U11(X1, X2, X3),
                       s mark X -> s X,
                     s active X -> s X,
              plus(X1, mark X2) -> plus(X1, X2),
            plus(X1, active X2) -> plus(X1, X2),
              plus(mark X1, X2) -> plus(X1, X2),
            plus(active X1, X2) -> plus(X1, X2),
           U22(X1, X2, mark X3) -> U22(X1, X2, X3),
         U22(X1, X2, active X3) -> U22(X1, X2, X3),
           U22(X1, mark X2, X3) -> U22(X1, X2, X3),
         U22(X1, active X2, X3) -> U22(X1, X2, X3),
           U22(mark X1, X2, X3) -> U22(X1, X2, X3),
         U22(active X1, X2, X3) -> U22(X1, X2, X3),
           U21(X1, X2, mark X3) -> U21(X1, X2, X3),
         U21(X1, X2, active X3) -> U21(X1, X2, X3),
           U21(X1, mark X2, X3) -> U21(X1, X2, X3),
         U21(X1, active X2, X3) -> U21(X1, X2, X3),
           U21(mark X1, X2, X3) -> U21(X1, X2, X3),
         U21(active X1, X2, X3) -> U21(X1, X2, X3),
                 x(X1, mark X2) -> x(X1, X2),
               x(X1, active X2) -> x(X1, X2),
                 x(mark X1, X2) -> x(X1, X2),
               x(active X1, X2) -> x(X1, X2)}
        Open
       
       
       SCC (6):
        Strict:
         {  U12#(X1, X2, mark X3) -> U12#(X1, X2, X3),
          U12#(X1, X2, active X3) -> U12#(X1, X2, X3),
            U12#(X1, mark X2, X3) -> U12#(X1, X2, X3),
          U12#(X1, active X2, X3) -> U12#(X1, X2, X3),
            U12#(mark X1, X2, X3) -> U12#(X1, X2, X3),
          U12#(active X1, X2, X3) -> U12#(X1, X2, X3)}
        Weak:
        {  mark U12(X1, X2, X3) -> active U12(mark X1, X2, X3),
                      mark tt() -> active tt(),
           mark U11(X1, X2, X3) -> active U11(mark X1, X2, X3),
                       mark s X -> active s mark X,
              mark plus(X1, X2) -> active plus(mark X1, mark X2),
           mark U22(X1, X2, X3) -> active U22(mark X1, X2, X3),
           mark U21(X1, X2, X3) -> active U21(mark X1, X2, X3),
                 mark x(X1, X2) -> active x(mark X1, mark X2),
                       mark 0() -> active 0(),
           U12(X1, X2, mark X3) -> U12(X1, X2, X3),
         U12(X1, X2, active X3) -> U12(X1, X2, X3),
           U12(X1, mark X2, X3) -> U12(X1, X2, X3),
         U12(X1, active X2, X3) -> U12(X1, X2, X3),
           U12(mark X1, X2, X3) -> U12(X1, X2, X3),
         U12(active X1, X2, X3) -> U12(X1, X2, X3),
         active U12(tt(), M, N) -> mark s plus(N, M),
         active U11(tt(), M, N) -> mark U12(tt(), M, N),
            active plus(N, s M) -> mark U11(tt(), M, N),
            active plus(N, 0()) -> mark N,
         active U22(tt(), M, N) -> mark plus(x(N, M), N),
         active U21(tt(), M, N) -> mark U22(tt(), M, N),
               active x(N, s M) -> mark U21(tt(), M, N),
               active x(N, 0()) -> mark 0(),
           U11(X1, X2, mark X3) -> U11(X1, X2, X3),
         U11(X1, X2, active X3) -> U11(X1, X2, X3),
           U11(X1, mark X2, X3) -> U11(X1, X2, X3),
         U11(X1, active X2, X3) -> U11(X1, X2, X3),
           U11(mark X1, X2, X3) -> U11(X1, X2, X3),
         U11(active X1, X2, X3) -> U11(X1, X2, X3),
                       s mark X -> s X,
                     s active X -> s X,
              plus(X1, mark X2) -> plus(X1, X2),
            plus(X1, active X2) -> plus(X1, X2),
              plus(mark X1, X2) -> plus(X1, X2),
            plus(active X1, X2) -> plus(X1, X2),
           U22(X1, X2, mark X3) -> U22(X1, X2, X3),
         U22(X1, X2, active X3) -> U22(X1, X2, X3),
           U22(X1, mark X2, X3) -> U22(X1, X2, X3),
         U22(X1, active X2, X3) -> U22(X1, X2, X3),
           U22(mark X1, X2, X3) -> U22(X1, X2, X3),
         U22(active X1, X2, X3) -> U22(X1, X2, X3),
           U21(X1, X2, mark X3) -> U21(X1, X2, X3),
         U21(X1, X2, active X3) -> U21(X1, X2, X3),
           U21(X1, mark X2, X3) -> U21(X1, X2, X3),
         U21(X1, active X2, X3) -> U21(X1, X2, X3),
           U21(mark X1, X2, X3) -> U21(X1, X2, X3),
         U21(active X1, X2, X3) -> U21(X1, X2, X3),
                 x(X1, mark X2) -> x(X1, X2),
               x(X1, active X2) -> x(X1, X2),
                 x(mark X1, X2) -> x(X1, X2),
               x(active X1, X2) -> x(X1, X2)}
        Open