MAYBE
Time: 0.001755
TRS:
 {  fib 0() -> 0(),
  fib s 0() -> s 0(),
  fib s s x -> +(fib s x, fib x)}
 DP:
  DP:
   {fib# s s x -> fib# x,
    fib# s s x -> fib# s x}
  TRS:
  {  fib 0() -> 0(),
   fib s 0() -> s 0(),
   fib s s x -> +(fib s x, fib x)}
  UR:
   {}
   EDG:
    {(fib# s s x -> fib# x, fib# s s x -> fib# s x)
     (fib# s s x -> fib# x, fib# s s x -> fib# x)
     (fib# s s x -> fib# s x, fib# s s x -> fib# x)
     (fib# s s x -> fib# s x, fib# s s x -> fib# s x)}
    STATUS:
     arrows: 0.000000
     SCCS (1):
      Scc:
       {fib# s s x -> fib# x,
        fib# s s x -> fib# s x}
      
      SCC (2):
       Strict:
        {fib# s s x -> fib# x,
         fib# s s x -> fib# s x}
       Weak:
       {  fib 0() -> 0(),
        fib s 0() -> s 0(),
        fib s s x -> +(fib s x, fib x)}
       Open