MAYBE

Problem:
 active(from(X)) -> mark(cons(X,from(s(X))))
 active(after(0(),XS)) -> mark(XS)
 active(after(s(N),cons(X,XS))) -> mark(after(N,XS))
 mark(from(X)) -> active(from(mark(X)))
 mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
 mark(s(X)) -> active(s(mark(X)))
 mark(after(X1,X2)) -> active(after(mark(X1),mark(X2)))
 mark(0()) -> active(0())
 from(mark(X)) -> from(X)
 from(active(X)) -> from(X)
 cons(mark(X1),X2) -> cons(X1,X2)
 cons(X1,mark(X2)) -> cons(X1,X2)
 cons(active(X1),X2) -> cons(X1,X2)
 cons(X1,active(X2)) -> cons(X1,X2)
 s(mark(X)) -> s(X)
 s(active(X)) -> s(X)
 after(mark(X1),X2) -> after(X1,X2)
 after(X1,mark(X2)) -> after(X1,X2)
 after(active(X1),X2) -> after(X1,X2)
 after(X1,active(X2)) -> after(X1,X2)

Proof:
 DP Processor:
  DPs:
   active#(from(X)) -> s#(X)
   active#(from(X)) -> from#(s(X))
   active#(from(X)) -> cons#(X,from(s(X)))
   active#(from(X)) -> mark#(cons(X,from(s(X))))
   active#(after(0(),XS)) -> mark#(XS)
   active#(after(s(N),cons(X,XS))) -> after#(N,XS)
   active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS))
   mark#(from(X)) -> mark#(X)
   mark#(from(X)) -> from#(mark(X))
   mark#(from(X)) -> active#(from(mark(X)))
   mark#(cons(X1,X2)) -> mark#(X1)
   mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
   mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
   mark#(s(X)) -> mark#(X)
   mark#(s(X)) -> s#(mark(X))
   mark#(s(X)) -> active#(s(mark(X)))
   mark#(after(X1,X2)) -> mark#(X2)
   mark#(after(X1,X2)) -> mark#(X1)
   mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
   mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
   mark#(0()) -> active#(0())
   from#(mark(X)) -> from#(X)
   from#(active(X)) -> from#(X)
   cons#(mark(X1),X2) -> cons#(X1,X2)
   cons#(X1,mark(X2)) -> cons#(X1,X2)
   cons#(active(X1),X2) -> cons#(X1,X2)
   cons#(X1,active(X2)) -> cons#(X1,X2)
   s#(mark(X)) -> s#(X)
   s#(active(X)) -> s#(X)
   after#(mark(X1),X2) -> after#(X1,X2)
   after#(X1,mark(X2)) -> after#(X1,X2)
   after#(active(X1),X2) -> after#(X1,X2)
   after#(X1,active(X2)) -> after#(X1,X2)
  TRS:
   active(from(X)) -> mark(cons(X,from(s(X))))
   active(after(0(),XS)) -> mark(XS)
   active(after(s(N),cons(X,XS))) -> mark(after(N,XS))
   mark(from(X)) -> active(from(mark(X)))
   mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
   mark(s(X)) -> active(s(mark(X)))
   mark(after(X1,X2)) -> active(after(mark(X1),mark(X2)))
   mark(0()) -> active(0())
   from(mark(X)) -> from(X)
   from(active(X)) -> from(X)
   cons(mark(X1),X2) -> cons(X1,X2)
   cons(X1,mark(X2)) -> cons(X1,X2)
   cons(active(X1),X2) -> cons(X1,X2)
   cons(X1,active(X2)) -> cons(X1,X2)
   s(mark(X)) -> s(X)
   s(active(X)) -> s(X)
   after(mark(X1),X2) -> after(X1,X2)
   after(X1,mark(X2)) -> after(X1,X2)
   after(active(X1),X2) -> after(X1,X2)
   after(X1,active(X2)) -> after(X1,X2)
  ADG Processor:
   DPs:
    active#(from(X)) -> s#(X)
    active#(from(X)) -> from#(s(X))
    active#(from(X)) -> cons#(X,from(s(X)))
    active#(from(X)) -> mark#(cons(X,from(s(X))))
    active#(after(0(),XS)) -> mark#(XS)
    active#(after(s(N),cons(X,XS))) -> after#(N,XS)
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS))
    mark#(from(X)) -> mark#(X)
    mark#(from(X)) -> from#(mark(X))
    mark#(from(X)) -> active#(from(mark(X)))
    mark#(cons(X1,X2)) -> mark#(X1)
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
    mark#(s(X)) -> mark#(X)
    mark#(s(X)) -> s#(mark(X))
    mark#(s(X)) -> active#(s(mark(X)))
    mark#(after(X1,X2)) -> mark#(X2)
    mark#(after(X1,X2)) -> mark#(X1)
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
    mark#(0()) -> active#(0())
    from#(mark(X)) -> from#(X)
    from#(active(X)) -> from#(X)
    cons#(mark(X1),X2) -> cons#(X1,X2)
    cons#(X1,mark(X2)) -> cons#(X1,X2)
    cons#(active(X1),X2) -> cons#(X1,X2)
    cons#(X1,active(X2)) -> cons#(X1,X2)
    s#(mark(X)) -> s#(X)
    s#(active(X)) -> s#(X)
    after#(mark(X1),X2) -> after#(X1,X2)
    after#(X1,mark(X2)) -> after#(X1,X2)
    after#(active(X1),X2) -> after#(X1,X2)
    after#(X1,active(X2)) -> after#(X1,X2)
   TRS:
    active(from(X)) -> mark(cons(X,from(s(X))))
    active(after(0(),XS)) -> mark(XS)
    active(after(s(N),cons(X,XS))) -> mark(after(N,XS))
    mark(from(X)) -> active(from(mark(X)))
    mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
    mark(s(X)) -> active(s(mark(X)))
    mark(after(X1,X2)) -> active(after(mark(X1),mark(X2)))
    mark(0()) -> active(0())
    from(mark(X)) -> from(X)
    from(active(X)) -> from(X)
    cons(mark(X1),X2) -> cons(X1,X2)
    cons(X1,mark(X2)) -> cons(X1,X2)
    cons(active(X1),X2) -> cons(X1,X2)
    cons(X1,active(X2)) -> cons(X1,X2)
    s(mark(X)) -> s(X)
    s(active(X)) -> s(X)
    after(mark(X1),X2) -> after(X1,X2)
    after(X1,mark(X2)) -> after(X1,X2)
    after(active(X1),X2) -> after(X1,X2)
    after(X1,active(X2)) -> after(X1,X2)
   graph:
    after#(mark(X1),X2) -> after#(X1,X2) ->
    after#(mark(X1),X2) -> after#(X1,X2)
    after#(mark(X1),X2) -> after#(X1,X2) ->
    after#(X1,mark(X2)) -> after#(X1,X2)
    after#(mark(X1),X2) -> after#(X1,X2) ->
    after#(active(X1),X2) -> after#(X1,X2)
    after#(mark(X1),X2) -> after#(X1,X2) ->
    after#(X1,active(X2)) -> after#(X1,X2)
    after#(active(X1),X2) -> after#(X1,X2) ->
    after#(mark(X1),X2) -> after#(X1,X2)
    after#(active(X1),X2) -> after#(X1,X2) ->
    after#(X1,mark(X2)) -> after#(X1,X2)
    after#(active(X1),X2) -> after#(X1,X2) ->
    after#(active(X1),X2) -> after#(X1,X2)
    after#(active(X1),X2) -> after#(X1,X2) ->
    after#(X1,active(X2)) -> after#(X1,X2)
    after#(X1,mark(X2)) -> after#(X1,X2) ->
    after#(mark(X1),X2) -> after#(X1,X2)
    after#(X1,mark(X2)) -> after#(X1,X2) ->
    after#(X1,mark(X2)) -> after#(X1,X2)
    after#(X1,mark(X2)) -> after#(X1,X2) ->
    after#(active(X1),X2) -> after#(X1,X2)
    after#(X1,mark(X2)) -> after#(X1,X2) ->
    after#(X1,active(X2)) -> after#(X1,X2)
    after#(X1,active(X2)) -> after#(X1,X2) ->
    after#(mark(X1),X2) -> after#(X1,X2)
    after#(X1,active(X2)) -> after#(X1,X2) ->
    after#(X1,mark(X2)) -> after#(X1,X2)
    after#(X1,active(X2)) -> after#(X1,X2) ->
    after#(active(X1),X2) -> after#(X1,X2)
    after#(X1,active(X2)) -> after#(X1,X2) ->
    after#(X1,active(X2)) -> after#(X1,X2)
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2)) ->
    after#(mark(X1),X2) -> after#(X1,X2)
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2)) ->
    after#(X1,mark(X2)) -> after#(X1,X2)
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2)) ->
    after#(active(X1),X2) -> after#(X1,X2)
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2)) ->
    after#(X1,active(X2)) -> after#(X1,X2)
    mark#(after(X1,X2)) -> mark#(X2) -> mark#(from(X)) -> mark#(X)
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(from(X)) -> from#(mark(X))
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(from(X)) -> active#(from(mark(X)))
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(cons(X1,X2)) -> mark#(X1)
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
    mark#(after(X1,X2)) -> mark#(X2) -> mark#(s(X)) -> mark#(X)
    mark#(after(X1,X2)) -> mark#(X2) -> mark#(s(X)) -> s#(mark(X))
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(s(X)) -> active#(s(mark(X)))
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(after(X1,X2)) -> mark#(X2)
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(after(X1,X2)) -> mark#(X1)
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
    mark#(after(X1,X2)) -> mark#(X2) ->
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
    mark#(after(X1,X2)) -> mark#(X2) -> mark#(0()) -> active#(0())
    mark#(after(X1,X2)) -> mark#(X1) -> mark#(from(X)) -> mark#(X)
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(from(X)) -> from#(mark(X))
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(from(X)) -> active#(from(mark(X)))
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(cons(X1,X2)) -> mark#(X1)
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
    mark#(after(X1,X2)) -> mark#(X1) -> mark#(s(X)) -> mark#(X)
    mark#(after(X1,X2)) -> mark#(X1) -> mark#(s(X)) -> s#(mark(X))
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(s(X)) -> active#(s(mark(X)))
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(after(X1,X2)) -> mark#(X2)
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(after(X1,X2)) -> mark#(X1)
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
    mark#(after(X1,X2)) -> mark#(X1) ->
    mark#(0()) -> active#(0())
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2))) ->
    active#(from(X)) -> s#(X)
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2))) ->
    active#(from(X)) -> from#(s(X))
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2))) ->
    active#(from(X)) -> cons#(X,from(s(X)))
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2))) ->
    active#(from(X)) -> mark#(cons(X,from(s(X))))
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2))) ->
    active#(after(0(),XS)) -> mark#(XS)
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2))) ->
    active#(after(s(N),cons(X,XS))) -> after#(N,XS)
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2))) ->
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS))
    mark#(cons(X1,X2)) -> mark#(X1) -> mark#(from(X)) -> mark#(X)
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(from(X)) -> from#(mark(X))
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(from(X)) -> active#(from(mark(X)))
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(cons(X1,X2)) -> mark#(X1)
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
    mark#(cons(X1,X2)) -> mark#(X1) -> mark#(s(X)) -> mark#(X)
    mark#(cons(X1,X2)) -> mark#(X1) -> mark#(s(X)) -> s#(mark(X))
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(s(X)) -> active#(s(mark(X)))
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(after(X1,X2)) -> mark#(X2)
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(after(X1,X2)) -> mark#(X1)
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
    mark#(cons(X1,X2)) -> mark#(X1) ->
    mark#(0()) -> active#(0())
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2) ->
    cons#(mark(X1),X2) -> cons#(X1,X2)
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2) ->
    cons#(X1,mark(X2)) -> cons#(X1,X2)
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2) ->
    cons#(active(X1),X2) -> cons#(X1,X2)
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2) ->
    cons#(X1,active(X2)) -> cons#(X1,X2)
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2)) ->
    active#(from(X)) -> s#(X)
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2)) ->
    active#(from(X)) -> from#(s(X))
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2)) ->
    active#(from(X)) -> cons#(X,from(s(X)))
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2)) ->
    active#(from(X)) -> mark#(cons(X,from(s(X))))
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2)) ->
    active#(after(0(),XS)) -> mark#(XS)
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2)) ->
    active#(after(s(N),cons(X,XS))) -> after#(N,XS)
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2)) ->
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS))
    mark#(s(X)) -> mark#(X) -> mark#(from(X)) -> mark#(X)
    mark#(s(X)) -> mark#(X) -> mark#(from(X)) -> from#(mark(X))
    mark#(s(X)) -> mark#(X) -> mark#(from(X)) -> active#(from(mark(X)))
    mark#(s(X)) -> mark#(X) -> mark#(cons(X1,X2)) -> mark#(X1)
    mark#(s(X)) -> mark#(X) -> mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
    mark#(s(X)) -> mark#(X) ->
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
    mark#(s(X)) -> mark#(X) -> mark#(s(X)) -> mark#(X)
    mark#(s(X)) -> mark#(X) -> mark#(s(X)) -> s#(mark(X))
    mark#(s(X)) -> mark#(X) -> mark#(s(X)) -> active#(s(mark(X)))
    mark#(s(X)) -> mark#(X) -> mark#(after(X1,X2)) -> mark#(X2)
    mark#(s(X)) -> mark#(X) -> mark#(after(X1,X2)) -> mark#(X1)
    mark#(s(X)) -> mark#(X) ->
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
    mark#(s(X)) -> mark#(X) ->
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
    mark#(s(X)) -> mark#(X) -> mark#(0()) -> active#(0())
    mark#(s(X)) -> s#(mark(X)) -> s#(mark(X)) -> s#(X)
    mark#(s(X)) -> s#(mark(X)) -> s#(active(X)) -> s#(X)
    mark#(s(X)) -> active#(s(mark(X))) ->
    active#(from(X)) -> s#(X)
    mark#(s(X)) -> active#(s(mark(X))) ->
    active#(from(X)) -> from#(s(X))
    mark#(s(X)) -> active#(s(mark(X))) ->
    active#(from(X)) -> cons#(X,from(s(X)))
    mark#(s(X)) -> active#(s(mark(X))) ->
    active#(from(X)) -> mark#(cons(X,from(s(X))))
    mark#(s(X)) -> active#(s(mark(X))) ->
    active#(after(0(),XS)) -> mark#(XS)
    mark#(s(X)) -> active#(s(mark(X))) ->
    active#(after(s(N),cons(X,XS))) -> after#(N,XS)
    mark#(s(X)) -> active#(s(mark(X))) ->
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS))
    mark#(from(X)) -> mark#(X) -> mark#(from(X)) -> mark#(X)
    mark#(from(X)) -> mark#(X) -> mark#(from(X)) -> from#(mark(X))
    mark#(from(X)) -> mark#(X) ->
    mark#(from(X)) -> active#(from(mark(X)))
    mark#(from(X)) -> mark#(X) -> mark#(cons(X1,X2)) -> mark#(X1)
    mark#(from(X)) -> mark#(X) ->
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
    mark#(from(X)) -> mark#(X) ->
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
    mark#(from(X)) -> mark#(X) -> mark#(s(X)) -> mark#(X)
    mark#(from(X)) -> mark#(X) -> mark#(s(X)) -> s#(mark(X))
    mark#(from(X)) -> mark#(X) -> mark#(s(X)) -> active#(s(mark(X)))
    mark#(from(X)) -> mark#(X) -> mark#(after(X1,X2)) -> mark#(X2)
    mark#(from(X)) -> mark#(X) -> mark#(after(X1,X2)) -> mark#(X1)
    mark#(from(X)) -> mark#(X) ->
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
    mark#(from(X)) -> mark#(X) ->
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
    mark#(from(X)) -> mark#(X) -> mark#(0()) -> active#(0())
    mark#(from(X)) -> from#(mark(X)) -> from#(mark(X)) -> from#(X)
    mark#(from(X)) -> from#(mark(X)) ->
    from#(active(X)) -> from#(X)
    mark#(from(X)) -> active#(from(mark(X))) ->
    active#(from(X)) -> s#(X)
    mark#(from(X)) -> active#(from(mark(X))) ->
    active#(from(X)) -> from#(s(X))
    mark#(from(X)) -> active#(from(mark(X))) ->
    active#(from(X)) -> cons#(X,from(s(X)))
    mark#(from(X)) -> active#(from(mark(X))) ->
    active#(from(X)) -> mark#(cons(X,from(s(X))))
    mark#(from(X)) -> active#(from(mark(X))) ->
    active#(after(0(),XS)) -> mark#(XS)
    mark#(from(X)) -> active#(from(mark(X))) ->
    active#(after(s(N),cons(X,XS))) -> after#(N,XS)
    mark#(from(X)) -> active#(from(mark(X))) ->
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS))
    cons#(mark(X1),X2) -> cons#(X1,X2) ->
    cons#(mark(X1),X2) -> cons#(X1,X2)
    cons#(mark(X1),X2) -> cons#(X1,X2) ->
    cons#(X1,mark(X2)) -> cons#(X1,X2)
    cons#(mark(X1),X2) -> cons#(X1,X2) ->
    cons#(active(X1),X2) -> cons#(X1,X2)
    cons#(mark(X1),X2) -> cons#(X1,X2) ->
    cons#(X1,active(X2)) -> cons#(X1,X2)
    cons#(active(X1),X2) -> cons#(X1,X2) ->
    cons#(mark(X1),X2) -> cons#(X1,X2)
    cons#(active(X1),X2) -> cons#(X1,X2) ->
    cons#(X1,mark(X2)) -> cons#(X1,X2)
    cons#(active(X1),X2) -> cons#(X1,X2) ->
    cons#(active(X1),X2) -> cons#(X1,X2)
    cons#(active(X1),X2) -> cons#(X1,X2) ->
    cons#(X1,active(X2)) -> cons#(X1,X2)
    cons#(X1,mark(X2)) -> cons#(X1,X2) ->
    cons#(mark(X1),X2) -> cons#(X1,X2)
    cons#(X1,mark(X2)) -> cons#(X1,X2) ->
    cons#(X1,mark(X2)) -> cons#(X1,X2)
    cons#(X1,mark(X2)) -> cons#(X1,X2) ->
    cons#(active(X1),X2) -> cons#(X1,X2)
    cons#(X1,mark(X2)) -> cons#(X1,X2) ->
    cons#(X1,active(X2)) -> cons#(X1,X2)
    cons#(X1,active(X2)) -> cons#(X1,X2) ->
    cons#(mark(X1),X2) -> cons#(X1,X2)
    cons#(X1,active(X2)) -> cons#(X1,X2) ->
    cons#(X1,mark(X2)) -> cons#(X1,X2)
    cons#(X1,active(X2)) -> cons#(X1,X2) ->
    cons#(active(X1),X2) -> cons#(X1,X2)
    cons#(X1,active(X2)) -> cons#(X1,X2) ->
    cons#(X1,active(X2)) -> cons#(X1,X2)
    from#(mark(X)) -> from#(X) -> from#(mark(X)) -> from#(X)
    from#(mark(X)) -> from#(X) -> from#(active(X)) -> from#(X)
    from#(active(X)) -> from#(X) -> from#(mark(X)) -> from#(X)
    from#(active(X)) -> from#(X) -> from#(active(X)) -> from#(X)
    s#(mark(X)) -> s#(X) -> s#(mark(X)) -> s#(X)
    s#(mark(X)) -> s#(X) -> s#(active(X)) -> s#(X)
    s#(active(X)) -> s#(X) -> s#(mark(X)) -> s#(X)
    s#(active(X)) -> s#(X) -> s#(active(X)) -> s#(X)
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(from(X)) -> mark#(X)
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(from(X)) -> from#(mark(X))
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(from(X)) -> active#(from(mark(X)))
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(cons(X1,X2)) -> mark#(X1)
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(s(X)) -> mark#(X)
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(s(X)) -> s#(mark(X))
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(s(X)) -> active#(s(mark(X)))
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(after(X1,X2)) -> mark#(X2)
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(after(X1,X2)) -> mark#(X1)
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
    active#(after(0(),XS)) -> mark#(XS) ->
    mark#(0()) -> active#(0())
    active#(after(s(N),cons(X,XS))) -> after#(N,XS) ->
    after#(mark(X1),X2) -> after#(X1,X2)
    active#(after(s(N),cons(X,XS))) -> after#(N,XS) ->
    after#(X1,mark(X2)) -> after#(X1,X2)
    active#(after(s(N),cons(X,XS))) -> after#(N,XS) ->
    after#(active(X1),X2) -> after#(X1,X2)
    active#(after(s(N),cons(X,XS))) -> after#(N,XS) ->
    after#(X1,active(X2)) -> after#(X1,X2)
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(from(X)) -> mark#(X)
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(from(X)) -> from#(mark(X))
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(from(X)) -> active#(from(mark(X)))
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(cons(X1,X2)) -> mark#(X1)
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(s(X)) -> mark#(X)
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(s(X)) -> s#(mark(X))
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(s(X)) -> active#(s(mark(X)))
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(after(X1,X2)) -> mark#(X2)
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(after(X1,X2)) -> mark#(X1)
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
    active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS)) ->
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(from(X)) -> mark#(X)
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(from(X)) -> from#(mark(X))
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(from(X)) -> active#(from(mark(X)))
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(cons(X1,X2)) -> mark#(X1)
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(s(X)) -> mark#(X)
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(s(X)) -> s#(mark(X))
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(s(X)) -> active#(s(mark(X)))
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(after(X1,X2)) -> mark#(X2)
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(after(X1,X2)) -> mark#(X1)
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
    active#(from(X)) -> mark#(cons(X,from(s(X)))) ->
    mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
    active#(from(X)) -> cons#(X,from(s(X))) ->
    cons#(mark(X1),X2) -> cons#(X1,X2)
    active#(from(X)) -> cons#(X,from(s(X))) ->
    cons#(X1,mark(X2)) -> cons#(X1,X2)
    active#(from(X)) -> cons#(X,from(s(X))) ->
    cons#(active(X1),X2) -> cons#(X1,X2)
    active#(from(X)) -> cons#(X,from(s(X))) ->
    cons#(X1,active(X2)) -> cons#(X1,X2)
    active#(from(X)) -> from#(s(X)) -> from#(mark(X)) -> from#(X)
    active#(from(X)) -> from#(s(X)) -> from#(active(X)) -> from#(X)
    active#(from(X)) -> s#(X) -> s#(mark(X)) -> s#(X)
    active#(from(X)) -> s#(X) -> s#(active(X)) -> s#(X)
   Restore Modifier:
    DPs:
     active#(from(X)) -> s#(X)
     active#(from(X)) -> from#(s(X))
     active#(from(X)) -> cons#(X,from(s(X)))
     active#(from(X)) -> mark#(cons(X,from(s(X))))
     active#(after(0(),XS)) -> mark#(XS)
     active#(after(s(N),cons(X,XS))) -> after#(N,XS)
     active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS))
     mark#(from(X)) -> mark#(X)
     mark#(from(X)) -> from#(mark(X))
     mark#(from(X)) -> active#(from(mark(X)))
     mark#(cons(X1,X2)) -> mark#(X1)
     mark#(cons(X1,X2)) -> cons#(mark(X1),X2)
     mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
     mark#(s(X)) -> mark#(X)
     mark#(s(X)) -> s#(mark(X))
     mark#(s(X)) -> active#(s(mark(X)))
     mark#(after(X1,X2)) -> mark#(X2)
     mark#(after(X1,X2)) -> mark#(X1)
     mark#(after(X1,X2)) -> after#(mark(X1),mark(X2))
     mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
     mark#(0()) -> active#(0())
     from#(mark(X)) -> from#(X)
     from#(active(X)) -> from#(X)
     cons#(mark(X1),X2) -> cons#(X1,X2)
     cons#(X1,mark(X2)) -> cons#(X1,X2)
     cons#(active(X1),X2) -> cons#(X1,X2)
     cons#(X1,active(X2)) -> cons#(X1,X2)
     s#(mark(X)) -> s#(X)
     s#(active(X)) -> s#(X)
     after#(mark(X1),X2) -> after#(X1,X2)
     after#(X1,mark(X2)) -> after#(X1,X2)
     after#(active(X1),X2) -> after#(X1,X2)
     after#(X1,active(X2)) -> after#(X1,X2)
    TRS:
     active(from(X)) -> mark(cons(X,from(s(X))))
     active(after(0(),XS)) -> mark(XS)
     active(after(s(N),cons(X,XS))) -> mark(after(N,XS))
     mark(from(X)) -> active(from(mark(X)))
     mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
     mark(s(X)) -> active(s(mark(X)))
     mark(after(X1,X2)) -> active(after(mark(X1),mark(X2)))
     mark(0()) -> active(0())
     from(mark(X)) -> from(X)
     from(active(X)) -> from(X)
     cons(mark(X1),X2) -> cons(X1,X2)
     cons(X1,mark(X2)) -> cons(X1,X2)
     cons(active(X1),X2) -> cons(X1,X2)
     cons(X1,active(X2)) -> cons(X1,X2)
     s(mark(X)) -> s(X)
     s(active(X)) -> s(X)
     after(mark(X1),X2) -> after(X1,X2)
     after(X1,mark(X2)) -> after(X1,X2)
     after(active(X1),X2) -> after(X1,X2)
     after(X1,active(X2)) -> after(X1,X2)
    SCC Processor:
     #sccs: 5
     #rules: 24
     #arcs: 202/1089
     DPs:
      mark#(after(X1,X2)) -> mark#(X2)
      mark#(after(X1,X2)) -> active#(after(mark(X1),mark(X2)))
      active#(after(s(N),cons(X,XS))) -> mark#(after(N,XS))
      mark#(after(X1,X2)) -> mark#(X1)
      mark#(s(X)) -> active#(s(mark(X)))
      active#(after(0(),XS)) -> mark#(XS)
      mark#(s(X)) -> mark#(X)
      mark#(cons(X1,X2)) -> active#(cons(mark(X1),X2))
      active#(from(X)) -> mark#(cons(X,from(s(X))))
      mark#(cons(X1,X2)) -> mark#(X1)
      mark#(from(X)) -> active#(from(mark(X)))
      mark#(from(X)) -> mark#(X)
     TRS:
      active(from(X)) -> mark(cons(X,from(s(X))))
      active(after(0(),XS)) -> mark(XS)
      active(after(s(N),cons(X,XS))) -> mark(after(N,XS))
      mark(from(X)) -> active(from(mark(X)))
      mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
      mark(s(X)) -> active(s(mark(X)))
      mark(after(X1,X2)) -> active(after(mark(X1),mark(X2)))
      mark(0()) -> active(0())
      from(mark(X)) -> from(X)
      from(active(X)) -> from(X)
      cons(mark(X1),X2) -> cons(X1,X2)
      cons(X1,mark(X2)) -> cons(X1,X2)
      cons(active(X1),X2) -> cons(X1,X2)
      cons(X1,active(X2)) -> cons(X1,X2)
      s(mark(X)) -> s(X)
      s(active(X)) -> s(X)
      after(mark(X1),X2) -> after(X1,X2)
      after(X1,mark(X2)) -> after(X1,X2)
      after(active(X1),X2) -> after(X1,X2)
      after(X1,active(X2)) -> after(X1,X2)
     Open
     
     DPs:
      from#(active(X)) -> from#(X)
      from#(mark(X)) -> from#(X)
     TRS:
      active(from(X)) -> mark(cons(X,from(s(X))))
      active(after(0(),XS)) -> mark(XS)
      active(after(s(N),cons(X,XS))) -> mark(after(N,XS))
      mark(from(X)) -> active(from(mark(X)))
      mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
      mark(s(X)) -> active(s(mark(X)))
      mark(after(X1,X2)) -> active(after(mark(X1),mark(X2)))
      mark(0()) -> active(0())
      from(mark(X)) -> from(X)
      from(active(X)) -> from(X)
      cons(mark(X1),X2) -> cons(X1,X2)
      cons(X1,mark(X2)) -> cons(X1,X2)
      cons(active(X1),X2) -> cons(X1,X2)
      cons(X1,active(X2)) -> cons(X1,X2)
      s(mark(X)) -> s(X)
      s(active(X)) -> s(X)
      after(mark(X1),X2) -> after(X1,X2)
      after(X1,mark(X2)) -> after(X1,X2)
      after(active(X1),X2) -> after(X1,X2)
      after(X1,active(X2)) -> after(X1,X2)
     Open
     
     DPs:
      cons#(X1,active(X2)) -> cons#(X1,X2)
      cons#(active(X1),X2) -> cons#(X1,X2)
      cons#(X1,mark(X2)) -> cons#(X1,X2)
      cons#(mark(X1),X2) -> cons#(X1,X2)
     TRS:
      active(from(X)) -> mark(cons(X,from(s(X))))
      active(after(0(),XS)) -> mark(XS)
      active(after(s(N),cons(X,XS))) -> mark(after(N,XS))
      mark(from(X)) -> active(from(mark(X)))
      mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
      mark(s(X)) -> active(s(mark(X)))
      mark(after(X1,X2)) -> active(after(mark(X1),mark(X2)))
      mark(0()) -> active(0())
      from(mark(X)) -> from(X)
      from(active(X)) -> from(X)
      cons(mark(X1),X2) -> cons(X1,X2)
      cons(X1,mark(X2)) -> cons(X1,X2)
      cons(active(X1),X2) -> cons(X1,X2)
      cons(X1,active(X2)) -> cons(X1,X2)
      s(mark(X)) -> s(X)
      s(active(X)) -> s(X)
      after(mark(X1),X2) -> after(X1,X2)
      after(X1,mark(X2)) -> after(X1,X2)
      after(active(X1),X2) -> after(X1,X2)
      after(X1,active(X2)) -> after(X1,X2)
     Open
     
     DPs:
      s#(active(X)) -> s#(X)
      s#(mark(X)) -> s#(X)
     TRS:
      active(from(X)) -> mark(cons(X,from(s(X))))
      active(after(0(),XS)) -> mark(XS)
      active(after(s(N),cons(X,XS))) -> mark(after(N,XS))
      mark(from(X)) -> active(from(mark(X)))
      mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
      mark(s(X)) -> active(s(mark(X)))
      mark(after(X1,X2)) -> active(after(mark(X1),mark(X2)))
      mark(0()) -> active(0())
      from(mark(X)) -> from(X)
      from(active(X)) -> from(X)
      cons(mark(X1),X2) -> cons(X1,X2)
      cons(X1,mark(X2)) -> cons(X1,X2)
      cons(active(X1),X2) -> cons(X1,X2)
      cons(X1,active(X2)) -> cons(X1,X2)
      s(mark(X)) -> s(X)
      s(active(X)) -> s(X)
      after(mark(X1),X2) -> after(X1,X2)
      after(X1,mark(X2)) -> after(X1,X2)
      after(active(X1),X2) -> after(X1,X2)
      after(X1,active(X2)) -> after(X1,X2)
     Open
     
     DPs:
      after#(mark(X1),X2) -> after#(X1,X2)
      after#(X1,active(X2)) -> after#(X1,X2)
      after#(active(X1),X2) -> after#(X1,X2)
      after#(X1,mark(X2)) -> after#(X1,X2)
     TRS:
      active(from(X)) -> mark(cons(X,from(s(X))))
      active(after(0(),XS)) -> mark(XS)
      active(after(s(N),cons(X,XS))) -> mark(after(N,XS))
      mark(from(X)) -> active(from(mark(X)))
      mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
      mark(s(X)) -> active(s(mark(X)))
      mark(after(X1,X2)) -> active(after(mark(X1),mark(X2)))
      mark(0()) -> active(0())
      from(mark(X)) -> from(X)
      from(active(X)) -> from(X)
      cons(mark(X1),X2) -> cons(X1,X2)
      cons(X1,mark(X2)) -> cons(X1,X2)
      cons(active(X1),X2) -> cons(X1,X2)
      cons(X1,active(X2)) -> cons(X1,X2)
      s(mark(X)) -> s(X)
      s(active(X)) -> s(X)
      after(mark(X1),X2) -> after(X1,X2)
      after(X1,mark(X2)) -> after(X1,X2)
      after(active(X1),X2) -> after(X1,X2)
      after(X1,active(X2)) -> after(X1,X2)
     Open