MAYBE

'Pop* with parameter subtitution (timeout of 60.0 seconds)'
-----------------------------------------------------------
Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  rev(nil()) -> nil()
     , rev(cons(x, l)) -> cons(rev1(x, l), rev2(x, l))
     , rev1(0(), nil()) -> 0()
     , rev1(s(x), nil()) -> s(x)
     , rev1(x, cons(y, l)) -> rev1(y, l)
     , rev2(x, nil()) -> nil()
     , rev2(x, cons(y, l)) -> rev(cons(x, rev2(y, l)))}

Proof Output:    
  The input cannot be shown compatible