MAYBE

'epo* (timeout of 60.0 seconds)'
--------------------------------
Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  plus(0(), y) -> y
     , plus(s(x), 0()) -> s(x)
     , plus(s(x), s(y)) -> s(plus(s(x), plus(y, 0())))}

Proof Output:    
  The input cannot be shown compatible