MAYBE

'Pop* (timeout of 60.0 seconds)'
--------------------------------
Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  +(X, 0()) -> X
     , +(X, s(Y)) -> s(+(X, Y))
     , f(0(), s(0()), X) -> f(X, +(X, X), X)
     , g(X, Y) -> X
     , g(X, Y) -> Y}

Proof Output:    
  The input cannot be shown compatible
The following warning(s) occured:

 Warning when parsing problem:
   Unsupported strategy 'OUTERMOST'