MAYBE

'Pop* with parameter subtitution (timeout of 60.0 seconds)'
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Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  f(0()) -> 1()
     , f(s(x)) -> g(f(x))
     , g(x) -> +(x, s(x))
     , f(s(x)) -> +(f(x), s(f(x)))}

Proof Output:    
  The input cannot be shown compatible