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:
    {  min(x, 0()) -> 0()
     , min(0(), y) -> 0()
     , min(s(x), s(y)) -> s(min(x, y))
     , max(x, 0()) -> x
     , max(0(), y) -> y
     , max(s(x), s(y)) -> s(max(x, y))
     , -(x, 0()) -> x
     , -(s(x), s(y)) -> -(x, y)
     , gcd(s(x), 0()) -> s(x)
     , gcd(0(), s(x)) -> s(x)
     , gcd(s(x), s(y)) -> gcd(-(max(x, y), min(x, y)), s(min(x, y)))}

Proof Output:    
  The input cannot be shown compatible