MAYBE

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

Proof Output:    
  The input cannot be shown compatible