MAYBE

'Pop* (timeout of 60.0 seconds)'
--------------------------------
Answer:           MAYBE
Input Problem:    innermost relative runtime-complexity with respect to
  Strict 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(nil()) -> 0()
     , gcd(cons(x, nil())) -> x
     , gcd(cons(0(), y)) -> gcd(y)
     , gcd(cons(x, cons(0(), y))) -> gcd(cons(x, y))
     , gcd(cons(s(x), cons(s(y), z()))) ->
       gcd(cons(-(max(x, y), min(x, y)), cons(s(min(x, y)), z())))}
  Weak Rules: {cons(x, cons(y, z())) -> cons(y, cons(x, z()))}

Proof Output:    
  The input cannot be shown compatible