MAYBE

'epo* (timeout of 60.0 seconds)'
--------------------------------
Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  sqr(0()) -> 0()
     , sqr(s(x)) -> +(sqr(x), s(double(x)))
     , double(0()) -> 0()
     , double(s(x)) -> s(s(double(x)))
     , +(x, 0()) -> x
     , +(x, s(y)) -> s(+(x, y))
     , sqr(s(x)) -> s(+(sqr(x), double(x)))}

Proof Output:    
  The input cannot be shown compatible