MAYBE

'Pop* (timeout of 60.0 seconds)'
--------------------------------
Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  f(empty(), l) -> l
     , f(cons(x, k), l) -> g(k, l, cons(x, k))
     , g(a, b, c) -> f(a, cons(b, c))}

Proof Output:    
  The input cannot be shown compatible