MAYBE

'Pop* (timeout of 60.0 seconds)'
--------------------------------
Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  a(x1) -> b(x1)
     , a(b(b(c(x1)))) -> c(c(a(a(a(a(x1))))))}

Proof Output:    
  The input cannot be shown compatible