MAYBE

'epo* (timeout of 60.0 seconds)'
--------------------------------
Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  incr(nil()) -> nil()
     , incr(cons(X, L)) -> cons(s(X), n__incr(activate(L)))
     , adx(nil()) -> nil()
     , adx(cons(X, L)) -> incr(cons(X, n__adx(activate(L))))
     , nats() -> adx(zeros())
     , zeros() -> cons(0(), n__zeros())
     , head(cons(X, L)) -> X
     , tail(cons(X, L)) -> activate(L)
     , incr(X) -> n__incr(X)
     , adx(X) -> n__adx(X)
     , zeros() -> n__zeros()
     , activate(n__incr(X)) -> incr(activate(X))
     , activate(n__adx(X)) -> adx(activate(X))
     , activate(n__zeros()) -> zeros()
     , activate(X) -> X}

Proof Output:    
  The input cannot be shown compatible