MAYBE 'Pop* (timeout of 60.0 seconds)' -------------------------------- Answer: MAYBE Input Problem: innermost runtime-complexity with respect to Rules: { rev(nil()) -> nil() , rev(++(x, y)) -> ++(rev1(x, y), rev2(x, y)) , rev1(x, nil()) -> x , rev1(x, ++(y, z)) -> rev1(y, z) , rev2(x, nil()) -> nil() , rev2(x, ++(y, z)) -> rev(++(x, rev(rev2(y, z))))} Proof Output: The input cannot be shown compatible