YES(?,POLY) 'Pop* with parameter subtitution (timeout of 60.0 seconds)' ----------------------------------------------------------- Answer: YES(?,POLY) Input Problem: innermost runtime-complexity with respect to Rules: {f(X) -> g()} Proof Output: The input was oriented with the instance of POP* as induced by the precedence empty and safe mapping safe(f) = {}, safe(g) = {} . For your convenience, here is the input in predicative notation: Rules: {f(X;) -> g()}