MAYBE 'Pop* with parameter subtitution (timeout of 60.0 seconds)' ----------------------------------------------------------- Answer: MAYBE Input Problem: innermost runtime-complexity with respect to Rules: { a__nats() -> cons(0(), incr(nats())) , a__pairs() -> cons(0(), incr(odds())) , a__odds() -> a__incr(a__pairs()) , a__incr(cons(X, XS)) -> cons(s(mark(X)), incr(XS)) , a__head(cons(X, XS)) -> mark(X) , a__tail(cons(X, XS)) -> mark(XS) , mark(nats()) -> a__nats() , mark(incr(X)) -> a__incr(mark(X)) , mark(pairs()) -> a__pairs() , mark(odds()) -> a__odds() , mark(head(X)) -> a__head(mark(X)) , mark(tail(X)) -> a__tail(mark(X)) , mark(cons(X1, X2)) -> cons(mark(X1), X2) , mark(0()) -> 0() , mark(s(X)) -> s(mark(X)) , a__nats() -> nats() , a__incr(X) -> incr(X) , a__pairs() -> pairs() , a__odds() -> odds() , a__head(X) -> head(X) , a__tail(X) -> tail(X)} Proof Output: The input cannot be shown compatible