MAYBE We are left with following problem, upon which TcT provides the certificate MAYBE. Strict Trs: { f(0(), 1(), X) -> h(X, X) , h(0(), X) -> f(0(), X, X) , g(X, Y) -> X , g(X, Y) -> Y } Obligation: innermost runtime complexity Answer: MAYBE The input cannot be shown compatible Arrrr..