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