TIMEOUT We are left with following problem, upon which TcT provides the certificate TIMEOUT. Strict Trs: { exp(x, 0()) -> s(0()) , exp(x, s(y)) -> *(x, exp(x, y)) , *(0(), y) -> 0() , *(s(x), y) -> +(y, *(x, y)) , -(x, 0()) -> x , -(0(), y) -> 0() , -(s(x), s(y)) -> -(x, y) } Obligation: innermost runtime complexity Answer: TIMEOUT Computation stopped due to timeout after 10.0 seconds. Arrrr..