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