MAYBE We are left with following problem, upon which TcT provides the certificate MAYBE. Strict Trs: { fact(X) -> if(zero(X), n__s(0()), n__prod(X, fact(p(X)))) , if(true(), X, Y) -> activate(X) , if(false(), X, Y) -> activate(Y) , zero(0()) -> true() , zero(s(X)) -> false() , p(s(X)) -> X , add(0(), X) -> X , add(s(X), Y) -> s(add(X, Y)) , s(X) -> n__s(X) , prod(X1, X2) -> n__prod(X1, X2) , prod(0(), X) -> 0() , prod(s(X), Y) -> add(Y, prod(X, Y)) , activate(X) -> X , activate(n__s(X)) -> s(X) , activate(n__prod(X1, X2)) -> prod(X1, X2) } Obligation: innermost runtime complexity Answer: MAYBE Arguments of following rules are not normal-forms: { zero(s(X)) -> false() , p(s(X)) -> X , add(s(X), Y) -> s(add(X, Y)) , prod(s(X), Y) -> add(Y, prod(X, Y)) } All above mentioned rules can be savely removed. We are left with following problem, upon which TcT provides the certificate MAYBE. Strict Trs: { fact(X) -> if(zero(X), n__s(0()), n__prod(X, fact(p(X)))) , if(true(), X, Y) -> activate(X) , if(false(), X, Y) -> activate(Y) , zero(0()) -> true() , add(0(), X) -> X , s(X) -> n__s(X) , prod(X1, X2) -> n__prod(X1, X2) , prod(0(), X) -> 0() , activate(X) -> X , activate(n__s(X)) -> s(X) , activate(n__prod(X1, X2)) -> prod(X1, X2) } Obligation: innermost runtime complexity Answer: MAYBE None of the processors succeeded. Details of failed attempt(s): ----------------------------- 1) 'empty' failed due to the following reason: Empty strict component of the problem is NOT empty. 2) 'Best' failed due to the following reason: None of the processors succeeded. Details of failed attempt(s): ----------------------------- 1) 'WithProblem (timeout of 60 seconds)' failed due to the following reason: Computation stopped due to timeout after 60.0 seconds. 2) 'Best' failed due to the following reason: None of the processors succeeded. Details of failed attempt(s): ----------------------------- 1) 'WithProblem (timeout of 30 seconds) (timeout of 60 seconds)' failed due to the following reason: Computation stopped due to timeout after 30.0 seconds. 2) 'Best' failed due to the following reason: None of the processors succeeded. Details of failed attempt(s): ----------------------------- 1) 'bsearch-popstar (timeout of 60 seconds)' failed due to the following reason: The input cannot be shown compatible 2) 'Polynomial Path Order (PS) (timeout of 60 seconds)' failed due to the following reason: The input cannot be shown compatible 3) 'Fastest (timeout of 5 seconds) (timeout of 60 seconds)' failed due to the following reason: None of the processors succeeded. Details of failed attempt(s): ----------------------------- 1) 'Bounds with minimal-enrichment and initial automaton 'match'' failed due to the following reason: match-boundness of the problem could not be verified. 2) 'Bounds with perSymbol-enrichment and initial automaton 'match'' failed due to the following reason: match-boundness of the problem could not be verified. Arrrr..