MAYBE We are left with following problem, upon which TcT provides the certificate MAYBE. Strict Trs: { a__terms(N) -> cons(recip(a__sqr(mark(N))), terms(s(N))) , a__terms(X) -> terms(X) , a__sqr(X) -> sqr(X) , a__sqr(s(X)) -> s(a__add(a__sqr(mark(X)), a__dbl(mark(X)))) , a__sqr(0()) -> 0() , mark(cons(X1, X2)) -> cons(mark(X1), X2) , mark(recip(X)) -> recip(mark(X)) , mark(terms(X)) -> a__terms(mark(X)) , mark(s(X)) -> s(mark(X)) , mark(0()) -> 0() , mark(nil()) -> nil() , mark(first(X1, X2)) -> a__first(mark(X1), mark(X2)) , mark(dbl(X)) -> a__dbl(mark(X)) , mark(sqr(X)) -> a__sqr(mark(X)) , mark(add(X1, X2)) -> a__add(mark(X1), mark(X2)) , mark(half(X)) -> a__half(mark(X)) , a__add(X1, X2) -> add(X1, X2) , a__add(s(X), Y) -> s(a__add(mark(X), mark(Y))) , a__add(0(), X) -> mark(X) , a__dbl(X) -> dbl(X) , a__dbl(s(X)) -> s(s(a__dbl(mark(X)))) , a__dbl(0()) -> 0() , a__first(X1, X2) -> first(X1, X2) , a__first(s(X), cons(Y, Z)) -> cons(mark(Y), first(X, Z)) , a__first(0(), X) -> nil() , a__half(X) -> half(X) , a__half(s(s(X))) -> s(a__half(mark(X))) , a__half(s(0())) -> 0() , a__half(0()) -> 0() , a__half(dbl(X)) -> mark(X) } 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 perSymbol-enrichment and initial automaton 'match'' failed due to the following reason: match-boundness of the problem could not be verified. 2) 'Bounds with minimal-enrichment and initial automaton 'match'' failed due to the following reason: match-boundness of the problem could not be verified. Arrrr..