2.45/1.26 NO 2.45/1.27 proof of /export/starexec/sandbox2/benchmark/theBenchmark.xml 2.45/1.27 # AProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty 2.45/1.27 2.45/1.27 2.45/1.27 Outermost Termination of the given OTRS could be disproven: 2.45/1.27 2.45/1.27 (0) OTRS 2.45/1.27 (1) OutermostNonTerminationProof [COMPLETE, 0 ms] 2.45/1.27 (2) NO 2.45/1.27 2.45/1.27 2.45/1.27 ---------------------------------------- 2.45/1.27 2.45/1.27 (0) 2.45/1.27 Obligation: 2.45/1.27 Term rewrite system R: 2.45/1.27 The TRS R consists of the following rules: 2.45/1.27 2.45/1.27 U11(tt) -> U12(splitAt(N, XS)) 2.45/1.27 U12(pair(YS, ZS)) -> pair(cons(X), ZS) 2.45/1.27 and(tt) -> X 2.45/1.27 tail(cons(N)) -> XS 2.45/1.27 afterNth(N, XS) -> snd(splitAt(N, XS)) 2.45/1.27 fst(pair(X, Y)) -> X 2.45/1.27 head(cons(N)) -> N 2.45/1.27 natsFrom(N) -> cons(N) 2.45/1.27 sel(N, XS) -> head(afterNth(N, XS)) 2.45/1.27 snd(pair(X, Y)) -> Y 2.45/1.27 splitAt(0, XS) -> pair(nil, XS) 2.45/1.27 splitAt(s(N), cons(X)) -> U11(tt) 2.45/1.27 take(N, XS) -> fst(splitAt(N, XS)) 2.45/1.27 2.45/1.27 2.45/1.27 2.45/1.27 Outermost Strategy. 2.45/1.27 2.45/1.27 ---------------------------------------- 2.45/1.27 2.45/1.27 (1) OutermostNonTerminationProof (COMPLETE) 2.45/1.27 Term rewrite system R: 2.45/1.27 The TRS R consists of the following rules: 2.45/1.27 2.45/1.27 U11(tt) -> U12(splitAt(N, XS)) 2.45/1.27 U12(pair(YS, ZS)) -> pair(cons(X), ZS) 2.45/1.27 and(tt) -> X 2.45/1.27 tail(cons(N)) -> XS 2.45/1.27 afterNth(N, XS) -> snd(splitAt(N, XS)) 2.45/1.27 fst(pair(X, Y)) -> X 2.45/1.27 head(cons(N)) -> N 2.45/1.27 natsFrom(N) -> cons(N) 2.45/1.27 sel(N, XS) -> head(afterNth(N, XS)) 2.45/1.27 snd(pair(X, Y)) -> Y 2.45/1.27 splitAt(0, XS) -> pair(nil, XS) 2.45/1.27 splitAt(s(N), cons(X)) -> U11(tt) 2.45/1.27 take(N, XS) -> fst(splitAt(N, XS)) 2.45/1.27 2.45/1.27 2.45/1.27 2.45/1.27 Outermost Strategy. 2.45/1.27 2.45/1.27 ---------- Loop: ---------- 2.45/1.27 2.45/1.27 U11(tt) -> U12(splitAt(U11(tt), U11(tt))) with rule U11(tt) -> U12(splitAt(N, XS)) at position [] and matcher [N / U11(tt), XS / U11(tt)] 2.45/1.27 2.45/1.27 Now an instance of the first term with Matcher [ ] occurs in the last term at position [0,0]. 2.45/1.27 2.45/1.27 Context: U12(splitAt([], U11(tt))) 2.45/1.27 2.45/1.27 We used [THIEMANN_LOOPS_UNDER_STRATEGIES] to show that this Loop is an Outermost-Loop. 2.45/1.27 ---------------------------------------- 2.45/1.27 2.45/1.27 (2) 2.45/1.27 NO 2.69/1.30 EOF