YES proof of /export/starexec/sandbox/benchmark/theBenchmark.xml # AProVE Commit ID: 794c25de1cacf0d048858bcd21c9a779e1221865 marcel 20200619 unpublished dirty Termination w.r.t. Q of the given QTRS could be proven: (0) QTRS (1) DependencyPairsProof [EQUIVALENT, 0 ms] (2) QDP (3) DependencyGraphProof [EQUIVALENT, 0 ms] (4) QDP (5) UsableRulesProof [EQUIVALENT, 0 ms] (6) QDP (7) QReductionProof [EQUIVALENT, 0 ms] (8) QDP (9) QDPSizeChangeProof [EQUIVALENT, 0 ms] (10) YES ---------------------------------------- (0) Obligation: Q restricted rewrite system: The TRS R consists of the following rules: f(0, 1, g(x, y), z) -> f(g(x, y), g(x, y), g(x, y), h(x)) g(0, 1) -> 0 g(0, 1) -> 1 h(g(x, y)) -> h(x) The set Q consists of the following terms: f(0, 1, g(x0, x1), x2) g(0, 1) h(g(x0, x1)) ---------------------------------------- (1) DependencyPairsProof (EQUIVALENT) Using Dependency Pairs [AG00,LPAR04] we result in the following initial DP problem. ---------------------------------------- (2) Obligation: Q DP problem: The TRS P consists of the following rules: F(0, 1, g(x, y), z) -> F(g(x, y), g(x, y), g(x, y), h(x)) F(0, 1, g(x, y), z) -> H(x) H(g(x, y)) -> H(x) The TRS R consists of the following rules: f(0, 1, g(x, y), z) -> f(g(x, y), g(x, y), g(x, y), h(x)) g(0, 1) -> 0 g(0, 1) -> 1 h(g(x, y)) -> h(x) The set Q consists of the following terms: f(0, 1, g(x0, x1), x2) g(0, 1) h(g(x0, x1)) We have to consider all minimal (P,Q,R)-chains. ---------------------------------------- (3) DependencyGraphProof (EQUIVALENT) The approximation of the Dependency Graph [LPAR04,FROCOS05,EDGSTAR] contains 1 SCC with 2 less nodes. ---------------------------------------- (4) Obligation: Q DP problem: The TRS P consists of the following rules: H(g(x, y)) -> H(x) The TRS R consists of the following rules: f(0, 1, g(x, y), z) -> f(g(x, y), g(x, y), g(x, y), h(x)) g(0, 1) -> 0 g(0, 1) -> 1 h(g(x, y)) -> h(x) The set Q consists of the following terms: f(0, 1, g(x0, x1), x2) g(0, 1) h(g(x0, x1)) We have to consider all minimal (P,Q,R)-chains. ---------------------------------------- (5) UsableRulesProof (EQUIVALENT) As all Q-normal forms are R-normal forms we are in the innermost case. Hence, by the usable rules processor [LPAR04] we can delete all non-usable rules [FROCOS05] from R. ---------------------------------------- (6) Obligation: Q DP problem: The TRS P consists of the following rules: H(g(x, y)) -> H(x) R is empty. The set Q consists of the following terms: f(0, 1, g(x0, x1), x2) g(0, 1) h(g(x0, x1)) We have to consider all minimal (P,Q,R)-chains. ---------------------------------------- (7) QReductionProof (EQUIVALENT) We deleted the following terms from Q as each root-symbol of these terms does neither occur in P nor in R.[THIEMANN]. f(0, 1, g(x0, x1), x2) h(g(x0, x1)) ---------------------------------------- (8) Obligation: Q DP problem: The TRS P consists of the following rules: H(g(x, y)) -> H(x) R is empty. The set Q consists of the following terms: g(0, 1) We have to consider all minimal (P,Q,R)-chains. ---------------------------------------- (9) QDPSizeChangeProof (EQUIVALENT) By using the subterm criterion [SUBTERM_CRITERION] together with the size-change analysis [AAECC05] we have proven that there are no infinite chains for this DP problem. From the DPs we obtained the following set of size-change graphs: *H(g(x, y)) -> H(x) The graph contains the following edges 1 > 1 ---------------------------------------- (10) YES