22.29/6.64 YES 22.41/6.66 proof of /export/starexec/sandbox2/benchmark/theBenchmark.xml 22.41/6.66 # AProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty 22.41/6.66 22.41/6.66 22.41/6.66 Termination w.r.t. Q of the given QTRS could be proven: 22.41/6.66 22.41/6.66 (0) QTRS 22.41/6.66 (1) DependencyPairsProof [EQUIVALENT, 27 ms] 22.41/6.66 (2) QDP 22.41/6.66 (3) QDPOrderProof [EQUIVALENT, 132 ms] 22.41/6.66 (4) QDP 22.41/6.66 (5) QDPOrderProof [EQUIVALENT, 0 ms] 22.41/6.66 (6) QDP 22.41/6.66 (7) PisEmptyProof [EQUIVALENT, 0 ms] 22.41/6.66 (8) YES 22.41/6.66 22.41/6.66 22.41/6.66 ---------------------------------------- 22.41/6.66 22.41/6.66 (0) 22.41/6.66 Obligation: 22.41/6.66 Q restricted rewrite system: 22.41/6.66 The TRS R consists of the following rules: 22.41/6.66 22.41/6.66 a(a(x1)) -> x1 22.41/6.66 a(b(b(b(x1)))) -> b(b(b(a(b(a(x1)))))) 22.41/6.66 22.41/6.66 Q is empty. 22.41/6.66 22.41/6.66 ---------------------------------------- 22.41/6.66 22.41/6.66 (1) DependencyPairsProof (EQUIVALENT) 22.41/6.66 Using Dependency Pairs [AG00,LPAR04] we result in the following initial DP problem. 22.41/6.66 ---------------------------------------- 22.41/6.66 22.41/6.66 (2) 22.41/6.66 Obligation: 22.41/6.66 Q DP problem: 22.41/6.66 The TRS P consists of the following rules: 22.41/6.66 22.41/6.66 A(b(b(b(x1)))) -> A(b(a(x1))) 22.41/6.66 A(b(b(b(x1)))) -> A(x1) 22.41/6.66 22.41/6.66 The TRS R consists of the following rules: 22.41/6.66 22.41/6.66 a(a(x1)) -> x1 22.41/6.66 a(b(b(b(x1)))) -> b(b(b(a(b(a(x1)))))) 22.41/6.66 22.41/6.66 Q is empty. 22.41/6.66 We have to consider all minimal (P,Q,R)-chains. 22.41/6.66 ---------------------------------------- 22.41/6.66 22.41/6.66 (3) QDPOrderProof (EQUIVALENT) 22.41/6.66 We use the reduction pair processor [LPAR04,JAR06]. 22.41/6.66 22.41/6.66 22.41/6.66 The following pairs can be oriented strictly and are deleted. 22.41/6.66 22.41/6.66 A(b(b(b(x1)))) -> A(x1) 22.41/6.66 The remaining pairs can at least be oriented weakly. 22.41/6.66 Used ordering: Matrix interpretation [MATRO] with arctic natural numbers [ARCTIC]: 22.41/6.66 22.41/6.66 <<< 22.41/6.66 POL(A(x_1)) = [[0A]] + [[0A, 0A, 0A]] * x_1 22.41/6.66 >>> 22.41/6.66 22.41/6.66 <<< 22.41/6.66 POL(b(x_1)) = [[0A], [0A], [0A]] + [[-I, 0A, 0A], [0A, -I, -I], [0A, 1A, -I]] * x_1 22.41/6.66 >>> 22.41/6.66 22.41/6.66 <<< 22.41/6.66 POL(a(x_1)) = [[0A], [0A], [0A]] + [[1A, 0A, 0A], [0A, -I, -I], [0A, -I, -I]] * x_1 22.41/6.66 >>> 22.41/6.66 22.41/6.66 22.41/6.66 The following usable rules [FROCOS05] with respect to the argument filtering of the ordering [JAR06] were oriented: 22.41/6.66 22.41/6.66 a(a(x1)) -> x1 22.41/6.66 a(b(b(b(x1)))) -> b(b(b(a(b(a(x1)))))) 22.41/6.66 22.41/6.66 22.41/6.66 ---------------------------------------- 22.41/6.66 22.41/6.66 (4) 22.41/6.66 Obligation: 22.41/6.66 Q DP problem: 22.41/6.66 The TRS P consists of the following rules: 22.41/6.66 22.41/6.66 A(b(b(b(x1)))) -> A(b(a(x1))) 22.41/6.66 22.41/6.66 The TRS R consists of the following rules: 22.41/6.66 22.41/6.66 a(a(x1)) -> x1 22.41/6.66 a(b(b(b(x1)))) -> b(b(b(a(b(a(x1)))))) 22.41/6.66 22.41/6.66 Q is empty. 22.41/6.66 We have to consider all minimal (P,Q,R)-chains. 22.41/6.66 ---------------------------------------- 22.41/6.66 22.41/6.66 (5) QDPOrderProof (EQUIVALENT) 22.41/6.66 We use the reduction pair processor [LPAR04,JAR06]. 22.41/6.66 22.41/6.66 22.41/6.66 The following pairs can be oriented strictly and are deleted. 22.41/6.66 22.41/6.66 A(b(b(b(x1)))) -> A(b(a(x1))) 22.41/6.66 The remaining pairs can at least be oriented weakly. 22.41/6.66 Used ordering: Matrix interpretation [MATRO] with arctic natural numbers [ARCTIC]: 22.41/6.66 22.41/6.66 <<< 22.41/6.66 POL(A(x_1)) = [[-I]] + [[0A, 0A, 1A]] * x_1 22.41/6.66 >>> 22.41/6.66 22.41/6.66 <<< 22.41/6.66 POL(b(x_1)) = [[0A], [0A], [0A]] + [[-I, 1A, 0A], [-I, -I, 0A], [0A, 0A, -I]] * x_1 22.41/6.66 >>> 22.41/6.66 22.41/6.66 <<< 22.41/6.66 POL(a(x_1)) = [[0A], [0A], [0A]] + [[-I, -I, 0A], [-I, -I, 0A], [0A, 0A, 1A]] * x_1 22.41/6.66 >>> 22.41/6.66 22.41/6.66 22.41/6.66 The following usable rules [FROCOS05] with respect to the argument filtering of the ordering [JAR06] were oriented: 22.41/6.66 22.41/6.66 a(a(x1)) -> x1 22.41/6.66 a(b(b(b(x1)))) -> b(b(b(a(b(a(x1)))))) 22.41/6.66 22.41/6.66 22.41/6.66 ---------------------------------------- 22.41/6.66 22.41/6.66 (6) 22.41/6.66 Obligation: 22.41/6.66 Q DP problem: 22.41/6.66 P is empty. 22.41/6.66 The TRS R consists of the following rules: 22.41/6.66 22.41/6.66 a(a(x1)) -> x1 22.41/6.66 a(b(b(b(x1)))) -> b(b(b(a(b(a(x1)))))) 22.41/6.66 22.41/6.66 Q is empty. 22.41/6.66 We have to consider all minimal (P,Q,R)-chains. 22.41/6.66 ---------------------------------------- 22.41/6.66 22.41/6.66 (7) PisEmptyProof (EQUIVALENT) 22.41/6.66 The TRS P is empty. Hence, there is no (P,Q,R) chain. 22.41/6.66 ---------------------------------------- 22.41/6.66 22.41/6.66 (8) 22.41/6.66 YES 22.41/6.70 EOF