%------------------------------------------------------------------------------ % File : Moca---0.1 % Problem : GRP021-1 : TPTP v8.1.0. Released v1.0.0. % Transfm : none % Format : tptp:raw % Command : moca.sh %s % Computer : n008.cluster.edu % Model : x86_64 x86_64 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz % Memory : 8042.1875MB % OS : Linux 3.10.0-693.el7.x86_64 % CPULimit : 300s % WCLimit : 600s % DateTime : Sat Jul 16 10:51:53 EDT 2022 % Result : Unsatisfiable 1.32s 1.48s % Output : Proof 1.32s % Verified : % SZS Type : - % Comments : %------------------------------------------------------------------------------ %----WARNING: Could not form TPTP format derivation %------------------------------------------------------------------------------ %----ORIGINAL SYSTEM OUTPUT % 0.07/0.12 % Problem : GRP021-1 : TPTP v8.1.0. Released v1.0.0. % 0.07/0.13 % Command : moca.sh %s % 0.13/0.34 % Computer : n008.cluster.edu % 0.13/0.34 % Model : x86_64 x86_64 % 0.13/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz % 0.13/0.34 % Memory : 8042.1875MB % 0.13/0.34 % OS : Linux 3.10.0-693.el7.x86_64 % 0.13/0.34 % CPULimit : 300 % 0.13/0.34 % WCLimit : 600 % 0.13/0.34 % DateTime : Mon Jun 13 13:34:52 EDT 2022 % 0.13/0.34 % CPUTime : % 1.32/1.48 % SZS status Unsatisfiable % 1.32/1.48 % SZS output start Proof % 1.32/1.48 The input problem is unsatisfiable because % 1.32/1.48 % 1.32/1.48 [1] the following set of Horn clauses is unsatisfiable: % 1.32/1.48 % 1.32/1.48 product(identity, X, X) % 1.32/1.48 product(X, identity, X) % 1.32/1.48 product(inverse(X), X, identity) % 1.32/1.48 product(X, inverse(X), identity) % 1.32/1.48 product(X, Y, multiply(X, Y)) % 1.32/1.48 product(X, Y, Z) & product(X, Y, W) ==> Z = W % 1.32/1.48 product(X, Y, U) & product(Y, Z, V) & product(U, Z, W) ==> product(X, V, W) % 1.32/1.48 product(X, Y, U) & product(Y, Z, V) & product(X, V, W) ==> product(U, Z, W) % 1.32/1.48 multiply(a, inverse(a)) = identity ==> \bottom % 1.32/1.48 % 1.32/1.48 This holds because % 1.32/1.48 % 1.32/1.48 [2] the following E entails the following G (Claessen-Smallbone's transformation (2018)): % 1.32/1.48 % 1.32/1.48 E: % 1.32/1.48 f1(true__, Z, W) = Z % 1.32/1.48 f2(product(X, Y, W), X, Y, Z, W) = W % 1.32/1.48 f2(true__, X, Y, Z, W) = f1(product(X, Y, Z), Z, W) % 1.32/1.48 f3(true__, X, V, W) = product(X, V, W) % 1.32/1.48 f4(true__, X, Y, U, V, W) = f3(product(X, Y, U), X, V, W) % 1.32/1.48 f5(product(U, Z, W), Y, Z, V, X, U, W) = true__ % 1.32/1.48 f5(true__, Y, Z, V, X, U, W) = f4(product(Y, Z, V), X, Y, U, V, W) % 1.32/1.48 f6(true__, U, Z, W) = product(U, Z, W) % 1.32/1.48 f7(true__, X, Y, U, Z, W) = f6(product(X, Y, U), U, Z, W) % 1.32/1.48 f8(product(X, V, W), Y, Z, V, X, U, W) = true__ % 1.32/1.48 f8(true__, Y, Z, V, X, U, W) = f7(product(Y, Z, V), X, Y, U, Z, W) % 1.32/1.48 f9(identity) = false__ % 1.32/1.48 f9(multiply(a, inverse(a))) = true__ % 1.32/1.48 product(X, Y, multiply(X, Y)) = true__ % 1.32/1.48 product(X, identity, X) = true__ % 1.32/1.48 product(X, inverse(X), identity) = true__ % 1.32/1.48 product(identity, X, X) = true__ % 1.32/1.48 product(inverse(X), X, identity) = true__ % 1.32/1.48 G: % 1.32/1.48 true__ = false__ % 1.32/1.48 % 1.32/1.48 This holds because % 1.32/1.48 % 1.32/1.48 [3] E entails the following ordered TRS and the lhs and rhs of G join by the TRS: % 1.32/1.48 % 1.32/1.48 % 1.32/1.48 f1(f3(true__, Y0, Y1, Y3), Y3, multiply(Y0, Y1)) -> multiply(Y0, Y1) % 1.32/1.48 f1(f3(true__, Y0, inverse(Y0), Y3), Y3, identity) -> identity % 1.32/1.48 f1(f3(true__, Y2, identity, Y3), Y3, Y2) -> Y2 % 1.32/1.48 f1(f3(true__, identity, Y2, Y3), Y3, Y2) -> Y2 % 1.32/1.48 f1(true__, Z, W) -> Z % 1.32/1.48 f2(f3(true__, Y0, Y1, Y2), Y0, Y1, Y3, Y2) -> Y2 % 1.32/1.48 f2(product(X, Y, W), X, Y, Z, W) -> W % 1.32/1.48 f2(true__, X, Y, Z, W) -> f1(f3(true__, X, Y, Z), Z, W) % 1.32/1.48 f3(f3(true__, Y3, Y0, identity), Y3, identity, inverse(Y0)) -> true__ % 1.32/1.48 f3(f3(true__, Y3, Y2, identity), Y3, Y2, identity) -> true__ % 1.32/1.48 f3(f3(true__, Y3, identity, Y1), Y3, inverse(Y1), identity) -> true__ % 1.32/1.48 f3(f3(true__, Y3, identity, identity), Y3, Y2, Y2) -> true__ % 1.32/1.48 f3(f3(true__, Y3, inverse(Y1), identity), Y3, identity, Y1) -> true__ % 1.32/1.48 f3(true__, Y0, Y1, multiply(Y0, Y1)) -> true__ % 1.32/1.48 f3(true__, Y0, inverse(Y0), identity) -> true__ % 1.32/1.48 f3(true__, Y2, identity, Y2) -> true__ % 1.32/1.48 f3(true__, identity, Y2, Y2) -> true__ % 1.32/1.48 f3(true__, inverse(Y1), Y1, identity) -> true__ % 1.32/1.48 f4(f3(true__, Y3, Y2, Y4), Y5, Y3, identity, Y4, Y2) -> true__ % 1.32/1.48 f4(f3(true__, Y3, inverse(Y0), Y4), Y5, Y3, Y0, Y4, identity) -> true__ % 1.32/1.48 f4(true__, X, Y, U, V, W) -> f3(f3(true__, X, Y, U), X, V, W) % 1.32/1.48 f5(product(U, Z, W), Y, Z, V, X, U, W) -> true__ % 1.32/1.48 f5(true__, Y, Z, V, X, U, W) -> f4(f3(true__, Y, Z, V), X, Y, U, V, W) % 1.32/1.48 f6(f3(true__, Y2, identity, Y3), Y3, inverse(Y2), identity) -> true__ % 1.32/1.48 f6(f3(true__, identity, Y2, Y3), Y3, identity, Y2) -> true__ % 1.32/1.48 f6(f3(true__, identity, identity, Y3), Y3, Y2, Y2) -> true__ % 1.32/1.48 f6(f3(true__, identity, inverse(Y1), Y3), Y3, Y1, identity) -> true__ % 1.32/1.48 f6(true__, U, Z, W) -> f3(true__, U, Z, W) % 1.32/1.48 f7(f3(true__, Y3, Y4, Y2), identity, Y3, Y5, Y4, Y2) -> true__ % 1.32/1.48 f7(f3(true__, Y3, Y4, inverse(Y0)), Y0, Y3, Y5, Y4, identity) -> true__ % 1.32/1.48 f7(true__, X, Y, U, Z, W) -> f6(f3(true__, X, Y, U), U, Z, W) % 1.32/1.48 f8(product(X, V, W), Y, Z, V, X, U, W) -> true__ % 1.32/1.48 f8(true__, Y, Z, V, X, U, W) -> f7(f3(true__, Y, Z, V), X, Y, U, Z, W) % 1.32/1.48 f9(identity) -> false__ % 1.32/1.48 f9(multiply(a, inverse(a))) -> true__ % 1.32/1.48 inverse(identity) -> identity % 1.32/1.48 multiply(Y0, identity) -> Y0 % 1.32/1.48 multiply(Y0, inverse(Y0)) -> identity % 1.32/1.48 multiply(identity, Y0) -> Y0 % 1.32/1.48 product(X, V, W) -> f3(true__, X, V, W) % 1.32/1.48 true__ -> false__ % 1.32/1.48 with the LPO induced by % 1.32/1.48 a > f5 > f4 > f8 > f7 > f6 > f2 > product > f3 > f1 > inverse > identity > multiply > f9 > true__ > false__ % 1.32/1.48 % 1.32/1.48 % SZS output end Proof % 1.32/1.48 %------------------------------------------------------------------------------