%------------------------------------------------------------------------------ % File : Moca---0.1 % Problem : GRP023-2 : TPTP v8.1.0. Released v1.0.0. % Transfm : none % Format : tptp:raw % Command : moca.sh %s % Computer : n022.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 10:51:54 EDT 2022 % Result : Unsatisfiable 0.21s 0.41s % Output : Proof 0.21s % Verified : % SZS Type : - % Comments : %------------------------------------------------------------------------------ %----WARNING: Could not form TPTP format derivation %------------------------------------------------------------------------------ %----ORIGINAL SYSTEM OUTPUT % 0.04/0.13 % Problem : GRP023-2 : TPTP v8.1.0. Released v1.0.0. % 0.04/0.14 % Command : moca.sh %s % 0.14/0.35 % Computer : n022.cluster.edu % 0.14/0.35 % Model : x86_64 x86_64 % 0.14/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz % 0.14/0.35 % Memory : 8042.1875MB % 0.14/0.35 % OS : Linux 3.10.0-693.el7.x86_64 % 0.14/0.35 % CPULimit : 300 % 0.14/0.35 % WCLimit : 600 % 0.14/0.35 % DateTime : Mon Jun 13 18:00:18 EDT 2022 % 0.14/0.36 % CPUTime : % 0.21/0.41 % SZS status Unsatisfiable % 0.21/0.41 % SZS output start Proof % 0.21/0.41 The input problem is unsatisfiable because % 0.21/0.41 % 0.21/0.41 [1] the following set of Horn clauses is unsatisfiable: % 0.21/0.41 % 0.21/0.41 multiply(identity, X) = X % 0.21/0.41 multiply(inverse(X), X) = identity % 0.21/0.41 multiply(multiply(X, Y), Z) = multiply(X, multiply(Y, Z)) % 0.21/0.41 multiply(X, identity) = X % 0.21/0.41 multiply(X, inverse(X)) = identity % 0.21/0.41 inverse(identity) = identity ==> \bottom % 0.21/0.41 % 0.21/0.41 This holds because % 0.21/0.41 % 0.21/0.41 [2] the following E entails the following G (Claessen-Smallbone's transformation (2018)): % 0.21/0.41 % 0.21/0.41 E: % 0.21/0.41 f1(identity) = false__ % 0.21/0.41 f1(inverse(identity)) = true__ % 0.21/0.41 multiply(X, identity) = X % 0.21/0.41 multiply(X, inverse(X)) = identity % 0.21/0.41 multiply(identity, X) = X % 0.21/0.41 multiply(inverse(X), X) = identity % 0.21/0.41 multiply(multiply(X, Y), Z) = multiply(X, multiply(Y, Z)) % 0.21/0.41 G: % 0.21/0.41 true__ = false__ % 0.21/0.41 % 0.21/0.41 This holds because % 0.21/0.41 % 0.21/0.41 [3] E entails the following ordered TRS and the lhs and rhs of G join by the TRS: % 0.21/0.41 % 0.21/0.41 % 0.21/0.41 f1(identity) -> false__ % 0.21/0.41 f1(inverse(identity)) -> true__ % 0.21/0.41 inverse(identity) -> identity % 0.21/0.41 inverse(inverse(Y1)) -> Y1 % 0.21/0.41 multiply(X, identity) -> X % 0.21/0.41 multiply(X, inverse(X)) -> identity % 0.21/0.41 multiply(X1, inverse(multiply(Y0, X1))) -> inverse(Y0) % 0.21/0.41 multiply(X1, inverse(multiply(inverse(Y0), X1))) -> Y0 % 0.21/0.41 multiply(Y0, multiply(Y1, inverse(multiply(Y0, Y1)))) -> identity % 0.21/0.41 multiply(Y0, multiply(Y1, multiply(inverse(multiply(Y0, Y1)), X1))) -> X1 % 0.21/0.41 multiply(Y0, multiply(inverse(Y0), Y2)) -> Y2 % 0.21/0.41 multiply(identity, X) -> X % 0.21/0.41 multiply(inverse(X), X) -> identity % 0.21/0.41 multiply(inverse(Y1), multiply(Y1, Y2)) -> Y2 % 0.21/0.41 multiply(inverse(inverse(X0)), X1) -> multiply(X0, X1) % 0.21/0.41 multiply(inverse(multiply(X0, X1)), multiply(X0, multiply(X1, Y1))) -> Y1 % 0.21/0.41 multiply(multiply(X, Y), Z) -> multiply(X, multiply(Y, Z)) % 0.21/0.41 true__ -> false__ % 0.21/0.41 with the LPO induced by % 0.21/0.41 f1 > inverse > identity > multiply > true__ > false__ % 0.21/0.41 % 0.21/0.41 % SZS output end Proof % 0.21/0.41 %------------------------------------------------------------------------------