%------------------------------------------------------------------------------ % File : Moca---0.1 % Problem : GRP496-1 : TPTP v8.1.0. Released v2.6.0. % Transfm : none % Format : tptp:raw % Command : moca.sh %s % Computer : n017.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 10:55:50 EDT 2022 % Result : Unsatisfiable 1.25s 1.36s % Output : Proof 1.25s % Verified : % SZS Type : - % Comments : %------------------------------------------------------------------------------ %----WARNING: Could not form TPTP format derivation %------------------------------------------------------------------------------ %----ORIGINAL SYSTEM OUTPUT % 0.03/0.13 % Problem : GRP496-1 : TPTP v8.1.0. Released v2.6.0. % 0.03/0.14 % Command : moca.sh %s % 0.13/0.35 % Computer : n017.cluster.edu % 0.13/0.35 % Model : x86_64 x86_64 % 0.13/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz % 0.13/0.35 % Memory : 8042.1875MB % 0.13/0.35 % OS : Linux 3.10.0-693.el7.x86_64 % 0.13/0.35 % CPULimit : 300 % 0.13/0.35 % WCLimit : 600 % 0.13/0.35 % DateTime : Mon Jun 13 21:10:23 EDT 2022 % 0.13/0.35 % CPUTime : % 1.25/1.36 % SZS status Unsatisfiable % 1.25/1.36 % SZS output start Proof % 1.25/1.36 The input problem is unsatisfiable because % 1.25/1.36 % 1.25/1.36 [1] the following set of Horn clauses is unsatisfiable: % 1.25/1.36 % 1.25/1.36 double_divide(double_divide(identity, double_divide(A, double_divide(B, identity))), double_divide(double_divide(B, double_divide(C, A)), identity)) = C % 1.25/1.36 multiply(A, B) = double_divide(double_divide(B, A), identity) % 1.25/1.36 inverse(A) = double_divide(A, identity) % 1.25/1.36 identity = double_divide(A, inverse(A)) % 1.25/1.36 multiply(inverse(a1), a1) = identity ==> \bottom % 1.25/1.36 % 1.25/1.36 This holds because % 1.25/1.36 % 1.25/1.36 [2] the following E entails the following G (Claessen-Smallbone's transformation (2018)): % 1.25/1.36 % 1.25/1.36 E: % 1.25/1.36 double_divide(double_divide(identity, double_divide(A, double_divide(B, identity))), double_divide(double_divide(B, double_divide(C, A)), identity)) = C % 1.25/1.36 f1(identity) = false__ % 1.25/1.36 f1(multiply(inverse(a1), a1)) = true__ % 1.25/1.36 identity = double_divide(A, inverse(A)) % 1.25/1.36 inverse(A) = double_divide(A, identity) % 1.25/1.36 multiply(A, B) = double_divide(double_divide(B, A), identity) % 1.25/1.36 G: % 1.25/1.36 true__ = false__ % 1.25/1.36 % 1.25/1.36 This holds because % 1.25/1.36 % 1.25/1.36 [3] E entails the following ordered TRS and the lhs and rhs of G join by the TRS: % 1.25/1.36 % 1.25/1.36 double_divide(double_divide(identity, double_divide(identity, inverse(double_divide(identity, double_divide(X0, inverse(X1)))))), inverse(X2)) = double_divide(X1, double_divide(X2, X0)) % 1.25/1.36 double_divide(A, identity) -> inverse(A) % 1.25/1.36 double_divide(A, inverse(A)) -> identity % 1.25/1.36 double_divide(Y1, double_divide(double_divide(identity, double_divide(identity, inverse(double_divide(identity, double_divide(Y0, inverse(Y1)))))), Y0)) -> identity % 1.25/1.36 double_divide(double_divide(identity, X2), inverse(double_divide(double_divide(X1, double_divide(X2, X0)), double_divide(Y2, double_divide(identity, double_divide(X0, inverse(X1))))))) -> Y2 % 1.25/1.36 double_divide(double_divide(identity, double_divide(A, double_divide(B, identity))), double_divide(double_divide(B, double_divide(C, A)), identity)) -> C % 1.25/1.36 double_divide(double_divide(identity, double_divide(Y0, inverse(Y1))), inverse(double_divide(Y1, double_divide(Y2, Y0)))) -> Y2 % 1.25/1.36 double_divide(double_divide(identity, double_divide(identity, inverse(Y1))), inverse(double_divide(Y1, inverse(Y2)))) -> Y2 % 1.25/1.36 double_divide(double_divide(identity, double_divide(identity, inverse(Y1))), inverse(identity)) -> Y1 % 1.25/1.36 double_divide(double_divide(identity, double_divide(identity, inverse(Y1))), inverse(inverse(Y1))) -> identity % 1.25/1.36 double_divide(double_divide(identity, double_divide(identity, inverse(double_divide(identity, double_divide(identity, inverse(Y0)))))), inverse(Y1)) -> double_divide(Y0, inverse(Y1)) % 1.25/1.36 double_divide(double_divide(identity, double_divide(inverse(Y2), inverse(Y1))), inverse(inverse(Y1))) -> Y2 % 1.25/1.36 double_divide(double_divide(identity, double_divide(inverse(double_divide(X1, double_divide(X2, X0))), inverse(Y1))), inverse(double_divide(Y1, X2))) -> double_divide(identity, double_divide(X0, inverse(X1))) % 1.25/1.36 double_divide(identity, inverse(double_divide(Y0, double_divide(Y1, Y0)))) -> Y1 % 1.25/1.36 double_divide(identity, inverse(double_divide(identity, inverse(Y0)))) -> Y0 % 1.25/1.36 double_divide(identity, inverse(inverse(inverse(Y0)))) -> Y0 % 1.25/1.36 double_divide(inverse(identity), inverse(double_divide(Y1, double_divide(Y2, Y1)))) -> Y2 % 1.25/1.36 double_divide(inverse(identity), inverse(double_divide(identity, inverse(Y1)))) -> Y1 % 1.25/1.36 double_divide(inverse(identity), inverse(inverse(inverse(Y0)))) -> Y0 % 1.25/1.36 f1(identity) -> false__ % 1.25/1.36 f1(inverse(identity)) -> true__ % 1.25/1.36 f1(multiply(inverse(a1), a1)) -> true__ % 1.25/1.36 inverse(double_divide(identity, double_divide(identity, inverse(Y0)))) -> Y0 % 1.25/1.36 inverse(double_divide(identity, inverse(inverse(Y0)))) -> Y0 % 1.25/1.36 inverse(identity) -> identity % 1.25/1.36 multiply(A, B) -> double_divide(double_divide(B, A), identity) % 1.25/1.36 true__ -> false__ % 1.25/1.36 with the LPO induced by % 1.25/1.36 a1 > f1 > multiply > double_divide > inverse > identity > true__ > false__ % 1.25/1.36 % 1.25/1.36 % SZS output end Proof % 1.25/1.36 %------------------------------------------------------------------------------