%------------------------------------------------------------------------------ % File : Moca---0.1 % Problem : GRP168-2 : TPTP v8.1.0. Bugfixed v1.2.1. % Transfm : none % Format : tptp:raw % Command : moca.sh %s % Computer : n021.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 10:53:38 EDT 2022 % Result : Unsatisfiable 1.44s 1.55s % Output : Proof 1.44s % Verified : % SZS Type : - % Comments : %------------------------------------------------------------------------------ %----WARNING: Could not form TPTP format derivation %------------------------------------------------------------------------------ %----ORIGINAL SYSTEM OUTPUT % 0.00/0.12 % Problem : GRP168-2 : TPTP v8.1.0. Bugfixed v1.2.1. % 0.12/0.13 % Command : moca.sh %s % 0.12/0.34 % Computer : n021.cluster.edu % 0.12/0.34 % Model : x86_64 x86_64 % 0.12/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz % 0.12/0.34 % Memory : 8042.1875MB % 0.12/0.34 % OS : Linux 3.10.0-693.el7.x86_64 % 0.12/0.34 % CPULimit : 300 % 0.12/0.34 % WCLimit : 600 % 0.12/0.34 % DateTime : Mon Jun 13 18:36:42 EDT 2022 % 0.12/0.34 % CPUTime : % 1.44/1.55 % SZS status Unsatisfiable % 1.44/1.55 % SZS output start Proof % 1.44/1.55 The input problem is unsatisfiable because % 1.44/1.55 % 1.44/1.55 [1] the following set of Horn clauses is unsatisfiable: % 1.44/1.55 % 1.44/1.55 multiply(identity, X) = X % 1.44/1.55 multiply(inverse(X), X) = identity % 1.44/1.55 multiply(multiply(X, Y), Z) = multiply(X, multiply(Y, Z)) % 1.44/1.55 greatest_lower_bound(X, Y) = greatest_lower_bound(Y, X) % 1.44/1.55 least_upper_bound(X, Y) = least_upper_bound(Y, X) % 1.44/1.55 greatest_lower_bound(X, greatest_lower_bound(Y, Z)) = greatest_lower_bound(greatest_lower_bound(X, Y), Z) % 1.44/1.55 least_upper_bound(X, least_upper_bound(Y, Z)) = least_upper_bound(least_upper_bound(X, Y), Z) % 1.44/1.55 least_upper_bound(X, X) = X % 1.44/1.55 greatest_lower_bound(X, X) = X % 1.44/1.55 least_upper_bound(X, greatest_lower_bound(X, Y)) = X % 1.44/1.55 greatest_lower_bound(X, least_upper_bound(X, Y)) = X % 1.44/1.55 multiply(X, least_upper_bound(Y, Z)) = least_upper_bound(multiply(X, Y), multiply(X, Z)) % 1.44/1.55 multiply(X, greatest_lower_bound(Y, Z)) = greatest_lower_bound(multiply(X, Y), multiply(X, Z)) % 1.44/1.55 multiply(least_upper_bound(Y, Z), X) = least_upper_bound(multiply(Y, X), multiply(Z, X)) % 1.44/1.55 multiply(greatest_lower_bound(Y, Z), X) = greatest_lower_bound(multiply(Y, X), multiply(Z, X)) % 1.44/1.55 greatest_lower_bound(a, b) = a % 1.44/1.55 greatest_lower_bound(multiply(inverse(c), multiply(a, c)), multiply(inverse(c), multiply(b, c))) = multiply(inverse(c), multiply(a, c)) ==> \bottom % 1.44/1.55 % 1.44/1.55 This holds because % 1.44/1.55 % 1.44/1.55 [2] the following E entails the following G (Claessen-Smallbone's transformation (2018)): % 1.44/1.55 % 1.44/1.55 E: % 1.44/1.55 f1(greatest_lower_bound(multiply(inverse(c), multiply(a, c)), multiply(inverse(c), multiply(b, c)))) = true__ % 1.44/1.55 f1(multiply(inverse(c), multiply(a, c))) = false__ % 1.44/1.55 greatest_lower_bound(X, X) = X % 1.44/1.55 greatest_lower_bound(X, Y) = greatest_lower_bound(Y, X) % 1.44/1.55 greatest_lower_bound(X, greatest_lower_bound(Y, Z)) = greatest_lower_bound(greatest_lower_bound(X, Y), Z) % 1.44/1.55 greatest_lower_bound(X, least_upper_bound(X, Y)) = X % 1.44/1.55 greatest_lower_bound(a, b) = a % 1.44/1.55 least_upper_bound(X, X) = X % 1.44/1.55 least_upper_bound(X, Y) = least_upper_bound(Y, X) % 1.44/1.55 least_upper_bound(X, greatest_lower_bound(X, Y)) = X % 1.44/1.55 least_upper_bound(X, least_upper_bound(Y, Z)) = least_upper_bound(least_upper_bound(X, Y), Z) % 1.44/1.55 multiply(X, greatest_lower_bound(Y, Z)) = greatest_lower_bound(multiply(X, Y), multiply(X, Z)) % 1.44/1.55 multiply(X, least_upper_bound(Y, Z)) = least_upper_bound(multiply(X, Y), multiply(X, Z)) % 1.44/1.55 multiply(greatest_lower_bound(Y, Z), X) = greatest_lower_bound(multiply(Y, X), multiply(Z, X)) % 1.44/1.55 multiply(identity, X) = X % 1.44/1.55 multiply(inverse(X), X) = identity % 1.44/1.55 multiply(least_upper_bound(Y, Z), X) = least_upper_bound(multiply(Y, X), multiply(Z, X)) % 1.44/1.55 multiply(multiply(X, Y), Z) = multiply(X, multiply(Y, Z)) % 1.44/1.55 G: % 1.44/1.55 true__ = false__ % 1.44/1.55 % 1.44/1.55 This holds because % 1.44/1.55 % 1.44/1.55 [3] E entails the following ordered TRS and the lhs and rhs of G join by the TRS: % 1.44/1.55 % 1.44/1.55 greatest_lower_bound(X, Y) = greatest_lower_bound(Y, X) % 1.44/1.55 greatest_lower_bound(Y1, greatest_lower_bound(Y0, Y2)) = greatest_lower_bound(Y0, greatest_lower_bound(Y1, Y2)) % 1.44/1.55 greatest_lower_bound(Y1, multiply(Y0, Y1)) = multiply(greatest_lower_bound(Y0, identity), Y1) % 1.44/1.55 greatest_lower_bound(Y1, multiply(Y2, Y1)) = multiply(greatest_lower_bound(identity, Y2), Y1) % 1.44/1.55 greatest_lower_bound(Y2, greatest_lower_bound(Y0, Y1)) = greatest_lower_bound(Y0, greatest_lower_bound(Y1, Y2)) % 1.44/1.55 greatest_lower_bound(identity, multiply(inverse(Y1), Y2)) = multiply(inverse(Y1), greatest_lower_bound(Y1, Y2)) % 1.44/1.55 greatest_lower_bound(identity, multiply(inverse(Y2), Y1)) = multiply(inverse(Y2), greatest_lower_bound(Y1, Y2)) % 1.44/1.55 greatest_lower_bound(multiply(Y0, Y1), identity) = multiply(greatest_lower_bound(Y0, inverse(Y1)), Y1) % 1.44/1.55 least_upper_bound(X, Y) = least_upper_bound(Y, X) % 1.44/1.55 least_upper_bound(Y1, least_upper_bound(Y0, Y2)) = least_upper_bound(Y0, least_upper_bound(Y1, Y2)) % 1.44/1.55 least_upper_bound(Y1, multiply(Y0, Y1)) = multiply(least_upper_bound(Y0, identity), Y1) % 1.44/1.55 least_upper_bound(Y1, multiply(Y2, Y1)) = multiply(least_upper_bound(identity, Y2), Y1) % 1.44/1.55 least_upper_bound(Y2, least_upper_bound(Y0, Y1)) = least_upper_bound(Y0, least_upper_bound(Y1, Y2)) % 1.44/1.55 least_upper_bound(identity, multiply(inverse(Y1), Y2)) = multiply(inverse(Y1), least_upper_bound(Y1, Y2)) % 1.44/1.55 least_upper_bound(identity, multiply(inverse(Y2), Y1)) = multiply(inverse(Y2), least_upper_bound(Y1, Y2)) % 1.44/1.55 least_upper_bound(multiply(Y0, Y1), identity) = multiply(least_upper_bound(Y0, inverse(Y1)), Y1) % 1.44/1.55 f1(greatest_lower_bound(multiply(inverse(c), multiply(a, c)), multiply(inverse(c), multiply(b, c)))) -> true__ % 1.44/1.55 f1(multiply(inverse(c), multiply(a, c))) -> false__ % 1.44/1.55 greatest_lower_bound(X, X) -> X % 1.44/1.55 greatest_lower_bound(X, least_upper_bound(X, Y)) -> X % 1.44/1.55 greatest_lower_bound(Y0, greatest_lower_bound(Y1, greatest_lower_bound(Y0, Y1))) -> greatest_lower_bound(Y0, Y1) % 1.44/1.55 greatest_lower_bound(Y0, greatest_lower_bound(Y1, least_upper_bound(greatest_lower_bound(Y0, Y1), X1))) -> greatest_lower_bound(Y0, Y1) % 1.44/1.55 greatest_lower_bound(Y0, greatest_lower_bound(least_upper_bound(Y0, X1), Y2)) -> greatest_lower_bound(Y0, Y2) % 1.44/1.55 greatest_lower_bound(Y0, least_upper_bound(Y1, Y0)) -> Y0 % 1.44/1.55 greatest_lower_bound(Y1, greatest_lower_bound(Y1, Y2)) -> greatest_lower_bound(Y1, Y2) % 1.44/1.55 greatest_lower_bound(a, b) -> a % 1.44/1.55 greatest_lower_bound(a, greatest_lower_bound(b, Y2)) -> greatest_lower_bound(a, Y2) % 1.44/1.55 greatest_lower_bound(greatest_lower_bound(X, Y), Z) -> greatest_lower_bound(X, greatest_lower_bound(Y, Z)) % 1.44/1.55 greatest_lower_bound(least_upper_bound(X0, X1), least_upper_bound(X0, least_upper_bound(X1, Y1))) -> least_upper_bound(X0, X1) % 1.44/1.55 greatest_lower_bound(multiply(X, Y), multiply(X, Z)) -> multiply(X, greatest_lower_bound(Y, Z)) % 1.44/1.55 greatest_lower_bound(multiply(X0, greatest_lower_bound(X1, X2)), Y2) -> greatest_lower_bound(multiply(X0, X1), greatest_lower_bound(multiply(X0, X2), Y2)) % 1.44/1.55 greatest_lower_bound(multiply(X0, multiply(X1, Y1)), multiply(Y2, Y1)) -> multiply(greatest_lower_bound(multiply(X0, X1), Y2), Y1) % 1.44/1.55 greatest_lower_bound(multiply(Y, X), multiply(Z, X)) -> multiply(greatest_lower_bound(Y, Z), X) % 1.44/1.55 greatest_lower_bound(multiply(Y0, Y1), multiply(X0, multiply(X1, Y1))) -> multiply(greatest_lower_bound(Y0, multiply(X0, X1)), Y1) % 1.44/1.55 greatest_lower_bound(multiply(greatest_lower_bound(X0, X2), X1), Y2) -> greatest_lower_bound(multiply(X0, X1), greatest_lower_bound(multiply(X2, X1), Y2)) % 1.44/1.55 least_upper_bound(X, X) -> X % 1.44/1.55 least_upper_bound(X, greatest_lower_bound(X, Y)) -> X % 1.44/1.55 least_upper_bound(Y0, greatest_lower_bound(Y1, Y0)) -> Y0 % 1.44/1.55 least_upper_bound(Y0, least_upper_bound(Y1, greatest_lower_bound(least_upper_bound(Y0, Y1), X1))) -> least_upper_bound(Y0, Y1) % 1.44/1.55 least_upper_bound(Y0, least_upper_bound(Y1, least_upper_bound(Y0, Y1))) -> least_upper_bound(Y0, Y1) % 1.44/1.55 least_upper_bound(Y0, least_upper_bound(greatest_lower_bound(Y0, X1), Y2)) -> least_upper_bound(Y0, Y2) % 1.44/1.55 least_upper_bound(Y1, least_upper_bound(Y1, Y2)) -> least_upper_bound(Y1, Y2) % 1.44/1.55 least_upper_bound(greatest_lower_bound(X0, X1), greatest_lower_bound(X0, greatest_lower_bound(X1, Y1))) -> greatest_lower_bound(X0, X1) % 1.44/1.55 least_upper_bound(least_upper_bound(X, Y), Z) -> least_upper_bound(X, least_upper_bound(Y, Z)) % 1.44/1.55 least_upper_bound(multiply(X, Y), multiply(X, Z)) -> multiply(X, least_upper_bound(Y, Z)) % 1.44/1.55 least_upper_bound(multiply(X0, least_upper_bound(X1, X2)), Y2) -> least_upper_bound(multiply(X0, X1), least_upper_bound(multiply(X0, X2), Y2)) % 1.44/1.55 least_upper_bound(multiply(X0, multiply(X1, Y1)), multiply(Y2, Y1)) -> multiply(least_upper_bound(multiply(X0, X1), Y2), Y1) % 1.44/1.55 least_upper_bound(multiply(Y, X), multiply(Z, X)) -> multiply(least_upper_bound(Y, Z), X) % 1.44/1.55 least_upper_bound(multiply(Y0, Y1), multiply(X0, multiply(X1, Y1))) -> multiply(least_upper_bound(Y0, multiply(X0, X1)), Y1) % 1.44/1.55 least_upper_bound(multiply(least_upper_bound(X0, X2), X1), Y2) -> least_upper_bound(multiply(X0, X1), least_upper_bound(multiply(X2, X1), Y2)) % 1.44/1.55 multiply(greatest_lower_bound(inverse(Y1), Y2), Y1) -> greatest_lower_bound(identity, multiply(Y2, Y1)) % 1.44/1.55 multiply(identity, X) -> X % 1.44/1.55 multiply(inverse(X), X) -> identity % 1.44/1.55 multiply(inverse(Y1), multiply(Y1, Y2)) -> Y2 % 1.44/1.55 multiply(least_upper_bound(inverse(Y1), Y2), Y1) -> least_upper_bound(identity, multiply(Y2, Y1)) % 1.44/1.55 multiply(multiply(X, Y), Z) -> multiply(X, multiply(Y, Z)) % 1.44/1.55 true__ -> false__ % 1.44/1.55 with the LPO induced by % 1.44/1.55 c > f1 > b > a > inverse > identity > greatest_lower_bound > least_upper_bound > multiply > true__ > false__ % 1.44/1.55 % 1.44/1.55 % SZS output end Proof % 1.44/1.55 %------------------------------------------------------------------------------