%------------------------------------------------------------------------------
% File : Twee---2.7
% Problem : GRP172-1 : TPTP v9.3.1. Bugfixed v1.2.1.
% Transfm : none
% Format : tptp:raw
% Command : run_twee /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n019.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8046.5625MB
% OS : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Tue Sep 29 10:09:32 AM UTC 2026
% Result : Unsatisfiable 0.12s 0.46s
% Output : CNFRefutation 0.55s
% Verified :
% SZS Type : Refutation
% Derivation depth : 15
% Number of leaves : 9
% Syntax : Number of clauses : 51 ( 51 unt; 0 nHn; 17 RR)
% Number of literals : 51 ( 50 equ; 1 neg)
% Maximal clause size : 1 ( 1 avg)
% Maximal term depth : 5 ( 2 avg)
% Number of predicates : 2 ( 0 usr; 1 prp; 0-2 aty)
% Number of functors : 6 ( 6 usr; 3 con; 0-2 aty)
% Number of variables : 70 ( 3 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(c1,negated_conjecture,
greatest_lower_bound(identity,multiply(a,b)) != identity,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_p04b) ).
cnf(c2,axiom,
greatest_lower_bound(X,Y) = greatest_lower_bound(Y,X),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',symmetry_of_glb) ).
cnf(c3,plain,
greatest_lower_bound(X3,X2) = greatest_lower_bound(X2,X3),
inference(substitution,[status(thm)],[c2]) ).
cnf(c4,plain,
greatest_lower_bound(X2,X3) = greatest_lower_bound(X3,X2),
inference(symmetry,[status(thm)],[c3]) ).
cnf(c5,plain,
least_upper_bound(X3,greatest_lower_bound(X2,X3)) = least_upper_bound(X3,greatest_lower_bound(X3,X2)),
inference(congruence,[status(thm)],[c4]) ).
cnf(c6,axiom,
least_upper_bound(X2,greatest_lower_bound(X2,Y2)) = X2,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',lub_absorbtion) ).
cnf(c7,plain,
least_upper_bound(X3,greatest_lower_bound(X3,X2)) = X3,
inference(substitution,[status(thm)],[c6]) ).
cnf(c8,plain,
least_upper_bound(X3,greatest_lower_bound(X2,X3)) = X3,
inference(transitivity,[status(thm)],[c5,c7]) ).
cnf(c9,plain,
least_upper_bound(greatest_lower_bound(identity,multiply(a,b)),greatest_lower_bound(b,greatest_lower_bound(identity,multiply(a,b)))) = greatest_lower_bound(identity,multiply(a,b)),
inference(substitution,[status(thm)],[c8]) ).
cnf(c10,plain,
greatest_lower_bound(identity,multiply(a,b)) = least_upper_bound(greatest_lower_bound(identity,multiply(a,b)),greatest_lower_bound(b,greatest_lower_bound(identity,multiply(a,b)))),
inference(symmetry,[status(thm)],[c9]) ).
cnf(c11,plain,
greatest_lower_bound(greatest_lower_bound(X3,X4),X2) = greatest_lower_bound(X2,greatest_lower_bound(X3,X4)),
inference(substitution,[status(thm)],[c2]) ).
cnf(c12,plain,
greatest_lower_bound(X3,greatest_lower_bound(X4,X2)) = greatest_lower_bound(greatest_lower_bound(X4,X2),X3),
inference(symmetry,[status(thm)],[c11]) ).
cnf(c13,axiom,
greatest_lower_bound(X2,greatest_lower_bound(Y2,Z)) = greatest_lower_bound(greatest_lower_bound(X2,Y2),Z),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',associativity_of_glb) ).
cnf(c14,plain,
greatest_lower_bound(X4,greatest_lower_bound(X2,X3)) = greatest_lower_bound(greatest_lower_bound(X4,X2),X3),
inference(substitution,[status(thm)],[c13]) ).
cnf(c15,plain,
greatest_lower_bound(greatest_lower_bound(X4,X2),X3) = greatest_lower_bound(X4,greatest_lower_bound(X2,X3)),
inference(symmetry,[status(thm)],[c14]) ).
cnf(c16,plain,
greatest_lower_bound(X2,X3) = greatest_lower_bound(X3,X2),
inference(substitution,[status(thm)],[c2]) ).
cnf(c17,plain,
greatest_lower_bound(X4,greatest_lower_bound(X2,X3)) = greatest_lower_bound(X4,greatest_lower_bound(X3,X2)),
inference(congruence,[status(thm)],[c16]) ).
cnf(c18,plain,
greatest_lower_bound(greatest_lower_bound(X4,X2),X3) = greatest_lower_bound(X4,greatest_lower_bound(X3,X2)),
inference(transitivity,[status(thm)],[c15,c17]) ).
cnf(c19,plain,
greatest_lower_bound(X3,greatest_lower_bound(X4,X2)) = greatest_lower_bound(X4,greatest_lower_bound(X3,X2)),
inference(transitivity,[status(thm)],[c12,c18]) ).
cnf(c20,plain,
greatest_lower_bound(b,greatest_lower_bound(identity,multiply(a,b))) = greatest_lower_bound(identity,greatest_lower_bound(b,multiply(a,b))),
inference(substitution,[status(thm)],[c19]) ).
cnf(c21,plain,
greatest_lower_bound(multiply(a,X2),X2) = greatest_lower_bound(X2,multiply(a,X2)),
inference(substitution,[status(thm)],[c2]) ).
cnf(c22,plain,
greatest_lower_bound(X2,multiply(a,X2)) = greatest_lower_bound(multiply(a,X2),X2),
inference(symmetry,[status(thm)],[c21]) ).
cnf(c23,axiom,
multiply(identity,X2) = X2,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',step) ).
cnf(c24,plain,
X2 = multiply(identity,X2),
inference(symmetry,[status(thm)],[c23]) ).
cnf(c25,plain,
greatest_lower_bound(multiply(a,X2),X2) = greatest_lower_bound(multiply(a,X2),multiply(identity,X2)),
inference(congruence,[status(thm)],[c24]) ).
cnf(c26,axiom,
multiply(greatest_lower_bound(Y2,Z2),X2) = greatest_lower_bound(multiply(Y2,X2),multiply(Z2,X2)),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',monotony_glb2) ).
cnf(c27,plain,
multiply(greatest_lower_bound(X4,X2),X3) = greatest_lower_bound(multiply(X4,X3),multiply(X2,X3)),
inference(substitution,[status(thm)],[c26]) ).
cnf(c28,plain,
greatest_lower_bound(multiply(X4,X3),multiply(X2,X3)) = multiply(greatest_lower_bound(X4,X2),X3),
inference(symmetry,[status(thm)],[c27]) ).
cnf(c29,plain,
greatest_lower_bound(X3,X2) = greatest_lower_bound(X2,X3),
inference(substitution,[status(thm)],[c2]) ).
cnf(c30,plain,
multiply(greatest_lower_bound(X4,X2),X3) = multiply(greatest_lower_bound(X2,X4),X3),
inference(congruence,[status(thm)],[c29]) ).
cnf(c31,plain,
greatest_lower_bound(multiply(X4,X3),multiply(X2,X3)) = multiply(greatest_lower_bound(X2,X4),X3),
inference(transitivity,[status(thm)],[c28,c30]) ).
cnf(c32,plain,
greatest_lower_bound(multiply(a,X2),multiply(identity,X2)) = multiply(greatest_lower_bound(identity,a),X2),
inference(substitution,[status(thm)],[c31]) ).
cnf(c33,axiom,
greatest_lower_bound(identity,a) = identity,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',step) ).
cnf(c34,plain,
multiply(greatest_lower_bound(identity,a),X2) = multiply(identity,X2),
inference(congruence,[status(thm)],[c33]) ).
cnf(c35,plain,
multiply(greatest_lower_bound(identity,a),X2) = X2,
inference(transitivity,[status(thm)],[c34,c23]) ).
cnf(c36,plain,
greatest_lower_bound(multiply(a,X2),multiply(identity,X2)) = X2,
inference(transitivity,[status(thm)],[c32,c35]) ).
cnf(c37,plain,
greatest_lower_bound(multiply(a,X2),X2) = X2,
inference(transitivity,[status(thm)],[c25,c36]) ).
cnf(c38,plain,
greatest_lower_bound(X2,multiply(a,X2)) = X2,
inference(transitivity,[status(thm)],[c22,c37]) ).
cnf(c39,plain,
greatest_lower_bound(b,multiply(a,b)) = b,
inference(substitution,[status(thm)],[c38]) ).
cnf(c40,plain,
greatest_lower_bound(identity,greatest_lower_bound(b,multiply(a,b))) = greatest_lower_bound(identity,b),
inference(congruence,[status(thm)],[c39]) ).
cnf(c41,axiom,
greatest_lower_bound(identity,b) = identity,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',step) ).
cnf(c42,plain,
greatest_lower_bound(identity,greatest_lower_bound(b,multiply(a,b))) = identity,
inference(transitivity,[status(thm)],[c40,c41]) ).
cnf(c43,plain,
greatest_lower_bound(b,greatest_lower_bound(identity,multiply(a,b))) = identity,
inference(transitivity,[status(thm)],[c20,c42]) ).
cnf(c44,plain,
least_upper_bound(greatest_lower_bound(identity,multiply(a,b)),greatest_lower_bound(b,greatest_lower_bound(identity,multiply(a,b)))) = least_upper_bound(greatest_lower_bound(identity,multiply(a,b)),identity),
inference(congruence,[status(thm)],[c43]) ).
cnf(c45,axiom,
least_upper_bound(X2,Y2) = least_upper_bound(Y2,X2),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',symmetry_of_lub) ).
cnf(c46,plain,
least_upper_bound(greatest_lower_bound(identity,multiply(a,b)),identity) = least_upper_bound(identity,greatest_lower_bound(identity,multiply(a,b))),
inference(substitution,[status(thm)],[c45]) ).
cnf(c47,plain,
least_upper_bound(identity,greatest_lower_bound(identity,multiply(a,b))) = identity,
inference(substitution,[status(thm)],[c6]) ).
cnf(c48,plain,
least_upper_bound(greatest_lower_bound(identity,multiply(a,b)),identity) = identity,
inference(transitivity,[status(thm)],[c46,c47]) ).
cnf(c49,plain,
least_upper_bound(greatest_lower_bound(identity,multiply(a,b)),greatest_lower_bound(b,greatest_lower_bound(identity,multiply(a,b)))) = identity,
inference(transitivity,[status(thm)],[c44,c48]) ).
cnf(c50,plain,
greatest_lower_bound(identity,multiply(a,b)) = identity,
inference(transitivity,[status(thm)],[c10,c49]) ).
cnf(c51,plain,
$false,
inference(resolution,[status(thm)],[c1,c50]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : GRP172-1 : TPTP v9.3.1. Bugfixed v1.2.1.
% 0.00/0.04 % Command : run_twee /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.06/0.34 % Computer : n019.cluster.edu
% 0.06/0.34 % Model : x86_64 x86_64
% 0.06/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.06/0.34 % Memory : 8046.5625MB
% 0.06/0.34 % OS : Linux 6.8.0-71-generic
% 0.06/0.34 % CPULimit : 300
% 0.06/0.34 % WCLimit : 300
% 0.06/0.34 % DateTime : Sun Sep 27 09:35:33 UTC 2026
% 0.06/0.35 % CPUTime :
% 0.06/0.35 Running run_twee /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.12/0.46 Command-line arguments: --lhs-weight 9 --flip-ordering --complete-subsets --normalise-queue-percent 10 --cp-renormalise-threshold 10
% 0.12/0.46
% 0.12/0.46 % SZS status Unsatisfiable
% 0.12/0.46
% 0.12/0.46 % SZS output start CNFRefutation
% See solution above
% 0.55/0.48
% 0.55/0.48 RESULT: Unsatisfiable (the axioms are contradictory).
%------------------------------------------------------------------------------