%------------------------------------------------------------------------------
% File : LisaST---0.9
% Problem : GRP166-2 : TPTP v9.3.1. Bugfixed v1.2.1.
% Transfm : none
% Format : tptp:raw
% Command : casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n015.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 : Sun Sep 27 07:23:17 AM UTC 2026
% Result : Unsatisfiable 46.57s 10.64s
% Output : CNFRefutation 46.57s
% Verified :
% SZS Type : Refutation
% Derivation depth : 15
% Number of leaves : 10
% Syntax : Number of clauses : 43 ( 43 unt; 0 nHn; 13 RR)
% Number of literals : 43 ( 42 equ; 6 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 : 7 ( 7 usr; 3 con; 0-2 aty)
% Number of variables : 56 ( 5 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(lat2b_1,hypothesis,
'greatest$ulower$ubound'(a,identity) = identity ).
cnf(lat2b_2,hypothesis,
'greatest$ulower$ubound'(b,identity) = identity ).
cnf(prove_lat2b,negated_conjecture,
'greatest$ulower$ubound'(a,multiply(a,b)) != a ).
cnf(left_identity,axiom,
multiply(identity,X0) = X0 ).
cnf(left_inverse,axiom,
multiply(inverse(X0),X0) = identity ).
cnf(associativity,axiom,
multiply(multiply(X0,X1),X2) = multiply(X0,multiply(X1,X2)) ).
cnf(symmetry_of_glb,axiom,
'greatest$ulower$ubound'(X0,X1) = 'greatest$ulower$ubound'(X1,X0) ).
cnf(associativity_of_glb,axiom,
'greatest$ulower$ubound'(X0,'greatest$ulower$ubound'(X1,X2)) = 'greatest$ulower$ubound'('greatest$ulower$ubound'(X0,X1),X2) ).
cnf(lub_absorbtion,axiom,
'least$uupper$ubound'(X0,'greatest$ulower$ubound'(X0,X1)) = X0 ).
cnf(monotony_glb1,axiom,
multiply(X0,'greatest$ulower$ubound'(X1,X2)) = 'greatest$ulower$ubound'(multiply(X0,X1),multiply(X0,X2)) ).
cnf(c0,plain,
'greatest$ulower$ubound'(a,identity) = identity,
inference(clausification,[status(esa)],[lat2b_1]) ).
cnf(c1,plain,
'greatest$ulower$ubound'(b,identity) = identity,
inference(clausification,[status(esa)],[lat2b_2]) ).
cnf(c2,plain,
'greatest$ulower$ubound'(a,multiply(a,b)) != a,
inference(clausification,[status(esa)],[prove_lat2b]) ).
cnf(c3,plain,
multiply(identity,X0) = X0,
inference(clausification,[status(esa)],[left_identity]) ).
cnf(c4,plain,
multiply(inverse(X0),X0) = identity,
inference(clausification,[status(esa)],[left_inverse]) ).
cnf(c5,plain,
multiply(multiply(X0,X1),X2) = multiply(X0,multiply(X1,X2)),
inference(clausification,[status(esa)],[associativity]) ).
cnf(c6,plain,
'greatest$ulower$ubound'(X0,X1) = 'greatest$ulower$ubound'(X1,X0),
inference(clausification,[status(esa)],[symmetry_of_glb]) ).
cnf(c8,plain,
'greatest$ulower$ubound'(X0,'greatest$ulower$ubound'(X1,X2)) = 'greatest$ulower$ubound'('greatest$ulower$ubound'(X0,X1),X2),
inference(clausification,[status(esa)],[associativity_of_glb]) ).
cnf(c12,plain,
'least$uupper$ubound'(X0,'greatest$ulower$ubound'(X0,X1)) = X0,
inference(clausification,[status(esa)],[lub_absorbtion]) ).
cnf(c15,plain,
multiply(X0,'greatest$ulower$ubound'(X1,X2)) = 'greatest$ulower$ubound'(multiply(X0,X1),multiply(X0,X2)),
inference(clausification,[status(esa)],[monotony_glb1]) ).
cnf(d0,plain,
multiply(identity,X1) = multiply(inverse(X0),multiply(X0,X1)),
inference(superposition,[status(thm)],[c4,c5]) ).
cnf(d1,plain,
X0 = multiply(inverse(X1),multiply(X1,X0)),
inference(demodulation,[status(thm)],[d0,c3]) ).
cnf(d2,plain,
multiply(X0,X1) = multiply(inverse(inverse(X0)),X1),
inference(superposition,[status(thm)],[d1,d1]) ).
cnf(d3,plain,
X0 = multiply(inverse(inverse(X0)),identity),
inference(superposition,[status(thm)],[c4,d1]) ).
cnf(d4,plain,
X0 = multiply(X0,identity),
inference(demodulation,[status(thm)],[d3,d2]) ).
cnf(d5,plain,
'greatest$ulower$ubound'(identity,b) = identity,
inference(demodulation,[status(thm)],[c1,c6]) ).
cnf(d6,plain,
multiply(X0,identity) = inverse(inverse(X0)),
inference(superposition,[status(thm)],[d4,d2]) ).
cnf(d7,plain,
X0 = inverse(inverse(X0)),
inference(demodulation,[status(thm)],[d6,d4]) ).
cnf(d8,plain,
multiply(inverse(inverse(X0)),'greatest$ulower$ubound'(X1,identity)) = 'greatest$ulower$ubound'(multiply(inverse(inverse(X0)),X1),X0),
inference(superposition,[status(thm)],[d3,c15]) ).
cnf(d9,plain,
multiply(X0,'greatest$ulower$ubound'(X1,identity)) = 'greatest$ulower$ubound'(multiply(inverse(inverse(X0)),X1),X0),
inference(demodulation,[status(thm)],[d8,d7]) ).
cnf(d10,plain,
multiply(X0,'greatest$ulower$ubound'(X1,identity)) = 'greatest$ulower$ubound'(X0,multiply(inverse(inverse(X0)),X1)),
inference(demodulation,[status(thm)],[d9,c6]) ).
cnf(d11,plain,
multiply(X0,'greatest$ulower$ubound'(X1,identity)) = 'greatest$ulower$ubound'(X0,multiply(X0,X1)),
inference(demodulation,[status(thm)],[d10,d7]) ).
cnf(d12,plain,
multiply(a,'greatest$ulower$ubound'(b,identity)) != a,
inference(demodulation,[status(thm)],[c2,d11]) ).
cnf(d13,plain,
multiply(a,'greatest$ulower$ubound'(identity,b)) != a,
inference(demodulation,[status(thm)],[d12,c6]) ).
cnf(d14,plain,
multiply(a,identity) != a,
inference(demodulation,[status(thm)],[d13,d5]) ).
cnf(d15,plain,
a != a,
inference(demodulation,[status(thm)],[d14,d4]) ).
cnf(d16,plain,
'least$uupper$ubound'(X0,'greatest$ulower$ubound'(X1,X0)) = X0,
inference(superposition,[status(thm)],[c6,c12]) ).
cnf(d17,plain,
'least$uupper$ubound'(X2,'greatest$ulower$ubound'(X0,'greatest$ulower$ubound'(X1,X2))) = X2,
inference(superposition,[status(thm)],[c8,d16]) ).
cnf(d18,plain,
'greatest$ulower$ubound'(identity,a) = identity,
inference(demodulation,[status(thm)],[c0,c6]) ).
cnf(d19,plain,
'greatest$ulower$ubound'(identity,'greatest$ulower$ubound'(a,X0)) = 'greatest$ulower$ubound'(identity,X0),
inference(superposition,[status(thm)],[d18,c8]) ).
cnf(d20,plain,
'least$uupper$ubound'(X0,'greatest$ulower$ubound'(identity,X0)) = X0,
inference(superposition,[status(thm)],[d19,d17]) ).
cnf(d21,plain,
X0 = X0,
inference(demodulation,[status(thm)],[d20,d16]) ).
cnf(d22,plain,
$false,
inference(resolution,[status(thm)],[d21,d15]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.05 % Problem : GRP166-2 : TPTP v9.3.1. Bugfixed v1.2.1.
% 0.00/0.06 % Command : casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.16/0.41 % Computer : n015.cluster.edu
% 0.16/0.41 % Model : x86_64 x86_64
% 0.16/0.41 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.16/0.41 % Memory : 8046.5625MB
% 0.16/0.41 % OS : Linux 6.8.0-71-generic
% 0.16/0.41 % CPULimit : 300
% 0.16/0.41 % WCLimit : 300
% 0.16/0.41 % DateTime : Fri Sep 25 14:35:57 UTC 2026
% 0.16/0.41 % CPUTime :
% 0.16/0.41 Running casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 46.57/10.64 % SZS status Unsatisfiable for theBenchmark.p
% 46.57/10.64 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
%------------------------------------------------------------------------------