%------------------------------------------------------------------------------
% File : LisaST---0.9
% Problem : GRP005-1 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n017.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 07:22:04 AM UTC 2026
% Result : Unsatisfiable 12.26s 2.47s
% Output : CNFRefutation 12.26s
% Verified :
% SZS Type : Refutation
% Derivation depth : 4
% Number of leaves : 4
% Syntax : Number of clauses : 11 ( 8 unt; 0 nHn; 9 RR)
% Number of literals : 19 ( 0 equ; 11 neg)
% Maximal clause size : 4 ( 1 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 3 ( 2 usr; 1 prp; 0-3 aty)
% Number of functors : 3 ( 3 usr; 2 con; 0-1 aty)
% Number of variables : 10 ( 1 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(right_inverse,axiom,
product(X0,inverse(X0),identity) ).
cnf(element_of_set,axiom,
'an$uelement'(a) ).
cnf(condition,axiom,
( 'an$uelement'(X2)
| ~ product(X0,inverse(X1),X2)
| ~ 'an$uelement'(X1)
| ~ 'an$uelement'(X0) ) ).
cnf(prove_identity_is_an_element,negated_conjecture,
~ 'an$uelement'(identity) ).
cnf(c2,plain,
product(X0,inverse(X0),identity),
inference(clausification,[status(esa)],[right_inverse]) ).
cnf(c4,plain,
'an$uelement'(a),
inference(clausification,[status(esa)],[element_of_set]) ).
cnf(c5,plain,
( 'an$uelement'(X2)
| ~ product(X0,inverse(X1),X2)
| ~ 'an$uelement'(X1)
| ~ 'an$uelement'(X0) ),
inference(clausification,[status(esa)],[condition]) ).
cnf(c8,plain,
~ 'an$uelement'(identity),
inference(clausification,[status(esa)],[prove_identity_is_an_element]) ).
cnf(d0,plain,
( ~ 'an$uelement'(X0)
| ~ 'an$uelement'(X0)
| 'an$uelement'(identity) ),
inference(resolution,[status(thm)],[c5,c2]) ).
cnf(d1,plain,
~ 'an$uelement'(X0),
inference(resolution,[status(thm)],[c8,d0]) ).
cnf(d2,plain,
$false,
inference(resolution,[status(thm)],[d1,c4]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : GRP005-1 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.04 % Command : casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.07/0.36 % Computer : n017.cluster.edu
% 0.07/0.36 % Model : x86_64 x86_64
% 0.07/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.07/0.36 % Memory : 8046.5625MB
% 0.07/0.36 % OS : Linux 6.8.0-71-generic
% 0.07/0.36 % CPULimit : 300
% 0.07/0.36 % WCLimit : 300
% 0.07/0.36 % DateTime : Fri Sep 25 14:11:18 UTC 2026
% 0.07/0.36 % CPUTime :
% 0.07/0.36 Running casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 12.26/2.47 % SZS status Unsatisfiable for theBenchmark.p
% 12.26/2.47 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
%------------------------------------------------------------------------------