%------------------------------------------------------------------------------
% File : LisaST---0.9
% Problem : SET468-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : casc-portfolio.sh -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n016.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 08:32:39 AM UTC 2026
% Result : Unsatisfiable 47.94s 43.84s
% Output : CNFRefutation 47.94s
% Verified :
% SZS Type : Refutation
% Derivation depth : 15
% Number of leaves : 14
% Syntax : Number of clauses : 57 ( 22 unt; 13 nHn; 38 RR)
% Number of literals : 102 ( 31 equ; 43 neg)
% Maximal clause size : 3 ( 1 avg)
% Maximal term depth : 5 ( 1 avg)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 15 ( 15 usr; 4 con; 0-3 aty)
% Number of variables : 90 ( 22 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(prove_sets_with_one_member2_1,negated_conjecture,
x = 'null$uclass' ).
cnf(prove_sets_with_one_member2_2,negated_conjecture,
~ subclass('cross$uproduct'(x,x),'identity$urelation') ).
cnf(subclass_members,axiom,
( member(X2,X1)
| ~ member(X2,X0)
| ~ subclass(X0,X1) ) ).
cnf(not_subclass_members1,axiom,
( subclass(X0,X1)
| member('not$usubclass$uelement'(X0,X1),X0) ) ).
cnf(not_subclass_members2,axiom,
( subclass(X0,X1)
| ~ member('not$usubclass$uelement'(X0,X1),X1) ) ).
cnf(class_elements_are_sets,axiom,
subclass(X0,'universal$uclass') ).
cnf(subclass_implies_equal,axiom,
( X0 = X1
| ~ subclass(X1,X0)
| ~ subclass(X0,X1) ) ).
cnf(cartesian_product1,axiom,
( member(X0,X2)
| ~ member('ordered$upair'(X0,X1),'cross$uproduct'(X2,X3)) ) ).
cnf(cartesian_product4,axiom,
( 'ordered$upair'(first(X0),second(X0)) = X0
| ~ member(X0,'cross$uproduct'(X1,X2)) ) ).
cnf(intersection1,axiom,
( member(X0,X1)
| ~ member(X0,intersection(X1,X2)) ) ).
cnf(complement1,axiom,
( ~ member(X0,X1)
| ~ member(X0,complement(X1)) ) ).
cnf(restriction1,axiom,
intersection(X0,'cross$uproduct'(X1,X2)) = restrict(X0,X1,X2) ).
cnf(domain1,axiom,
( ~ member(X1,'domain$uof'(X0))
| restrict(X0,singleton(X1),'universal$uclass') != 'null$uclass' ) ).
cnf(regularity1,axiom,
( member(regular(X0),X0)
| X0 = 'null$uclass' ) ).
cnf(c0,plain,
'null$uclass' = x,
inference(clausification,[status(esa)],[prove_sets_with_one_member2_1]) ).
cnf(c1,plain,
~ subclass('cross$uproduct'(x,x),'identity$urelation'),
inference(clausification,[status(esa)],[prove_sets_with_one_member2_2]) ).
cnf(c2,plain,
( member(X0,X2)
| ~ subclass(X1,X2)
| ~ member(X0,X1) ),
inference(clausification,[status(esa)],[subclass_members]) ).
cnf(c3,plain,
( subclass(X0,X1)
| member('not$usubclass$uelement'(X0,X1),X0) ),
inference(clausification,[status(esa)],[not_subclass_members1]) ).
cnf(c4,plain,
( subclass(X0,X1)
| ~ member('not$usubclass$uelement'(X0,X1),X1) ),
inference(clausification,[status(esa)],[not_subclass_members2]) ).
cnf(c5,plain,
subclass(X0,'universal$uclass'),
inference(clausification,[status(esa)],[class_elements_are_sets]) ).
cnf(c8,plain,
( X0 = X1
| ~ subclass(X1,X0)
| ~ subclass(X0,X1) ),
inference(clausification,[status(esa)],[subclass_implies_equal]) ).
cnf(c15,plain,
( member(X0,X2)
| ~ member('ordered$upair'(X0,X1),'cross$uproduct'(X2,X3)) ),
inference(clausification,[status(esa)],[cartesian_product1]) ).
cnf(c18,plain,
( 'ordered$upair'(first(X0),second(X0)) = X0
| ~ member(X0,'cross$uproduct'(X1,X2)) ),
inference(clausification,[status(esa)],[cartesian_product4]) ).
cnf(c22,plain,
( member(X0,X1)
| ~ member(X0,intersection(X1,X2)) ),
inference(clausification,[status(esa)],[intersection1]) ).
cnf(c25,plain,
( ~ member(X0,X1)
| ~ member(X0,complement(X1)) ),
inference(clausification,[status(esa)],[complement1]) ).
cnf(c29,plain,
restrict(X0,X1,X2) = intersection(X0,'cross$uproduct'(X1,X2)),
inference(clausification,[status(esa)],[restriction1]) ).
cnf(c31,plain,
( ~ member(X1,'domain$uof'(X0))
| restrict(X0,singleton(X1),'universal$uclass') != 'null$uclass' ),
inference(clausification,[status(esa)],[domain1]) ).
cnf(c67,plain,
( member(regular(X0),X0)
| X0 = 'null$uclass' ),
inference(clausification,[status(esa)],[regularity1]) ).
cnf(d0,plain,
( complement(X0) = 'null$uclass'
| ~ member(regular(complement(X0)),X0) ),
inference(resolution,[status(thm)],[c25,c67]) ).
cnf(d1,plain,
( member(regular(X0),X1)
| ~ subclass(X0,X1)
| X0 = 'null$uclass' ),
inference(resolution,[status(thm)],[c67,c2]) ).
cnf(d2,plain,
( complement(X0) = 'null$uclass'
| ~ subclass(complement(X0),X0)
| complement(X0) = 'null$uclass' ),
inference(resolution,[status(thm)],[d1,d0]) ).
cnf(d3,plain,
complement('universal$uclass') = 'null$uclass',
inference(resolution,[status(thm)],[d2,c5]) ).
cnf(d4,plain,
( member('not$usubclass$uelement'(X0,X1),X2)
| ~ subclass(X0,X2)
| subclass(X0,X1) ),
inference(resolution,[status(thm)],[c3,c2]) ).
cnf(d5,plain,
( subclass(complement(X0),X1)
| ~ member('not$usubclass$uelement'(complement(X0),X1),X0) ),
inference(resolution,[status(thm)],[c25,c3]) ).
cnf(d6,plain,
( subclass(complement(X0),X1)
| ~ subclass(complement(X0),X0)
| subclass(complement(X0),X1) ),
inference(resolution,[status(thm)],[d5,d4]) ).
cnf(d7,plain,
subclass(complement('universal$uclass'),X0),
inference(resolution,[status(thm)],[d6,c5]) ).
cnf(d8,plain,
subclass('null$uclass',X0),
inference(demodulation,[status(thm)],[d7,d3]) ).
cnf(d9,plain,
( ~ subclass(X0,'null$uclass')
| 'null$uclass' = X0 ),
inference(resolution,[status(thm)],[d8,c8]) ).
cnf(d10,plain,
( subclass(intersection(X0,X1),X2)
| member('not$usubclass$uelement'(intersection(X0,X1),X2),X0) ),
inference(resolution,[status(thm)],[c22,c3]) ).
cnf(d11,plain,
( subclass(intersection(X0,X1),X0)
| subclass(intersection(X0,X1),X0) ),
inference(resolution,[status(thm)],[d10,c4]) ).
cnf(d12,plain,
'null$uclass' = intersection('null$uclass',X0),
inference(resolution,[status(thm)],[d11,d9]) ).
cnf(d13,plain,
restrict('null$uclass',X0,X1) = 'null$uclass',
inference(superposition,[status(thm)],[d12,c29]) ).
cnf(d14,plain,
( ~ member(X0,'domain$uof'('null$uclass'))
| 'null$uclass' != 'null$uclass' ),
inference(superposition,[status(thm)],[d13,c31]) ).
cnf(d15,plain,
( complement('universal$uclass') = 'null$uclass'
| ~ subclass('null$uclass','universal$uclass') ),
inference(superposition,[status(thm)],[d3,d2]) ).
cnf(d16,plain,
( ~ subclass('null$uclass','universal$uclass')
| 'null$uclass' = 'null$uclass' ),
inference(demodulation,[status(thm)],[d15,d3]) ).
cnf(d17,plain,
'null$uclass' = 'null$uclass',
inference(resolution,[status(thm)],[c5,d16]) ).
cnf(d18,plain,
~ member(X0,'domain$uof'('null$uclass')),
inference(resolution,[status(thm)],[d17,d14]) ).
cnf(d19,plain,
'domain$uof'('null$uclass') = 'null$uclass',
inference(resolution,[status(thm)],[d18,c67]) ).
cnf(d20,plain,
~ member(X0,'null$uclass'),
inference(demodulation,[status(thm)],[d18,d19]) ).
cnf(d21,plain,
( 'cross$uproduct'(X0,X1) = 'null$uclass'
| 'ordered$upair'(first(regular('cross$uproduct'(X0,X1))),second(regular('cross$uproduct'(X0,X1)))) = regular('cross$uproduct'(X0,X1)) ),
inference(resolution,[status(thm)],[c18,c67]) ).
cnf(d22,plain,
( 'cross$uproduct'(X0,X1) = 'null$uclass'
| member(first(regular('cross$uproduct'(X0,X1))),X2)
| ~ member(regular('cross$uproduct'(X0,X1)),'cross$uproduct'(X2,X3)) ),
inference(superposition,[status(thm)],[d21,c15]) ).
cnf(d23,plain,
( 'cross$uproduct'(X0,X1) = 'null$uclass'
| member(first(regular('cross$uproduct'(X0,X1))),X0)
| 'cross$uproduct'(X0,X1) = 'null$uclass' ),
inference(resolution,[status(thm)],[d22,c67]) ).
cnf(d24,plain,
'cross$uproduct'('null$uclass',X0) = 'null$uclass',
inference(resolution,[status(thm)],[d23,d20]) ).
cnf(d25,plain,
~ subclass('cross$uproduct'('null$uclass',x),'identity$urelation'),
inference(demodulation,[status(thm)],[c1,c0]) ).
cnf(d26,plain,
~ subclass('cross$uproduct'('null$uclass','null$uclass'),'identity$urelation'),
inference(demodulation,[status(thm)],[d25,c0]) ).
cnf(d27,plain,
~ subclass('null$uclass','identity$urelation'),
inference(demodulation,[status(thm)],[d26,d24]) ).
cnf(d28,plain,
$false,
inference(resolution,[status(thm)],[d8,d27]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.04 % Problem : SET468-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.06 % Command : casc-portfolio.sh -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.13/0.45 % Computer : n016.cluster.edu
% 0.13/0.45 % Model : x86_64 x86_64
% 0.13/0.45 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.45 % Memory : 8046.5625MB
% 0.13/0.45 % OS : Linux 6.8.0-71-generic
% 0.13/0.45 % CPULimit : 300
% 0.13/0.45 % WCLimit : 300
% 0.13/0.45 % DateTime : Sat Sep 26 07:51:30 UTC 2026
% 0.13/0.45 % CPUTime :
% 0.13/0.45 Running casc-portfolio.sh -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 47.94/43.84 % SZS status Unsatisfiable for theBenchmark.p
% 47.94/43.84 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
%------------------------------------------------------------------------------