%------------------------------------------------------------------------------
% File : LisaST---0.9
% Problem : SET187-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n009.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 08:32:16 AM UTC 2026
% Result : Unsatisfiable 63.34s 11.91s
% Output : CNFRefutation 63.34s
% Verified :
% SZS Type : Refutation
% Derivation depth : 8
% Number of leaves : 11
% Syntax : Number of clauses : 38 ( 7 unt; 13 nHn; 27 RR)
% Number of literals : 80 ( 16 equ; 33 neg)
% Maximal clause size : 4 ( 2 avg)
% Maximal term depth : 4 ( 1 avg)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 7 ( 7 usr; 3 con; 0-2 aty)
% Number of variables : 73 ( 4 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(prove_subclass_property5_1,negated_conjecture,
subclass(x,y) ).
cnf(prove_subclass_property5_2,negated_conjecture,
intersection(complement(y),x) != 'null$uclass' ).
cnf(subclass_members,axiom,
( member(X2,X1)
| ~ member(X2,X0)
| ~ subclass(X0,X1) ) ).
cnf(not_subclass_members1,axiom,
( subclass(X0,X1)
| member('not$usubclass$uelement'(X0,X1),X0) ) ).
cnf(not_subclass_members2,axiom,
( subclass(X0,X1)
| ~ member('not$usubclass$uelement'(X0,X1),X1) ) ).
cnf(subclass_implies_equal,axiom,
( X0 = X1
| ~ subclass(X1,X0)
| ~ subclass(X0,X1) ) ).
cnf(intersection1,axiom,
( member(X0,X1)
| ~ member(X0,intersection(X1,X2)) ) ).
cnf(intersection2,axiom,
( member(X0,X2)
| ~ member(X0,intersection(X1,X2)) ) ).
cnf(intersection3,axiom,
( member(X0,intersection(X1,X2))
| ~ member(X0,X2)
| ~ member(X0,X1) ) ).
cnf(complement1,axiom,
( ~ member(X0,X1)
| ~ member(X0,complement(X1)) ) ).
cnf(regularity1,axiom,
( member(regular(X0),X0)
| X0 = 'null$uclass' ) ).
cnf(c0,plain,
subclass(x,y),
inference(clausification,[status(esa)],[prove_subclass_property5_1]) ).
cnf(c1,plain,
intersection(complement(y),x) != 'null$uclass',
inference(clausification,[status(esa)],[prove_subclass_property5_2]) ).
cnf(c2,plain,
( member(X2,X1)
| ~ member(X2,X0)
| ~ subclass(X0,X1) ),
inference(clausification,[status(esa)],[subclass_members]) ).
cnf(c3,plain,
( subclass(X0,X1)
| member('not$usubclass$uelement'(X0,X1),X0) ),
inference(clausification,[status(esa)],[not_subclass_members1]) ).
cnf(c4,plain,
( subclass(X0,X1)
| ~ member('not$usubclass$uelement'(X0,X1),X1) ),
inference(clausification,[status(esa)],[not_subclass_members2]) ).
cnf(c8,plain,
( X0 = X1
| ~ subclass(X1,X0)
| ~ subclass(X0,X1) ),
inference(clausification,[status(esa)],[subclass_implies_equal]) ).
cnf(c22,plain,
( member(X0,X1)
| ~ member(X0,intersection(X1,X2)) ),
inference(clausification,[status(esa)],[intersection1]) ).
cnf(c23,plain,
( member(X0,X2)
| ~ member(X0,intersection(X1,X2)) ),
inference(clausification,[status(esa)],[intersection2]) ).
cnf(c24,plain,
( member(X0,intersection(X1,X2))
| ~ member(X0,X2)
| ~ member(X0,X1) ),
inference(clausification,[status(esa)],[intersection3]) ).
cnf(c25,plain,
( ~ member(X0,X1)
| ~ member(X0,complement(X1)) ),
inference(clausification,[status(esa)],[complement1]) ).
cnf(c67,plain,
( member(regular(X0),X0)
| X0 = 'null$uclass' ),
inference(clausification,[status(esa)],[regularity1]) ).
cnf(d0,plain,
( member(regular(intersection(X0,X1)),X1)
| intersection(X0,X1) = 'null$uclass' ),
inference(resolution,[status(thm)],[c67,c23]) ).
cnf(d1,plain,
( member(regular(intersection(X0,intersection(X1,X2))),X1)
| intersection(X0,intersection(X1,X2)) = 'null$uclass' ),
inference(resolution,[status(thm)],[d0,c22]) ).
cnf(d2,plain,
( member(regular(intersection(X0,X1)),X0)
| intersection(X0,X1) = 'null$uclass' ),
inference(resolution,[status(thm)],[c67,c22]) ).
cnf(d3,plain,
( ~ member(regular(intersection(complement(X0),X1)),X0)
| intersection(complement(X0),X1) = 'null$uclass' ),
inference(resolution,[status(thm)],[d2,c25]) ).
cnf(d4,plain,
( intersection(complement(X0),intersection(X0,X1)) = 'null$uclass'
| intersection(complement(X0),intersection(X0,X1)) = 'null$uclass' ),
inference(resolution,[status(thm)],[d3,d1]) ).
cnf(d5,plain,
( subclass(intersection(X0,X1),X2)
| member('not$usubclass$uelement'(intersection(X0,X1),X2),X1) ),
inference(resolution,[status(thm)],[c23,c3]) ).
cnf(d6,plain,
( subclass(intersection(X0,X1),X1)
| subclass(intersection(X0,X1),X1) ),
inference(resolution,[status(thm)],[d5,c4]) ).
cnf(d7,plain,
( ~ subclass(X0,intersection(X1,X0))
| X0 = intersection(X1,X0) ),
inference(resolution,[status(thm)],[d6,c8]) ).
cnf(d8,plain,
( member('not$usubclass$uelement'(X0,X1),X2)
| ~ subclass(X0,X2)
| subclass(X0,X1) ),
inference(resolution,[status(thm)],[c3,c2]) ).
cnf(d9,plain,
( subclass(X0,intersection(X1,X2))
| ~ member('not$usubclass$uelement'(X0,intersection(X1,X2)),X2)
| ~ member('not$usubclass$uelement'(X0,intersection(X1,X2)),X1) ),
inference(resolution,[status(thm)],[c24,c4]) ).
cnf(d10,plain,
( subclass(X0,intersection(X1,X2))
| ~ subclass(X0,X1)
| ~ member('not$usubclass$uelement'(X0,intersection(X1,X2)),X2)
| subclass(X0,intersection(X1,X2)) ),
inference(resolution,[status(thm)],[d9,d8]) ).
cnf(d11,plain,
( subclass(X0,intersection(X1,X0))
| subclass(X0,intersection(X1,X0))
| ~ subclass(X0,X1) ),
inference(resolution,[status(thm)],[d10,c3]) ).
cnf(d12,plain,
( X0 = intersection(X1,X0)
| ~ subclass(X0,X1) ),
inference(resolution,[status(thm)],[d11,d7]) ).
cnf(d13,plain,
x = intersection(y,x),
inference(resolution,[status(thm)],[d12,c0]) ).
cnf(d14,plain,
intersection(complement(y),x) = 'null$uclass',
inference(superposition,[status(thm)],[d13,d4]) ).
cnf(d15,plain,
$false,
inference(resolution,[status(thm)],[c1,d14]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SET187-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.04 % Command : casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.09/0.36 % Computer : n009.cluster.edu
% 0.09/0.36 % Model : x86_64 x86_64
% 0.09/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.36 % Memory : 8046.5625MB
% 0.09/0.36 % OS : Linux 6.8.0-71-generic
% 0.09/0.36 % CPULimit : 300
% 0.09/0.36 % WCLimit : 300
% 0.09/0.36 % DateTime : Sat Sep 26 07:18:14 UTC 2026
% 0.09/0.36 % CPUTime :
% 0.09/0.36 Running casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 63.34/11.91 % SZS status Unsatisfiable for theBenchmark.p
% 63.34/11.91 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
%------------------------------------------------------------------------------