%------------------------------------------------------------------------------
% File : Prover9---2026-6A
% Problem : SET154-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n012.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 08:35:55 AM UTC 2026
% Result : Unsatisfiable 62.45s 9.35s
% Output : CNFRefutation 62.45s
% Verified :
% SZS Type : Refutation
% Derivation depth : 25
% Number of leaves : 17
% Syntax : Number of formulae : 98 ( 31 unt; 0 def)
% Number of atoms : 181 ( 88 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 137 ( 54 ~; 83 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 7 ( 3 avg)
% Maximal term depth : 6 ( 1 avg)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 13 ( 13 usr; 3 con; 0-3 aty)
% Number of variables : 147 ( 9 sgn 35 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(prove_union_with_complement_1,axiom,
union(complement(x),x) != universal_class,
file('theBenchmark.p',prove_union_with_complement_1) ).
cnf(c_36,plain,
union(complement(x),x) != universal_class,
inference(clausify,[status(thm)],[prove_union_with_complement_1]) ).
fof(regularity1,axiom,
! [VAR_0] :
( member(regular(VAR_0),VAR_0)
| VAR_0 = null_class ),
file('theBenchmark.p',regularity1) ).
cnf(c_75,plain,
( member(regular(A),A)
| A = null_class ),
inference(clausify,[status(thm)],[regularity1]) ).
cnf(c_76,plain,
( member(regular(A),A)
| null_class = A ),
inference(copy,[status(thm)],[c_75]) ).
fof(domain1,axiom,
! [VAR_0,VAR_1] :
( ~ member(VAR_1,domain_of(VAR_0))
| restrict(VAR_0,singleton(VAR_1),universal_class) != null_class ),
file('theBenchmark.p',domain1) ).
cnf(c_109,plain,
( ~ member(B,domain_of(A))
| restrict(A,singleton(B),universal_class) != null_class ),
inference(clausify,[status(thm)],[domain1]) ).
fof(restriction2,axiom,
! [VAR_0,VAR_1,VAR_2] : intersection(cross_product(VAR_0,VAR_1),VAR_2) = restrict(VAR_2,VAR_0,VAR_1),
file('theBenchmark.p',restriction2) ).
cnf(c_110,plain,
intersection(cross_product(A,B),C) = restrict(C,A,B),
inference(clausify,[status(thm)],[restriction2]) ).
cnf(c_111,plain,
restrict(A,B,C) = intersection(cross_product(B,C),A),
inference(copy,[status(thm)],[c_110]) ).
fof(restriction1,axiom,
! [VAR_0,VAR_1,VAR_2] : intersection(VAR_0,cross_product(VAR_1,VAR_2)) = restrict(VAR_0,VAR_1,VAR_2),
file('theBenchmark.p',restriction1) ).
cnf(c_112,plain,
intersection(A,cross_product(B,C)) = restrict(A,B,C),
inference(clausify,[status(thm)],[restriction1]) ).
cnf(c_44958,plain,
intersection(A,cross_product(B,C)) = intersection(cross_product(B,C),A),
inference(paramod,[status(thm)],[c_111,c_112]) ).
cnf(c_113,plain,
intersection(cross_product(A,B),C) = intersection(C,cross_product(A,B)),
inference(copy,[status(thm)],[c_44958]) ).
fof(union,axiom,
! [VAR_0,VAR_1] : complement(intersection(complement(VAR_0),complement(VAR_1))) = union(VAR_0,VAR_1),
file('theBenchmark.p',union) ).
cnf(c_116,plain,
complement(intersection(complement(A),complement(B))) = union(A,B),
inference(clausify,[status(thm)],[union]) ).
cnf(c_117,plain,
union(A,B) = complement(intersection(complement(A),complement(B))),
inference(copy,[status(thm)],[c_116]) ).
fof(complement2,axiom,
! [VAR_0,VAR_1] :
( member(VAR_0,VAR_1)
| member(VAR_0,complement(VAR_1))
| ~ member(VAR_0,universal_class) ),
file('theBenchmark.p',complement2) ).
cnf(c_118,plain,
( member(A,B)
| member(A,complement(B))
| ~ member(A,universal_class) ),
inference(clausify,[status(thm)],[complement2]) ).
fof(complement1,axiom,
! [VAR_0,VAR_1] :
( ~ member(VAR_0,VAR_1)
| ~ member(VAR_0,complement(VAR_1)) ),
file('theBenchmark.p',complement1) ).
cnf(c_119,plain,
( ~ member(A,B)
| ~ member(A,complement(B)) ),
inference(clausify,[status(thm)],[complement1]) ).
fof(intersection3,axiom,
! [VAR_0,VAR_1,VAR_2] :
( member(VAR_0,intersection(VAR_1,VAR_2))
| ~ member(VAR_0,VAR_2)
| ~ member(VAR_0,VAR_1) ),
file('theBenchmark.p',intersection3) ).
cnf(c_120,plain,
( member(A,intersection(B,C))
| ~ member(A,C)
| ~ member(A,B) ),
inference(clausify,[status(thm)],[intersection3]) ).
fof(intersection2,axiom,
! [VAR_0,VAR_1,VAR_2] :
( member(VAR_0,VAR_2)
| ~ member(VAR_0,intersection(VAR_1,VAR_2)) ),
file('theBenchmark.p',intersection2) ).
cnf(c_121,plain,
( member(A,C)
| ~ member(A,intersection(B,C)) ),
inference(clausify,[status(thm)],[intersection2]) ).
fof(intersection1,axiom,
! [VAR_0,VAR_1,VAR_2] :
( member(VAR_0,VAR_1)
| ~ member(VAR_0,intersection(VAR_1,VAR_2)) ),
file('theBenchmark.p',intersection1) ).
cnf(c_122,plain,
( member(A,B)
| ~ member(A,intersection(B,C)) ),
inference(clausify,[status(thm)],[intersection1]) ).
fof(singleton_set,axiom,
! [VAR_0] : unordered_pair(VAR_0,VAR_0) = singleton(VAR_0),
file('theBenchmark.p',singleton_set) ).
cnf(c_132,plain,
unordered_pair(A,A) = singleton(A),
inference(clausify,[status(thm)],[singleton_set]) ).
cnf(c_133,plain,
singleton(A) = unordered_pair(A,A),
inference(copy,[status(thm)],[c_132]) ).
fof(subclass_implies_equal,axiom,
! [VAR_0,VAR_1] :
( VAR_0 = VAR_1
| ~ subclass(VAR_1,VAR_0)
| ~ subclass(VAR_0,VAR_1) ),
file('theBenchmark.p',subclass_implies_equal) ).
cnf(c_138,plain,
( A = B
| ~ subclass(B,A)
| ~ subclass(A,B) ),
inference(clausify,[status(thm)],[subclass_implies_equal]) ).
fof(class_elements_are_sets,axiom,
! [VAR_0] : subclass(VAR_0,universal_class),
file('theBenchmark.p',class_elements_are_sets) ).
cnf(c_141,plain,
subclass(A,universal_class),
inference(clausify,[status(thm)],[class_elements_are_sets]) ).
fof(not_subclass_members2,axiom,
! [VAR_0,VAR_1] :
( subclass(VAR_0,VAR_1)
| ~ member(not_subclass_element(VAR_0,VAR_1),VAR_1) ),
file('theBenchmark.p',not_subclass_members2) ).
cnf(c_142,plain,
( subclass(A,B)
| ~ member(not_subclass_element(A,B),B) ),
inference(clausify,[status(thm)],[not_subclass_members2]) ).
fof(not_subclass_members1,axiom,
! [VAR_0,VAR_1] :
( subclass(VAR_0,VAR_1)
| member(not_subclass_element(VAR_0,VAR_1),VAR_0) ),
file('theBenchmark.p',not_subclass_members1) ).
cnf(c_143,plain,
( subclass(A,B)
| member(not_subclass_element(A,B),A) ),
inference(clausify,[status(thm)],[not_subclass_members1]) ).
fof(subclass_members,axiom,
! [VAR_0,VAR_1,VAR_2] :
( member(VAR_2,VAR_1)
| ~ member(VAR_2,VAR_0)
| ~ subclass(VAR_0,VAR_1) ),
file('theBenchmark.p',subclass_members) ).
cnf(c_144,plain,
( member(C,B)
| ~ member(C,A)
| ~ subclass(A,B) ),
inference(clausify,[status(thm)],[subclass_members]) ).
cnf(c_44959,plain,
( ~ member(B,domain_of(A))
| restrict(A,unordered_pair(B,B),universal_class) != null_class ),
inference(paramod,[status(thm)],[c_133,c_109]) ).
cnf(c_225,plain,
( ~ member(A,domain_of(B))
| intersection(cross_product(unordered_pair(A,A),universal_class),B) != null_class ),
inference(paramod,[status(thm)],[c_111,c_44959]) ).
cnf(c_231,plain,
complement(intersection(complement(complement(x)),complement(x))) != universal_class,
inference(paramod,[status(thm)],[c_117,c_36]) ).
cnf(c_232,plain,
( member(A,intersection(B,B))
| ~ member(A,B) ),
inference(factor,[status(thm)],[c_120]) ).
cnf(c_44960,plain,
( null_class = complement(A)
| ~ member(regular(complement(A)),A) ),
inference(resolve,[status(thm)],[c_119,c_76]) ).
cnf(c_259,plain,
( complement(A) = null_class
| ~ member(regular(complement(A)),A) ),
inference(copy,[status(thm)],[c_44960]) ).
cnf(c_261,plain,
( null_class = A
| member(regular(A),intersection(A,B))
| ~ member(regular(A),B) ),
inference(resolve,[status(thm)],[c_120,c_76]) ).
cnf(c_44961,plain,
( null_class = intersection(A,B)
| member(regular(intersection(A,B)),B) ),
inference(resolve,[status(thm)],[c_121,c_76]) ).
cnf(c_266,plain,
( intersection(A,B) = null_class
| member(regular(intersection(A,B)),B) ),
inference(copy,[status(thm)],[c_44961]) ).
cnf(c_44962,plain,
( null_class = intersection(A,B)
| member(regular(intersection(A,B)),A) ),
inference(resolve,[status(thm)],[c_122,c_76]) ).
cnf(c_269,plain,
( intersection(A,B) = null_class
| member(regular(intersection(A,B)),A) ),
inference(copy,[status(thm)],[c_44962]) ).
cnf(c_304,plain,
( universal_class = A
| ~ subclass(universal_class,A) ),
inference(resolve,[status(thm)],[c_141,c_138]) ).
cnf(c_308,plain,
( member(A,universal_class)
| ~ member(A,B) ),
inference(resolve,[status(thm)],[c_144,c_141]) ).
cnf(c_44963,plain,
( null_class = domain_of(A)
| intersection(cross_product(unordered_pair(regular(domain_of(A)),regular(domain_of(A))),universal_class),A) != null_class ),
inference(resolve,[status(thm)],[c_225,c_76]) ).
cnf(c_44964,plain,
( null_class = domain_of(A)
| intersection(A,cross_product(unordered_pair(regular(domain_of(A)),regular(domain_of(A))),universal_class)) != null_class ),
inference(paramod,[status(thm)],[c_113,c_44963]) ).
cnf(c_366,plain,
( domain_of(A) = null_class
| intersection(A,cross_product(unordered_pair(regular(domain_of(A)),regular(domain_of(A))),universal_class)) != null_class ),
inference(copy,[status(thm)],[c_44964]) ).
cnf(c_438,plain,
( member(not_subclass_element(universal_class,A),universal_class)
| universal_class = A ),
inference(resolve,[status(thm)],[c_304,c_143]) ).
cnf(c_449,plain,
( null_class = A
| member(regular(A),universal_class) ),
inference(resolve,[status(thm)],[c_308,c_76]) ).
cnf(c_525,plain,
( member(regular(A),intersection(universal_class,universal_class))
| null_class = A ),
inference(resolve,[status(thm)],[c_449,c_232]) ).
cnf(c_536,plain,
( member(regular(A),B)
| member(regular(A),complement(B))
| null_class = A ),
inference(resolve,[status(thm)],[c_449,c_118]) ).
cnf(c_743,plain,
( ~ member(regular(intersection(A,complement(B))),B)
| intersection(A,complement(B)) = null_class ),
inference(resolve,[status(thm)],[c_266,c_119]) ).
cnf(c_44965,plain,
( null_class = intersection(A,B)
| member(regular(intersection(A,B)),intersection(intersection(A,B),A))
| intersection(A,B) = null_class ),
inference(resolve,[status(thm)],[c_269,c_261]) ).
cnf(c_44966,plain,
( intersection(A,B) = null_class
| member(regular(intersection(A,B)),intersection(intersection(A,B),A))
| intersection(A,B) = null_class ),
inference(copy,[status(thm)],[c_44965]) ).
cnf(c_809,plain,
( member(regular(intersection(A,B)),intersection(intersection(A,B),A))
| intersection(A,B) = null_class ),
inference(copy,[status(thm)],[c_44966]) ).
cnf(c_828,plain,
( member(regular(intersection(intersection(A,B),C)),B)
| intersection(intersection(A,B),C) = null_class ),
inference(resolve,[status(thm)],[c_269,c_121]) ).
cnf(c_880,plain,
( member(not_subclass_element(universal_class,A),B)
| member(not_subclass_element(universal_class,A),complement(B))
| universal_class = A ),
inference(resolve,[status(thm)],[c_438,c_118]) ).
cnf(c_44967,plain,
( complement(intersection(universal_class,universal_class)) = null_class
| null_class = complement(intersection(universal_class,universal_class)) ),
inference(resolve,[status(thm)],[c_525,c_259]) ).
cnf(c_44968,plain,
( complement(intersection(universal_class,universal_class)) = null_class
| complement(intersection(universal_class,universal_class)) = null_class ),
inference(copy,[status(thm)],[c_44967]) ).
cnf(c_1229,plain,
complement(intersection(universal_class,universal_class)) = null_class,
inference(copy,[status(thm)],[c_44968]) ).
cnf(c_1238,plain,
( ~ member(A,intersection(universal_class,universal_class))
| ~ member(A,null_class) ),
inference(paramod,[status(thm)],[c_1229,c_119]) ).
cnf(c_1243,plain,
( null_class = A
| ~ member(regular(A),null_class) ),
inference(resolve,[status(thm)],[c_1238,c_525]) ).
cnf(c_44969,plain,
( intersection(null_class,A) = null_class
| null_class = intersection(null_class,A) ),
inference(resolve,[status(thm)],[c_1243,c_269]) ).
cnf(c_44970,plain,
( intersection(null_class,A) = null_class
| intersection(null_class,A) = null_class ),
inference(copy,[status(thm)],[c_44969]) ).
cnf(c_1250,plain,
intersection(null_class,A) = null_class,
inference(copy,[status(thm)],[c_44970]) ).
cnf(c_44971,plain,
( intersection(A,null_class) = null_class
| null_class = intersection(A,null_class) ),
inference(resolve,[status(thm)],[c_1243,c_266]) ).
cnf(c_44972,plain,
( intersection(A,null_class) = null_class
| intersection(A,null_class) = null_class ),
inference(copy,[status(thm)],[c_44971]) ).
cnf(c_1251,plain,
intersection(A,null_class) = null_class,
inference(copy,[status(thm)],[c_44972]) ).
cnf(c_5102,plain,
domain_of(null_class) = null_class,
inference(resolve,[status(thm)],[c_366,c_1250]) ).
cnf(c_44973,plain,
( ~ member(A,null_class)
| intersection(cross_product(unordered_pair(A,A),universal_class),null_class) != null_class ),
inference(paramod,[status(thm)],[c_5102,c_225]) ).
cnf(c_44974,plain,
( ~ member(A,null_class)
| null_class != null_class ),
inference(paramod,[status(thm)],[c_1251,c_44973]) ).
cnf(c_5120,plain,
~ member(A,null_class),
inference(copy,[status(thm)],[c_44974]) ).
cnf(c_44975,plain,
( complement(complement(A)) = null_class
| member(regular(complement(complement(A))),A)
| null_class = complement(complement(A)) ),
inference(resolve,[status(thm)],[c_536,c_259]) ).
cnf(c_44976,plain,
( complement(complement(A)) = null_class
| member(regular(complement(complement(A))),A)
| complement(complement(A)) = null_class ),
inference(copy,[status(thm)],[c_44975]) ).
cnf(c_20423,plain,
( member(regular(complement(complement(A))),A)
| complement(complement(A)) = null_class ),
inference(copy,[status(thm)],[c_44976]) ).
cnf(c_44977,plain,
( intersection(intersection(A,B),complement(B)) = null_class
| intersection(intersection(A,B),complement(B)) = null_class ),
inference(resolve,[status(thm)],[c_828,c_743]) ).
cnf(c_40408,plain,
intersection(intersection(A,B),complement(B)) = null_class,
inference(copy,[status(thm)],[c_44977]) ).
cnf(c_44978,plain,
( member(regular(intersection(complement(A),A)),null_class)
| intersection(complement(A),A) = null_class ),
inference(paramod,[status(thm)],[c_40408,c_809]) ).
cnf(c_40411,plain,
intersection(complement(A),A) = null_class,
inference(resolve,[status(thm)],[c_5120,c_44978]) ).
cnf(c_40412,plain,
complement(null_class) != universal_class,
inference(paramod,[status(thm)],[c_40411,c_231]) ).
cnf(c_40537,plain,
complement(complement(null_class)) = null_class,
inference(resolve,[status(thm)],[c_20423,c_5120]) ).
cnf(c_44979,plain,
( member(not_subclass_element(universal_class,A),complement(null_class))
| member(not_subclass_element(universal_class,A),null_class)
| universal_class = A ),
inference(paramod,[status(thm)],[c_40537,c_880]) ).
cnf(c_44949,plain,
( member(not_subclass_element(universal_class,A),complement(null_class))
| universal_class = A ),
inference(resolve,[status(thm)],[c_5120,c_44979]) ).
cnf(c_44980,plain,
( subclass(universal_class,complement(null_class))
| universal_class = complement(null_class) ),
inference(resolve,[status(thm)],[c_44949,c_142]) ).
cnf(c_44981,plain,
( subclass(universal_class,complement(null_class))
| complement(null_class) = universal_class ),
inference(copy,[status(thm)],[c_44980]) ).
cnf(c_44955,plain,
subclass(universal_class,complement(null_class)),
inference(resolve,[status(thm)],[c_40412,c_44981]) ).
cnf(c_44982,plain,
universal_class = complement(null_class),
inference(resolve,[status(thm)],[c_44955,c_304]) ).
cnf(c_44983,plain,
complement(null_class) = universal_class,
inference(copy,[status(thm)],[c_44982]) ).
cnf(c_44957,plain,
$false,
inference(resolve,[status(thm)],[c_40412,c_44983]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.01 % Problem : SET154-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.02 % Command : prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.02/0.29 % Computer : n012.cluster.edu
% 0.02/0.29 % Model : x86_64 x86_64
% 0.02/0.29 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.02/0.29 % Memory : 8046.5625MB
% 0.02/0.29 % OS : Linux 6.8.0-71-generic
% 0.02/0.29 % CPULimit : 300
% 0.02/0.29 % WCLimit : 300
% 0.02/0.29 % DateTime : Sat Sep 26 07:13:50 UTC 2026
% 0.02/0.30 % CPUTime :
% 0.02/0.30 % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.02/0.30 % Process 4173534 was started by sandbox2 on n012,
% 0.02/0.30 % Sat Sep 26 07:13:50 2026
% 0.02/0.30 % The command was "/export/starexec/sandbox2/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p".
% 0.02/0.30
% 0.02/0.30 % From the command line: assign(max_seconds, 300).
% 62.45/9.35
% 62.45/9.35 % given #500 (F,wt=29): 4669 intersection(cross_product(unordered_pair(A,A),universal_class),domain_of(flip(cross_product(intersection(cross_product(B,universal_class),C),universal_class)))) != null_class | -member(A,domain_of(domain_of(flip(cross_product(intersection(C,cross_product(B,universal_class)),universal_class))))). [para(361(a,1),225(b,2))].
% 62.45/9.35
% 62.45/9.35 % given #1000 (T,wt=11): 2133 member(null_class,intersection(universal_class,intersection(intersection(unordered_pair(null_class,A),omega),universal_class))). [resolve(904,a,463,a)].
% 62.45/9.35
% 62.45/9.35 % given #1500 (T,wt=11): 4598 member(null_class,intersection(intersection(unordered_pair(A,null_class),omega),unordered_pair(null_class,B))). [resolve(475,a,679,a)].
% 62.45/9.35
% 62.45/9.35 % given #2000 (T,wt=10): 40393 intersection(singleton_relation,complement(complement(compose(element_relation,complement(identity_relation))))) = null_class. [para(43(a,1),40390(a,1,1))].
% 62.45/9.35
% 62.45/9.35 % SZS status Unsatisfiable for theBenchmark
% 62.45/9.35
% 62.45/9.35 % Proof 1 at 7.01 (+ 1.97) seconds.
% 62.45/9.35 % Length of proof is 55.
% 62.45/9.35 % Level of proof is 13.
% 62.45/9.35 % Maximum clause weight is 17.000.
% 62.45/9.35 % Given clauses 2240.
% 62.45/9.35
% 62.45/9.35 % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------