%------------------------------------------------------------------------------
% File : CSE_E---1.7
% Problem : SET108-7 : TPTP v9.2.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : /export/starexec/sandbox2/solver/bin/lemma_parallel_prover %s --lemma-prover /export/starexec/sandbox2/solver/bin/cse --final-prover /export/starexec/sandbox2/solver/bin/eprover --proof-time %d --global-time-limit %d
% Computer : n018.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8042.1875MB
% OS : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Tue May 5 05:07:20 PM UTC 2026
% Result : Unsatisfiable 6.27s 4.54s
% Output : CNFRefutation 6.27s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 5
% Syntax : Number of clauses : 16 ( 13 unt; 0 nHn; 11 RR)
% Number of literals : 19 ( 9 equ; 6 neg)
% Maximal clause size : 2 ( 1 avg)
% Maximal term depth : 8 ( 2 avg)
% Number of predicates : 3 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 9 ( 9 usr; 3 con; 0-2 aty)
% Number of variables : 17 ( 6 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(ordered_pair,axiom,
unordered_pair(singleton(X1),unordered_pair(X1,singleton(X2))) = ordered_pair(X1,X2),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',ordered_pair) ).
cnf(singleton_set,axiom,
unordered_pair(X1,X1) = singleton(X1),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',singleton_set) ).
cnf(cartesian_product4,axiom,
( ordered_pair(first(X1),second(X1)) = X1
| ~ member(X1,cross_product(X2,X3)) ),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',cartesian_product4) ).
cnf(prove_existence_of_1st_and_2nd_1_1,negated_conjecture,
member(ordered_pair(y,z),cross_product(universal_class,universal_class)),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_existence_of_1st_and_2nd_1_1) ).
cnf(prove_existence_of_1st_and_2nd_1_2,negated_conjecture,
~ member(ordered_pair(first(ordered_pair(y,z)),second(ordered_pair(y,z))),cross_product(universal_class,universal_class)),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_existence_of_1st_and_2nd_1_2) ).
cnf(c_0_5,axiom,
unordered_pair(singleton(X1),unordered_pair(X1,singleton(X2))) = ordered_pair(X1,X2),
ordered_pair ).
cnf(c_0_6,axiom,
unordered_pair(X1,X1) = singleton(X1),
singleton_set ).
cnf(c_0_7,axiom,
( ordered_pair(first(X1),second(X1)) = X1
| ~ member(X1,cross_product(X2,X3)) ),
cartesian_product4 ).
cnf(c_0_8,plain,
unordered_pair(unordered_pair(X1,X1),unordered_pair(X1,unordered_pair(X2,X2))) = ordered_pair(X1,X2),
inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_5,c_0_6]),c_0_6]) ).
cnf(c_0_9,negated_conjecture,
member(ordered_pair(y,z),cross_product(universal_class,universal_class)),
prove_existence_of_1st_and_2nd_1_1 ).
cnf(c_0_10,negated_conjecture,
~ member(ordered_pair(first(ordered_pair(y,z)),second(ordered_pair(y,z))),cross_product(universal_class,universal_class)),
prove_existence_of_1st_and_2nd_1_2 ).
cnf(c_0_11,plain,
( unordered_pair(unordered_pair(first(X1),first(X1)),unordered_pair(first(X1),unordered_pair(second(X1),second(X1)))) = X1
| ~ member(X1,cross_product(X2,X3)) ),
inference(rw,[status(thm)],[c_0_7,c_0_8]) ).
cnf(c_0_12,negated_conjecture,
member(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z))),cross_product(universal_class,universal_class)),
inference(rw,[status(thm)],[c_0_9,c_0_8]) ).
cnf(c_0_13,negated_conjecture,
~ member(unordered_pair(unordered_pair(first(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z)))),first(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z))))),unordered_pair(first(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z)))),unordered_pair(second(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z)))),second(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z))))))),cross_product(universal_class,universal_class)),
inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_10,c_0_8]),c_0_8]),c_0_8]) ).
cnf(c_0_14,negated_conjecture,
unordered_pair(unordered_pair(first(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z)))),first(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z))))),unordered_pair(first(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z)))),unordered_pair(second(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z)))),second(unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z))))))) = unordered_pair(unordered_pair(y,y),unordered_pair(y,unordered_pair(z,z))),
inference(spm,[status(thm)],[c_0_11,c_0_12]) ).
cnf(c_0_15,negated_conjecture,
$false,
inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_13,c_0_14]),c_0_12])]),
[proof] ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.12 % Problem : SET108-7 : TPTP v9.2.1. Bugfixed v2.1.0.
% 0.00/0.12 % Command : /export/starexec/sandbox2/solver/bin/lemma_parallel_prover %s --lemma-prover /export/starexec/sandbox2/solver/bin/cse --final-prover /export/starexec/sandbox2/solver/bin/eprover --proof-time %d --global-time-limit %d
% 0.14/0.33 % Computer : n018.cluster.edu
% 0.14/0.33 % Model : x86_64 x86_64
% 0.14/0.33 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.33 % Memory : 8042.1875MB
% 0.14/0.33 % OS : Linux 3.10.0-693.el7.x86_64
% 0.14/0.33 % CPULimit : 300
% 0.14/0.33 % WCLimit : 300
% 0.14/0.33 % DateTime : Tue May 5 02:11:02 EDT 2026
% 0.14/0.33 % CPUTime :
% 0.14/0.34 % start to proof: theBenchmark
% 6.27/4.54 % Version : CSE_E---1.7
% 6.27/4.54 % Problem : theBenchmark.p
% 6.27/4.54 % SZS status Unsatisfiable for theBenchmark.p
% 6.27/4.54 % SZS output start CNFRefutation
% See solution above
% 6.27/4.56 % Total time : 3.373s
%------------------------------------------------------------------------------