TSTP Solution File: SET020-6 by CSE_E---1.5

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : CSE_E---1.5
% Problem  : SET020-6 : TPTP v8.1.2. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : java -jar /export/starexec/sandbox/solver/bin/mcs_scs.jar %d %s

% 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 : Thu Aug 31 14:32:13 EDT 2023

% Result   : Unsatisfiable 0.17s 0.69s
% Output   : CNFRefutation 0.17s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   16
%            Number of leaves      :   72
% Syntax   : Number of formulae    :  141 (  37 unt;  49 typ;   0 def)
%            Number of atoms       :  163 (  53 equ)
%            Maximal formula atoms :    3 (   1 avg)
%            Number of connectives :  139 (  68   ~;  71   |;   0   &)
%                                         (   0 <=>;   0  =>;   0  <=;   0 <~>)
%            Maximal formula depth :    4 (   2 avg)
%            Maximal term depth    :    8 (   2 avg)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :   65 (  39   >;  26   *;   0   +;   0  <<)
%            Number of predicates  :   11 (   9 usr;   1 prp; 0-3 aty)
%            Number of functors    :   40 (  40 usr;  10 con; 0-3 aty)
%            Number of variables   :  170 (  38 sgn;   0   !;   0   ?;   0   :)

% Comments : 
%------------------------------------------------------------------------------
tff(decl_22,type,
    subclass: ( $i * $i ) > $o ).

tff(decl_23,type,
    member: ( $i * $i ) > $o ).

tff(decl_24,type,
    not_subclass_element: ( $i * $i ) > $i ).

tff(decl_25,type,
    universal_class: $i ).

tff(decl_26,type,
    unordered_pair: ( $i * $i ) > $i ).

tff(decl_27,type,
    singleton: $i > $i ).

tff(decl_28,type,
    ordered_pair: ( $i * $i ) > $i ).

tff(decl_29,type,
    cross_product: ( $i * $i ) > $i ).

tff(decl_30,type,
    first: $i > $i ).

tff(decl_31,type,
    second: $i > $i ).

tff(decl_32,type,
    element_relation: $i ).

tff(decl_33,type,
    intersection: ( $i * $i ) > $i ).

tff(decl_34,type,
    complement: $i > $i ).

tff(decl_35,type,
    union: ( $i * $i ) > $i ).

tff(decl_36,type,
    symmetric_difference: ( $i * $i ) > $i ).

tff(decl_37,type,
    restrict: ( $i * $i * $i ) > $i ).

tff(decl_38,type,
    null_class: $i ).

tff(decl_39,type,
    domain_of: $i > $i ).

tff(decl_40,type,
    rotate: $i > $i ).

tff(decl_41,type,
    flip: $i > $i ).

tff(decl_42,type,
    inverse: $i > $i ).

tff(decl_43,type,
    range_of: $i > $i ).

tff(decl_44,type,
    domain: ( $i * $i * $i ) > $i ).

tff(decl_45,type,
    range: ( $i * $i * $i ) > $i ).

tff(decl_46,type,
    image: ( $i * $i ) > $i ).

tff(decl_47,type,
    successor: $i > $i ).

tff(decl_48,type,
    successor_relation: $i ).

tff(decl_49,type,
    inductive: $i > $o ).

tff(decl_50,type,
    omega: $i ).

tff(decl_51,type,
    sum_class: $i > $i ).

tff(decl_52,type,
    power_class: $i > $i ).

tff(decl_53,type,
    compose: ( $i * $i ) > $i ).

tff(decl_54,type,
    single_valued_class: $i > $o ).

tff(decl_55,type,
    identity_relation: $i ).

tff(decl_56,type,
    function: $i > $o ).

tff(decl_57,type,
    regular: $i > $i ).

tff(decl_58,type,
    apply: ( $i * $i ) > $i ).

tff(decl_59,type,
    choice: $i ).

tff(decl_60,type,
    one_to_one: $i > $o ).

tff(decl_61,type,
    subset_relation: $i ).

tff(decl_62,type,
    diagonalise: $i > $i ).

tff(decl_63,type,
    cantor: $i > $i ).

tff(decl_64,type,
    operation: $i > $o ).

tff(decl_65,type,
    compatible: ( $i * $i * $i ) > $o ).

tff(decl_66,type,
    homomorphism: ( $i * $i * $i ) > $o ).

tff(decl_67,type,
    not_homomorphism1: ( $i * $i * $i ) > $i ).

tff(decl_68,type,
    not_homomorphism2: ( $i * $i * $i ) > $i ).

tff(decl_69,type,
    u: $i ).

tff(decl_70,type,
    v: $i ).

cnf(intersection2,axiom,
    ( member(X1,X3)
    | ~ member(X1,intersection(X2,X3)) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',intersection2) ).

cnf(regularity1,axiom,
    ( X1 = null_class
    | member(regular(X1),X1) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',regularity1) ).

cnf(complement1,axiom,
    ( ~ member(X1,complement(X2))
    | ~ member(X1,X2) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',complement1) ).

cnf(restriction2,axiom,
    intersection(cross_product(X1,X2),X3) = restrict(X3,X1,X2),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',restriction2) ).

cnf(restriction1,axiom,
    intersection(X1,cross_product(X2,X3)) = restrict(X1,X2,X3),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',restriction1) ).

cnf(intersection1,axiom,
    ( member(X1,X2)
    | ~ member(X1,intersection(X2,X3)) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',intersection1) ).

cnf(domain1,axiom,
    ( restrict(X1,singleton(X2),universal_class) != null_class
    | ~ member(X2,domain_of(X1)) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',domain1) ).

cnf(singleton_set,axiom,
    unordered_pair(X1,X1) = singleton(X1),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',singleton_set) ).

cnf(ordered_pair,axiom,
    unordered_pair(singleton(X1),unordered_pair(X1,singleton(X2))) = ordered_pair(X1,X2),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',ordered_pair) ).

cnf(cartesian_product4,axiom,
    ( ordered_pair(first(X1),second(X1)) = X1
    | ~ member(X1,cross_product(X2,X3)) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',cartesian_product4) ).

cnf(prove_unique_1st_and_2nd_in_pair_of_sets1_1,negated_conjecture,
    member(ordered_pair(u,v),cross_product(universal_class,universal_class)),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_unique_1st_and_2nd_in_pair_of_sets1_1) ).

cnf(cartesian_product1,axiom,
    ( member(X1,X3)
    | ~ member(ordered_pair(X1,X2),cross_product(X3,X4)) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',cartesian_product1) ).

cnf(cartesian_product3,axiom,
    ( member(ordered_pair(X1,X3),cross_product(X2,X4))
    | ~ member(X1,X2)
    | ~ member(X3,X4) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',cartesian_product3) ).

cnf(cartesian_product2,axiom,
    ( member(X2,X4)
    | ~ member(ordered_pair(X1,X2),cross_product(X3,X4)) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',cartesian_product2) ).

cnf(unordered_pair_member,axiom,
    ( X1 = X2
    | X1 = X3
    | ~ member(X1,unordered_pair(X2,X3)) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',unordered_pair_member) ).

cnf(subclass_members,axiom,
    ( member(X3,X2)
    | ~ subclass(X1,X2)
    | ~ member(X3,X1) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',subclass_members) ).

cnf(unordered_pair2,axiom,
    ( member(X1,unordered_pair(X1,X2))
    | ~ member(X1,universal_class) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',unordered_pair2) ).

cnf(intersection3,axiom,
    ( member(X1,intersection(X2,X3))
    | ~ member(X1,X2)
    | ~ member(X1,X3) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',intersection3) ).

cnf(regularity2,axiom,
    ( X1 = null_class
    | intersection(X1,regular(X1)) = null_class ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',regularity2) ).

cnf(class_elements_are_sets,axiom,
    subclass(X1,universal_class),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',class_elements_are_sets) ).

cnf(complement2,axiom,
    ( member(X1,complement(X2))
    | member(X1,X2)
    | ~ member(X1,universal_class) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',complement2) ).

cnf(prove_unique_1st_and_2nd_in_pair_of_sets1_2,negated_conjecture,
    first(ordered_pair(u,v)) != u,
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_unique_1st_and_2nd_in_pair_of_sets1_2) ).

cnf(unordered_pairs_in_universal,axiom,
    member(unordered_pair(X1,X2),universal_class),
    file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',unordered_pairs_in_universal) ).

cnf(c_0_23,axiom,
    ( member(X1,X3)
    | ~ member(X1,intersection(X2,X3)) ),
    intersection2 ).

cnf(c_0_24,axiom,
    ( X1 = null_class
    | member(regular(X1),X1) ),
    regularity1 ).

cnf(c_0_25,axiom,
    ( ~ member(X1,complement(X2))
    | ~ member(X1,X2) ),
    complement1 ).

cnf(c_0_26,plain,
    ( intersection(X1,X2) = null_class
    | member(regular(intersection(X1,X2)),X2) ),
    inference(spm,[status(thm)],[c_0_23,c_0_24]) ).

cnf(c_0_27,axiom,
    intersection(cross_product(X1,X2),X3) = restrict(X3,X1,X2),
    restriction2 ).

cnf(c_0_28,axiom,
    intersection(X1,cross_product(X2,X3)) = restrict(X1,X2,X3),
    restriction1 ).

cnf(c_0_29,axiom,
    ( member(X1,X2)
    | ~ member(X1,intersection(X2,X3)) ),
    intersection1 ).

cnf(c_0_30,axiom,
    ( restrict(X1,singleton(X2),universal_class) != null_class
    | ~ member(X2,domain_of(X1)) ),
    domain1 ).

cnf(c_0_31,axiom,
    unordered_pair(X1,X1) = singleton(X1),
    singleton_set ).

cnf(c_0_32,plain,
    ( intersection(X1,complement(X2)) = null_class
    | ~ member(regular(intersection(X1,complement(X2))),X2) ),
    inference(spm,[status(thm)],[c_0_25,c_0_26]) ).

cnf(c_0_33,plain,
    intersection(cross_product(X1,X2),X3) = intersection(X3,cross_product(X1,X2)),
    inference(rw,[status(thm)],[c_0_27,c_0_28]) ).

cnf(c_0_34,plain,
    ( intersection(X1,X2) = null_class
    | member(regular(intersection(X1,X2)),X1) ),
    inference(spm,[status(thm)],[c_0_29,c_0_24]) ).

cnf(c_0_35,plain,
    ( intersection(X1,cross_product(unordered_pair(X2,X2),universal_class)) != null_class
    | ~ member(X2,domain_of(X1)) ),
    inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_30,c_0_31]),c_0_28]) ).

cnf(c_0_36,plain,
    ( intersection(complement(X1),cross_product(X2,X3)) = null_class
    | ~ member(regular(intersection(complement(X1),cross_product(X2,X3))),X1) ),
    inference(spm,[status(thm)],[c_0_32,c_0_33]) ).

cnf(c_0_37,plain,
    intersection(X1,complement(X1)) = null_class,
    inference(spm,[status(thm)],[c_0_32,c_0_34]) ).

cnf(c_0_38,axiom,
    unordered_pair(singleton(X1),unordered_pair(X1,singleton(X2))) = ordered_pair(X1,X2),
    ordered_pair ).

cnf(c_0_39,plain,
    ( intersection(cross_product(unordered_pair(X1,X1),universal_class),X2) != null_class
    | ~ member(X1,domain_of(X2)) ),
    inference(spm,[status(thm)],[c_0_35,c_0_33]) ).

cnf(c_0_40,plain,
    intersection(cross_product(X1,X2),complement(cross_product(X1,X2))) = null_class,
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_36,c_0_26]),c_0_33]) ).

cnf(c_0_41,plain,
    ( member(X1,X2)
    | ~ member(X1,null_class) ),
    inference(spm,[status(thm)],[c_0_29,c_0_37]) ).

cnf(c_0_42,axiom,
    ( ordered_pair(first(X1),second(X1)) = X1
    | ~ member(X1,cross_product(X2,X3)) ),
    cartesian_product4 ).

cnf(c_0_43,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_38,c_0_31]),c_0_31]) ).

cnf(c_0_44,negated_conjecture,
    member(ordered_pair(u,v),cross_product(universal_class,universal_class)),
    prove_unique_1st_and_2nd_in_pair_of_sets1_1 ).

cnf(c_0_45,plain,
    ~ member(X1,domain_of(complement(cross_product(unordered_pair(X1,X1),universal_class)))),
    inference(spm,[status(thm)],[c_0_39,c_0_40]) ).

cnf(c_0_46,plain,
    ( intersection(X1,null_class) = null_class
    | member(regular(intersection(X1,null_class)),X2) ),
    inference(spm,[status(thm)],[c_0_41,c_0_26]) ).

cnf(c_0_47,axiom,
    ( member(X1,X3)
    | ~ member(ordered_pair(X1,X2),cross_product(X3,X4)) ),
    cartesian_product1 ).

cnf(c_0_48,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_42,c_0_43]) ).

cnf(c_0_49,negated_conjecture,
    member(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v))),cross_product(universal_class,universal_class)),
    inference(rw,[status(thm)],[c_0_44,c_0_43]) ).

cnf(c_0_50,plain,
    intersection(X1,null_class) = null_class,
    inference(spm,[status(thm)],[c_0_45,c_0_46]) ).

cnf(c_0_51,plain,
    ( member(X1,X3)
    | ~ member(unordered_pair(unordered_pair(X1,X1),unordered_pair(X1,unordered_pair(X2,X2))),cross_product(X3,X4)) ),
    inference(rw,[status(thm)],[c_0_47,c_0_43]) ).

cnf(c_0_52,negated_conjecture,
    unordered_pair(unordered_pair(first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v))))),unordered_pair(first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),unordered_pair(second(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),second(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v))))))) = unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v))),
    inference(spm,[status(thm)],[c_0_48,c_0_49]) ).

cnf(c_0_53,axiom,
    ( member(ordered_pair(X1,X3),cross_product(X2,X4))
    | ~ member(X1,X2)
    | ~ member(X3,X4) ),
    cartesian_product3 ).

cnf(c_0_54,axiom,
    ( member(X2,X4)
    | ~ member(ordered_pair(X1,X2),cross_product(X3,X4)) ),
    cartesian_product2 ).

cnf(c_0_55,plain,
    ~ member(X1,domain_of(null_class)),
    inference(spm,[status(thm)],[c_0_39,c_0_50]) ).

cnf(c_0_56,negated_conjecture,
    ( member(first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),X1)
    | ~ member(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v))),cross_product(X1,X2)) ),
    inference(spm,[status(thm)],[c_0_51,c_0_52]) ).

cnf(c_0_57,plain,
    ( member(unordered_pair(unordered_pair(X1,X1),unordered_pair(X1,unordered_pair(X3,X3))),cross_product(X2,X4))
    | ~ member(X3,X4)
    | ~ member(X1,X2) ),
    inference(rw,[status(thm)],[c_0_53,c_0_43]) ).

cnf(c_0_58,plain,
    ( member(X2,X4)
    | ~ member(unordered_pair(unordered_pair(X1,X1),unordered_pair(X1,unordered_pair(X2,X2))),cross_product(X3,X4)) ),
    inference(rw,[status(thm)],[c_0_54,c_0_43]) ).

cnf(c_0_59,plain,
    domain_of(null_class) = null_class,
    inference(spm,[status(thm)],[c_0_55,c_0_24]) ).

cnf(c_0_60,axiom,
    ( X1 = X2
    | X1 = X3
    | ~ member(X1,unordered_pair(X2,X3)) ),
    unordered_pair_member ).

cnf(c_0_61,axiom,
    ( member(X3,X2)
    | ~ subclass(X1,X2)
    | ~ member(X3,X1) ),
    subclass_members ).

cnf(c_0_62,negated_conjecture,
    ( member(first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),X1)
    | ~ member(v,X2)
    | ~ member(u,X1) ),
    inference(spm,[status(thm)],[c_0_56,c_0_57]) ).

cnf(c_0_63,axiom,
    ( member(X1,unordered_pair(X1,X2))
    | ~ member(X1,universal_class) ),
    unordered_pair2 ).

cnf(c_0_64,negated_conjecture,
    member(v,universal_class),
    inference(spm,[status(thm)],[c_0_58,c_0_49]) ).

cnf(c_0_65,axiom,
    ( member(X1,intersection(X2,X3))
    | ~ member(X1,X2)
    | ~ member(X1,X3) ),
    intersection3 ).

cnf(c_0_66,axiom,
    ( X1 = null_class
    | intersection(X1,regular(X1)) = null_class ),
    regularity2 ).

cnf(c_0_67,plain,
    ~ member(X1,null_class),
    inference(rw,[status(thm)],[c_0_55,c_0_59]) ).

cnf(c_0_68,plain,
    ( regular(unordered_pair(X1,X2)) = X1
    | regular(unordered_pair(X1,X2)) = X2
    | unordered_pair(X1,X2) = null_class ),
    inference(spm,[status(thm)],[c_0_60,c_0_24]) ).

cnf(c_0_69,plain,
    ( X1 = null_class
    | member(regular(X1),X2)
    | ~ subclass(X1,X2) ),
    inference(spm,[status(thm)],[c_0_61,c_0_24]) ).

cnf(c_0_70,axiom,
    subclass(X1,universal_class),
    class_elements_are_sets ).

cnf(c_0_71,negated_conjecture,
    ( member(first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),X1)
    | ~ member(u,X1) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_62,c_0_63]),c_0_64])]) ).

cnf(c_0_72,plain,
    ( X1 = null_class
    | ~ member(X2,regular(X1))
    | ~ member(X2,X1) ),
    inference(sr,[status(thm)],[inference(spm,[status(thm)],[c_0_65,c_0_66]),c_0_67]) ).

cnf(c_0_73,plain,
    ( regular(unordered_pair(X1,X1)) = X1
    | unordered_pair(X1,X1) = null_class ),
    inference(er,[status(thm)],[inference(ef,[status(thm)],[c_0_68])]) ).

cnf(c_0_74,plain,
    ( X1 = null_class
    | member(regular(X1),universal_class) ),
    inference(spm,[status(thm)],[c_0_69,c_0_70]) ).

cnf(c_0_75,negated_conjecture,
    ( ~ member(first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),X1)
    | ~ member(u,complement(X1)) ),
    inference(spm,[status(thm)],[c_0_25,c_0_71]) ).

cnf(c_0_76,negated_conjecture,
    member(first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),universal_class),
    inference(spm,[status(thm)],[c_0_56,c_0_49]) ).

cnf(c_0_77,axiom,
    ( member(X1,complement(X2))
    | member(X1,X2)
    | ~ member(X1,universal_class) ),
    complement2 ).

cnf(c_0_78,negated_conjecture,
    member(u,universal_class),
    inference(spm,[status(thm)],[c_0_51,c_0_49]) ).

cnf(c_0_79,plain,
    ( unordered_pair(X1,X1) = null_class
    | ~ member(X2,unordered_pair(X1,X1))
    | ~ member(X2,X1) ),
    inference(spm,[status(thm)],[c_0_72,c_0_73]) ).

cnf(c_0_80,plain,
    ( unordered_pair(X1,X1) = null_class
    | member(X1,universal_class) ),
    inference(spm,[status(thm)],[c_0_74,c_0_73]) ).

cnf(c_0_81,negated_conjecture,
    ~ member(u,complement(unordered_pair(first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),X1))),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_75,c_0_63]),c_0_76])]) ).

cnf(c_0_82,negated_conjecture,
    ( member(u,complement(X1))
    | member(u,X1) ),
    inference(spm,[status(thm)],[c_0_77,c_0_78]) ).

cnf(c_0_83,negated_conjecture,
    first(ordered_pair(u,v)) != u,
    prove_unique_1st_and_2nd_in_pair_of_sets1_2 ).

cnf(c_0_84,plain,
    ( unordered_pair(X1,X1) = null_class
    | ~ member(X1,X1) ),
    inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_79,c_0_63]),c_0_80]) ).

cnf(c_0_85,negated_conjecture,
    member(u,unordered_pair(first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))),X1)),
    inference(spm,[status(thm)],[c_0_81,c_0_82]) ).

cnf(c_0_86,negated_conjecture,
    first(unordered_pair(unordered_pair(u,u),unordered_pair(u,unordered_pair(v,v)))) != u,
    inference(rw,[status(thm)],[c_0_83,c_0_43]) ).

cnf(c_0_87,plain,
    unordered_pair(universal_class,universal_class) = null_class,
    inference(spm,[status(thm)],[c_0_84,c_0_80]) ).

cnf(c_0_88,axiom,
    member(unordered_pair(X1,X2),universal_class),
    unordered_pairs_in_universal ).

cnf(c_0_89,negated_conjecture,
    u = X1,
    inference(sr,[status(thm)],[inference(spm,[status(thm)],[c_0_60,c_0_85]),c_0_86]) ).

cnf(c_0_90,plain,
    ~ member(universal_class,universal_class),
    inference(sr,[status(thm)],[inference(spm,[status(thm)],[c_0_63,c_0_87]),c_0_67]) ).

cnf(c_0_91,plain,
    $false,
    inference(sr,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_88,c_0_89]),c_0_89]),c_0_90]),
    [proof] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.11/0.12  % Problem    : SET020-6 : TPTP v8.1.2. Bugfixed v2.1.0.
% 0.13/0.13  % Command    : java -jar /export/starexec/sandbox/solver/bin/mcs_scs.jar %d %s
% 0.13/0.32  % Computer : n018.cluster.edu
% 0.13/0.32  % Model    : x86_64 x86_64
% 0.13/0.32  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.32  % Memory   : 8042.1875MB
% 0.13/0.32  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.13/0.32  % CPULimit   : 300
% 0.13/0.32  % WCLimit    : 300
% 0.13/0.32  % DateTime   : Sat Aug 26 10:24:44 EDT 2023
% 0.13/0.32  % CPUTime  : 
% 0.17/0.53  start to proof: theBenchmark
% 0.17/0.69  % Version  : CSE_E---1.5
% 0.17/0.69  % Problem  : theBenchmark.p
% 0.17/0.69  % Proof found
% 0.17/0.69  % SZS status Theorem for theBenchmark.p
% 0.17/0.69  % SZS output start Proof
% See solution above
% 0.17/0.70  % Total time : 0.145000 s
% 0.17/0.70  % SZS output end Proof
% 0.17/0.70  % Total time : 0.150000 s
%------------------------------------------------------------------------------