TSTP Solution File: SET082-7 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : SET082-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n020.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  : 0s
% DateTime : Mon Jul 18 22:46:45 EDT 2022

% Result   : Unsatisfiable 2.20s 2.57s
% Output   : Refutation 2.20s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12  % Problem  : SET082-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.07/0.12  % Command  : bliksem %s
% 0.12/0.33  % Computer : n020.cluster.edu
% 0.12/0.33  % Model    : x86_64 x86_64
% 0.12/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33  % Memory   : 8042.1875MB
% 0.12/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33  % CPULimit : 300
% 0.12/0.33  % DateTime : Mon Jul 11 05:18:43 EDT 2022
% 0.12/0.33  % CPUTime  : 
% 0.71/1.10  *** allocated 10000 integers for termspace/termends
% 0.71/1.10  *** allocated 10000 integers for clauses
% 0.71/1.10  *** allocated 10000 integers for justifications
% 0.71/1.10  Bliksem 1.12
% 0.71/1.10  
% 0.71/1.10  
% 0.71/1.10  Automatic Strategy Selection
% 0.71/1.10  
% 0.71/1.10  Clauses:
% 0.71/1.10  [
% 0.71/1.10     [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ],
% 0.71/1.10     [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y ) ],
% 0.71/1.10     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), subclass( X, Y ) ]
% 0.71/1.10    ,
% 0.71/1.10     [ subclass( X, 'universal_class' ) ],
% 0.71/1.10     [ ~( =( X, Y ) ), subclass( X, Y ) ],
% 0.71/1.10     [ ~( =( X, Y ) ), subclass( Y, X ) ],
% 0.71/1.10     [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ],
% 0.71/1.10     [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z ) ]
% 0.71/1.10    ,
% 0.71/1.10     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( X, Y
% 0.71/1.10     ) ) ],
% 0.71/1.10     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( Y, X
% 0.71/1.10     ) ) ],
% 0.71/1.10     [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ],
% 0.71/1.10     [ =( 'unordered_pair'( X, X ), singleton( X ) ) ],
% 0.71/1.10     [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, singleton( Y
% 0.71/1.10     ) ) ), 'ordered_pair'( X, Y ) ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.71/1.10    X, Z ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.71/1.10    Y, T ) ],
% 0.71/1.10     [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 'ordered_pair'( X, Z
% 0.71/1.10     ), 'cross_product'( Y, T ) ) ],
% 0.71/1.10     [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 'ordered_pair'( first( X
% 0.71/1.10     ), second( X ) ), X ) ],
% 0.71/1.10     [ subclass( 'element_relation', 'cross_product'( 'universal_class', 
% 0.71/1.10    'universal_class' ) ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) ), member( X, 
% 0.71/1.10    Y ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 'universal_class'
% 0.71/1.10    , 'universal_class' ) ) ), ~( member( X, Y ) ), member( 'ordered_pair'( X
% 0.71/1.10    , Y ), 'element_relation' ) ],
% 0.71/1.10     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ],
% 0.71/1.10     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ],
% 0.71/1.10     [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, intersection( Y, 
% 0.71/1.10    Z ) ) ],
% 0.71/1.10     [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ],
% 0.71/1.10     [ ~( member( X, 'universal_class' ) ), member( X, complement( Y ) ), 
% 0.71/1.10    member( X, Y ) ],
% 0.71/1.10     [ =( complement( intersection( complement( X ), complement( Y ) ) ), 
% 0.71/1.10    union( X, Y ) ) ],
% 0.71/1.10     [ =( intersection( complement( intersection( X, Y ) ), complement( 
% 0.71/1.10    intersection( complement( X ), complement( Y ) ) ) ), 
% 0.71/1.10    'symmetric_difference'( X, Y ) ) ],
% 0.71/1.10     [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( X, Y, Z ) ) ]
% 0.71/1.10    ,
% 0.71/1.10     [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( Z, X, Y ) ) ]
% 0.71/1.10    ,
% 0.71/1.10     [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 'null_class' )
% 0.71/1.10     ), ~( member( Y, 'domain_of'( X ) ) ) ],
% 0.71/1.10     [ ~( member( X, 'universal_class' ) ), =( restrict( Y, singleton( X ), 
% 0.71/1.10    'universal_class' ), 'null_class' ), member( X, 'domain_of'( Y ) ) ],
% 0.71/1.10     [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.71/1.10    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), rotate( T ) )
% 0.71/1.10     ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.71/1.10    member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 'cross_product'( 
% 0.71/1.10    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.71/1.10    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X ), 
% 0.71/1.10    Y ), rotate( T ) ) ],
% 0.71/1.10     [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.71/1.10    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), flip( T ) ) )
% 0.71/1.10    , member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.71/1.10    member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 'cross_product'( 
% 0.71/1.10    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.71/1.10    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), 
% 0.71/1.10    Z ), flip( T ) ) ],
% 0.71/1.10     [ =( 'domain_of'( flip( 'cross_product'( X, 'universal_class' ) ) ), 
% 0.71/1.10    inverse( X ) ) ],
% 0.71/1.10     [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ],
% 0.71/1.10     [ =( first( 'not_subclass_element'( restrict( X, Y, singleton( Z ) ), 
% 0.71/1.10    'null_class' ) ), domain( X, Y, Z ) ) ],
% 0.71/1.10     [ =( second( 'not_subclass_element'( restrict( X, singleton( Y ), Z ), 
% 0.71/1.10    'null_class' ) ), range( X, Y, Z ) ) ],
% 0.71/1.10     [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), image( X, Y ) )
% 0.71/1.10     ],
% 0.71/1.10     [ =( union( X, singleton( X ) ), successor( X ) ) ],
% 0.71/1.10     [ subclass( 'successor_relation', 'cross_product'( 'universal_class', 
% 0.71/1.10    'universal_class' ) ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' ) ), =( 
% 0.71/1.10    successor( X ), Y ) ],
% 0.71/1.10     [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X, Y ), 
% 0.71/1.10    'cross_product'( 'universal_class', 'universal_class' ) ) ), member( 
% 0.71/1.10    'ordered_pair'( X, Y ), 'successor_relation' ) ],
% 0.71/1.10     [ ~( inductive( X ) ), member( 'null_class', X ) ],
% 0.71/1.10     [ ~( inductive( X ) ), subclass( image( 'successor_relation', X ), X ) ]
% 0.71/1.10    ,
% 0.71/1.10     [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.71/1.10    'successor_relation', X ), X ) ), inductive( X ) ],
% 0.71/1.10     [ inductive( omega ) ],
% 0.71/1.10     [ ~( inductive( X ) ), subclass( omega, X ) ],
% 0.71/1.10     [ member( omega, 'universal_class' ) ],
% 0.71/1.10     [ =( 'domain_of'( restrict( 'element_relation', 'universal_class', X ) )
% 0.71/1.10    , 'sum_class'( X ) ) ],
% 0.71/1.10     [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( X ), 
% 0.71/1.10    'universal_class' ) ],
% 0.71/1.10     [ =( complement( image( 'element_relation', complement( X ) ) ), 
% 0.71/1.10    'power_class'( X ) ) ],
% 0.71/1.10     [ ~( member( X, 'universal_class' ) ), member( 'power_class'( X ), 
% 0.71/1.10    'universal_class' ) ],
% 0.71/1.10     [ subclass( compose( X, Y ), 'cross_product'( 'universal_class', 
% 0.71/1.10    'universal_class' ) ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), member( Y, 
% 0.71/1.10    image( Z, image( T, singleton( X ) ) ) ) ],
% 0.71/1.10     [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) ), ~( member( 
% 0.71/1.10    'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.71/1.10    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.71/1.10     ) ],
% 0.71/1.10     [ ~( 'single_valued_class'( X ) ), subclass( compose( X, inverse( X ) )
% 0.71/1.10    , 'identity_relation' ) ],
% 0.71/1.10     [ ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) ), 
% 0.71/1.10    'single_valued_class'( X ) ],
% 0.71/1.10     [ ~( function( X ) ), subclass( X, 'cross_product'( 'universal_class', 
% 0.71/1.10    'universal_class' ) ) ],
% 0.71/1.10     [ ~( function( X ) ), subclass( compose( X, inverse( X ) ), 
% 0.71/1.10    'identity_relation' ) ],
% 0.71/1.10     [ ~( subclass( X, 'cross_product'( 'universal_class', 'universal_class'
% 0.71/1.10     ) ) ), ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) )
% 0.71/1.10    , function( X ) ],
% 0.71/1.10     [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), member( image( 
% 0.71/1.10    X, Y ), 'universal_class' ) ],
% 0.71/1.10     [ =( X, 'null_class' ), member( regular( X ), X ) ],
% 0.71/1.10     [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 'null_class'
% 0.71/1.10     ) ],
% 0.71/1.10     [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y ) ) ],
% 0.71/1.10     [ function( choice ) ],
% 0.71/1.10     [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' ), member( 
% 0.71/1.10    apply( choice, X ), X ) ],
% 0.71/1.10     [ ~( 'one_to_one'( X ) ), function( X ) ],
% 0.71/1.10     [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ],
% 0.71/1.10     [ ~( function( inverse( X ) ) ), ~( function( X ) ), 'one_to_one'( X ) ]
% 0.71/1.10    ,
% 0.71/1.10     [ =( intersection( 'cross_product'( 'universal_class', 'universal_class'
% 0.71/1.10     ), intersection( 'cross_product'( 'universal_class', 'universal_class' )
% 0.71/1.10    , complement( compose( complement( 'element_relation' ), inverse( 
% 0.71/1.10    'element_relation' ) ) ) ) ), 'subset_relation' ) ],
% 0.71/1.10     [ =( intersection( inverse( 'subset_relation' ), 'subset_relation' ), 
% 0.71/1.10    'identity_relation' ) ],
% 0.71/1.10     [ =( complement( 'domain_of'( intersection( X, 'identity_relation' ) ) )
% 0.71/1.10    , diagonalise( X ) ) ],
% 0.71/1.10     [ =( intersection( 'domain_of'( X ), diagonalise( compose( inverse( 
% 0.71/1.10    'element_relation' ), X ) ) ), cantor( X ) ) ],
% 0.71/1.10     [ ~( operation( X ) ), function( X ) ],
% 0.71/1.10     [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 'domain_of'( X )
% 0.71/1.10     ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ],
% 0.71/1.10     [ ~( operation( X ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.71/1.10    'domain_of'( X ) ) ) ],
% 0.71/1.10     [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 'domain_of'( X
% 0.71/1.10     ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ), ~( 
% 0.71/1.10    subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), operation( 
% 0.71/1.10    X ) ],
% 0.71/1.10     [ ~( compatible( X, Y, Z ) ), function( X ) ],
% 0.71/1.10     [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( Y ) ), 
% 0.71/1.10    'domain_of'( X ) ) ],
% 0.71/1.10     [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.71/1.10    'domain_of'( Z ) ) ) ],
% 0.71/1.10     [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) ), 'domain_of'( 
% 0.71/1.10    X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( Z ) ) )
% 0.71/1.10     ), compatible( X, Y, Z ) ],
% 0.71/1.10     [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ],
% 0.71/1.10     [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ],
% 0.71/1.10     [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ],
% 0.71/1.10     [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( T, U ), 
% 0.71/1.10    'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T ), apply( 
% 0.71/1.10    X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ],
% 0.71/1.10     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.71/1.10    member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 0.71/1.10    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 0.71/1.10    , Y ) ],
% 0.71/1.10     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.71/1.10    ~( =( apply( Y, 'ordered_pair'( apply( Z, 'not_homomorphism1'( Z, X, Y )
% 0.71/1.10     ), apply( Z, 'not_homomorphism2'( Z, X, Y ) ) ) ), apply( Z, apply( X, 
% 0.71/1.10    'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 'not_homomorphism2'( Z, X
% 0.71/1.10    , Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.71/1.10    X, 'unordered_pair'( X, Y ) ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.71/1.10    Y, 'unordered_pair'( X, Y ) ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.71/1.10    X, 'universal_class' ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.71/1.10    Y, 'universal_class' ) ],
% 0.71/1.10     [ subclass( X, X ) ],
% 0.71/1.10     [ ~( subclass( X, Y ) ), ~( subclass( Y, Z ) ), subclass( X, Z ) ],
% 0.71/1.10     [ =( X, Y ), member( 'not_subclass_element'( X, Y ), X ), member( 
% 0.71/1.10    'not_subclass_element'( Y, X ), Y ) ],
% 0.71/1.10     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( X, Y ), member( 
% 0.71/1.10    'not_subclass_element'( Y, X ), Y ) ],
% 0.71/1.10     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( Y, X ), member( 
% 0.71/1.10    'not_subclass_element'( Y, X ), Y ) ],
% 0.71/1.10     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), ~( member( 
% 0.71/1.10    'not_subclass_element'( Y, X ), X ) ), =( X, Y ) ],
% 0.71/1.10     [ ~( member( X, intersection( complement( Y ), Y ) ) ) ],
% 0.71/1.10     [ ~( member( X, 'null_class' ) ) ],
% 0.71/1.10     [ subclass( 'null_class', X ) ],
% 0.71/1.10     [ ~( subclass( X, 'null_class' ) ), =( X, 'null_class' ) ],
% 0.71/1.10     [ =( X, 'null_class' ), member( 'not_subclass_element'( X, 'null_class'
% 0.71/1.10     ), X ) ],
% 0.71/1.10     [ member( 'null_class', 'universal_class' ) ],
% 0.71/1.10     [ =( 'unordered_pair'( X, Y ), 'unordered_pair'( Y, X ) ) ],
% 0.71/1.10     [ subclass( singleton( X ), 'unordered_pair'( X, Y ) ) ],
% 0.71/1.10     [ subclass( singleton( X ), 'unordered_pair'( Y, X ) ) ],
% 0.71/1.10     [ member( X, 'universal_class' ), =( 'unordered_pair'( Y, X ), singleton( 
% 0.71/1.10    Y ) ) ],
% 0.71/1.10     [ member( X, 'universal_class' ), =( 'unordered_pair'( X, Y ), singleton( 
% 0.71/1.10    Y ) ) ],
% 0.71/1.10     [ =( 'unordered_pair'( X, Y ), 'null_class' ), member( X, 
% 0.71/1.10    'universal_class' ), member( Y, 'universal_class' ) ],
% 0.71/1.10     [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( X, Z ) ) ), ~( 
% 0.71/1.10    member( 'ordered_pair'( Y, Z ), 'cross_product'( 'universal_class', 
% 0.71/1.10    'universal_class' ) ) ), =( Y, Z ) ],
% 0.71/1.10     [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( Z, Y ) ) ), ~( 
% 0.71/1.10    member( 'ordered_pair'( X, Z ), 'cross_product'( 'universal_class', 
% 0.71/1.10    'universal_class' ) ) ), =( X, Z ) ],
% 0.71/1.10     [ ~( member( X, 'universal_class' ) ), ~( =( 'unordered_pair'( X, Y ), 
% 0.71/1.10    'null_class' ) ) ],
% 0.71/1.10     [ ~( member( X, 'universal_class' ) ), ~( =( 'unordered_pair'( Y, X ), 
% 0.71/1.10    'null_class' ) ) ],
% 0.71/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), ~( =( 
% 0.71/1.10    'unordered_pair'( X, Y ), 'null_class' ) ) ],
% 2.13/2.57     [ ~( member( X, Y ) ), ~( member( Z, Y ) ), subclass( 'unordered_pair'( 
% 2.13/2.57    X, Z ), Y ) ],
% 2.13/2.57     [ member( singleton( X ), 'universal_class' ) ],
% 2.13/2.57     [ member( singleton( X ), 'unordered_pair'( Y, singleton( X ) ) ) ],
% 2.13/2.57     [ ~( member( X, 'universal_class' ) ), member( X, singleton( X ) ) ]
% 2.13/2.57    ,
% 2.13/2.57     [ ~( member( X, 'universal_class' ) ), ~( =( singleton( X ), 
% 2.13/2.57    'null_class' ) ) ],
% 2.13/2.57     [ member( 'null_class', singleton( 'null_class' ) ) ],
% 2.13/2.57     [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ],
% 2.13/2.57     [ ~( member( x, 'universal_class' ) ) ],
% 2.13/2.57     [ ~( =( singleton( x ), 'null_class' ) ) ]
% 2.13/2.57  ] .
% 2.13/2.57  
% 2.13/2.57  
% 2.13/2.57  percentage equality = 0.236948, percentage horn = 0.881890
% 2.13/2.57  This is a problem with some equality
% 2.13/2.57  
% 2.13/2.57  
% 2.13/2.57  
% 2.13/2.57  Options Used:
% 2.13/2.57  
% 2.13/2.57  useres =            1
% 2.13/2.57  useparamod =        1
% 2.13/2.57  useeqrefl =         1
% 2.13/2.57  useeqfact =         1
% 2.13/2.57  usefactor =         1
% 2.13/2.57  usesimpsplitting =  0
% 2.13/2.57  usesimpdemod =      5
% 2.13/2.57  usesimpres =        3
% 2.13/2.57  
% 2.13/2.57  resimpinuse      =  1000
% 2.13/2.57  resimpclauses =     20000
% 2.13/2.57  substype =          eqrewr
% 2.13/2.57  backwardsubs =      1
% 2.13/2.57  selectoldest =      5
% 2.13/2.57  
% 2.13/2.57  litorderings [0] =  split
% 2.13/2.57  litorderings [1] =  extend the termordering, first sorting on arguments
% 2.13/2.57  
% 2.13/2.57  termordering =      kbo
% 2.13/2.57  
% 2.13/2.57  litapriori =        0
% 2.13/2.57  termapriori =       1
% 2.13/2.57  litaposteriori =    0
% 2.13/2.57  termaposteriori =   0
% 2.13/2.57  demodaposteriori =  0
% 2.13/2.57  ordereqreflfact =   0
% 2.13/2.57  
% 2.13/2.57  litselect =         negord
% 2.13/2.57  
% 2.13/2.57  maxweight =         15
% 2.13/2.57  maxdepth =          30000
% 2.13/2.57  maxlength =         115
% 2.13/2.57  maxnrvars =         195
% 2.13/2.57  excuselevel =       1
% 2.13/2.57  increasemaxweight = 1
% 2.13/2.57  
% 2.13/2.57  maxselected =       10000000
% 2.13/2.57  maxnrclauses =      10000000
% 2.13/2.57  
% 2.13/2.57  showgenerated =    0
% 2.13/2.57  showkept =         0
% 2.13/2.57  showselected =     0
% 2.13/2.57  showdeleted =      0
% 2.13/2.57  showresimp =       1
% 2.13/2.57  showstatus =       2000
% 2.13/2.57  
% 2.13/2.57  prologoutput =     1
% 2.13/2.57  nrgoals =          5000000
% 2.13/2.57  totalproof =       1
% 2.13/2.57  
% 2.13/2.57  Symbols occurring in the translation:
% 2.13/2.57  
% 2.13/2.57  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 2.13/2.57  .  [1, 2]      (w:1, o:55, a:1, s:1, b:0), 
% 2.13/2.57  !  [4, 1]      (w:0, o:30, a:1, s:1, b:0), 
% 2.13/2.57  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 2.13/2.57  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 2.13/2.57  subclass  [41, 2]      (w:1, o:80, a:1, s:1, b:0), 
% 2.13/2.57  member  [43, 2]      (w:1, o:81, a:1, s:1, b:0), 
% 2.20/2.57  'not_subclass_element'  [44, 2]      (w:1, o:82, a:1, s:1, b:0), 
% 2.20/2.57  'universal_class'  [45, 0]      (w:1, o:21, a:1, s:1, b:0), 
% 2.20/2.57  'unordered_pair'  [46, 2]      (w:1, o:83, a:1, s:1, b:0), 
% 2.20/2.57  singleton  [47, 1]      (w:1, o:38, a:1, s:1, b:0), 
% 2.20/2.57  'ordered_pair'  [48, 2]      (w:1, o:84, a:1, s:1, b:0), 
% 2.20/2.57  'cross_product'  [50, 2]      (w:1, o:85, a:1, s:1, b:0), 
% 2.20/2.57  first  [52, 1]      (w:1, o:39, a:1, s:1, b:0), 
% 2.20/2.57  second  [53, 1]      (w:1, o:40, a:1, s:1, b:0), 
% 2.20/2.57  'element_relation'  [54, 0]      (w:1, o:25, a:1, s:1, b:0), 
% 2.20/2.57  intersection  [55, 2]      (w:1, o:87, a:1, s:1, b:0), 
% 2.20/2.57  complement  [56, 1]      (w:1, o:41, a:1, s:1, b:0), 
% 2.20/2.57  union  [57, 2]      (w:1, o:88, a:1, s:1, b:0), 
% 2.20/2.57  'symmetric_difference'  [58, 2]      (w:1, o:89, a:1, s:1, b:0), 
% 2.20/2.57  restrict  [60, 3]      (w:1, o:92, a:1, s:1, b:0), 
% 2.20/2.57  'null_class'  [61, 0]      (w:1, o:26, a:1, s:1, b:0), 
% 2.20/2.57  'domain_of'  [62, 1]      (w:1, o:43, a:1, s:1, b:0), 
% 2.20/2.57  rotate  [63, 1]      (w:1, o:35, a:1, s:1, b:0), 
% 2.20/2.57  flip  [65, 1]      (w:1, o:44, a:1, s:1, b:0), 
% 2.20/2.57  inverse  [66, 1]      (w:1, o:45, a:1, s:1, b:0), 
% 2.20/2.57  'range_of'  [67, 1]      (w:1, o:36, a:1, s:1, b:0), 
% 2.20/2.57  domain  [68, 3]      (w:1, o:94, a:1, s:1, b:0), 
% 2.20/2.57  range  [69, 3]      (w:1, o:95, a:1, s:1, b:0), 
% 2.20/2.57  image  [70, 2]      (w:1, o:86, a:1, s:1, b:0), 
% 2.20/2.57  successor  [71, 1]      (w:1, o:46, a:1, s:1, b:0), 
% 2.20/2.57  'successor_relation'  [72, 0]      (w:1, o:6, a:1, s:1, b:0), 
% 2.20/2.57  inductive  [73, 1]      (w:1, o:47, a:1, s:1, b:0), 
% 2.20/2.57  omega  [74, 0]      (w:1, o:9, a:1, s:1, b:0), 
% 2.20/2.57  'sum_class'  [75, 1]      (w:1, o:48, a:1, s:1, b:0), 
% 2.20/2.57  'power_class'  [76, 1]      (w:1, o:51, a:1, s:1, b:0), 
% 2.20/2.57  compose  [78, 2]      (w:1, o:90, a:1, s:1, b:0), 
% 2.20/2.57  'single_valued_class'  [79, 1]      (w:1, o:52, a:1, s:1, b:0), 
% 2.20/2.57  'identity_relation'  [80, 0]      (w:1, o:27, a:1, s:1, b:0), 
% 2.20/2.57  function  [82, 1]      (w:1, o:53, a:1, s:1, b:0), 
% 2.20/2.57  regular  [83, 1]      (w:1, o:37, a:1, s:1, b:0), 
% 2.20/2.57  apply  [84, 2]      (w:1, o:91, a:1, s:1, b:0), 
% 2.20/2.57  choice  [85, 0]      (w:1, o:28, a:1, s:1, b:0), 
% 2.20/2.57  'one_to_one'  [86, 1]      (w:1, o:49, a:1, s:1, b:0), 
% 2.20/2.57  'subset_relation'  [87, 0]      (w:1, o:5, a:1, s:1, b:0), 
% 2.20/2.57  diagonalise  [88, 1]      (w:1, o:54, a:1, s:1, b:0), 
% 2.20/2.57  cantor  [89, 1]      (w:1, o:42, a:1, s:1, b:0), 
% 2.20/2.57  operation  [90, 1]      (w:1, o:50, a:1, s:1, b:0), 
% 2.20/2.57  compatible  [94, 3]      (w:1, o:93, a:1, s:1, b:0), 
% 2.20/2.57  homomorphism  [95, 3]      (w:1, o:96, a:1, s:1, b:0), 
% 2.20/2.57  'not_homomorphism1'  [96, 3]      (w:1, o:97, a:1, s:1, b:0), 
% 2.20/2.57  'not_homomorphism2'  [97, 3]      (w:1, o:98, a:1, s:1, b:0), 
% 2.20/2.57  x  [98, 0]      (w:1, o:29, a:1, s:1, b:0).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  Starting Search:
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  Intermediate Status:
% 2.20/2.57  Generated:    3973
% 2.20/2.57  Kept:         2018
% 2.20/2.57  Inuse:        124
% 2.20/2.57  Deleted:      3
% 2.20/2.57  Deletedinuse: 3
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  Intermediate Status:
% 2.20/2.57  Generated:    9310
% 2.20/2.57  Kept:         4028
% 2.20/2.57  Inuse:        202
% 2.20/2.57  Deleted:      8
% 2.20/2.57  Deletedinuse: 8
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  Intermediate Status:
% 2.20/2.57  Generated:    15234
% 2.20/2.57  Kept:         6327
% 2.20/2.57  Inuse:        286
% 2.20/2.57  Deleted:      11
% 2.20/2.57  Deletedinuse: 11
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  Intermediate Status:
% 2.20/2.57  Generated:    21069
% 2.20/2.57  Kept:         8345
% 2.20/2.57  Inuse:        344
% 2.20/2.57  Deleted:      61
% 2.20/2.57  Deletedinuse: 58
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  Intermediate Status:
% 2.20/2.57  Generated:    28781
% 2.20/2.57  Kept:         10798
% 2.20/2.57  Inuse:        396
% 2.20/2.57  Deleted:      78
% 2.20/2.57  Deletedinuse: 63
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  Intermediate Status:
% 2.20/2.57  Generated:    38202
% 2.20/2.57  Kept:         12809
% 2.20/2.57  Inuse:        445
% 2.20/2.57  Deleted:      80
% 2.20/2.57  Deletedinuse: 64
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  Intermediate Status:
% 2.20/2.57  Generated:    47866
% 2.20/2.57  Kept:         16536
% 2.20/2.57  Inuse:        489
% 2.20/2.57  Deleted:      92
% 2.20/2.57  Deletedinuse: 75
% 2.20/2.57  
% 2.20/2.57  Resimplifying inuse:
% 2.20/2.57  Done
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  Bliksems!, er is een bewijs:
% 2.20/2.57  % SZS status Unsatisfiable
% 2.20/2.57  % SZS output start Refutation
% 2.20/2.57  
% 2.20/2.57  clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 2.20/2.57     )
% 2.20/2.57  .
% 2.20/2.57  clause( 3, [ subclass( X, 'universal_class' ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 103, [ =( X, 'null_class' ), member( 'not_subclass_element'( X, 
% 2.20/2.57    'null_class' ), X ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 122, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 123, [ ~( member( x, 'universal_class' ) ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 124, [ ~( =( singleton( x ), 'null_class' ) ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 140, [ ~( member( x, X ) ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 158, [ =( X, Y ), ~( =( Y, X ) ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 526, [ ~( member( X, Y ) ), ~( =( X, x ) ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 14810, [ ~( member( X, singleton( x ) ) ), ~( member( X, Y ) ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 16535, [ ~( member( X, singleton( x ) ) ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 16536, [ =( singleton( x ), 'null_class' ) ] )
% 2.20/2.57  .
% 2.20/2.57  clause( 16545, [] )
% 2.20/2.57  .
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  % SZS output end Refutation
% 2.20/2.57  found a proof!
% 2.20/2.57  
% 2.20/2.57  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 2.20/2.57  
% 2.20/2.57  initialclauses(
% 2.20/2.57  [ clause( 16547, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 2.20/2.57     ) ] )
% 2.20/2.57  , clause( 16548, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 2.20/2.57    , Y ) ] )
% 2.20/2.57  , clause( 16549, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), 
% 2.20/2.57    subclass( X, Y ) ] )
% 2.20/2.57  , clause( 16550, [ subclass( X, 'universal_class' ) ] )
% 2.20/2.57  , clause( 16551, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.57  , clause( 16552, [ ~( =( X, Y ) ), subclass( Y, X ) ] )
% 2.20/2.57  , clause( 16553, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y )
% 2.20/2.57     ] )
% 2.20/2.57  , clause( 16554, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), 
% 2.20/2.57    =( X, Z ) ] )
% 2.20/2.57  , clause( 16555, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.57    'unordered_pair'( X, Y ) ) ] )
% 2.20/2.57  , clause( 16556, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.57    'unordered_pair'( Y, X ) ) ] )
% 2.20/2.57  , clause( 16557, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16558, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 2.20/2.57  , clause( 16559, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 2.20/2.57    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 2.20/2.57  , clause( 16560, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.57     ) ) ), member( X, Z ) ] )
% 2.20/2.57  , clause( 16561, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.57     ) ) ), member( Y, T ) ] )
% 2.20/2.57  , clause( 16562, [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 
% 2.20/2.57    'ordered_pair'( X, Z ), 'cross_product'( Y, T ) ) ] )
% 2.20/2.57  , clause( 16563, [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 
% 2.20/2.57    'ordered_pair'( first( X ), second( X ) ), X ) ] )
% 2.20/2.57  , clause( 16564, [ subclass( 'element_relation', 'cross_product'( 
% 2.20/2.57    'universal_class', 'universal_class' ) ) ] )
% 2.20/2.57  , clause( 16565, [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' )
% 2.20/2.57     ), member( X, Y ) ] )
% 2.20/2.57  , clause( 16566, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 
% 2.20/2.57    'universal_class', 'universal_class' ) ) ), ~( member( X, Y ) ), member( 
% 2.20/2.57    'ordered_pair'( X, Y ), 'element_relation' ) ] )
% 2.20/2.57  , clause( 16567, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16568, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16569, [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, 
% 2.20/2.57    intersection( Y, Z ) ) ] )
% 2.20/2.57  , clause( 16570, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16571, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.57    complement( Y ) ), member( X, Y ) ] )
% 2.20/2.57  , clause( 16572, [ =( complement( intersection( complement( X ), complement( 
% 2.20/2.57    Y ) ) ), union( X, Y ) ) ] )
% 2.20/2.57  , clause( 16573, [ =( intersection( complement( intersection( X, Y ) ), 
% 2.20/2.57    complement( intersection( complement( X ), complement( Y ) ) ) ), 
% 2.20/2.57    'symmetric_difference'( X, Y ) ) ] )
% 2.20/2.57  , clause( 16574, [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( 
% 2.20/2.57    X, Y, Z ) ) ] )
% 2.20/2.57  , clause( 16575, [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( 
% 2.20/2.57    Z, X, Y ) ) ] )
% 2.20/2.57  , clause( 16576, [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 
% 2.20/2.57    'null_class' ) ), ~( member( Y, 'domain_of'( X ) ) ) ] )
% 2.20/2.57  , clause( 16577, [ ~( member( X, 'universal_class' ) ), =( restrict( Y, 
% 2.20/2.57    singleton( X ), 'universal_class' ), 'null_class' ), member( X, 
% 2.20/2.57    'domain_of'( Y ) ) ] )
% 2.20/2.57  , clause( 16578, [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 2.20/2.57    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 2.20/2.57  , clause( 16579, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 2.20/2.57    rotate( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T )
% 2.20/2.57     ] )
% 2.20/2.57  , clause( 16580, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 2.20/2.57    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 
% 2.20/2.57    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 2.20/2.57    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X )
% 2.20/2.57    , Y ), rotate( T ) ) ] )
% 2.20/2.57  , clause( 16581, [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 2.20/2.57    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 2.20/2.57  , clause( 16582, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 2.20/2.57    flip( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16583, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 2.20/2.57    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 
% 2.20/2.57    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 2.20/2.57    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X )
% 2.20/2.57    , Z ), flip( T ) ) ] )
% 2.20/2.57  , clause( 16584, [ =( 'domain_of'( flip( 'cross_product'( X, 
% 2.20/2.57    'universal_class' ) ) ), inverse( X ) ) ] )
% 2.20/2.57  , clause( 16585, [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ] )
% 2.20/2.57  , clause( 16586, [ =( first( 'not_subclass_element'( restrict( X, Y, 
% 2.20/2.57    singleton( Z ) ), 'null_class' ) ), domain( X, Y, Z ) ) ] )
% 2.20/2.57  , clause( 16587, [ =( second( 'not_subclass_element'( restrict( X, 
% 2.20/2.57    singleton( Y ), Z ), 'null_class' ) ), range( X, Y, Z ) ) ] )
% 2.20/2.57  , clause( 16588, [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), 
% 2.20/2.57    image( X, Y ) ) ] )
% 2.20/2.57  , clause( 16589, [ =( union( X, singleton( X ) ), successor( X ) ) ] )
% 2.20/2.57  , clause( 16590, [ subclass( 'successor_relation', 'cross_product'( 
% 2.20/2.57    'universal_class', 'universal_class' ) ) ] )
% 2.20/2.57  , clause( 16591, [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation'
% 2.20/2.57     ) ), =( successor( X ), Y ) ] )
% 2.20/2.57  , clause( 16592, [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( 
% 2.20/2.57    X, Y ), 'cross_product'( 'universal_class', 'universal_class' ) ) ), 
% 2.20/2.57    member( 'ordered_pair'( X, Y ), 'successor_relation' ) ] )
% 2.20/2.57  , clause( 16593, [ ~( inductive( X ) ), member( 'null_class', X ) ] )
% 2.20/2.57  , clause( 16594, [ ~( inductive( X ) ), subclass( image( 
% 2.20/2.57    'successor_relation', X ), X ) ] )
% 2.20/2.57  , clause( 16595, [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 2.20/2.57    'successor_relation', X ), X ) ), inductive( X ) ] )
% 2.20/2.57  , clause( 16596, [ inductive( omega ) ] )
% 2.20/2.57  , clause( 16597, [ ~( inductive( X ) ), subclass( omega, X ) ] )
% 2.20/2.57  , clause( 16598, [ member( omega, 'universal_class' ) ] )
% 2.20/2.57  , clause( 16599, [ =( 'domain_of'( restrict( 'element_relation', 
% 2.20/2.57    'universal_class', X ) ), 'sum_class'( X ) ) ] )
% 2.20/2.57  , clause( 16600, [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( 
% 2.20/2.57    X ), 'universal_class' ) ] )
% 2.20/2.57  , clause( 16601, [ =( complement( image( 'element_relation', complement( X
% 2.20/2.57     ) ) ), 'power_class'( X ) ) ] )
% 2.20/2.57  , clause( 16602, [ ~( member( X, 'universal_class' ) ), member( 
% 2.20/2.57    'power_class'( X ), 'universal_class' ) ] )
% 2.20/2.57  , clause( 16603, [ subclass( compose( X, Y ), 'cross_product'( 
% 2.20/2.57    'universal_class', 'universal_class' ) ) ] )
% 2.20/2.57  , clause( 16604, [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), 
% 2.20/2.57    member( Y, image( Z, image( T, singleton( X ) ) ) ) ] )
% 2.20/2.57  , clause( 16605, [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) )
% 2.20/2.57    , ~( member( 'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 2.20/2.57    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 2.20/2.57     ) ] )
% 2.20/2.57  , clause( 16606, [ ~( 'single_valued_class'( X ) ), subclass( compose( X, 
% 2.20/2.57    inverse( X ) ), 'identity_relation' ) ] )
% 2.20/2.57  , clause( 16607, [ ~( subclass( compose( X, inverse( X ) ), 
% 2.20/2.57    'identity_relation' ) ), 'single_valued_class'( X ) ] )
% 2.20/2.57  , clause( 16608, [ ~( function( X ) ), subclass( X, 'cross_product'( 
% 2.20/2.57    'universal_class', 'universal_class' ) ) ] )
% 2.20/2.57  , clause( 16609, [ ~( function( X ) ), subclass( compose( X, inverse( X ) )
% 2.20/2.57    , 'identity_relation' ) ] )
% 2.20/2.57  , clause( 16610, [ ~( subclass( X, 'cross_product'( 'universal_class', 
% 2.20/2.57    'universal_class' ) ) ), ~( subclass( compose( X, inverse( X ) ), 
% 2.20/2.57    'identity_relation' ) ), function( X ) ] )
% 2.20/2.57  , clause( 16611, [ ~( function( X ) ), ~( member( Y, 'universal_class' ) )
% 2.20/2.57    , member( image( X, Y ), 'universal_class' ) ] )
% 2.20/2.57  , clause( 16612, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 2.20/2.57  , clause( 16613, [ =( X, 'null_class' ), =( intersection( X, regular( X ) )
% 2.20/2.57    , 'null_class' ) ] )
% 2.20/2.57  , clause( 16614, [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, 
% 2.20/2.57    Y ) ) ] )
% 2.20/2.57  , clause( 16615, [ function( choice ) ] )
% 2.20/2.57  , clause( 16616, [ ~( member( X, 'universal_class' ) ), =( X, 'null_class'
% 2.20/2.57     ), member( apply( choice, X ), X ) ] )
% 2.20/2.57  , clause( 16617, [ ~( 'one_to_one'( X ) ), function( X ) ] )
% 2.20/2.57  , clause( 16618, [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ] )
% 2.20/2.57  , clause( 16619, [ ~( function( inverse( X ) ) ), ~( function( X ) ), 
% 2.20/2.57    'one_to_one'( X ) ] )
% 2.20/2.57  , clause( 16620, [ =( intersection( 'cross_product'( 'universal_class', 
% 2.20/2.57    'universal_class' ), intersection( 'cross_product'( 'universal_class', 
% 2.20/2.57    'universal_class' ), complement( compose( complement( 'element_relation'
% 2.20/2.57     ), inverse( 'element_relation' ) ) ) ) ), 'subset_relation' ) ] )
% 2.20/2.57  , clause( 16621, [ =( intersection( inverse( 'subset_relation' ), 
% 2.20/2.57    'subset_relation' ), 'identity_relation' ) ] )
% 2.20/2.57  , clause( 16622, [ =( complement( 'domain_of'( intersection( X, 
% 2.20/2.57    'identity_relation' ) ) ), diagonalise( X ) ) ] )
% 2.20/2.57  , clause( 16623, [ =( intersection( 'domain_of'( X ), diagonalise( compose( 
% 2.20/2.57    inverse( 'element_relation' ), X ) ) ), cantor( X ) ) ] )
% 2.20/2.57  , clause( 16624, [ ~( operation( X ) ), function( X ) ] )
% 2.20/2.57  , clause( 16625, [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 
% 2.20/2.57    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 2.20/2.57     ] )
% 2.20/2.57  , clause( 16626, [ ~( operation( X ) ), subclass( 'range_of'( X ), 
% 2.20/2.57    'domain_of'( 'domain_of'( X ) ) ) ] )
% 2.20/2.57  , clause( 16627, [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 
% 2.20/2.57    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 2.20/2.57     ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), 
% 2.20/2.57    operation( X ) ] )
% 2.20/2.57  , clause( 16628, [ ~( compatible( X, Y, Z ) ), function( X ) ] )
% 2.20/2.57  , clause( 16629, [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( 
% 2.20/2.57    Y ) ), 'domain_of'( X ) ) ] )
% 2.20/2.57  , clause( 16630, [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 
% 2.20/2.57    'domain_of'( 'domain_of'( Z ) ) ) ] )
% 2.20/2.57  , clause( 16631, [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y )
% 2.20/2.57     ), 'domain_of'( X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 
% 2.20/2.57    'domain_of'( Z ) ) ) ), compatible( X, Y, Z ) ] )
% 2.20/2.57  , clause( 16632, [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ] )
% 2.20/2.57  , clause( 16633, [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ] )
% 2.20/2.57  , clause( 16634, [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ] )
% 2.20/2.57  , clause( 16635, [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( 
% 2.20/2.57    T, U ), 'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T )
% 2.20/2.57    , apply( X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16636, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 2.20/2.57    Z, X, Y ) ), member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 2.20/2.57    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 2.20/2.57    , Y ) ] )
% 2.20/2.57  , clause( 16637, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 2.20/2.57    Z, X, Y ) ), ~( =( apply( Y, 'ordered_pair'( apply( Z, 
% 2.20/2.57    'not_homomorphism1'( Z, X, Y ) ), apply( Z, 'not_homomorphism2'( Z, X, Y
% 2.20/2.57     ) ) ) ), apply( Z, apply( X, 'ordered_pair'( 'not_homomorphism1'( Z, X, 
% 2.20/2.57    Y ), 'not_homomorphism2'( Z, X, Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16638, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.57     ) ) ), member( X, 'unordered_pair'( X, Y ) ) ] )
% 2.20/2.57  , clause( 16639, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.57     ) ) ), member( Y, 'unordered_pair'( X, Y ) ) ] )
% 2.20/2.57  , clause( 16640, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.57     ) ) ), member( X, 'universal_class' ) ] )
% 2.20/2.57  , clause( 16641, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.57     ) ) ), member( Y, 'universal_class' ) ] )
% 2.20/2.57  , clause( 16642, [ subclass( X, X ) ] )
% 2.20/2.57  , clause( 16643, [ ~( subclass( X, Y ) ), ~( subclass( Y, Z ) ), subclass( 
% 2.20/2.57    X, Z ) ] )
% 2.20/2.57  , clause( 16644, [ =( X, Y ), member( 'not_subclass_element'( X, Y ), X ), 
% 2.20/2.57    member( 'not_subclass_element'( Y, X ), Y ) ] )
% 2.20/2.57  , clause( 16645, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( X, 
% 2.20/2.57    Y ), member( 'not_subclass_element'( Y, X ), Y ) ] )
% 2.20/2.57  , clause( 16646, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( Y, 
% 2.20/2.57    X ), member( 'not_subclass_element'( Y, X ), Y ) ] )
% 2.20/2.57  , clause( 16647, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), ~( 
% 2.20/2.57    member( 'not_subclass_element'( Y, X ), X ) ), =( X, Y ) ] )
% 2.20/2.57  , clause( 16648, [ ~( member( X, intersection( complement( Y ), Y ) ) ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16649, [ ~( member( X, 'null_class' ) ) ] )
% 2.20/2.57  , clause( 16650, [ subclass( 'null_class', X ) ] )
% 2.20/2.57  , clause( 16651, [ ~( subclass( X, 'null_class' ) ), =( X, 'null_class' ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16652, [ =( X, 'null_class' ), member( 'not_subclass_element'( X
% 2.20/2.57    , 'null_class' ), X ) ] )
% 2.20/2.57  , clause( 16653, [ member( 'null_class', 'universal_class' ) ] )
% 2.20/2.57  , clause( 16654, [ =( 'unordered_pair'( X, Y ), 'unordered_pair'( Y, X ) )
% 2.20/2.57     ] )
% 2.20/2.57  , clause( 16655, [ subclass( singleton( X ), 'unordered_pair'( X, Y ) ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16656, [ subclass( singleton( X ), 'unordered_pair'( Y, X ) ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16657, [ member( X, 'universal_class' ), =( 'unordered_pair'( Y, 
% 2.20/2.57    X ), singleton( Y ) ) ] )
% 2.20/2.57  , clause( 16658, [ member( X, 'universal_class' ), =( 'unordered_pair'( X, 
% 2.20/2.57    Y ), singleton( Y ) ) ] )
% 2.20/2.57  , clause( 16659, [ =( 'unordered_pair'( X, Y ), 'null_class' ), member( X, 
% 2.20/2.57    'universal_class' ), member( Y, 'universal_class' ) ] )
% 2.20/2.57  , clause( 16660, [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( X, Z )
% 2.20/2.57     ) ), ~( member( 'ordered_pair'( Y, Z ), 'cross_product'( 
% 2.20/2.57    'universal_class', 'universal_class' ) ) ), =( Y, Z ) ] )
% 2.20/2.57  , clause( 16661, [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( Z, Y )
% 2.20/2.57     ) ), ~( member( 'ordered_pair'( X, Z ), 'cross_product'( 
% 2.20/2.57    'universal_class', 'universal_class' ) ) ), =( X, Z ) ] )
% 2.20/2.57  , clause( 16662, [ ~( member( X, 'universal_class' ) ), ~( =( 
% 2.20/2.57    'unordered_pair'( X, Y ), 'null_class' ) ) ] )
% 2.20/2.57  , clause( 16663, [ ~( member( X, 'universal_class' ) ), ~( =( 
% 2.20/2.57    'unordered_pair'( Y, X ), 'null_class' ) ) ] )
% 2.20/2.57  , clause( 16664, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.57     ) ) ), ~( =( 'unordered_pair'( X, Y ), 'null_class' ) ) ] )
% 2.20/2.57  , clause( 16665, [ ~( member( X, Y ) ), ~( member( Z, Y ) ), subclass( 
% 2.20/2.57    'unordered_pair'( X, Z ), Y ) ] )
% 2.20/2.57  , clause( 16666, [ member( singleton( X ), 'universal_class' ) ] )
% 2.20/2.57  , clause( 16667, [ member( singleton( X ), 'unordered_pair'( Y, singleton( 
% 2.20/2.57    X ) ) ) ] )
% 2.20/2.57  , clause( 16668, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.57    singleton( X ) ) ] )
% 2.20/2.57  , clause( 16669, [ ~( member( X, 'universal_class' ) ), ~( =( singleton( X
% 2.20/2.57     ), 'null_class' ) ) ] )
% 2.20/2.57  , clause( 16670, [ member( 'null_class', singleton( 'null_class' ) ) ] )
% 2.20/2.57  , clause( 16671, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 2.20/2.57  , clause( 16672, [ ~( member( x, 'universal_class' ) ) ] )
% 2.20/2.57  , clause( 16673, [ ~( =( singleton( x ), 'null_class' ) ) ] )
% 2.20/2.57  ] ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  subsumption(
% 2.20/2.57  clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 2.20/2.57     )
% 2.20/2.57  , clause( 16547, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 2.20/2.57     ) ] )
% 2.20/2.57  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 2.20/2.57    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  subsumption(
% 2.20/2.57  clause( 3, [ subclass( X, 'universal_class' ) ] )
% 2.20/2.57  , clause( 16550, [ subclass( X, 'universal_class' ) ] )
% 2.20/2.57  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  subsumption(
% 2.20/2.57  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.57  , clause( 16551, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.57  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 2.20/2.57     ), ==>( 1, 1 )] ) ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  subsumption(
% 2.20/2.57  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 2.20/2.57  , clause( 16553, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y )
% 2.20/2.57     ] )
% 2.20/2.57  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 2.20/2.57     ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  subsumption(
% 2.20/2.57  clause( 103, [ =( X, 'null_class' ), member( 'not_subclass_element'( X, 
% 2.20/2.57    'null_class' ), X ) ] )
% 2.20/2.57  , clause( 16652, [ =( X, 'null_class' ), member( 'not_subclass_element'( X
% 2.20/2.57    , 'null_class' ), X ) ] )
% 2.20/2.57  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 
% 2.20/2.57    1 )] ) ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  subsumption(
% 2.20/2.57  clause( 122, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 2.20/2.57  , clause( 16671, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 2.20/2.57  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 2.20/2.57     ), ==>( 1, 1 )] ) ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  subsumption(
% 2.20/2.57  clause( 123, [ ~( member( x, 'universal_class' ) ) ] )
% 2.20/2.57  , clause( 16672, [ ~( member( x, 'universal_class' ) ) ] )
% 2.20/2.57  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  subsumption(
% 2.20/2.57  clause( 124, [ ~( =( singleton( x ), 'null_class' ) ) ] )
% 2.20/2.57  , clause( 16673, [ ~( =( singleton( x ), 'null_class' ) ) ] )
% 2.20/2.57  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  resolution(
% 2.20/2.57  clause( 16958, [ ~( subclass( X, 'universal_class' ) ), ~( member( x, X ) )
% 2.20/2.57     ] )
% 2.20/2.57  , clause( 123, [ ~( member( x, 'universal_class' ) ) ] )
% 2.20/2.57  , 0, clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 2.20/2.57     ) ] )
% 2.20/2.57  , 2, substitution( 0, [] ), substitution( 1, [ :=( X, X ), :=( Y, 
% 2.20/2.57    'universal_class' ), :=( Z, x )] )).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  resolution(
% 2.20/2.57  clause( 16959, [ ~( member( x, X ) ) ] )
% 2.20/2.57  , clause( 16958, [ ~( subclass( X, 'universal_class' ) ), ~( member( x, X )
% 2.20/2.57     ) ] )
% 2.20/2.57  , 0, clause( 3, [ subclass( X, 'universal_class' ) ] )
% 2.20/2.57  , 0, substitution( 0, [ :=( X, X )] ), substitution( 1, [ :=( X, X )] )
% 2.20/2.57    ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  subsumption(
% 2.20/2.57  clause( 140, [ ~( member( x, X ) ) ] )
% 2.20/2.57  , clause( 16959, [ ~( member( x, X ) ) ] )
% 2.20/2.57  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  eqswap(
% 2.20/2.57  clause( 16960, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 2.20/2.57  , clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.57  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y )] )).
% 2.20/2.57  
% 2.20/2.57  
% 2.20/2.57  eqswap(
% 2.20/2.57  clause( 16961, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 2.20/2.57  , clause( 4, [ ~( =( X, Y ) ), subclass( X,Cputime limit exceeded (core dumped)
%------------------------------------------------------------------------------