TSTP Solution File: SET103-6 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : SET103-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n028.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 22:47:08 EDT 2022

% Result   : Unsatisfiable 1.25s 1.66s
% Output   : Refutation 1.25s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.10  % Problem  : SET103-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.10/0.10  % Command  : bliksem %s
% 0.10/0.29  % Computer : n028.cluster.edu
% 0.10/0.29  % Model    : x86_64 x86_64
% 0.10/0.29  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.29  % Memory   : 8042.1875MB
% 0.10/0.29  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.10/0.29  % CPULimit : 300
% 0.10/0.29  % DateTime : Sun Jul 10 04:46:12 EDT 2022
% 0.10/0.29  % CPUTime  : 
% 0.67/1.02  *** allocated 10000 integers for termspace/termends
% 0.67/1.02  *** allocated 10000 integers for clauses
% 0.67/1.02  *** allocated 10000 integers for justifications
% 0.67/1.02  Bliksem 1.12
% 0.67/1.02  
% 0.67/1.02  
% 0.67/1.02  Automatic Strategy Selection
% 0.67/1.02  
% 0.67/1.02  Clauses:
% 0.67/1.02  [
% 0.67/1.02     [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ],
% 0.67/1.02     [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y ) ],
% 0.67/1.02     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), subclass( X, Y ) ]
% 0.67/1.02    ,
% 0.67/1.02     [ subclass( X, 'universal_class' ) ],
% 0.67/1.02     [ ~( =( X, Y ) ), subclass( X, Y ) ],
% 0.67/1.02     [ ~( =( X, Y ) ), subclass( Y, X ) ],
% 0.67/1.02     [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ],
% 0.67/1.02     [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z ) ]
% 0.67/1.02    ,
% 0.67/1.02     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( X, Y
% 0.67/1.02     ) ) ],
% 0.67/1.02     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( Y, X
% 0.67/1.02     ) ) ],
% 0.67/1.02     [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ],
% 0.67/1.02     [ =( 'unordered_pair'( X, X ), singleton( X ) ) ],
% 0.67/1.02     [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, singleton( Y
% 0.67/1.02     ) ) ), 'ordered_pair'( X, Y ) ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.67/1.02    X, Z ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.67/1.02    Y, T ) ],
% 0.67/1.02     [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 'ordered_pair'( X, Z
% 0.67/1.02     ), 'cross_product'( Y, T ) ) ],
% 0.67/1.02     [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 'ordered_pair'( first( X
% 0.67/1.02     ), second( X ) ), X ) ],
% 0.67/1.02     [ subclass( 'element_relation', 'cross_product'( 'universal_class', 
% 0.67/1.02    'universal_class' ) ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) ), member( X, 
% 0.67/1.02    Y ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 'universal_class'
% 0.67/1.02    , 'universal_class' ) ) ), ~( member( X, Y ) ), member( 'ordered_pair'( X
% 0.67/1.02    , Y ), 'element_relation' ) ],
% 0.67/1.02     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ],
% 0.67/1.02     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ],
% 0.67/1.02     [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, intersection( Y, 
% 0.67/1.02    Z ) ) ],
% 0.67/1.02     [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ],
% 0.67/1.02     [ ~( member( X, 'universal_class' ) ), member( X, complement( Y ) ), 
% 0.67/1.02    member( X, Y ) ],
% 0.67/1.02     [ =( complement( intersection( complement( X ), complement( Y ) ) ), 
% 0.67/1.02    union( X, Y ) ) ],
% 0.67/1.02     [ =( intersection( complement( intersection( X, Y ) ), complement( 
% 0.67/1.02    intersection( complement( X ), complement( Y ) ) ) ), 
% 0.67/1.02    'symmetric_difference'( X, Y ) ) ],
% 0.67/1.02     [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( X, Y, Z ) ) ]
% 0.67/1.02    ,
% 0.67/1.02     [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( Z, X, Y ) ) ]
% 0.67/1.02    ,
% 0.67/1.02     [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 'null_class' )
% 0.67/1.02     ), ~( member( Y, 'domain_of'( X ) ) ) ],
% 0.67/1.02     [ ~( member( X, 'universal_class' ) ), =( restrict( Y, singleton( X ), 
% 0.67/1.02    'universal_class' ), 'null_class' ), member( X, 'domain_of'( Y ) ) ],
% 0.67/1.02     [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.67/1.02    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), rotate( T ) )
% 0.67/1.02     ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.67/1.02    member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 'cross_product'( 
% 0.67/1.02    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.67/1.02    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X ), 
% 0.67/1.02    Y ), rotate( T ) ) ],
% 0.67/1.02     [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.67/1.02    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), flip( T ) ) )
% 0.67/1.02    , member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.67/1.02    member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 'cross_product'( 
% 0.67/1.02    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.67/1.02    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), 
% 0.67/1.02    Z ), flip( T ) ) ],
% 0.67/1.02     [ =( 'domain_of'( flip( 'cross_product'( X, 'universal_class' ) ) ), 
% 0.67/1.02    inverse( X ) ) ],
% 0.67/1.02     [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ],
% 0.67/1.02     [ =( first( 'not_subclass_element'( restrict( X, Y, singleton( Z ) ), 
% 0.67/1.02    'null_class' ) ), domain( X, Y, Z ) ) ],
% 0.67/1.02     [ =( second( 'not_subclass_element'( restrict( X, singleton( Y ), Z ), 
% 0.67/1.02    'null_class' ) ), range( X, Y, Z ) ) ],
% 0.67/1.02     [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), image( X, Y ) )
% 0.67/1.02     ],
% 0.67/1.02     [ =( union( X, singleton( X ) ), successor( X ) ) ],
% 0.67/1.02     [ subclass( 'successor_relation', 'cross_product'( 'universal_class', 
% 0.67/1.02    'universal_class' ) ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' ) ), =( 
% 0.67/1.02    successor( X ), Y ) ],
% 0.67/1.02     [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X, Y ), 
% 0.67/1.02    'cross_product'( 'universal_class', 'universal_class' ) ) ), member( 
% 0.67/1.02    'ordered_pair'( X, Y ), 'successor_relation' ) ],
% 0.67/1.02     [ ~( inductive( X ) ), member( 'null_class', X ) ],
% 0.67/1.02     [ ~( inductive( X ) ), subclass( image( 'successor_relation', X ), X ) ]
% 0.67/1.02    ,
% 0.67/1.02     [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.67/1.02    'successor_relation', X ), X ) ), inductive( X ) ],
% 0.67/1.02     [ inductive( omega ) ],
% 0.67/1.02     [ ~( inductive( X ) ), subclass( omega, X ) ],
% 0.67/1.02     [ member( omega, 'universal_class' ) ],
% 0.67/1.02     [ =( 'domain_of'( restrict( 'element_relation', 'universal_class', X ) )
% 0.67/1.02    , 'sum_class'( X ) ) ],
% 0.67/1.02     [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( X ), 
% 0.67/1.02    'universal_class' ) ],
% 0.67/1.02     [ =( complement( image( 'element_relation', complement( X ) ) ), 
% 0.67/1.02    'power_class'( X ) ) ],
% 0.67/1.02     [ ~( member( X, 'universal_class' ) ), member( 'power_class'( X ), 
% 0.67/1.02    'universal_class' ) ],
% 0.67/1.02     [ subclass( compose( X, Y ), 'cross_product'( 'universal_class', 
% 0.67/1.02    'universal_class' ) ) ],
% 0.67/1.02     [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), member( Y, 
% 0.67/1.02    image( Z, image( T, singleton( X ) ) ) ) ],
% 0.67/1.02     [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) ), ~( member( 
% 0.67/1.02    'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.67/1.02    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.67/1.02     ) ],
% 0.67/1.02     [ ~( 'single_valued_class'( X ) ), subclass( compose( X, inverse( X ) )
% 0.67/1.02    , 'identity_relation' ) ],
% 0.67/1.02     [ ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) ), 
% 0.67/1.02    'single_valued_class'( X ) ],
% 0.67/1.02     [ ~( function( X ) ), subclass( X, 'cross_product'( 'universal_class', 
% 0.67/1.02    'universal_class' ) ) ],
% 0.67/1.02     [ ~( function( X ) ), subclass( compose( X, inverse( X ) ), 
% 0.67/1.02    'identity_relation' ) ],
% 0.67/1.02     [ ~( subclass( X, 'cross_product'( 'universal_class', 'universal_class'
% 0.67/1.02     ) ) ), ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) )
% 0.67/1.02    , function( X ) ],
% 0.67/1.02     [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), member( image( 
% 0.67/1.02    X, Y ), 'universal_class' ) ],
% 0.67/1.02     [ =( X, 'null_class' ), member( regular( X ), X ) ],
% 0.67/1.02     [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 'null_class'
% 0.67/1.02     ) ],
% 0.67/1.02     [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y ) ) ],
% 0.67/1.02     [ function( choice ) ],
% 0.67/1.02     [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' ), member( 
% 0.67/1.02    apply( choice, X ), X ) ],
% 0.67/1.02     [ ~( 'one_to_one'( X ) ), function( X ) ],
% 0.67/1.02     [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ],
% 0.67/1.02     [ ~( function( inverse( X ) ) ), ~( function( X ) ), 'one_to_one'( X ) ]
% 0.67/1.02    ,
% 0.67/1.02     [ =( intersection( 'cross_product'( 'universal_class', 'universal_class'
% 0.67/1.02     ), intersection( 'cross_product'( 'universal_class', 'universal_class' )
% 0.67/1.02    , complement( compose( complement( 'element_relation' ), inverse( 
% 0.67/1.02    'element_relation' ) ) ) ) ), 'subset_relation' ) ],
% 0.67/1.02     [ =( intersection( inverse( 'subset_relation' ), 'subset_relation' ), 
% 0.67/1.02    'identity_relation' ) ],
% 0.67/1.02     [ =( complement( 'domain_of'( intersection( X, 'identity_relation' ) ) )
% 0.67/1.02    , diagonalise( X ) ) ],
% 0.67/1.02     [ =( intersection( 'domain_of'( X ), diagonalise( compose( inverse( 
% 0.67/1.02    'element_relation' ), X ) ) ), cantor( X ) ) ],
% 0.67/1.02     [ ~( operation( X ) ), function( X ) ],
% 0.67/1.02     [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 'domain_of'( X )
% 0.67/1.02     ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ],
% 0.67/1.02     [ ~( operation( X ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 1.25/1.66    'domain_of'( X ) ) ) ],
% 1.25/1.66     [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 'domain_of'( X
% 1.25/1.66     ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ), ~( 
% 1.25/1.66    subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), operation( 
% 1.25/1.66    X ) ],
% 1.25/1.66     [ ~( compatible( X, Y, Z ) ), function( X ) ],
% 1.25/1.66     [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( Y ) ), 
% 1.25/1.66    'domain_of'( X ) ) ],
% 1.25/1.66     [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 1.25/1.66    'domain_of'( Z ) ) ) ],
% 1.25/1.66     [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) ), 'domain_of'( 
% 1.25/1.66    X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( Z ) ) )
% 1.25/1.66     ), compatible( X, Y, Z ) ],
% 1.25/1.66     [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ],
% 1.25/1.66     [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ],
% 1.25/1.66     [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ],
% 1.25/1.66     [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( T, U ), 
% 1.25/1.66    'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T ), apply( 
% 1.25/1.66    X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ],
% 1.25/1.66     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 1.25/1.66    member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 1.25/1.66    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 1.25/1.66    , Y ) ],
% 1.25/1.66     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 1.25/1.66    ~( =( apply( Y, 'ordered_pair'( apply( Z, 'not_homomorphism1'( Z, X, Y )
% 1.25/1.66     ), apply( Z, 'not_homomorphism2'( Z, X, Y ) ) ) ), apply( Z, apply( X, 
% 1.25/1.66    'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 'not_homomorphism2'( Z, X
% 1.25/1.66    , Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ],
% 1.25/1.66     [ ~( =( 'unordered_pair'( singleton( x ), 'unordered_pair'( x, 
% 1.25/1.66    'null_class' ) ), 'ordered_pair'( x, y ) ) ) ],
% 1.25/1.66     [ ~( member( y, 'universal_class' ) ) ]
% 1.25/1.66  ] .
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  percentage equality = 0.218579, percentage horn = 0.913978
% 1.25/1.66  This is a problem with some equality
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  Options Used:
% 1.25/1.66  
% 1.25/1.66  useres =            1
% 1.25/1.66  useparamod =        1
% 1.25/1.66  useeqrefl =         1
% 1.25/1.66  useeqfact =         1
% 1.25/1.66  usefactor =         1
% 1.25/1.66  usesimpsplitting =  0
% 1.25/1.66  usesimpdemod =      5
% 1.25/1.66  usesimpres =        3
% 1.25/1.66  
% 1.25/1.66  resimpinuse      =  1000
% 1.25/1.66  resimpclauses =     20000
% 1.25/1.66  substype =          eqrewr
% 1.25/1.66  backwardsubs =      1
% 1.25/1.66  selectoldest =      5
% 1.25/1.66  
% 1.25/1.66  litorderings [0] =  split
% 1.25/1.66  litorderings [1] =  extend the termordering, first sorting on arguments
% 1.25/1.66  
% 1.25/1.66  termordering =      kbo
% 1.25/1.66  
% 1.25/1.66  litapriori =        0
% 1.25/1.66  termapriori =       1
% 1.25/1.66  litaposteriori =    0
% 1.25/1.66  termaposteriori =   0
% 1.25/1.66  demodaposteriori =  0
% 1.25/1.66  ordereqreflfact =   0
% 1.25/1.66  
% 1.25/1.66  litselect =         negord
% 1.25/1.66  
% 1.25/1.66  maxweight =         15
% 1.25/1.66  maxdepth =          30000
% 1.25/1.66  maxlength =         115
% 1.25/1.66  maxnrvars =         195
% 1.25/1.66  excuselevel =       1
% 1.25/1.66  increasemaxweight = 1
% 1.25/1.66  
% 1.25/1.66  maxselected =       10000000
% 1.25/1.66  maxnrclauses =      10000000
% 1.25/1.66  
% 1.25/1.66  showgenerated =    0
% 1.25/1.66  showkept =         0
% 1.25/1.66  showselected =     0
% 1.25/1.66  showdeleted =      0
% 1.25/1.66  showresimp =       1
% 1.25/1.66  showstatus =       2000
% 1.25/1.66  
% 1.25/1.66  prologoutput =     1
% 1.25/1.66  nrgoals =          5000000
% 1.25/1.66  totalproof =       1
% 1.25/1.66  
% 1.25/1.66  Symbols occurring in the translation:
% 1.25/1.66  
% 1.25/1.66  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 1.25/1.66  .  [1, 2]      (w:1, o:56, a:1, s:1, b:0), 
% 1.25/1.66  !  [4, 1]      (w:0, o:31, a:1, s:1, b:0), 
% 1.25/1.66  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 1.25/1.66  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 1.25/1.66  subclass  [41, 2]      (w:1, o:81, a:1, s:1, b:0), 
% 1.25/1.66  member  [43, 2]      (w:1, o:82, a:1, s:1, b:0), 
% 1.25/1.66  'not_subclass_element'  [44, 2]      (w:1, o:83, a:1, s:1, b:0), 
% 1.25/1.66  'universal_class'  [45, 0]      (w:1, o:21, a:1, s:1, b:0), 
% 1.25/1.66  'unordered_pair'  [46, 2]      (w:1, o:84, a:1, s:1, b:0), 
% 1.25/1.66  singleton  [47, 1]      (w:1, o:39, a:1, s:1, b:0), 
% 1.25/1.66  'ordered_pair'  [48, 2]      (w:1, o:85, a:1, s:1, b:0), 
% 1.25/1.66  'cross_product'  [50, 2]      (w:1, o:86, a:1, s:1, b:0), 
% 1.25/1.66  first  [52, 1]      (w:1, o:40, a:1, s:1, b:0), 
% 1.25/1.66  second  [53, 1]      (w:1, o:41, a:1, s:1, b:0), 
% 1.25/1.66  'element_relation'  [54, 0]      (w:1, o:25, a:1, s:1, b:0), 
% 1.25/1.66  intersection  [55, 2]      (w:1, o:88, a:1, s:1, b:0), 
% 1.25/1.66  complement  [56, 1]      (w:1, o:42, a:1, s:1, b:0), 
% 1.25/1.66  union  [57, 2]      (w:1, o:89, a:1, s:1, b:0), 
% 1.25/1.66  'symmetric_difference'  [58, 2]      (w:1, o:90, a:1, s:1, b:0), 
% 1.25/1.66  restrict  [60, 3]      (w:1, o:93, a:1, s:1, b:0), 
% 1.25/1.66  'null_class'  [61, 0]      (w:1, o:26, a:1, s:1, b:0), 
% 1.25/1.66  'domain_of'  [62, 1]      (w:1, o:44, a:1, s:1, b:0), 
% 1.25/1.66  rotate  [63, 1]      (w:1, o:36, a:1, s:1, b:0), 
% 1.25/1.66  flip  [65, 1]      (w:1, o:45, a:1, s:1, b:0), 
% 1.25/1.66  inverse  [66, 1]      (w:1, o:46, a:1, s:1, b:0), 
% 1.25/1.66  'range_of'  [67, 1]      (w:1, o:37, a:1, s:1, b:0), 
% 1.25/1.66  domain  [68, 3]      (w:1, o:95, a:1, s:1, b:0), 
% 1.25/1.66  range  [69, 3]      (w:1, o:96, a:1, s:1, b:0), 
% 1.25/1.66  image  [70, 2]      (w:1, o:87, a:1, s:1, b:0), 
% 1.25/1.66  successor  [71, 1]      (w:1, o:47, a:1, s:1, b:0), 
% 1.25/1.66  'successor_relation'  [72, 0]      (w:1, o:6, a:1, s:1, b:0), 
% 1.25/1.66  inductive  [73, 1]      (w:1, o:48, a:1, s:1, b:0), 
% 1.25/1.66  omega  [74, 0]      (w:1, o:9, a:1, s:1, b:0), 
% 1.25/1.66  'sum_class'  [75, 1]      (w:1, o:49, a:1, s:1, b:0), 
% 1.25/1.66  'power_class'  [76, 1]      (w:1, o:52, a:1, s:1, b:0), 
% 1.25/1.66  compose  [78, 2]      (w:1, o:91, a:1, s:1, b:0), 
% 1.25/1.66  'single_valued_class'  [79, 1]      (w:1, o:53, a:1, s:1, b:0), 
% 1.25/1.66  'identity_relation'  [80, 0]      (w:1, o:27, a:1, s:1, b:0), 
% 1.25/1.66  function  [82, 1]      (w:1, o:54, a:1, s:1, b:0), 
% 1.25/1.66  regular  [83, 1]      (w:1, o:38, a:1, s:1, b:0), 
% 1.25/1.66  apply  [84, 2]      (w:1, o:92, a:1, s:1, b:0), 
% 1.25/1.66  choice  [85, 0]      (w:1, o:28, a:1, s:1, b:0), 
% 1.25/1.66  'one_to_one'  [86, 1]      (w:1, o:50, a:1, s:1, b:0), 
% 1.25/1.66  'subset_relation'  [87, 0]      (w:1, o:5, a:1, s:1, b:0), 
% 1.25/1.66  diagonalise  [88, 1]      (w:1, o:55, a:1, s:1, b:0), 
% 1.25/1.66  cantor  [89, 1]      (w:1, o:43, a:1, s:1, b:0), 
% 1.25/1.66  operation  [90, 1]      (w:1, o:51, a:1, s:1, b:0), 
% 1.25/1.66  compatible  [94, 3]      (w:1, o:94, a:1, s:1, b:0), 
% 1.25/1.66  homomorphism  [95, 3]      (w:1, o:97, a:1, s:1, b:0), 
% 1.25/1.66  'not_homomorphism1'  [96, 3]      (w:1, o:98, a:1, s:1, b:0), 
% 1.25/1.66  'not_homomorphism2'  [97, 3]      (w:1, o:99, a:1, s:1, b:0), 
% 1.25/1.66  x  [98, 0]      (w:1, o:29, a:1, s:1, b:0), 
% 1.25/1.66  y  [99, 0]      (w:1, o:30, a:1, s:1, b:0).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  Starting Search:
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  Intermediate Status:
% 1.25/1.66  Generated:    4804
% 1.25/1.66  Kept:         2010
% 1.25/1.66  Inuse:        119
% 1.25/1.66  Deleted:      7
% 1.25/1.66  Deletedinuse: 3
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  Intermediate Status:
% 1.25/1.66  Generated:    10164
% 1.25/1.66  Kept:         4270
% 1.25/1.66  Inuse:        194
% 1.25/1.66  Deleted:      12
% 1.25/1.66  Deletedinuse: 5
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  Intermediate Status:
% 1.25/1.66  Generated:    14049
% 1.25/1.66  Kept:         6270
% 1.25/1.66  Inuse:        262
% 1.25/1.66  Deleted:      20
% 1.25/1.66  Deletedinuse: 9
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  Intermediate Status:
% 1.25/1.66  Generated:    19475
% 1.25/1.66  Kept:         8293
% 1.25/1.66  Inuse:        315
% 1.25/1.66  Deleted:      69
% 1.25/1.66  Deletedinuse: 56
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  Intermediate Status:
% 1.25/1.66  Generated:    25049
% 1.25/1.66  Kept:         10900
% 1.25/1.66  Inuse:        372
% 1.25/1.66  Deleted:      77
% 1.25/1.66  Deletedinuse: 63
% 1.25/1.66  
% 1.25/1.66  Resimplifying inuse:
% 1.25/1.66  Done
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  Bliksems!, er is een bewijs:
% 1.25/1.66  % SZS status Unsatisfiable
% 1.25/1.66  % SZS output start Refutation
% 1.25/1.66  
% 1.25/1.66  clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 1.25/1.66     )
% 1.25/1.66  .
% 1.25/1.66  clause( 3, [ subclass( X, 'universal_class' ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 6, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z
% 1.25/1.66     ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.25/1.66    'unordered_pair'( Y, X ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 9, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 10, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 11, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, 
% 1.25/1.66    singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 64, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 90, [ ~( =( 'unordered_pair'( singleton( x ), 'unordered_pair'( x, 
% 1.25/1.66    'null_class' ) ), 'ordered_pair'( x, y ) ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 91, [ ~( member( y, 'universal_class' ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 93, [ =( X, Y ), ~( member( X, singleton( Y ) ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 94, [ ~( =( X, Y ) ), ~( member( Z, 'unordered_pair'( X, Y ) ) ), 
% 1.25/1.66    =( Z, Y ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 105, [ ~( member( y, X ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 122, [ =( X, Y ), ~( =( Y, X ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 164, [ ~( member( X, Y ) ), ~( =( X, y ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 509, [ member( 'ordered_pair'( X, Y ), 'universal_class' ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 515, [ member( 'ordered_pair'( X, Y ), 'unordered_pair'( Z, 
% 1.25/1.66    'ordered_pair'( X, Y ) ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 9787, [ ~( member( X, singleton( y ) ) ), ~( member( X, Y ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 10899, [ ~( member( X, singleton( y ) ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 10900, [ =( singleton( y ), 'null_class' ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 10914, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, 
% 1.25/1.66    'null_class' ) ), 'ordered_pair'( X, y ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 11035, [ ~( =( X, 'ordered_pair'( x, y ) ) ), ~( =( Y, X ) ), ~( 
% 1.25/1.66    member( 'ordered_pair'( x, y ), 'unordered_pair'( Y, X ) ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 11964, [ ~( =( X, 'ordered_pair'( x, y ) ) ) ] )
% 1.25/1.66  .
% 1.25/1.66  clause( 11965, [] )
% 1.25/1.66  .
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  % SZS output end Refutation
% 1.25/1.66  found a proof!
% 1.25/1.66  
% 1.25/1.66  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 1.25/1.66  
% 1.25/1.66  initialclauses(
% 1.25/1.66  [ clause( 11967, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 1.25/1.66     ) ] )
% 1.25/1.66  , clause( 11968, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 1.25/1.66    , Y ) ] )
% 1.25/1.66  , clause( 11969, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), 
% 1.25/1.66    subclass( X, Y ) ] )
% 1.25/1.66  , clause( 11970, [ subclass( X, 'universal_class' ) ] )
% 1.25/1.66  , clause( 11971, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.25/1.66  , clause( 11972, [ ~( =( X, Y ) ), subclass( Y, X ) ] )
% 1.25/1.66  , clause( 11973, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y )
% 1.25/1.66     ] )
% 1.25/1.66  , clause( 11974, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), 
% 1.25/1.66    =( X, Z ) ] )
% 1.25/1.66  , clause( 11975, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.25/1.66    'unordered_pair'( X, Y ) ) ] )
% 1.25/1.66  , clause( 11976, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.25/1.66    'unordered_pair'( Y, X ) ) ] )
% 1.25/1.66  , clause( 11977, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 1.25/1.66     )
% 1.25/1.66  , clause( 11978, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 1.25/1.66  , clause( 11979, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 1.25/1.66    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.25/1.66  , clause( 11980, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.25/1.66     ) ) ), member( X, Z ) ] )
% 1.25/1.66  , clause( 11981, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.25/1.66     ) ) ), member( Y, T ) ] )
% 1.25/1.66  , clause( 11982, [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 
% 1.25/1.66    'ordered_pair'( X, Z ), 'cross_product'( Y, T ) ) ] )
% 1.25/1.66  , clause( 11983, [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 
% 1.25/1.66    'ordered_pair'( first( X ), second( X ) ), X ) ] )
% 1.25/1.66  , clause( 11984, [ subclass( 'element_relation', 'cross_product'( 
% 1.25/1.66    'universal_class', 'universal_class' ) ) ] )
% 1.25/1.66  , clause( 11985, [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' )
% 1.25/1.66     ), member( X, Y ) ] )
% 1.25/1.66  , clause( 11986, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 
% 1.25/1.66    'universal_class', 'universal_class' ) ) ), ~( member( X, Y ) ), member( 
% 1.25/1.66    'ordered_pair'( X, Y ), 'element_relation' ) ] )
% 1.25/1.66  , clause( 11987, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 1.25/1.66     )
% 1.25/1.66  , clause( 11988, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ]
% 1.25/1.66     )
% 1.25/1.66  , clause( 11989, [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, 
% 1.25/1.66    intersection( Y, Z ) ) ] )
% 1.25/1.66  , clause( 11990, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 1.25/1.66     )
% 1.25/1.66  , clause( 11991, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.25/1.66    complement( Y ) ), member( X, Y ) ] )
% 1.25/1.66  , clause( 11992, [ =( complement( intersection( complement( X ), complement( 
% 1.25/1.66    Y ) ) ), union( X, Y ) ) ] )
% 1.25/1.66  , clause( 11993, [ =( intersection( complement( intersection( X, Y ) ), 
% 1.25/1.66    complement( intersection( complement( X ), complement( Y ) ) ) ), 
% 1.25/1.66    'symmetric_difference'( X, Y ) ) ] )
% 1.25/1.66  , clause( 11994, [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( 
% 1.25/1.66    X, Y, Z ) ) ] )
% 1.25/1.66  , clause( 11995, [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( 
% 1.25/1.66    Z, X, Y ) ) ] )
% 1.25/1.66  , clause( 11996, [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 
% 1.25/1.66    'null_class' ) ), ~( member( Y, 'domain_of'( X ) ) ) ] )
% 1.25/1.66  , clause( 11997, [ ~( member( X, 'universal_class' ) ), =( restrict( Y, 
% 1.25/1.66    singleton( X ), 'universal_class' ), 'null_class' ), member( X, 
% 1.25/1.66    'domain_of'( Y ) ) ] )
% 1.25/1.66  , clause( 11998, [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 1.25/1.66    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 1.25/1.66  , clause( 11999, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.25/1.66    rotate( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T )
% 1.25/1.66     ] )
% 1.25/1.66  , clause( 12000, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.25/1.66    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 
% 1.25/1.66    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 1.25/1.66    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X )
% 1.25/1.66    , Y ), rotate( T ) ) ] )
% 1.25/1.66  , clause( 12001, [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 1.25/1.66    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 1.25/1.66  , clause( 12002, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.25/1.66    flip( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ]
% 1.25/1.66     )
% 1.25/1.66  , clause( 12003, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.25/1.66    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 
% 1.25/1.66    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 1.25/1.66    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X )
% 1.25/1.66    , Z ), flip( T ) ) ] )
% 1.25/1.66  , clause( 12004, [ =( 'domain_of'( flip( 'cross_product'( X, 
% 1.25/1.66    'universal_class' ) ) ), inverse( X ) ) ] )
% 1.25/1.66  , clause( 12005, [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ] )
% 1.25/1.66  , clause( 12006, [ =( first( 'not_subclass_element'( restrict( X, Y, 
% 1.25/1.66    singleton( Z ) ), 'null_class' ) ), domain( X, Y, Z ) ) ] )
% 1.25/1.66  , clause( 12007, [ =( second( 'not_subclass_element'( restrict( X, 
% 1.25/1.66    singleton( Y ), Z ), 'null_class' ) ), range( X, Y, Z ) ) ] )
% 1.25/1.66  , clause( 12008, [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), 
% 1.25/1.66    image( X, Y ) ) ] )
% 1.25/1.66  , clause( 12009, [ =( union( X, singleton( X ) ), successor( X ) ) ] )
% 1.25/1.66  , clause( 12010, [ subclass( 'successor_relation', 'cross_product'( 
% 1.25/1.66    'universal_class', 'universal_class' ) ) ] )
% 1.25/1.66  , clause( 12011, [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation'
% 1.25/1.66     ) ), =( successor( X ), Y ) ] )
% 1.25/1.66  , clause( 12012, [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( 
% 1.25/1.66    X, Y ), 'cross_product'( 'universal_class', 'universal_class' ) ) ), 
% 1.25/1.66    member( 'ordered_pair'( X, Y ), 'successor_relation' ) ] )
% 1.25/1.66  , clause( 12013, [ ~( inductive( X ) ), member( 'null_class', X ) ] )
% 1.25/1.66  , clause( 12014, [ ~( inductive( X ) ), subclass( image( 
% 1.25/1.66    'successor_relation', X ), X ) ] )
% 1.25/1.66  , clause( 12015, [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 1.25/1.66    'successor_relation', X ), X ) ), inductive( X ) ] )
% 1.25/1.66  , clause( 12016, [ inductive( omega ) ] )
% 1.25/1.66  , clause( 12017, [ ~( inductive( X ) ), subclass( omega, X ) ] )
% 1.25/1.66  , clause( 12018, [ member( omega, 'universal_class' ) ] )
% 1.25/1.66  , clause( 12019, [ =( 'domain_of'( restrict( 'element_relation', 
% 1.25/1.66    'universal_class', X ) ), 'sum_class'( X ) ) ] )
% 1.25/1.66  , clause( 12020, [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( 
% 1.25/1.66    X ), 'universal_class' ) ] )
% 1.25/1.66  , clause( 12021, [ =( complement( image( 'element_relation', complement( X
% 1.25/1.66     ) ) ), 'power_class'( X ) ) ] )
% 1.25/1.66  , clause( 12022, [ ~( member( X, 'universal_class' ) ), member( 
% 1.25/1.66    'power_class'( X ), 'universal_class' ) ] )
% 1.25/1.66  , clause( 12023, [ subclass( compose( X, Y ), 'cross_product'( 
% 1.25/1.66    'universal_class', 'universal_class' ) ) ] )
% 1.25/1.66  , clause( 12024, [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), 
% 1.25/1.66    member( Y, image( Z, image( T, singleton( X ) ) ) ) ] )
% 1.25/1.66  , clause( 12025, [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) )
% 1.25/1.66    , ~( member( 'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 1.25/1.66    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 1.25/1.66     ) ] )
% 1.25/1.66  , clause( 12026, [ ~( 'single_valued_class'( X ) ), subclass( compose( X, 
% 1.25/1.66    inverse( X ) ), 'identity_relation' ) ] )
% 1.25/1.66  , clause( 12027, [ ~( subclass( compose( X, inverse( X ) ), 
% 1.25/1.66    'identity_relation' ) ), 'single_valued_class'( X ) ] )
% 1.25/1.66  , clause( 12028, [ ~( function( X ) ), subclass( X, 'cross_product'( 
% 1.25/1.66    'universal_class', 'universal_class' ) ) ] )
% 1.25/1.66  , clause( 12029, [ ~( function( X ) ), subclass( compose( X, inverse( X ) )
% 1.25/1.66    , 'identity_relation' ) ] )
% 1.25/1.66  , clause( 12030, [ ~( subclass( X, 'cross_product'( 'universal_class', 
% 1.25/1.66    'universal_class' ) ) ), ~( subclass( compose( X, inverse( X ) ), 
% 1.25/1.66    'identity_relation' ) ), function( X ) ] )
% 1.25/1.66  , clause( 12031, [ ~( function( X ) ), ~( member( Y, 'universal_class' ) )
% 1.25/1.66    , member( image( X, Y ), 'universal_class' ) ] )
% 1.25/1.66  , clause( 12032, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 1.25/1.66  , clause( 12033, [ =( X, 'null_class' ), =( intersection( X, regular( X ) )
% 1.25/1.66    , 'null_class' ) ] )
% 1.25/1.66  , clause( 12034, [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, 
% 1.25/1.66    Y ) ) ] )
% 1.25/1.66  , clause( 12035, [ function( choice ) ] )
% 1.25/1.66  , clause( 12036, [ ~( member( X, 'universal_class' ) ), =( X, 'null_class'
% 1.25/1.66     ), member( apply( choice, X ), X ) ] )
% 1.25/1.66  , clause( 12037, [ ~( 'one_to_one'( X ) ), function( X ) ] )
% 1.25/1.66  , clause( 12038, [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ] )
% 1.25/1.66  , clause( 12039, [ ~( function( inverse( X ) ) ), ~( function( X ) ), 
% 1.25/1.66    'one_to_one'( X ) ] )
% 1.25/1.66  , clause( 12040, [ =( intersection( 'cross_product'( 'universal_class', 
% 1.25/1.66    'universal_class' ), intersection( 'cross_product'( 'universal_class', 
% 1.25/1.66    'universal_class' ), complement( compose( complement( 'element_relation'
% 1.25/1.66     ), inverse( 'element_relation' ) ) ) ) ), 'subset_relation' ) ] )
% 1.25/1.66  , clause( 12041, [ =( intersection( inverse( 'subset_relation' ), 
% 1.25/1.66    'subset_relation' ), 'identity_relation' ) ] )
% 1.25/1.66  , clause( 12042, [ =( complement( 'domain_of'( intersection( X, 
% 1.25/1.66    'identity_relation' ) ) ), diagonalise( X ) ) ] )
% 1.25/1.66  , clause( 12043, [ =( intersection( 'domain_of'( X ), diagonalise( compose( 
% 1.25/1.66    inverse( 'element_relation' ), X ) ) ), cantor( X ) ) ] )
% 1.25/1.66  , clause( 12044, [ ~( operation( X ) ), function( X ) ] )
% 1.25/1.66  , clause( 12045, [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 
% 1.25/1.66    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 1.25/1.66     ] )
% 1.25/1.66  , clause( 12046, [ ~( operation( X ) ), subclass( 'range_of'( X ), 
% 1.25/1.66    'domain_of'( 'domain_of'( X ) ) ) ] )
% 1.25/1.66  , clause( 12047, [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 
% 1.25/1.66    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 1.25/1.66     ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), 
% 1.25/1.66    operation( X ) ] )
% 1.25/1.66  , clause( 12048, [ ~( compatible( X, Y, Z ) ), function( X ) ] )
% 1.25/1.66  , clause( 12049, [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( 
% 1.25/1.66    Y ) ), 'domain_of'( X ) ) ] )
% 1.25/1.66  , clause( 12050, [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 
% 1.25/1.66    'domain_of'( 'domain_of'( Z ) ) ) ] )
% 1.25/1.66  , clause( 12051, [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y )
% 1.25/1.66     ), 'domain_of'( X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 
% 1.25/1.66    'domain_of'( Z ) ) ) ), compatible( X, Y, Z ) ] )
% 1.25/1.66  , clause( 12052, [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ] )
% 1.25/1.66  , clause( 12053, [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ] )
% 1.25/1.66  , clause( 12054, [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ] )
% 1.25/1.66  , clause( 12055, [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( 
% 1.25/1.66    T, U ), 'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T )
% 1.25/1.66    , apply( X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ]
% 1.25/1.66     )
% 1.25/1.66  , clause( 12056, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 1.25/1.66    Z, X, Y ) ), member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 1.25/1.66    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 1.25/1.66    , Y ) ] )
% 1.25/1.66  , clause( 12057, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 1.25/1.66    Z, X, Y ) ), ~( =( apply( Y, 'ordered_pair'( apply( Z, 
% 1.25/1.66    'not_homomorphism1'( Z, X, Y ) ), apply( Z, 'not_homomorphism2'( Z, X, Y
% 1.25/1.66     ) ) ) ), apply( Z, apply( X, 'ordered_pair'( 'not_homomorphism1'( Z, X, 
% 1.25/1.66    Y ), 'not_homomorphism2'( Z, X, Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ]
% 1.25/1.66     )
% 1.25/1.66  , clause( 12058, [ ~( =( 'unordered_pair'( singleton( x ), 'unordered_pair'( 
% 1.25/1.66    x, 'null_class' ) ), 'ordered_pair'( x, y ) ) ) ] )
% 1.25/1.66  , clause( 12059, [ ~( member( y, 'universal_class' ) ) ] )
% 1.25/1.66  ] ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 1.25/1.66     )
% 1.25/1.66  , clause( 11967, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 1.25/1.66     ) ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 1.25/1.66    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 3, [ subclass( X, 'universal_class' ) ] )
% 1.25/1.66  , clause( 11970, [ subclass( X, 'universal_class' ) ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.25/1.66  , clause( 11971, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.25/1.66     ), ==>( 1, 1 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 1.25/1.66  , clause( 11973, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y )
% 1.25/1.66     ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.25/1.66     ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 6, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z
% 1.25/1.66     ) ] )
% 1.25/1.66  , clause( 11974, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), 
% 1.25/1.66    =( X, Z ) ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 1.25/1.66    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.25/1.66    'unordered_pair'( Y, X ) ) ] )
% 1.25/1.66  , clause( 11976, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.25/1.66    'unordered_pair'( Y, X ) ) ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.25/1.66     ), ==>( 1, 1 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 9, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ] )
% 1.25/1.66  , clause( 11977, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 1.25/1.66     )
% 1.25/1.66  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.25/1.66     )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 10, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 1.25/1.66  , clause( 11978, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 11, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, 
% 1.25/1.66    singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.25/1.66  , clause( 11979, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 1.25/1.66    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.25/1.66     )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 64, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 1.25/1.66  , clause( 12032, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 
% 1.25/1.66    1 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 90, [ ~( =( 'unordered_pair'( singleton( x ), 'unordered_pair'( x, 
% 1.25/1.66    'null_class' ) ), 'ordered_pair'( x, y ) ) ) ] )
% 1.25/1.66  , clause( 12058, [ ~( =( 'unordered_pair'( singleton( x ), 'unordered_pair'( 
% 1.25/1.66    x, 'null_class' ) ), 'ordered_pair'( x, y ) ) ) ] )
% 1.25/1.66  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 91, [ ~( member( y, 'universal_class' ) ) ] )
% 1.25/1.66  , clause( 12059, [ ~( member( y, 'universal_class' ) ) ] )
% 1.25/1.66  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  factor(
% 1.25/1.66  clause( 12247, [ ~( member( X, 'unordered_pair'( Y, Y ) ) ), =( X, Y ) ] )
% 1.25/1.66  , clause( 6, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X
% 1.25/1.66    , Z ) ] )
% 1.25/1.66  , 1, 2, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Y )] )).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  paramod(
% 1.25/1.66  clause( 12248, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 1.25/1.66  , clause( 10, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 1.25/1.66  , 0, clause( 12247, [ ~( member( X, 'unordered_pair'( Y, Y ) ) ), =( X, Y )
% 1.25/1.66     ] )
% 1.25/1.66  , 0, 3, substitution( 0, [ :=( X, Y )] ), substitution( 1, [ :=( X, X ), 
% 1.25/1.66    :=( Y, Y )] )).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 93, [ =( X, Y ), ~( member( X, singleton( Y ) ) ) ] )
% 1.25/1.66  , clause( 12248, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 1.25/1.66  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 1
% 1.25/1.66     ), ==>( 1, 0 )] ) ).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  eqfact(
% 1.25/1.66  clause( 12267, [ ~( =( X, Y ) ), ~( member( Z, 'unordered_pair'( X, Y ) ) )
% 1.25/1.66    , =( Z, Y ) ] )
% 1.25/1.66  , clause( 6, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X
% 1.25/1.66    , Z ) ] )
% 1.25/1.66  , 1, 2, substitution( 0, [ :=( X, Z ), :=( Y, X ), :=( Z, Y )] )).
% 1.25/1.66  
% 1.25/1.66  
% 1.25/1.66  subsumption(
% 1.25/1.66  clause( 94, [ ~( =( X, Y ) ), ~( member( Z, 'unordered_pair'( X, Y ) ) ), 
% 1.25/1.66    =( Z, Y ) ] )
% 1.25/1.66  , clause( 12267, [ ~( =( X, Y ) ), ~( member( Z, 'unordered_pair'( X, Y ) )
% 1.25/1.66     ), =( Z, Y ) ] )
% 1.25/1.66  , sCputime limit exceeded (core dumped)
%------------------------------------------------------------------------------