TSTP Solution File: SET079-6 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : SET079-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n003.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 22:46:41 EDT 2022

% Result   : Unsatisfiable 0.73s 1.35s
% Output   : Refutation 0.73s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.12  % Problem  : SET079-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.03/0.12  % Command  : bliksem %s
% 0.13/0.33  % Computer : n003.cluster.edu
% 0.13/0.33  % Model    : x86_64 x86_64
% 0.13/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.33  % Memory   : 8042.1875MB
% 0.13/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.13/0.33  % CPULimit : 300
% 0.13/0.33  % DateTime : Sat Jul  9 20:32:28 EDT 2022
% 0.13/0.33  % CPUTime  : 
% 0.43/1.08  *** allocated 10000 integers for termspace/termends
% 0.43/1.08  *** allocated 10000 integers for clauses
% 0.43/1.08  *** allocated 10000 integers for justifications
% 0.43/1.08  Bliksem 1.12
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  Automatic Strategy Selection
% 0.43/1.08  
% 0.43/1.08  Clauses:
% 0.43/1.08  [
% 0.43/1.08     [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ],
% 0.43/1.08     [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y ) ],
% 0.43/1.08     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), subclass( X, Y ) ]
% 0.43/1.08    ,
% 0.43/1.08     [ subclass( X, 'universal_class' ) ],
% 0.43/1.08     [ ~( =( X, Y ) ), subclass( X, Y ) ],
% 0.43/1.08     [ ~( =( X, Y ) ), subclass( Y, X ) ],
% 0.43/1.08     [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ],
% 0.43/1.08     [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z ) ]
% 0.43/1.08    ,
% 0.43/1.08     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( X, Y
% 0.43/1.08     ) ) ],
% 0.43/1.08     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( Y, X
% 0.43/1.08     ) ) ],
% 0.43/1.08     [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ],
% 0.43/1.08     [ =( 'unordered_pair'( X, X ), singleton( X ) ) ],
% 0.43/1.08     [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, singleton( Y
% 0.43/1.08     ) ) ), 'ordered_pair'( X, Y ) ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.43/1.08    X, Z ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.43/1.08    Y, T ) ],
% 0.43/1.08     [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 'ordered_pair'( X, Z
% 0.43/1.08     ), 'cross_product'( Y, T ) ) ],
% 0.43/1.08     [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 'ordered_pair'( first( X
% 0.43/1.08     ), second( X ) ), X ) ],
% 0.43/1.08     [ subclass( 'element_relation', 'cross_product'( 'universal_class', 
% 0.43/1.08    'universal_class' ) ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) ), member( X, 
% 0.43/1.08    Y ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 'universal_class'
% 0.43/1.08    , 'universal_class' ) ) ), ~( member( X, Y ) ), member( 'ordered_pair'( X
% 0.43/1.08    , Y ), 'element_relation' ) ],
% 0.43/1.08     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ],
% 0.43/1.08     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ],
% 0.43/1.08     [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, intersection( Y, 
% 0.43/1.08    Z ) ) ],
% 0.43/1.08     [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ],
% 0.43/1.08     [ ~( member( X, 'universal_class' ) ), member( X, complement( Y ) ), 
% 0.43/1.08    member( X, Y ) ],
% 0.43/1.08     [ =( complement( intersection( complement( X ), complement( Y ) ) ), 
% 0.43/1.08    union( X, Y ) ) ],
% 0.43/1.08     [ =( intersection( complement( intersection( X, Y ) ), complement( 
% 0.43/1.08    intersection( complement( X ), complement( Y ) ) ) ), 
% 0.43/1.08    'symmetric_difference'( X, Y ) ) ],
% 0.43/1.08     [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( X, Y, Z ) ) ]
% 0.43/1.08    ,
% 0.43/1.08     [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( Z, X, Y ) ) ]
% 0.43/1.08    ,
% 0.43/1.08     [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 'null_class' )
% 0.43/1.08     ), ~( member( Y, 'domain_of'( X ) ) ) ],
% 0.43/1.08     [ ~( member( X, 'universal_class' ) ), =( restrict( Y, singleton( X ), 
% 0.43/1.08    'universal_class' ), 'null_class' ), member( X, 'domain_of'( Y ) ) ],
% 0.43/1.08     [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.43/1.08    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), rotate( T ) )
% 0.43/1.08     ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.43/1.08    member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 'cross_product'( 
% 0.43/1.08    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.43/1.08    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X ), 
% 0.43/1.08    Y ), rotate( T ) ) ],
% 0.43/1.08     [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.43/1.08    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), flip( T ) ) )
% 0.43/1.08    , member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.43/1.08    member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 'cross_product'( 
% 0.43/1.08    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.43/1.08    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), 
% 0.43/1.08    Z ), flip( T ) ) ],
% 0.43/1.08     [ =( 'domain_of'( flip( 'cross_product'( X, 'universal_class' ) ) ), 
% 0.43/1.08    inverse( X ) ) ],
% 0.43/1.08     [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ],
% 0.43/1.08     [ =( first( 'not_subclass_element'( restrict( X, Y, singleton( Z ) ), 
% 0.43/1.08    'null_class' ) ), domain( X, Y, Z ) ) ],
% 0.43/1.08     [ =( second( 'not_subclass_element'( restrict( X, singleton( Y ), Z ), 
% 0.43/1.08    'null_class' ) ), range( X, Y, Z ) ) ],
% 0.43/1.08     [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), image( X, Y ) )
% 0.43/1.08     ],
% 0.43/1.08     [ =( union( X, singleton( X ) ), successor( X ) ) ],
% 0.43/1.08     [ subclass( 'successor_relation', 'cross_product'( 'universal_class', 
% 0.43/1.08    'universal_class' ) ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' ) ), =( 
% 0.43/1.08    successor( X ), Y ) ],
% 0.43/1.08     [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X, Y ), 
% 0.43/1.08    'cross_product'( 'universal_class', 'universal_class' ) ) ), member( 
% 0.43/1.08    'ordered_pair'( X, Y ), 'successor_relation' ) ],
% 0.43/1.08     [ ~( inductive( X ) ), member( 'null_class', X ) ],
% 0.43/1.08     [ ~( inductive( X ) ), subclass( image( 'successor_relation', X ), X ) ]
% 0.43/1.08    ,
% 0.43/1.08     [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.43/1.08    'successor_relation', X ), X ) ), inductive( X ) ],
% 0.43/1.08     [ inductive( omega ) ],
% 0.43/1.08     [ ~( inductive( X ) ), subclass( omega, X ) ],
% 0.43/1.08     [ member( omega, 'universal_class' ) ],
% 0.43/1.08     [ =( 'domain_of'( restrict( 'element_relation', 'universal_class', X ) )
% 0.43/1.08    , 'sum_class'( X ) ) ],
% 0.43/1.08     [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( X ), 
% 0.43/1.08    'universal_class' ) ],
% 0.43/1.08     [ =( complement( image( 'element_relation', complement( X ) ) ), 
% 0.43/1.08    'power_class'( X ) ) ],
% 0.43/1.08     [ ~( member( X, 'universal_class' ) ), member( 'power_class'( X ), 
% 0.43/1.08    'universal_class' ) ],
% 0.43/1.08     [ subclass( compose( X, Y ), 'cross_product'( 'universal_class', 
% 0.43/1.08    'universal_class' ) ) ],
% 0.43/1.08     [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), member( Y, 
% 0.43/1.08    image( Z, image( T, singleton( X ) ) ) ) ],
% 0.43/1.08     [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) ), ~( member( 
% 0.43/1.08    'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.43/1.08    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.43/1.08     ) ],
% 0.43/1.09     [ ~( 'single_valued_class'( X ) ), subclass( compose( X, inverse( X ) )
% 0.43/1.09    , 'identity_relation' ) ],
% 0.43/1.09     [ ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) ), 
% 0.43/1.09    'single_valued_class'( X ) ],
% 0.43/1.09     [ ~( function( X ) ), subclass( X, 'cross_product'( 'universal_class', 
% 0.43/1.09    'universal_class' ) ) ],
% 0.43/1.09     [ ~( function( X ) ), subclass( compose( X, inverse( X ) ), 
% 0.43/1.09    'identity_relation' ) ],
% 0.43/1.09     [ ~( subclass( X, 'cross_product'( 'universal_class', 'universal_class'
% 0.43/1.09     ) ) ), ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) )
% 0.43/1.09    , function( X ) ],
% 0.43/1.09     [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), member( image( 
% 0.43/1.09    X, Y ), 'universal_class' ) ],
% 0.43/1.09     [ =( X, 'null_class' ), member( regular( X ), X ) ],
% 0.43/1.09     [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 'null_class'
% 0.43/1.09     ) ],
% 0.43/1.09     [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y ) ) ],
% 0.43/1.09     [ function( choice ) ],
% 0.43/1.09     [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' ), member( 
% 0.43/1.09    apply( choice, X ), X ) ],
% 0.43/1.09     [ ~( 'one_to_one'( X ) ), function( X ) ],
% 0.43/1.09     [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ],
% 0.43/1.09     [ ~( function( inverse( X ) ) ), ~( function( X ) ), 'one_to_one'( X ) ]
% 0.43/1.09    ,
% 0.43/1.09     [ =( intersection( 'cross_product'( 'universal_class', 'universal_class'
% 0.43/1.09     ), intersection( 'cross_product'( 'universal_class', 'universal_class' )
% 0.43/1.09    , complement( compose( complement( 'element_relation' ), inverse( 
% 0.43/1.09    'element_relation' ) ) ) ) ), 'subset_relation' ) ],
% 0.43/1.09     [ =( intersection( inverse( 'subset_relation' ), 'subset_relation' ), 
% 0.43/1.09    'identity_relation' ) ],
% 0.43/1.09     [ =( complement( 'domain_of'( intersection( X, 'identity_relation' ) ) )
% 0.43/1.09    , diagonalise( X ) ) ],
% 0.43/1.09     [ =( intersection( 'domain_of'( X ), diagonalise( compose( inverse( 
% 0.43/1.09    'element_relation' ), X ) ) ), cantor( X ) ) ],
% 0.43/1.09     [ ~( operation( X ) ), function( X ) ],
% 0.43/1.09     [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 'domain_of'( X )
% 0.43/1.09     ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ],
% 0.43/1.09     [ ~( operation( X ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.73/1.35    'domain_of'( X ) ) ) ],
% 0.73/1.35     [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 'domain_of'( X
% 0.73/1.35     ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ), ~( 
% 0.73/1.35    subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), operation( 
% 0.73/1.35    X ) ],
% 0.73/1.35     [ ~( compatible( X, Y, Z ) ), function( X ) ],
% 0.73/1.35     [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( Y ) ), 
% 0.73/1.35    'domain_of'( X ) ) ],
% 0.73/1.35     [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.73/1.35    'domain_of'( Z ) ) ) ],
% 0.73/1.35     [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) ), 'domain_of'( 
% 0.73/1.35    X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( Z ) ) )
% 0.73/1.35     ), compatible( X, Y, Z ) ],
% 0.73/1.35     [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ],
% 0.73/1.35     [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ],
% 0.73/1.35     [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ],
% 0.73/1.35     [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( T, U ), 
% 0.73/1.35    'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T ), apply( 
% 0.73/1.35    X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ],
% 0.73/1.35     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.73/1.35    member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 0.73/1.35    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 0.73/1.35    , Y ) ],
% 0.73/1.35     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.73/1.35    ~( =( apply( Y, 'ordered_pair'( apply( Z, 'not_homomorphism1'( Z, X, Y )
% 0.73/1.35     ), apply( Z, 'not_homomorphism2'( Z, X, Y ) ) ) ), apply( Z, apply( X, 
% 0.73/1.35    'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 'not_homomorphism2'( Z, X
% 0.73/1.35    , Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ],
% 0.73/1.35     [ member( x, 'universal_class' ) ],
% 0.73/1.35     [ =( singleton( x ), 'null_class' ) ]
% 0.73/1.35  ] .
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  percentage equality = 0.218579, percentage horn = 0.913978
% 0.73/1.35  This is a problem with some equality
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  Options Used:
% 0.73/1.35  
% 0.73/1.35  useres =            1
% 0.73/1.35  useparamod =        1
% 0.73/1.35  useeqrefl =         1
% 0.73/1.35  useeqfact =         1
% 0.73/1.35  usefactor =         1
% 0.73/1.35  usesimpsplitting =  0
% 0.73/1.35  usesimpdemod =      5
% 0.73/1.35  usesimpres =        3
% 0.73/1.35  
% 0.73/1.35  resimpinuse      =  1000
% 0.73/1.35  resimpclauses =     20000
% 0.73/1.35  substype =          eqrewr
% 0.73/1.35  backwardsubs =      1
% 0.73/1.35  selectoldest =      5
% 0.73/1.35  
% 0.73/1.35  litorderings [0] =  split
% 0.73/1.35  litorderings [1] =  extend the termordering, first sorting on arguments
% 0.73/1.35  
% 0.73/1.35  termordering =      kbo
% 0.73/1.35  
% 0.73/1.35  litapriori =        0
% 0.73/1.35  termapriori =       1
% 0.73/1.35  litaposteriori =    0
% 0.73/1.35  termaposteriori =   0
% 0.73/1.35  demodaposteriori =  0
% 0.73/1.35  ordereqreflfact =   0
% 0.73/1.35  
% 0.73/1.35  litselect =         negord
% 0.73/1.35  
% 0.73/1.35  maxweight =         15
% 0.73/1.35  maxdepth =          30000
% 0.73/1.35  maxlength =         115
% 0.73/1.35  maxnrvars =         195
% 0.73/1.35  excuselevel =       1
% 0.73/1.35  increasemaxweight = 1
% 0.73/1.35  
% 0.73/1.35  maxselected =       10000000
% 0.73/1.35  maxnrclauses =      10000000
% 0.73/1.35  
% 0.73/1.35  showgenerated =    0
% 0.73/1.35  showkept =         0
% 0.73/1.35  showselected =     0
% 0.73/1.35  showdeleted =      0
% 0.73/1.35  showresimp =       1
% 0.73/1.35  showstatus =       2000
% 0.73/1.35  
% 0.73/1.35  prologoutput =     1
% 0.73/1.35  nrgoals =          5000000
% 0.73/1.35  totalproof =       1
% 0.73/1.35  
% 0.73/1.35  Symbols occurring in the translation:
% 0.73/1.35  
% 0.73/1.35  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 0.73/1.35  .  [1, 2]      (w:1, o:55, a:1, s:1, b:0), 
% 0.73/1.35  !  [4, 1]      (w:0, o:30, a:1, s:1, b:0), 
% 0.73/1.35  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.73/1.35  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.73/1.35  subclass  [41, 2]      (w:1, o:80, a:1, s:1, b:0), 
% 0.73/1.35  member  [43, 2]      (w:1, o:81, a:1, s:1, b:0), 
% 0.73/1.35  'not_subclass_element'  [44, 2]      (w:1, o:82, a:1, s:1, b:0), 
% 0.73/1.35  'universal_class'  [45, 0]      (w:1, o:21, a:1, s:1, b:0), 
% 0.73/1.35  'unordered_pair'  [46, 2]      (w:1, o:83, a:1, s:1, b:0), 
% 0.73/1.35  singleton  [47, 1]      (w:1, o:38, a:1, s:1, b:0), 
% 0.73/1.35  'ordered_pair'  [48, 2]      (w:1, o:84, a:1, s:1, b:0), 
% 0.73/1.35  'cross_product'  [50, 2]      (w:1, o:85, a:1, s:1, b:0), 
% 0.73/1.35  first  [52, 1]      (w:1, o:39, a:1, s:1, b:0), 
% 0.73/1.35  second  [53, 1]      (w:1, o:40, a:1, s:1, b:0), 
% 0.73/1.35  'element_relation'  [54, 0]      (w:1, o:25, a:1, s:1, b:0), 
% 0.73/1.35  intersection  [55, 2]      (w:1, o:87, a:1, s:1, b:0), 
% 0.73/1.35  complement  [56, 1]      (w:1, o:41, a:1, s:1, b:0), 
% 0.73/1.35  union  [57, 2]      (w:1, o:88, a:1, s:1, b:0), 
% 0.73/1.35  'symmetric_difference'  [58, 2]      (w:1, o:89, a:1, s:1, b:0), 
% 0.73/1.35  restrict  [60, 3]      (w:1, o:92, a:1, s:1, b:0), 
% 0.73/1.35  'null_class'  [61, 0]      (w:1, o:26, a:1, s:1, b:0), 
% 0.73/1.35  'domain_of'  [62, 1]      (w:1, o:43, a:1, s:1, b:0), 
% 0.73/1.35  rotate  [63, 1]      (w:1, o:35, a:1, s:1, b:0), 
% 0.73/1.35  flip  [65, 1]      (w:1, o:44, a:1, s:1, b:0), 
% 0.73/1.35  inverse  [66, 1]      (w:1, o:45, a:1, s:1, b:0), 
% 0.73/1.35  'range_of'  [67, 1]      (w:1, o:36, a:1, s:1, b:0), 
% 0.73/1.35  domain  [68, 3]      (w:1, o:94, a:1, s:1, b:0), 
% 0.73/1.35  range  [69, 3]      (w:1, o:95, a:1, s:1, b:0), 
% 0.73/1.35  image  [70, 2]      (w:1, o:86, a:1, s:1, b:0), 
% 0.73/1.35  successor  [71, 1]      (w:1, o:46, a:1, s:1, b:0), 
% 0.73/1.35  'successor_relation'  [72, 0]      (w:1, o:6, a:1, s:1, b:0), 
% 0.73/1.35  inductive  [73, 1]      (w:1, o:47, a:1, s:1, b:0), 
% 0.73/1.35  omega  [74, 0]      (w:1, o:9, a:1, s:1, b:0), 
% 0.73/1.35  'sum_class'  [75, 1]      (w:1, o:48, a:1, s:1, b:0), 
% 0.73/1.35  'power_class'  [76, 1]      (w:1, o:51, a:1, s:1, b:0), 
% 0.73/1.35  compose  [78, 2]      (w:1, o:90, a:1, s:1, b:0), 
% 0.73/1.35  'single_valued_class'  [79, 1]      (w:1, o:52, a:1, s:1, b:0), 
% 0.73/1.35  'identity_relation'  [80, 0]      (w:1, o:27, a:1, s:1, b:0), 
% 0.73/1.35  function  [82, 1]      (w:1, o:53, a:1, s:1, b:0), 
% 0.73/1.35  regular  [83, 1]      (w:1, o:37, a:1, s:1, b:0), 
% 0.73/1.35  apply  [84, 2]      (w:1, o:91, a:1, s:1, b:0), 
% 0.73/1.35  choice  [85, 0]      (w:1, o:28, a:1, s:1, b:0), 
% 0.73/1.35  'one_to_one'  [86, 1]      (w:1, o:49, a:1, s:1, b:0), 
% 0.73/1.35  'subset_relation'  [87, 0]      (w:1, o:5, a:1, s:1, b:0), 
% 0.73/1.35  diagonalise  [88, 1]      (w:1, o:54, a:1, s:1, b:0), 
% 0.73/1.35  cantor  [89, 1]      (w:1, o:42, a:1, s:1, b:0), 
% 0.73/1.35  operation  [90, 1]      (w:1, o:50, a:1, s:1, b:0), 
% 0.73/1.35  compatible  [94, 3]      (w:1, o:93, a:1, s:1, b:0), 
% 0.73/1.35  homomorphism  [95, 3]      (w:1, o:96, a:1, s:1, b:0), 
% 0.73/1.35  'not_homomorphism1'  [96, 3]      (w:1, o:97, a:1, s:1, b:0), 
% 0.73/1.35  'not_homomorphism2'  [97, 3]      (w:1, o:98, a:1, s:1, b:0), 
% 0.73/1.35  x  [98, 0]      (w:1, o:29, a:1, s:1, b:0).
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  Starting Search:
% 0.73/1.35  
% 0.73/1.35  Resimplifying inuse:
% 0.73/1.35  Done
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  Intermediate Status:
% 0.73/1.35  Generated:    5717
% 0.73/1.35  Kept:         2004
% 0.73/1.35  Inuse:        111
% 0.73/1.35  Deleted:      3
% 0.73/1.35  Deletedinuse: 2
% 0.73/1.35  
% 0.73/1.35  Resimplifying inuse:
% 0.73/1.35  Done
% 0.73/1.35  
% 0.73/1.35  Resimplifying inuse:
% 0.73/1.35  Done
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  Intermediate Status:
% 0.73/1.35  Generated:    11246
% 0.73/1.35  Kept:         4396
% 0.73/1.35  Inuse:        193
% 0.73/1.35  Deleted:      22
% 0.73/1.35  Deletedinuse: 14
% 0.73/1.35  
% 0.73/1.35  Resimplifying inuse:
% 0.73/1.35  Done
% 0.73/1.35  
% 0.73/1.35  Resimplifying inuse:
% 0.73/1.35  Done
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  Intermediate Status:
% 0.73/1.35  Generated:    15478
% 0.73/1.35  Kept:         6408
% 0.73/1.35  Inuse:        257
% 0.73/1.35  Deleted:      30
% 0.73/1.35  Deletedinuse: 17
% 0.73/1.35  
% 0.73/1.35  Resimplifying inuse:
% 0.73/1.35  Done
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  Bliksems!, er is een bewijs:
% 0.73/1.35  % SZS status Unsatisfiable
% 0.73/1.35  % SZS output start Refutation
% 0.73/1.35  
% 0.73/1.35  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.73/1.35    'unordered_pair'( Y, X ) ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 10, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 19, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 22, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 65, [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 
% 0.73/1.35    'null_class' ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 90, [ member( x, 'universal_class' ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 91, [ =( singleton( x ), 'null_class' ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 122, [ =( X, Y ), ~( =( Y, X ) ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 435, [ member( x, 'unordered_pair'( X, x ) ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 483, [ member( x, 'null_class' ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 498, [ member( x, X ), ~( =( X, 'null_class' ) ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 1362, [ member( x, X ), ~( =( intersection( X, Y ), 'null_class' )
% 0.73/1.35     ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 1756, [ ~( member( x, complement( 'null_class' ) ) ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 7132, [ member( x, X ) ] )
% 0.73/1.35  .
% 0.73/1.35  clause( 7334, [] )
% 0.73/1.35  .
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  % SZS output end Refutation
% 0.73/1.35  found a proof!
% 0.73/1.35  
% 0.73/1.35  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.73/1.35  
% 0.73/1.35  initialclauses(
% 0.73/1.35  [ clause( 7336, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 0.73/1.35     ) ] )
% 0.73/1.35  , clause( 7337, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 0.73/1.35    , Y ) ] )
% 0.73/1.35  , clause( 7338, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), 
% 0.73/1.35    subclass( X, Y ) ] )
% 0.73/1.35  , clause( 7339, [ subclass( X, 'universal_class' ) ] )
% 0.73/1.35  , clause( 7340, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 0.73/1.35  , clause( 7341, [ ~( =( X, Y ) ), subclass( Y, X ) ] )
% 0.73/1.35  , clause( 7342, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ]
% 0.73/1.35     )
% 0.73/1.35  , clause( 7343, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), 
% 0.73/1.35    =( X, Z ) ] )
% 0.73/1.35  , clause( 7344, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.73/1.35    'unordered_pair'( X, Y ) ) ] )
% 0.73/1.35  , clause( 7345, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.73/1.35    'unordered_pair'( Y, X ) ) ] )
% 0.73/1.35  , clause( 7346, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 0.73/1.35     )
% 0.73/1.35  , clause( 7347, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 0.73/1.35  , clause( 7348, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 0.73/1.35    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 0.73/1.35  , clause( 7349, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 0.73/1.35     ) ) ), member( X, Z ) ] )
% 0.73/1.35  , clause( 7350, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 0.73/1.35     ) ) ), member( Y, T ) ] )
% 0.73/1.35  , clause( 7351, [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 
% 0.73/1.35    'ordered_pair'( X, Z ), 'cross_product'( Y, T ) ) ] )
% 0.73/1.35  , clause( 7352, [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 
% 0.73/1.35    'ordered_pair'( first( X ), second( X ) ), X ) ] )
% 0.73/1.35  , clause( 7353, [ subclass( 'element_relation', 'cross_product'( 
% 0.73/1.35    'universal_class', 'universal_class' ) ) ] )
% 0.73/1.35  , clause( 7354, [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) )
% 0.73/1.35    , member( X, Y ) ] )
% 0.73/1.35  , clause( 7355, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 
% 0.73/1.35    'universal_class', 'universal_class' ) ) ), ~( member( X, Y ) ), member( 
% 0.73/1.35    'ordered_pair'( X, Y ), 'element_relation' ) ] )
% 0.73/1.35  , clause( 7356, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 0.73/1.35     )
% 0.73/1.35  , clause( 7357, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ]
% 0.73/1.35     )
% 0.73/1.35  , clause( 7358, [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, 
% 0.73/1.35    intersection( Y, Z ) ) ] )
% 0.73/1.35  , clause( 7359, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 0.73/1.35     )
% 0.73/1.35  , clause( 7360, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.73/1.35    complement( Y ) ), member( X, Y ) ] )
% 0.73/1.35  , clause( 7361, [ =( complement( intersection( complement( X ), complement( 
% 0.73/1.35    Y ) ) ), union( X, Y ) ) ] )
% 0.73/1.35  , clause( 7362, [ =( intersection( complement( intersection( X, Y ) ), 
% 0.73/1.35    complement( intersection( complement( X ), complement( Y ) ) ) ), 
% 0.73/1.35    'symmetric_difference'( X, Y ) ) ] )
% 0.73/1.35  , clause( 7363, [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( 
% 0.73/1.35    X, Y, Z ) ) ] )
% 0.73/1.35  , clause( 7364, [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( 
% 0.73/1.35    Z, X, Y ) ) ] )
% 0.73/1.35  , clause( 7365, [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 
% 0.73/1.35    'null_class' ) ), ~( member( Y, 'domain_of'( X ) ) ) ] )
% 0.73/1.35  , clause( 7366, [ ~( member( X, 'universal_class' ) ), =( restrict( Y, 
% 0.73/1.35    singleton( X ), 'universal_class' ), 'null_class' ), member( X, 
% 0.73/1.35    'domain_of'( Y ) ) ] )
% 0.73/1.35  , clause( 7367, [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.73/1.35    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 0.73/1.35  , clause( 7368, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 0.73/1.35    rotate( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T )
% 0.73/1.35     ] )
% 0.73/1.35  , clause( 7369, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T
% 0.73/1.35     ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 
% 0.73/1.35    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 0.73/1.35    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X )
% 0.73/1.35    , Y ), rotate( T ) ) ] )
% 0.73/1.35  , clause( 7370, [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.73/1.35    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 0.73/1.35  , clause( 7371, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 0.73/1.35    flip( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ]
% 0.73/1.35     )
% 0.73/1.35  , clause( 7372, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T
% 0.73/1.35     ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 
% 0.73/1.35    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 0.73/1.35    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X )
% 0.73/1.35    , Z ), flip( T ) ) ] )
% 0.73/1.35  , clause( 7373, [ =( 'domain_of'( flip( 'cross_product'( X, 
% 0.73/1.35    'universal_class' ) ) ), inverse( X ) ) ] )
% 0.73/1.35  , clause( 7374, [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ] )
% 0.73/1.35  , clause( 7375, [ =( first( 'not_subclass_element'( restrict( X, Y, 
% 0.73/1.35    singleton( Z ) ), 'null_class' ) ), domain( X, Y, Z ) ) ] )
% 0.73/1.35  , clause( 7376, [ =( second( 'not_subclass_element'( restrict( X, singleton( 
% 0.73/1.35    Y ), Z ), 'null_class' ) ), range( X, Y, Z ) ) ] )
% 0.73/1.35  , clause( 7377, [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), 
% 0.73/1.35    image( X, Y ) ) ] )
% 0.73/1.35  , clause( 7378, [ =( union( X, singleton( X ) ), successor( X ) ) ] )
% 0.73/1.35  , clause( 7379, [ subclass( 'successor_relation', 'cross_product'( 
% 0.73/1.35    'universal_class', 'universal_class' ) ) ] )
% 0.73/1.35  , clause( 7380, [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' )
% 0.73/1.35     ), =( successor( X ), Y ) ] )
% 0.73/1.35  , clause( 7381, [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X
% 0.73/1.35    , Y ), 'cross_product'( 'universal_class', 'universal_class' ) ) ), 
% 0.73/1.35    member( 'ordered_pair'( X, Y ), 'successor_relation' ) ] )
% 0.73/1.35  , clause( 7382, [ ~( inductive( X ) ), member( 'null_class', X ) ] )
% 0.73/1.35  , clause( 7383, [ ~( inductive( X ) ), subclass( image( 
% 0.73/1.35    'successor_relation', X ), X ) ] )
% 0.73/1.35  , clause( 7384, [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.73/1.35    'successor_relation', X ), X ) ), inductive( X ) ] )
% 0.73/1.35  , clause( 7385, [ inductive( omega ) ] )
% 0.73/1.35  , clause( 7386, [ ~( inductive( X ) ), subclass( omega, X ) ] )
% 0.73/1.35  , clause( 7387, [ member( omega, 'universal_class' ) ] )
% 0.73/1.35  , clause( 7388, [ =( 'domain_of'( restrict( 'element_relation', 
% 0.73/1.35    'universal_class', X ) ), 'sum_class'( X ) ) ] )
% 0.73/1.35  , clause( 7389, [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( 
% 0.73/1.35    X ), 'universal_class' ) ] )
% 0.73/1.35  , clause( 7390, [ =( complement( image( 'element_relation', complement( X )
% 0.73/1.35     ) ), 'power_class'( X ) ) ] )
% 0.73/1.35  , clause( 7391, [ ~( member( X, 'universal_class' ) ), member( 
% 0.73/1.35    'power_class'( X ), 'universal_class' ) ] )
% 0.73/1.35  , clause( 7392, [ subclass( compose( X, Y ), 'cross_product'( 
% 0.73/1.35    'universal_class', 'universal_class' ) ) ] )
% 0.73/1.35  , clause( 7393, [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), 
% 0.73/1.35    member( Y, image( Z, image( T, singleton( X ) ) ) ) ] )
% 0.73/1.35  , clause( 7394, [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) )
% 0.73/1.35    , ~( member( 'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.73/1.35    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.73/1.35     ) ] )
% 0.73/1.35  , clause( 7395, [ ~( 'single_valued_class'( X ) ), subclass( compose( X, 
% 0.73/1.35    inverse( X ) ), 'identity_relation' ) ] )
% 0.73/1.35  , clause( 7396, [ ~( subclass( compose( X, inverse( X ) ), 
% 0.73/1.35    'identity_relation' ) ), 'single_valued_class'( X ) ] )
% 0.73/1.35  , clause( 7397, [ ~( function( X ) ), subclass( X, 'cross_product'( 
% 0.73/1.35    'universal_class', 'universal_class' ) ) ] )
% 0.73/1.35  , clause( 7398, [ ~( function( X ) ), subclass( compose( X, inverse( X ) )
% 0.73/1.35    , 'identity_relation' ) ] )
% 0.73/1.35  , clause( 7399, [ ~( subclass( X, 'cross_product'( 'universal_class', 
% 0.73/1.35    'universal_class' ) ) ), ~( subclass( compose( X, inverse( X ) ), 
% 0.73/1.35    'identity_relation' ) ), function( X ) ] )
% 0.73/1.35  , clause( 7400, [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), 
% 0.73/1.35    member( image( X, Y ), 'universal_class' ) ] )
% 0.73/1.35  , clause( 7401, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 0.73/1.35  , clause( 7402, [ =( X, 'null_class' ), =( intersection( X, regular( X ) )
% 0.73/1.35    , 'null_class' ) ] )
% 0.73/1.35  , clause( 7403, [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y
% 0.73/1.35     ) ) ] )
% 0.73/1.35  , clause( 7404, [ function( choice ) ] )
% 0.73/1.35  , clause( 7405, [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' )
% 0.73/1.35    , member( apply( choice, X ), X ) ] )
% 0.73/1.35  , clause( 7406, [ ~( 'one_to_one'( X ) ), function( X ) ] )
% 0.73/1.35  , clause( 7407, [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ] )
% 0.73/1.35  , clause( 7408, [ ~( function( inverse( X ) ) ), ~( function( X ) ), 
% 0.73/1.35    'one_to_one'( X ) ] )
% 0.73/1.35  , clause( 7409, [ =( intersection( 'cross_product'( 'universal_class', 
% 0.73/1.35    'universal_class' ), intersection( 'cross_product'( 'universal_class', 
% 0.73/1.35    'universal_class' ), complement( compose( complement( 'element_relation'
% 0.73/1.35     ), inverse( 'element_relation' ) ) ) ) ), 'subset_relation' ) ] )
% 0.73/1.35  , clause( 7410, [ =( intersection( inverse( 'subset_relation' ), 
% 0.73/1.35    'subset_relation' ), 'identity_relation' ) ] )
% 0.73/1.35  , clause( 7411, [ =( complement( 'domain_of'( intersection( X, 
% 0.73/1.35    'identity_relation' ) ) ), diagonalise( X ) ) ] )
% 0.73/1.35  , clause( 7412, [ =( intersection( 'domain_of'( X ), diagonalise( compose( 
% 0.73/1.35    inverse( 'element_relation' ), X ) ) ), cantor( X ) ) ] )
% 0.73/1.35  , clause( 7413, [ ~( operation( X ) ), function( X ) ] )
% 0.73/1.35  , clause( 7414, [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 
% 0.73/1.35    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 0.73/1.35     ] )
% 0.73/1.35  , clause( 7415, [ ~( operation( X ) ), subclass( 'range_of'( X ), 
% 0.73/1.35    'domain_of'( 'domain_of'( X ) ) ) ] )
% 0.73/1.35  , clause( 7416, [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 
% 0.73/1.35    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 0.73/1.35     ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), 
% 0.73/1.35    operation( X ) ] )
% 0.73/1.35  , clause( 7417, [ ~( compatible( X, Y, Z ) ), function( X ) ] )
% 0.73/1.35  , clause( 7418, [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( 
% 0.73/1.35    Y ) ), 'domain_of'( X ) ) ] )
% 0.73/1.35  , clause( 7419, [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 
% 0.73/1.35    'domain_of'( 'domain_of'( Z ) ) ) ] )
% 0.73/1.35  , clause( 7420, [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) )
% 0.73/1.35    , 'domain_of'( X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 
% 0.73/1.35    'domain_of'( Z ) ) ) ), compatible( X, Y, Z ) ] )
% 0.73/1.35  , clause( 7421, [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ] )
% 0.73/1.35  , clause( 7422, [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ] )
% 0.73/1.35  , clause( 7423, [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ] )
% 0.73/1.35  , clause( 7424, [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( 
% 0.73/1.35    T, U ), 'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T )
% 0.73/1.35    , apply( X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ]
% 0.73/1.35     )
% 0.73/1.35  , clause( 7425, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 0.73/1.35    Z, X, Y ) ), member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 0.73/1.35    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 0.73/1.35    , Y ) ] )
% 0.73/1.35  , clause( 7426, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 0.73/1.35    Z, X, Y ) ), ~( =( apply( Y, 'ordered_pair'( apply( Z, 
% 0.73/1.35    'not_homomorphism1'( Z, X, Y ) ), apply( Z, 'not_homomorphism2'( Z, X, Y
% 0.73/1.35     ) ) ) ), apply( Z, apply( X, 'ordered_pair'( 'not_homomorphism1'( Z, X, 
% 0.73/1.35    Y ), 'not_homomorphism2'( Z, X, Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ]
% 0.73/1.35     )
% 0.73/1.35  , clause( 7427, [ member( x, 'universal_class' ) ] )
% 0.73/1.35  , clause( 7428, [ =( singleton( x ), 'null_class' ) ] )
% 0.73/1.35  ] ).
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  subsumption(
% 0.73/1.35  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 0.73/1.35  , clause( 7340, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 0.73/1.35  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.35     ), ==>( 1, 1 )] ) ).
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  subsumption(
% 0.73/1.35  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 0.73/1.35  , clause( 7342, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ]
% 0.73/1.35     )
% 0.73/1.35  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.35     ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  subsumption(
% 0.73/1.35  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.73/1.35    'unordered_pair'( Y, X ) ) ] )
% 0.73/1.35  , clause( 7345, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.73/1.35    'unordered_pair'( Y, X ) ) ] )
% 0.73/1.35  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.35     ), ==>( 1, 1 )] ) ).
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  subsumption(
% 0.73/1.35  clause( 10, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 0.73/1.35  , clause( 7347, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 0.73/1.35  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  subsumption(
% 0.73/1.35  clause( 19, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ] )
% 0.73/1.35  , clause( 7356, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 0.73/1.35     )
% 0.73/1.35  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.73/1.35    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] ) ).
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  subsumption(
% 0.73/1.35  clause( 22, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ] )
% 0.73/1.35  , clause( 7359, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 0.73/1.35     )
% 0.73/1.35  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.35     ), ==>( 1, 1 )] ) ).
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  subsumption(
% 0.73/1.35  clause( 65, [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 
% 0.73/1.35    'null_class' ) ] )
% 0.73/1.35  , clause( 7402, [ =( X, 'null_class' ), =( intersection( X, regular( X ) )
% 0.73/1.35    , 'null_class' ) ] )
% 0.73/1.35  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 
% 0.73/1.35    1 )] ) ).
% 0.73/1.35  
% 0.73/1.35  
% 0.73/1.35  subsumption(
% 0.73/1.35  clause( 90, [ member( x, 'universal_class' )Cputime limit exceeded (core dumped)
%------------------------------------------------------------------------------