TSTP Solution File: SET075-6 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : SET075-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n007.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 22:46:37 EDT 2022

% Result   : Unsatisfiable 0.76s 1.56s
% Output   : Refutation 0.76s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.12  % Problem  : SET075-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.03/0.13  % Command  : bliksem %s
% 0.14/0.34  % Computer : n007.cluster.edu
% 0.14/0.34  % Model    : x86_64 x86_64
% 0.14/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.34  % Memory   : 8042.1875MB
% 0.14/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.14/0.34  % CPULimit : 300
% 0.14/0.34  % DateTime : Sun Jul 10 15:04:32 EDT 2022
% 0.14/0.34  % CPUTime  : 
% 0.72/1.10  *** allocated 10000 integers for termspace/termends
% 0.72/1.10  *** allocated 10000 integers for clauses
% 0.72/1.10  *** allocated 10000 integers for justifications
% 0.72/1.10  Bliksem 1.12
% 0.72/1.10  
% 0.72/1.10  
% 0.72/1.10  Automatic Strategy Selection
% 0.72/1.10  
% 0.72/1.10  Clauses:
% 0.72/1.10  [
% 0.72/1.10     [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ],
% 0.72/1.10     [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y ) ],
% 0.72/1.10     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), subclass( X, Y ) ]
% 0.72/1.10    ,
% 0.72/1.10     [ subclass( X, 'universal_class' ) ],
% 0.72/1.10     [ ~( =( X, Y ) ), subclass( X, Y ) ],
% 0.72/1.10     [ ~( =( X, Y ) ), subclass( Y, X ) ],
% 0.72/1.10     [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ],
% 0.72/1.10     [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z ) ]
% 0.72/1.10    ,
% 0.72/1.10     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( X, Y
% 0.72/1.10     ) ) ],
% 0.72/1.10     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( Y, X
% 0.72/1.10     ) ) ],
% 0.72/1.10     [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ],
% 0.72/1.10     [ =( 'unordered_pair'( X, X ), singleton( X ) ) ],
% 0.72/1.10     [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, singleton( Y
% 0.72/1.10     ) ) ), 'ordered_pair'( X, Y ) ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.72/1.10    X, Z ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.72/1.10    Y, T ) ],
% 0.72/1.10     [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 'ordered_pair'( X, Z
% 0.72/1.10     ), 'cross_product'( Y, T ) ) ],
% 0.72/1.10     [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 'ordered_pair'( first( X
% 0.72/1.10     ), second( X ) ), X ) ],
% 0.72/1.10     [ subclass( 'element_relation', 'cross_product'( 'universal_class', 
% 0.72/1.10    'universal_class' ) ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) ), member( X, 
% 0.72/1.10    Y ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 'universal_class'
% 0.72/1.10    , 'universal_class' ) ) ), ~( member( X, Y ) ), member( 'ordered_pair'( X
% 0.72/1.10    , Y ), 'element_relation' ) ],
% 0.72/1.10     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ],
% 0.72/1.10     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ],
% 0.72/1.10     [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, intersection( Y, 
% 0.72/1.10    Z ) ) ],
% 0.72/1.10     [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ],
% 0.72/1.10     [ ~( member( X, 'universal_class' ) ), member( X, complement( Y ) ), 
% 0.72/1.10    member( X, Y ) ],
% 0.72/1.10     [ =( complement( intersection( complement( X ), complement( Y ) ) ), 
% 0.72/1.10    union( X, Y ) ) ],
% 0.72/1.10     [ =( intersection( complement( intersection( X, Y ) ), complement( 
% 0.72/1.10    intersection( complement( X ), complement( Y ) ) ) ), 
% 0.72/1.10    'symmetric_difference'( X, Y ) ) ],
% 0.72/1.10     [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( X, Y, Z ) ) ]
% 0.72/1.10    ,
% 0.72/1.10     [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( Z, X, Y ) ) ]
% 0.72/1.10    ,
% 0.72/1.10     [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 'null_class' )
% 0.72/1.10     ), ~( member( Y, 'domain_of'( X ) ) ) ],
% 0.72/1.10     [ ~( member( X, 'universal_class' ) ), =( restrict( Y, singleton( X ), 
% 0.72/1.10    'universal_class' ), 'null_class' ), member( X, 'domain_of'( Y ) ) ],
% 0.72/1.10     [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.72/1.10    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), rotate( T ) )
% 0.72/1.10     ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.72/1.10    member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 'cross_product'( 
% 0.72/1.10    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.72/1.10    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X ), 
% 0.72/1.10    Y ), rotate( T ) ) ],
% 0.72/1.10     [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.72/1.10    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), flip( T ) ) )
% 0.72/1.10    , member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.72/1.10    member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 'cross_product'( 
% 0.72/1.10    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.72/1.10    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), 
% 0.72/1.10    Z ), flip( T ) ) ],
% 0.72/1.10     [ =( 'domain_of'( flip( 'cross_product'( X, 'universal_class' ) ) ), 
% 0.72/1.10    inverse( X ) ) ],
% 0.72/1.10     [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ],
% 0.72/1.10     [ =( first( 'not_subclass_element'( restrict( X, Y, singleton( Z ) ), 
% 0.72/1.10    'null_class' ) ), domain( X, Y, Z ) ) ],
% 0.72/1.10     [ =( second( 'not_subclass_element'( restrict( X, singleton( Y ), Z ), 
% 0.72/1.10    'null_class' ) ), range( X, Y, Z ) ) ],
% 0.72/1.10     [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), image( X, Y ) )
% 0.72/1.10     ],
% 0.72/1.10     [ =( union( X, singleton( X ) ), successor( X ) ) ],
% 0.72/1.10     [ subclass( 'successor_relation', 'cross_product'( 'universal_class', 
% 0.72/1.10    'universal_class' ) ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' ) ), =( 
% 0.72/1.10    successor( X ), Y ) ],
% 0.72/1.10     [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X, Y ), 
% 0.72/1.10    'cross_product'( 'universal_class', 'universal_class' ) ) ), member( 
% 0.72/1.10    'ordered_pair'( X, Y ), 'successor_relation' ) ],
% 0.72/1.10     [ ~( inductive( X ) ), member( 'null_class', X ) ],
% 0.72/1.10     [ ~( inductive( X ) ), subclass( image( 'successor_relation', X ), X ) ]
% 0.72/1.10    ,
% 0.72/1.10     [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.72/1.10    'successor_relation', X ), X ) ), inductive( X ) ],
% 0.72/1.10     [ inductive( omega ) ],
% 0.72/1.10     [ ~( inductive( X ) ), subclass( omega, X ) ],
% 0.72/1.10     [ member( omega, 'universal_class' ) ],
% 0.72/1.10     [ =( 'domain_of'( restrict( 'element_relation', 'universal_class', X ) )
% 0.72/1.10    , 'sum_class'( X ) ) ],
% 0.72/1.10     [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( X ), 
% 0.72/1.10    'universal_class' ) ],
% 0.72/1.10     [ =( complement( image( 'element_relation', complement( X ) ) ), 
% 0.72/1.10    'power_class'( X ) ) ],
% 0.72/1.10     [ ~( member( X, 'universal_class' ) ), member( 'power_class'( X ), 
% 0.72/1.10    'universal_class' ) ],
% 0.72/1.10     [ subclass( compose( X, Y ), 'cross_product'( 'universal_class', 
% 0.72/1.10    'universal_class' ) ) ],
% 0.72/1.10     [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), member( Y, 
% 0.72/1.10    image( Z, image( T, singleton( X ) ) ) ) ],
% 0.72/1.10     [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) ), ~( member( 
% 0.72/1.10    'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.72/1.10    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.72/1.10     ) ],
% 0.72/1.10     [ ~( 'single_valued_class'( X ) ), subclass( compose( X, inverse( X ) )
% 0.72/1.10    , 'identity_relation' ) ],
% 0.72/1.10     [ ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) ), 
% 0.72/1.10    'single_valued_class'( X ) ],
% 0.72/1.10     [ ~( function( X ) ), subclass( X, 'cross_product'( 'universal_class', 
% 0.72/1.10    'universal_class' ) ) ],
% 0.72/1.10     [ ~( function( X ) ), subclass( compose( X, inverse( X ) ), 
% 0.72/1.10    'identity_relation' ) ],
% 0.72/1.10     [ ~( subclass( X, 'cross_product'( 'universal_class', 'universal_class'
% 0.72/1.10     ) ) ), ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) )
% 0.72/1.10    , function( X ) ],
% 0.72/1.10     [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), member( image( 
% 0.72/1.10    X, Y ), 'universal_class' ) ],
% 0.72/1.10     [ =( X, 'null_class' ), member( regular( X ), X ) ],
% 0.72/1.10     [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 'null_class'
% 0.72/1.10     ) ],
% 0.72/1.10     [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y ) ) ],
% 0.72/1.10     [ function( choice ) ],
% 0.72/1.10     [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' ), member( 
% 0.72/1.10    apply( choice, X ), X ) ],
% 0.72/1.10     [ ~( 'one_to_one'( X ) ), function( X ) ],
% 0.72/1.10     [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ],
% 0.72/1.10     [ ~( function( inverse( X ) ) ), ~( function( X ) ), 'one_to_one'( X ) ]
% 0.72/1.10    ,
% 0.72/1.10     [ =( intersection( 'cross_product'( 'universal_class', 'universal_class'
% 0.72/1.10     ), intersection( 'cross_product'( 'universal_class', 'universal_class' )
% 0.72/1.10    , complement( compose( complement( 'element_relation' ), inverse( 
% 0.72/1.10    'element_relation' ) ) ) ) ), 'subset_relation' ) ],
% 0.72/1.10     [ =( intersection( inverse( 'subset_relation' ), 'subset_relation' ), 
% 0.72/1.10    'identity_relation' ) ],
% 0.72/1.10     [ =( complement( 'domain_of'( intersection( X, 'identity_relation' ) ) )
% 0.72/1.10    , diagonalise( X ) ) ],
% 0.72/1.10     [ =( intersection( 'domain_of'( X ), diagonalise( compose( inverse( 
% 0.72/1.10    'element_relation' ), X ) ) ), cantor( X ) ) ],
% 0.72/1.10     [ ~( operation( X ) ), function( X ) ],
% 0.72/1.10     [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 'domain_of'( X )
% 0.72/1.10     ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ],
% 0.72/1.10     [ ~( operation( X ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.76/1.56    'domain_of'( X ) ) ) ],
% 0.76/1.56     [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 'domain_of'( X
% 0.76/1.56     ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ), ~( 
% 0.76/1.56    subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), operation( 
% 0.76/1.56    X ) ],
% 0.76/1.56     [ ~( compatible( X, Y, Z ) ), function( X ) ],
% 0.76/1.56     [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( Y ) ), 
% 0.76/1.56    'domain_of'( X ) ) ],
% 0.76/1.56     [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.76/1.56    'domain_of'( Z ) ) ) ],
% 0.76/1.56     [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) ), 'domain_of'( 
% 0.76/1.56    X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( Z ) ) )
% 0.76/1.56     ), compatible( X, Y, Z ) ],
% 0.76/1.56     [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ],
% 0.76/1.56     [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ],
% 0.76/1.56     [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ],
% 0.76/1.56     [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( T, U ), 
% 0.76/1.56    'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T ), apply( 
% 0.76/1.56    X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ],
% 0.76/1.56     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.76/1.56    member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 0.76/1.56    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 0.76/1.56    , Y ) ],
% 0.76/1.56     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.76/1.56    ~( =( apply( Y, 'ordered_pair'( apply( Z, 'not_homomorphism1'( Z, X, Y )
% 0.76/1.56     ), apply( Z, 'not_homomorphism2'( Z, X, Y ) ) ) ), apply( Z, apply( X, 
% 0.76/1.56    'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 'not_homomorphism2'( Z, X
% 0.76/1.56    , Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ],
% 0.76/1.56     [ member( 'ordered_pair'( x, y ), 'cross_product'( u, v ) ) ],
% 0.76/1.56     [ =( 'unordered_pair'( x, y ), 'null_class' ) ]
% 0.76/1.56  ] .
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  percentage equality = 0.218579, percentage horn = 0.913978
% 0.76/1.56  This is a problem with some equality
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  Options Used:
% 0.76/1.56  
% 0.76/1.56  useres =            1
% 0.76/1.56  useparamod =        1
% 0.76/1.56  useeqrefl =         1
% 0.76/1.56  useeqfact =         1
% 0.76/1.56  usefactor =         1
% 0.76/1.56  usesimpsplitting =  0
% 0.76/1.56  usesimpdemod =      5
% 0.76/1.56  usesimpres =        3
% 0.76/1.56  
% 0.76/1.56  resimpinuse      =  1000
% 0.76/1.56  resimpclauses =     20000
% 0.76/1.56  substype =          eqrewr
% 0.76/1.56  backwardsubs =      1
% 0.76/1.56  selectoldest =      5
% 0.76/1.56  
% 0.76/1.56  litorderings [0] =  split
% 0.76/1.56  litorderings [1] =  extend the termordering, first sorting on arguments
% 0.76/1.56  
% 0.76/1.56  termordering =      kbo
% 0.76/1.56  
% 0.76/1.56  litapriori =        0
% 0.76/1.56  termapriori =       1
% 0.76/1.56  litaposteriori =    0
% 0.76/1.56  termaposteriori =   0
% 0.76/1.56  demodaposteriori =  0
% 0.76/1.56  ordereqreflfact =   0
% 0.76/1.56  
% 0.76/1.56  litselect =         negord
% 0.76/1.56  
% 0.76/1.56  maxweight =         15
% 0.76/1.56  maxdepth =          30000
% 0.76/1.56  maxlength =         115
% 0.76/1.56  maxnrvars =         195
% 0.76/1.56  excuselevel =       1
% 0.76/1.56  increasemaxweight = 1
% 0.76/1.56  
% 0.76/1.56  maxselected =       10000000
% 0.76/1.56  maxnrclauses =      10000000
% 0.76/1.56  
% 0.76/1.56  showgenerated =    0
% 0.76/1.56  showkept =         0
% 0.76/1.56  showselected =     0
% 0.76/1.56  showdeleted =      0
% 0.76/1.56  showresimp =       1
% 0.76/1.56  showstatus =       2000
% 0.76/1.56  
% 0.76/1.56  prologoutput =     1
% 0.76/1.56  nrgoals =          5000000
% 0.76/1.56  totalproof =       1
% 0.76/1.56  
% 0.76/1.56  Symbols occurring in the translation:
% 0.76/1.56  
% 0.76/1.56  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 0.76/1.56  .  [1, 2]      (w:1, o:58, a:1, s:1, b:0), 
% 0.76/1.56  !  [4, 1]      (w:0, o:33, a:1, s:1, b:0), 
% 0.76/1.56  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.76/1.56  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.76/1.56  subclass  [41, 2]      (w:1, o:83, a:1, s:1, b:0), 
% 0.76/1.56  member  [43, 2]      (w:1, o:84, a:1, s:1, b:0), 
% 0.76/1.56  'not_subclass_element'  [44, 2]      (w:1, o:85, a:1, s:1, b:0), 
% 0.76/1.56  'universal_class'  [45, 0]      (w:1, o:21, a:1, s:1, b:0), 
% 0.76/1.56  'unordered_pair'  [46, 2]      (w:1, o:86, a:1, s:1, b:0), 
% 0.76/1.56  singleton  [47, 1]      (w:1, o:41, a:1, s:1, b:0), 
% 0.76/1.56  'ordered_pair'  [48, 2]      (w:1, o:87, a:1, s:1, b:0), 
% 0.76/1.56  'cross_product'  [50, 2]      (w:1, o:88, a:1, s:1, b:0), 
% 0.76/1.56  first  [52, 1]      (w:1, o:42, a:1, s:1, b:0), 
% 0.76/1.56  second  [53, 1]      (w:1, o:43, a:1, s:1, b:0), 
% 0.76/1.56  'element_relation'  [54, 0]      (w:1, o:25, a:1, s:1, b:0), 
% 0.76/1.56  intersection  [55, 2]      (w:1, o:90, a:1, s:1, b:0), 
% 0.76/1.56  complement  [56, 1]      (w:1, o:44, a:1, s:1, b:0), 
% 0.76/1.56  union  [57, 2]      (w:1, o:91, a:1, s:1, b:0), 
% 0.76/1.56  'symmetric_difference'  [58, 2]      (w:1, o:92, a:1, s:1, b:0), 
% 0.76/1.56  restrict  [60, 3]      (w:1, o:95, a:1, s:1, b:0), 
% 0.76/1.56  'null_class'  [61, 0]      (w:1, o:26, a:1, s:1, b:0), 
% 0.76/1.56  'domain_of'  [62, 1]      (w:1, o:46, a:1, s:1, b:0), 
% 0.76/1.56  rotate  [63, 1]      (w:1, o:38, a:1, s:1, b:0), 
% 0.76/1.56  flip  [65, 1]      (w:1, o:47, a:1, s:1, b:0), 
% 0.76/1.56  inverse  [66, 1]      (w:1, o:48, a:1, s:1, b:0), 
% 0.76/1.56  'range_of'  [67, 1]      (w:1, o:39, a:1, s:1, b:0), 
% 0.76/1.56  domain  [68, 3]      (w:1, o:97, a:1, s:1, b:0), 
% 0.76/1.56  range  [69, 3]      (w:1, o:98, a:1, s:1, b:0), 
% 0.76/1.56  image  [70, 2]      (w:1, o:89, a:1, s:1, b:0), 
% 0.76/1.56  successor  [71, 1]      (w:1, o:49, a:1, s:1, b:0), 
% 0.76/1.56  'successor_relation'  [72, 0]      (w:1, o:6, a:1, s:1, b:0), 
% 0.76/1.56  inductive  [73, 1]      (w:1, o:50, a:1, s:1, b:0), 
% 0.76/1.56  omega  [74, 0]      (w:1, o:9, a:1, s:1, b:0), 
% 0.76/1.56  'sum_class'  [75, 1]      (w:1, o:51, a:1, s:1, b:0), 
% 0.76/1.56  'power_class'  [76, 1]      (w:1, o:54, a:1, s:1, b:0), 
% 0.76/1.56  compose  [78, 2]      (w:1, o:93, a:1, s:1, b:0), 
% 0.76/1.56  'single_valued_class'  [79, 1]      (w:1, o:55, a:1, s:1, b:0), 
% 0.76/1.56  'identity_relation'  [80, 0]      (w:1, o:27, a:1, s:1, b:0), 
% 0.76/1.56  function  [82, 1]      (w:1, o:56, a:1, s:1, b:0), 
% 0.76/1.56  regular  [83, 1]      (w:1, o:40, a:1, s:1, b:0), 
% 0.76/1.56  apply  [84, 2]      (w:1, o:94, a:1, s:1, b:0), 
% 0.76/1.56  choice  [85, 0]      (w:1, o:28, a:1, s:1, b:0), 
% 0.76/1.56  'one_to_one'  [86, 1]      (w:1, o:52, a:1, s:1, b:0), 
% 0.76/1.56  'subset_relation'  [87, 0]      (w:1, o:5, a:1, s:1, b:0), 
% 0.76/1.56  diagonalise  [88, 1]      (w:1, o:57, a:1, s:1, b:0), 
% 0.76/1.56  cantor  [89, 1]      (w:1, o:45, a:1, s:1, b:0), 
% 0.76/1.56  operation  [90, 1]      (w:1, o:53, a:1, s:1, b:0), 
% 0.76/1.56  compatible  [94, 3]      (w:1, o:96, a:1, s:1, b:0), 
% 0.76/1.56  homomorphism  [95, 3]      (w:1, o:99, a:1, s:1, b:0), 
% 0.76/1.56  'not_homomorphism1'  [96, 3]      (w:1, o:100, a:1, s:1, b:0), 
% 0.76/1.56  'not_homomorphism2'  [97, 3]      (w:1, o:101, a:1, s:1, b:0), 
% 0.76/1.56  x  [98, 0]      (w:1, o:29, a:1, s:1, b:0), 
% 0.76/1.56  y  [99, 0]      (w:1, o:30, a:1, s:1, b:0), 
% 0.76/1.56  u  [100, 0]      (w:1, o:31, a:1, s:1, b:0), 
% 0.76/1.56  v  [101, 0]      (w:1, o:32, a:1, s:1, b:0).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  Starting Search:
% 0.76/1.56  
% 0.76/1.56  Resimplifying inuse:
% 0.76/1.56  Done
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  Intermediate Status:
% 0.76/1.56  Generated:    5705
% 0.76/1.56  Kept:         2020
% 0.76/1.56  Inuse:        110
% 0.76/1.56  Deleted:      4
% 0.76/1.56  Deletedinuse: 3
% 0.76/1.56  
% 0.76/1.56  Resimplifying inuse:
% 0.76/1.56  Done
% 0.76/1.56  
% 0.76/1.56  Resimplifying inuse:
% 0.76/1.56  Done
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  Intermediate Status:
% 0.76/1.56  Generated:    10380
% 0.76/1.56  Kept:         4023
% 0.76/1.56  Inuse:        187
% 0.76/1.56  Deleted:      23
% 0.76/1.56  Deletedinuse: 16
% 0.76/1.56  
% 0.76/1.56  Resimplifying inuse:
% 0.76/1.56  Done
% 0.76/1.56  
% 0.76/1.56  Resimplifying inuse:
% 0.76/1.56  Done
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  Intermediate Status:
% 0.76/1.56  Generated:    14238
% 0.76/1.56  Kept:         6049
% 0.76/1.56  Inuse:        237
% 0.76/1.56  Deleted:      25
% 0.76/1.56  Deletedinuse: 16
% 0.76/1.56  
% 0.76/1.56  Resimplifying inuse:
% 0.76/1.56  Done
% 0.76/1.56  
% 0.76/1.56  Resimplifying inuse:
% 0.76/1.56  Done
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  Intermediate Status:
% 0.76/1.56  Generated:    19060
% 0.76/1.56  Kept:         8114
% 0.76/1.56  Inuse:        290
% 0.76/1.56  Deleted:      86
% 0.76/1.56  Deletedinuse: 75
% 0.76/1.56  
% 0.76/1.56  Resimplifying inuse:
% 0.76/1.56  Done
% 0.76/1.56  
% 0.76/1.56  Resimplifying inuse:
% 0.76/1.56  Done
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  Bliksems!, er is een bewijs:
% 0.76/1.56  % SZS status Unsatisfiable
% 0.76/1.56  % SZS output start Refutation
% 0.76/1.56  
% 0.76/1.56  clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 0.76/1.56     )
% 0.76/1.56  .
% 0.76/1.56  clause( 3, [ subclass( X, 'universal_class' ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.76/1.56    'unordered_pair'( Y, X ) ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 13, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) )
% 0.76/1.56     ), member( Y, T ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 19, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 22, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 64, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 90, [ member( 'ordered_pair'( x, y ), 'cross_product'( u, v ) ) ]
% 0.76/1.56     )
% 0.76/1.56  .
% 0.76/1.56  clause( 91, [ =( 'unordered_pair'( x, y ), 'null_class' ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 106, [ ~( member( X, Y ) ), member( X, 'universal_class' ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 463, [ ~( member( y, 'universal_class' ) ), member( y, 'null_class'
% 0.76/1.56     ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 960, [ member( y, 'null_class' ), ~( member( y, X ) ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 1803, [ ~( member( X, complement( 'universal_class' ) ) ), ~( 
% 0.76/1.56    member( X, Y ) ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 1826, [ ~( member( X, complement( 'universal_class' ) ) ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 1837, [ ~( member( X, intersection( complement( 'universal_class' )
% 0.76/1.56    , Y ) ) ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 6927, [ =( intersection( complement( 'universal_class' ), X ), 
% 0.76/1.56    'null_class' ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 7493, [ ~( member( X, 'null_class' ) ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 7515, [ ~( member( y, X ) ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 7789, [ ~( member( 'ordered_pair'( X, y ), 'cross_product'( Y, Z )
% 0.76/1.56     ) ) ] )
% 0.76/1.56  .
% 0.76/1.56  clause( 9974, [] )
% 0.76/1.56  .
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  % SZS output end Refutation
% 0.76/1.56  found a proof!
% 0.76/1.56  
% 0.76/1.56  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.76/1.56  
% 0.76/1.56  initialclauses(
% 0.76/1.56  [ clause( 9976, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 0.76/1.56     ) ] )
% 0.76/1.56  , clause( 9977, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 0.76/1.56    , Y ) ] )
% 0.76/1.56  , clause( 9978, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), 
% 0.76/1.56    subclass( X, Y ) ] )
% 0.76/1.56  , clause( 9979, [ subclass( X, 'universal_class' ) ] )
% 0.76/1.56  , clause( 9980, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 0.76/1.56  , clause( 9981, [ ~( =( X, Y ) ), subclass( Y, X ) ] )
% 0.76/1.56  , clause( 9982, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 9983, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), 
% 0.76/1.56    =( X, Z ) ] )
% 0.76/1.56  , clause( 9984, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.76/1.56    'unordered_pair'( X, Y ) ) ] )
% 0.76/1.56  , clause( 9985, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.76/1.56    'unordered_pair'( Y, X ) ) ] )
% 0.76/1.56  , clause( 9986, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 9987, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 0.76/1.56  , clause( 9988, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 0.76/1.56    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 0.76/1.56  , clause( 9989, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 0.76/1.56     ) ) ), member( X, Z ) ] )
% 0.76/1.56  , clause( 9990, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 0.76/1.56     ) ) ), member( Y, T ) ] )
% 0.76/1.56  , clause( 9991, [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 
% 0.76/1.56    'ordered_pair'( X, Z ), 'cross_product'( Y, T ) ) ] )
% 0.76/1.56  , clause( 9992, [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 
% 0.76/1.56    'ordered_pair'( first( X ), second( X ) ), X ) ] )
% 0.76/1.56  , clause( 9993, [ subclass( 'element_relation', 'cross_product'( 
% 0.76/1.56    'universal_class', 'universal_class' ) ) ] )
% 0.76/1.56  , clause( 9994, [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) )
% 0.76/1.56    , member( X, Y ) ] )
% 0.76/1.56  , clause( 9995, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 
% 0.76/1.56    'universal_class', 'universal_class' ) ) ), ~( member( X, Y ) ), member( 
% 0.76/1.56    'ordered_pair'( X, Y ), 'element_relation' ) ] )
% 0.76/1.56  , clause( 9996, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 9997, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 9998, [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, 
% 0.76/1.56    intersection( Y, Z ) ) ] )
% 0.76/1.56  , clause( 9999, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 10000, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.76/1.56    complement( Y ) ), member( X, Y ) ] )
% 0.76/1.56  , clause( 10001, [ =( complement( intersection( complement( X ), complement( 
% 0.76/1.56    Y ) ) ), union( X, Y ) ) ] )
% 0.76/1.56  , clause( 10002, [ =( intersection( complement( intersection( X, Y ) ), 
% 0.76/1.56    complement( intersection( complement( X ), complement( Y ) ) ) ), 
% 0.76/1.56    'symmetric_difference'( X, Y ) ) ] )
% 0.76/1.56  , clause( 10003, [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( 
% 0.76/1.56    X, Y, Z ) ) ] )
% 0.76/1.56  , clause( 10004, [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( 
% 0.76/1.56    Z, X, Y ) ) ] )
% 0.76/1.56  , clause( 10005, [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 
% 0.76/1.56    'null_class' ) ), ~( member( Y, 'domain_of'( X ) ) ) ] )
% 0.76/1.56  , clause( 10006, [ ~( member( X, 'universal_class' ) ), =( restrict( Y, 
% 0.76/1.56    singleton( X ), 'universal_class' ), 'null_class' ), member( X, 
% 0.76/1.56    'domain_of'( Y ) ) ] )
% 0.76/1.56  , clause( 10007, [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.76/1.56    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 0.76/1.56  , clause( 10008, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 0.76/1.56    rotate( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T )
% 0.76/1.56     ] )
% 0.76/1.56  , clause( 10009, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 0.76/1.56    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 
% 0.76/1.56    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 0.76/1.56    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X )
% 0.76/1.56    , Y ), rotate( T ) ) ] )
% 0.76/1.56  , clause( 10010, [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.76/1.56    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 0.76/1.56  , clause( 10011, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 0.76/1.56    flip( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 10012, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 0.76/1.56    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 
% 0.76/1.56    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 0.76/1.56    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X )
% 0.76/1.56    , Z ), flip( T ) ) ] )
% 0.76/1.56  , clause( 10013, [ =( 'domain_of'( flip( 'cross_product'( X, 
% 0.76/1.56    'universal_class' ) ) ), inverse( X ) ) ] )
% 0.76/1.56  , clause( 10014, [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ] )
% 0.76/1.56  , clause( 10015, [ =( first( 'not_subclass_element'( restrict( X, Y, 
% 0.76/1.56    singleton( Z ) ), 'null_class' ) ), domain( X, Y, Z ) ) ] )
% 0.76/1.56  , clause( 10016, [ =( second( 'not_subclass_element'( restrict( X, 
% 0.76/1.56    singleton( Y ), Z ), 'null_class' ) ), range( X, Y, Z ) ) ] )
% 0.76/1.56  , clause( 10017, [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), 
% 0.76/1.56    image( X, Y ) ) ] )
% 0.76/1.56  , clause( 10018, [ =( union( X, singleton( X ) ), successor( X ) ) ] )
% 0.76/1.56  , clause( 10019, [ subclass( 'successor_relation', 'cross_product'( 
% 0.76/1.56    'universal_class', 'universal_class' ) ) ] )
% 0.76/1.56  , clause( 10020, [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation'
% 0.76/1.56     ) ), =( successor( X ), Y ) ] )
% 0.76/1.56  , clause( 10021, [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( 
% 0.76/1.56    X, Y ), 'cross_product'( 'universal_class', 'universal_class' ) ) ), 
% 0.76/1.56    member( 'ordered_pair'( X, Y ), 'successor_relation' ) ] )
% 0.76/1.56  , clause( 10022, [ ~( inductive( X ) ), member( 'null_class', X ) ] )
% 0.76/1.56  , clause( 10023, [ ~( inductive( X ) ), subclass( image( 
% 0.76/1.56    'successor_relation', X ), X ) ] )
% 0.76/1.56  , clause( 10024, [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.76/1.56    'successor_relation', X ), X ) ), inductive( X ) ] )
% 0.76/1.56  , clause( 10025, [ inductive( omega ) ] )
% 0.76/1.56  , clause( 10026, [ ~( inductive( X ) ), subclass( omega, X ) ] )
% 0.76/1.56  , clause( 10027, [ member( omega, 'universal_class' ) ] )
% 0.76/1.56  , clause( 10028, [ =( 'domain_of'( restrict( 'element_relation', 
% 0.76/1.56    'universal_class', X ) ), 'sum_class'( X ) ) ] )
% 0.76/1.56  , clause( 10029, [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( 
% 0.76/1.56    X ), 'universal_class' ) ] )
% 0.76/1.56  , clause( 10030, [ =( complement( image( 'element_relation', complement( X
% 0.76/1.56     ) ) ), 'power_class'( X ) ) ] )
% 0.76/1.56  , clause( 10031, [ ~( member( X, 'universal_class' ) ), member( 
% 0.76/1.56    'power_class'( X ), 'universal_class' ) ] )
% 0.76/1.56  , clause( 10032, [ subclass( compose( X, Y ), 'cross_product'( 
% 0.76/1.56    'universal_class', 'universal_class' ) ) ] )
% 0.76/1.56  , clause( 10033, [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), 
% 0.76/1.56    member( Y, image( Z, image( T, singleton( X ) ) ) ) ] )
% 0.76/1.56  , clause( 10034, [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) )
% 0.76/1.56    , ~( member( 'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.76/1.56    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.76/1.56     ) ] )
% 0.76/1.56  , clause( 10035, [ ~( 'single_valued_class'( X ) ), subclass( compose( X, 
% 0.76/1.56    inverse( X ) ), 'identity_relation' ) ] )
% 0.76/1.56  , clause( 10036, [ ~( subclass( compose( X, inverse( X ) ), 
% 0.76/1.56    'identity_relation' ) ), 'single_valued_class'( X ) ] )
% 0.76/1.56  , clause( 10037, [ ~( function( X ) ), subclass( X, 'cross_product'( 
% 0.76/1.56    'universal_class', 'universal_class' ) ) ] )
% 0.76/1.56  , clause( 10038, [ ~( function( X ) ), subclass( compose( X, inverse( X ) )
% 0.76/1.56    , 'identity_relation' ) ] )
% 0.76/1.56  , clause( 10039, [ ~( subclass( X, 'cross_product'( 'universal_class', 
% 0.76/1.56    'universal_class' ) ) ), ~( subclass( compose( X, inverse( X ) ), 
% 0.76/1.56    'identity_relation' ) ), function( X ) ] )
% 0.76/1.56  , clause( 10040, [ ~( function( X ) ), ~( member( Y, 'universal_class' ) )
% 0.76/1.56    , member( image( X, Y ), 'universal_class' ) ] )
% 0.76/1.56  , clause( 10041, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 0.76/1.56  , clause( 10042, [ =( X, 'null_class' ), =( intersection( X, regular( X ) )
% 0.76/1.56    , 'null_class' ) ] )
% 0.76/1.56  , clause( 10043, [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, 
% 0.76/1.56    Y ) ) ] )
% 0.76/1.56  , clause( 10044, [ function( choice ) ] )
% 0.76/1.56  , clause( 10045, [ ~( member( X, 'universal_class' ) ), =( X, 'null_class'
% 0.76/1.56     ), member( apply( choice, X ), X ) ] )
% 0.76/1.56  , clause( 10046, [ ~( 'one_to_one'( X ) ), function( X ) ] )
% 0.76/1.56  , clause( 10047, [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ] )
% 0.76/1.56  , clause( 10048, [ ~( function( inverse( X ) ) ), ~( function( X ) ), 
% 0.76/1.56    'one_to_one'( X ) ] )
% 0.76/1.56  , clause( 10049, [ =( intersection( 'cross_product'( 'universal_class', 
% 0.76/1.56    'universal_class' ), intersection( 'cross_product'( 'universal_class', 
% 0.76/1.56    'universal_class' ), complement( compose( complement( 'element_relation'
% 0.76/1.56     ), inverse( 'element_relation' ) ) ) ) ), 'subset_relation' ) ] )
% 0.76/1.56  , clause( 10050, [ =( intersection( inverse( 'subset_relation' ), 
% 0.76/1.56    'subset_relation' ), 'identity_relation' ) ] )
% 0.76/1.56  , clause( 10051, [ =( complement( 'domain_of'( intersection( X, 
% 0.76/1.56    'identity_relation' ) ) ), diagonalise( X ) ) ] )
% 0.76/1.56  , clause( 10052, [ =( intersection( 'domain_of'( X ), diagonalise( compose( 
% 0.76/1.56    inverse( 'element_relation' ), X ) ) ), cantor( X ) ) ] )
% 0.76/1.56  , clause( 10053, [ ~( operation( X ) ), function( X ) ] )
% 0.76/1.56  , clause( 10054, [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 
% 0.76/1.56    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 0.76/1.56     ] )
% 0.76/1.56  , clause( 10055, [ ~( operation( X ) ), subclass( 'range_of'( X ), 
% 0.76/1.56    'domain_of'( 'domain_of'( X ) ) ) ] )
% 0.76/1.56  , clause( 10056, [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 
% 0.76/1.56    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 0.76/1.56     ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), 
% 0.76/1.56    operation( X ) ] )
% 0.76/1.56  , clause( 10057, [ ~( compatible( X, Y, Z ) ), function( X ) ] )
% 0.76/1.56  , clause( 10058, [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( 
% 0.76/1.56    Y ) ), 'domain_of'( X ) ) ] )
% 0.76/1.56  , clause( 10059, [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 
% 0.76/1.56    'domain_of'( 'domain_of'( Z ) ) ) ] )
% 0.76/1.56  , clause( 10060, [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y )
% 0.76/1.56     ), 'domain_of'( X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 
% 0.76/1.56    'domain_of'( Z ) ) ) ), compatible( X, Y, Z ) ] )
% 0.76/1.56  , clause( 10061, [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ] )
% 0.76/1.56  , clause( 10062, [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ] )
% 0.76/1.56  , clause( 10063, [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ] )
% 0.76/1.56  , clause( 10064, [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( 
% 0.76/1.56    T, U ), 'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T )
% 0.76/1.56    , apply( X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 10065, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 0.76/1.56    Z, X, Y ) ), member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 0.76/1.56    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 0.76/1.56    , Y ) ] )
% 0.76/1.56  , clause( 10066, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 0.76/1.56    Z, X, Y ) ), ~( =( apply( Y, 'ordered_pair'( apply( Z, 
% 0.76/1.56    'not_homomorphism1'( Z, X, Y ) ), apply( Z, 'not_homomorphism2'( Z, X, Y
% 0.76/1.56     ) ) ) ), apply( Z, apply( X, 'ordered_pair'( 'not_homomorphism1'( Z, X, 
% 0.76/1.56    Y ), 'not_homomorphism2'( Z, X, Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 10067, [ member( 'ordered_pair'( x, y ), 'cross_product'( u, v )
% 0.76/1.56     ) ] )
% 0.76/1.56  , clause( 10068, [ =( 'unordered_pair'( x, y ), 'null_class' ) ] )
% 0.76/1.56  ] ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 9976, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 0.76/1.56     ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.76/1.56    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 3, [ subclass( X, 'universal_class' ) ] )
% 0.76/1.56  , clause( 9979, [ subclass( X, 'universal_class' ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.76/1.56    'unordered_pair'( Y, X ) ) ] )
% 0.76/1.56  , clause( 9985, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.76/1.56    'unordered_pair'( Y, X ) ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.76/1.56     ), ==>( 1, 1 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 13, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) )
% 0.76/1.56     ), member( Y, T ) ] )
% 0.76/1.56  , clause( 9990, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 0.76/1.56     ) ) ), member( Y, T ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.76/1.56    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 19, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ] )
% 0.76/1.56  , clause( 9996, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 0.76/1.56     )
% 0.76/1.56  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.76/1.56    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 22, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ] )
% 0.76/1.56  , clause( 9999, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 0.76/1.56     )
% 0.76/1.56  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.76/1.56     ), ==>( 1, 1 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 64, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 0.76/1.56  , clause( 10041, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 
% 0.76/1.56    1 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 90, [ member( 'ordered_pair'( x, y ), 'cross_product'( u, v ) ) ]
% 0.76/1.56     )
% 0.76/1.56  , clause( 10067, [ member( 'ordered_pair'( x, y ), 'cross_product'( u, v )
% 0.76/1.56     ) ] )
% 0.76/1.56  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 91, [ =( 'unordered_pair'( x, y ), 'null_class' ) ] )
% 0.76/1.56  , clause( 10068, [ =( 'unordered_pair'( x, y ), 'null_class' ) ] )
% 0.76/1.56  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  resolution(
% 0.76/1.56  clause( 10245, [ ~( member( Y, X ) ), member( Y, 'universal_class' ) ] )
% 0.76/1.56  , clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 0.76/1.56     )
% 0.76/1.56  , 0, clause( 3, [ subclass( X, 'universal_class' ) ] )
% 0.76/1.56  , 0, substitution( 0, [ :=( X, X ), :=( Y, 'universal_class' ), :=( Z, Y )] )
% 0.76/1.56    , substitution( 1, [ :=( X, X )] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 106, [ ~( member( X, Y ) ), member( X, 'universal_class' ) ] )
% 0.76/1.56  , clause( 10245, [ ~( member( Y, X ) ), member( Y, 'universal_class' ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, Y ), :=( Y, X )] ), permutation( 0, [ ==>( 0, 0
% 0.76/1.56     ), ==>( 1, 1 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  paramod(
% 0.76/1.56  clause( 10247, [ member( y, 'null_class' ), ~( member( y, 'universal_class'
% 0.76/1.56     ) ) ] )
% 0.76/1.56  , clause( 91, [ =( 'unordered_pair'( x, y ), 'null_class' ) ] )
% 0.76/1.56  , 0, clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 0.76/1.56    'unordered_pair'( Y, X ) ) ] )
% 0.76/1.56  , 1, 2, substitution( 0, [] ), substitution( 1, [ :=( X, y ), :=( Y, x )] )
% 0.76/1.56    ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 463, [ ~( member( y, 'universal_class' ) ), member( y, 'null_class'
% 0.76/1.56     ) ] )
% 0.76/1.56  , clause( 10247, [ member( y, 'null_class' ), ~( member( y, 
% 0.76/1.56    'universal_class' ) ) ] )
% 0.76/1.56  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] )
% 0.76/1.56     ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  resolution(
% 0.76/1.56  clause( 10248, [ member( y, 'null_class' ), ~( member( y, X ) ) ] )
% 0.76/1.56  , clause( 463, [ ~( member( y, 'universal_class' ) ), member( y, 
% 0.76/1.56    'null_class' ) ] )
% 0.76/1.56  , 0, clause( 106, [ ~( member( X, Y ) ), member( X, 'universal_class' ) ]
% 0.76/1.56     )
% 0.76/1.56  , 1, substitution( 0, [] ), substitution( 1, [ :=( X, y ), :=( Y, X )] )
% 0.76/1.56    ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 960, [ member( y, 'null_class' ), ~( member( y, X ) ) ] )
% 0.76/1.56  , clause( 10248, [ member( y, 'null_class' ), ~( member( y, X ) ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 
% 0.76/1.56    1 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  resolution(
% 0.76/1.56  clause( 10249, [ ~( member( X, complement( 'universal_class' ) ) ), ~( 
% 0.76/1.56    member( X, Y ) ) ] )
% 0.76/1.56  , clause( 22, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ] )
% 0.76/1.56  , 1, clause( 106, [ ~( member( X, Y ) ), member( X, 'universal_class' ) ]
% 0.76/1.56     )
% 0.76/1.56  , 1, substitution( 0, [ :=( X, X ), :=( Y, 'universal_class' )] ), 
% 0.76/1.56    substitution( 1, [ :=( X, X ), :=( Y, Y )] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 1803, [ ~( member( X, complement( 'universal_class' ) ) ), ~( 
% 0.76/1.56    member( X, Y ) ) ] )
% 0.76/1.56  , clause( 10249, [ ~( member( X, complement( 'universal_class' ) ) ), ~( 
% 0.76/1.56    member( X, Y ) ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X ), :=( Y, complement( 'universal_class' ) )] )
% 0.76/1.56    , permutation( 0, [ ==>( 0, 0 ), ==>( 1, 0 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  factor(
% 0.76/1.56  clause( 10251, [ ~( member( X, complement( 'universal_class' ) ) ) ] )
% 0.76/1.56  , clause( 1803, [ ~( member( X, complement( 'universal_class' ) ) ), ~( 
% 0.76/1.56    member( X, Y ) ) ] )
% 0.76/1.56  , 0, 1, substitution( 0, [ :=( X, X ), :=( Y, complement( 'universal_class'
% 0.76/1.56     ) )] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 1826, [ ~( member( X, complement( 'universal_class' ) ) ) ] )
% 0.76/1.56  , clause( 10251, [ ~( member( X, complement( 'universal_class' ) ) ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  resolution(
% 0.76/1.56  clause( 10252, [ ~( member( X, intersection( complement( 'universal_class'
% 0.76/1.56     ), Y ) ) ) ] )
% 0.76/1.56  , clause( 1826, [ ~( member( X, complement( 'universal_class' ) ) ) ] )
% 0.76/1.56  , 0, clause( 19, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 0.76/1.56     )
% 0.76/1.56  , 1, substitution( 0, [ :=( X, X )] ), substitution( 1, [ :=( X, X ), :=( Y
% 0.76/1.56    , complement( 'universal_class' ) ), :=( Z, Y )] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 1837, [ ~( member( X, intersection( complement( 'universal_class' )
% 0.76/1.56    , Y ) ) ) ] )
% 0.76/1.56  , clause( 10252, [ ~( member( X, intersection( complement( 
% 0.76/1.56    'universal_class' ), Y ) ) ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.76/1.56     )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  eqswap(
% 0.76/1.56  clause( 10253, [ =( 'null_class', X ), member( regular( X ), X ) ] )
% 0.76/1.56  , clause( 64, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 0.76/1.56  , 0, substitution( 0, [ :=( X, X )] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  resolution(
% 0.76/1.56  clause( 10254, [ =( 'null_class', intersection( complement( 
% 0.76/1.56    'universal_class' ), X ) ) ] )
% 0.76/1.56  , clause( 1837, [ ~( member( X, intersection( complement( 'universal_class'
% 0.76/1.56     ), Y ) ) ) ] )
% 0.76/1.56  , 0, clause( 10253, [ =( 'null_class', X ), member( regular( X ), X ) ] )
% 0.76/1.56  , 1, substitution( 0, [ :=( X, regular( intersection( complement( 
% 0.76/1.56    'universal_class' ), X ) ) ), :=( Y, X )] ), substitution( 1, [ :=( X, 
% 0.76/1.56    intersection( complement( 'universal_class' ), X ) )] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  eqswap(
% 0.76/1.56  clause( 10255, [ =( intersection( complement( 'universal_class' ), X ), 
% 0.76/1.56    'null_class' ) ] )
% 0.76/1.56  , clause( 10254, [ =( 'null_class', intersection( complement( 
% 0.76/1.56    'universal_class' ), X ) ) ] )
% 0.76/1.56  , 0, substitution( 0, [ :=( X, X )] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 6927, [ =( intersection( complement( 'universal_class' ), X ), 
% 0.76/1.56    'null_class' ) ] )
% 0.76/1.56  , clause( 10255, [ =( intersection( complement( 'universal_class' ), X ), 
% 0.76/1.56    'null_class' ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  paramod(
% 0.76/1.56  clause( 10257, [ ~( member( X, 'null_class' ) ) ] )
% 0.76/1.56  , clause( 6927, [ =( intersection( complement( 'universal_class' ), X ), 
% 0.76/1.56    'null_class' ) ] )
% 0.76/1.56  , 0, clause( 1837, [ ~( member( X, intersection( complement( 
% 0.76/1.56    'universal_class' ), Y ) ) ) ] )
% 0.76/1.56  , 0, 3, substitution( 0, [ :=( X, Y )] ), substitution( 1, [ :=( X, X ), 
% 0.76/1.56    :=( Y, Y )] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 7493, [ ~( member( X, 'null_class' ) ) ] )
% 0.76/1.56  , clause( 10257, [ ~( member( X, 'null_class' ) ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  resolution(
% 0.76/1.56  clause( 10258, [ ~( member( y, X ) ) ] )
% 0.76/1.56  , clause( 7493, [ ~( member( X, 'null_class' ) ) ] )
% 0.76/1.56  , 0, clause( 960, [ member( y, 'null_class' ), ~( member( y, X ) ) ] )
% 0.76/1.56  , 0, substitution( 0, [ :=( X, y )] ), substitution( 1, [ :=( X, X )] )
% 0.76/1.56    ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 7515, [ ~( member( y, X ) ) ] )
% 0.76/1.56  , clause( 10258, [ ~( member( y, X ) ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  resolution(
% 0.76/1.56  clause( 10259, [ ~( member( 'ordered_pair'( Y, y ), 'cross_product'( Z, X )
% 0.76/1.56     ) ) ] )
% 0.76/1.56  , clause( 7515, [ ~( member( y, X ) ) ] )
% 0.76/1.56  , 0, clause( 13, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 0.76/1.56     ) ) ), member( Y, T ) ] )
% 0.76/1.56  , 1, substitution( 0, [ :=( X, X )] ), substitution( 1, [ :=( X, Y ), :=( Y
% 0.76/1.56    , y ), :=( Z, Z ), :=( T, X )] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 7789, [ ~( member( 'ordered_pair'( X, y ), 'cross_product'( Y, Z )
% 0.76/1.56     ) ) ] )
% 0.76/1.56  , clause( 10259, [ ~( member( 'ordered_pair'( Y, y ), 'cross_product'( Z, X
% 0.76/1.56     ) ) ) ] )
% 0.76/1.56  , substitution( 0, [ :=( X, Z ), :=( Y, X ), :=( Z, Y )] ), 
% 0.76/1.56    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  resolution(
% 0.76/1.56  clause( 10260, [] )
% 0.76/1.56  , clause( 7789, [ ~( member( 'ordered_pair'( X, y ), 'cross_product'( Y, Z
% 0.76/1.56     ) ) ) ] )
% 0.76/1.56  , 0, clause( 90, [ member( 'ordered_pair'( x, y ), 'cross_product'( u, v )
% 0.76/1.56     ) ] )
% 0.76/1.56  , 0, substitution( 0, [ :=( X, x ), :=( Y, u ), :=( Z, v )] ), 
% 0.76/1.56    substitution( 1, [] )).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  subsumption(
% 0.76/1.56  clause( 9974, [] )
% 0.76/1.56  , clause( 10260, [] )
% 0.76/1.56  , substitution( 0, [] ), permutation( 0, [] ) ).
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  end.
% 0.76/1.56  
% 0.76/1.56  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.76/1.56  
% 0.76/1.56  Memory use:
% 0.76/1.56  
% 0.76/1.56  space for terms:        152967
% 0.76/1.56  space for clauses:      477882
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  clauses generated:      24080
% 0.76/1.56  clauses kept:           9975
% 0.76/1.56  clauses selected:       367
% 0.76/1.56  clauses deleted:        114
% 0.76/1.56  clauses inuse deleted:  100
% 0.76/1.56  
% 0.76/1.56  subsentry:          55543
% 0.76/1.56  literals s-matched: 43212
% 0.76/1.56  literals matched:   42536
% 0.76/1.56  full subsumption:   19457
% 0.76/1.56  
% 0.76/1.56  checksum:           -281399966
% 0.76/1.56  
% 0.76/1.56  
% 0.76/1.56  Bliksem ended
%------------------------------------------------------------------------------