TSTP Solution File: SET047-5 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : SET047-5 : TPTP v8.1.0. Released v1.0.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n013.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 22:46:07 EDT 2022

% Result   : Unsatisfiable 0.42s 1.04s
% Output   : Refutation 0.42s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.11  % Problem  : SET047-5 : TPTP v8.1.0. Released v1.0.0.
% 0.07/0.12  % Command  : bliksem %s
% 0.12/0.33  % Computer : n013.cluster.edu
% 0.12/0.33  % Model    : x86_64 x86_64
% 0.12/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33  % Memory   : 8042.1875MB
% 0.12/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33  % CPULimit : 300
% 0.12/0.33  % DateTime : Sun Jul 10 00:35:44 EDT 2022
% 0.12/0.33  % CPUTime  : 
% 0.42/1.04  *** allocated 10000 integers for termspace/termends
% 0.42/1.04  *** allocated 10000 integers for clauses
% 0.42/1.04  *** allocated 10000 integers for justifications
% 0.42/1.04  Bliksem 1.12
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  Automatic Strategy Selection
% 0.42/1.04  
% 0.42/1.04  Clauses:
% 0.42/1.04  [
% 0.42/1.04     [ ~( 'set_equal'( X, Y ) ), ~( element( Z, X ) ), element( Z, Y ) ],
% 0.42/1.04     [ ~( 'set_equal'( X, Y ) ), ~( element( Z, Y ) ), element( Z, X ) ],
% 0.42/1.04     [ element( f( X, Y ), X ), element( f( X, Y ), Y ), 'set_equal'( X, Y )
% 0.42/1.04     ],
% 0.42/1.04     [ ~( element( f( X, Y ), Y ) ), ~( element( f( X, Y ), X ) ), 
% 0.42/1.04    'set_equal'( X, Y ) ],
% 0.42/1.04     [ 'set_equal'( a, b ), 'set_equal'( b, a ) ],
% 0.42/1.04     [ ~( 'set_equal'( b, a ) ), ~( 'set_equal'( a, b ) ) ]
% 0.42/1.04  ] .
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  percentage equality = 0.000000, percentage horn = 0.666667
% 0.42/1.04  This a non-horn, non-equality problem
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  Options Used:
% 0.42/1.04  
% 0.42/1.04  useres =            1
% 0.42/1.04  useparamod =        0
% 0.42/1.04  useeqrefl =         0
% 0.42/1.04  useeqfact =         0
% 0.42/1.04  usefactor =         1
% 0.42/1.04  usesimpsplitting =  0
% 0.42/1.04  usesimpdemod =      0
% 0.42/1.04  usesimpres =        3
% 0.42/1.04  
% 0.42/1.04  resimpinuse      =  1000
% 0.42/1.04  resimpclauses =     20000
% 0.42/1.04  substype =          standard
% 0.42/1.04  backwardsubs =      1
% 0.42/1.04  selectoldest =      5
% 0.42/1.04  
% 0.42/1.04  litorderings [0] =  split
% 0.42/1.04  litorderings [1] =  liftord
% 0.42/1.04  
% 0.42/1.04  termordering =      none
% 0.42/1.04  
% 0.42/1.04  litapriori =        1
% 0.42/1.04  termapriori =       0
% 0.42/1.04  litaposteriori =    0
% 0.42/1.04  termaposteriori =   0
% 0.42/1.04  demodaposteriori =  0
% 0.42/1.04  ordereqreflfact =   0
% 0.42/1.04  
% 0.42/1.04  litselect =         none
% 0.42/1.04  
% 0.42/1.04  maxweight =         15
% 0.42/1.04  maxdepth =          30000
% 0.42/1.04  maxlength =         115
% 0.42/1.04  maxnrvars =         195
% 0.42/1.04  excuselevel =       1
% 0.42/1.04  increasemaxweight = 1
% 0.42/1.04  
% 0.42/1.04  maxselected =       10000000
% 0.42/1.04  maxnrclauses =      10000000
% 0.42/1.04  
% 0.42/1.04  showgenerated =    0
% 0.42/1.04  showkept =         0
% 0.42/1.04  showselected =     0
% 0.42/1.04  showdeleted =      0
% 0.42/1.04  showresimp =       1
% 0.42/1.04  showstatus =       2000
% 0.42/1.04  
% 0.42/1.04  prologoutput =     1
% 0.42/1.04  nrgoals =          5000000
% 0.42/1.04  totalproof =       1
% 0.42/1.04  
% 0.42/1.04  Symbols occurring in the translation:
% 0.42/1.04  
% 0.42/1.04  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 0.42/1.04  .  [1, 2]      (w:1, o:19, a:1, s:1, b:0), 
% 0.42/1.04  !  [4, 1]      (w:0, o:14, a:1, s:1, b:0), 
% 0.42/1.04  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.42/1.04  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.42/1.04  'set_equal'  [41, 2]      (w:1, o:44, a:1, s:1, b:0), 
% 0.42/1.04  element  [43, 2]      (w:1, o:45, a:1, s:1, b:0), 
% 0.42/1.04  f  [44, 2]      (w:1, o:46, a:1, s:1, b:0), 
% 0.42/1.04  a  [45, 0]      (w:1, o:12, a:1, s:1, b:0), 
% 0.42/1.04  b  [46, 0]      (w:1, o:13, a:1, s:1, b:0).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  Starting Search:
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  Bliksems!, er is een bewijs:
% 0.42/1.04  % SZS status Unsatisfiable
% 0.42/1.04  % SZS output start Refutation
% 0.42/1.04  
% 0.42/1.04  clause( 0, [ ~( 'set_equal'( X, Y ) ), element( Z, Y ), ~( element( Z, X )
% 0.42/1.04     ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 1, [ ~( 'set_equal'( X, Y ) ), element( Z, X ), ~( element( Z, Y )
% 0.42/1.04     ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 2, [ 'set_equal'( X, Y ), element( f( X, Y ), X ), element( f( X, Y
% 0.42/1.04     ), Y ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 3, [ 'set_equal'( X, Y ), ~( element( f( X, Y ), Y ) ), ~( element( 
% 0.42/1.04    f( X, Y ), X ) ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 4, [ 'set_equal'( b, a ), 'set_equal'( a, b ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 5, [ ~( 'set_equal'( b, a ) ), ~( 'set_equal'( a, b ) ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 21, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, Z ) ), element( f( X
% 0.42/1.04    , Y ), Z ), element( f( X, Y ), X ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 22, [ 'set_equal'( X, Y ), ~( 'set_equal'( Z, X ) ), element( f( X
% 0.42/1.04    , Y ), Z ), element( f( X, Y ), Y ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 24, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( f( X
% 0.42/1.04    , Y ), Y ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 25, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( f( X
% 0.42/1.04    , Y ), X ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 30, [ ~( 'set_equal'( Y, X ) ), 'set_equal'( X, Y ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 35, [ 'set_equal'( b, a ) ] )
% 0.42/1.04  .
% 0.42/1.04  clause( 36, [] )
% 0.42/1.04  .
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  % SZS output end Refutation
% 0.42/1.04  found a proof!
% 0.42/1.04  
% 0.42/1.04  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.42/1.04  
% 0.42/1.04  initialclauses(
% 0.42/1.04  [ clause( 38, [ ~( 'set_equal'( X, Y ) ), ~( element( Z, X ) ), element( Z
% 0.42/1.04    , Y ) ] )
% 0.42/1.04  , clause( 39, [ ~( 'set_equal'( X, Y ) ), ~( element( Z, Y ) ), element( Z
% 0.42/1.04    , X ) ] )
% 0.42/1.04  , clause( 40, [ element( f( X, Y ), X ), element( f( X, Y ), Y ), 
% 0.42/1.04    'set_equal'( X, Y ) ] )
% 0.42/1.04  , clause( 41, [ ~( element( f( X, Y ), Y ) ), ~( element( f( X, Y ), X ) )
% 0.42/1.04    , 'set_equal'( X, Y ) ] )
% 0.42/1.04  , clause( 42, [ 'set_equal'( a, b ), 'set_equal'( b, a ) ] )
% 0.42/1.04  , clause( 43, [ ~( 'set_equal'( b, a ) ), ~( 'set_equal'( a, b ) ) ] )
% 0.42/1.04  ] ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 0, [ ~( 'set_equal'( X, Y ) ), element( Z, Y ), ~( element( Z, X )
% 0.42/1.04     ) ] )
% 0.42/1.04  , clause( 38, [ ~( 'set_equal'( X, Y ) ), ~( element( Z, X ) ), element( Z
% 0.42/1.04    , Y ) ] )
% 0.42/1.04  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.42/1.04    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 2 ), ==>( 2, 1 )] ) ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 1, [ ~( 'set_equal'( X, Y ) ), element( Z, X ), ~( element( Z, Y )
% 0.42/1.04     ) ] )
% 0.42/1.04  , clause( 39, [ ~( 'set_equal'( X, Y ) ), ~( element( Z, Y ) ), element( Z
% 0.42/1.04    , X ) ] )
% 0.42/1.04  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.42/1.04    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 2 ), ==>( 2, 1 )] ) ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 2, [ 'set_equal'( X, Y ), element( f( X, Y ), X ), element( f( X, Y
% 0.42/1.04     ), Y ) ] )
% 0.42/1.04  , clause( 40, [ element( f( X, Y ), X ), element( f( X, Y ), Y ), 
% 0.42/1.04    'set_equal'( X, Y ) ] )
% 0.42/1.04  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 1
% 0.42/1.04     ), ==>( 1, 2 ), ==>( 2, 0 )] ) ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 3, [ 'set_equal'( X, Y ), ~( element( f( X, Y ), Y ) ), ~( element( 
% 0.42/1.04    f( X, Y ), X ) ) ] )
% 0.42/1.04  , clause( 41, [ ~( element( f( X, Y ), Y ) ), ~( element( f( X, Y ), X ) )
% 0.42/1.04    , 'set_equal'( X, Y ) ] )
% 0.42/1.04  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 1
% 0.42/1.04     ), ==>( 1, 2 ), ==>( 2, 0 )] ) ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 4, [ 'set_equal'( b, a ), 'set_equal'( a, b ) ] )
% 0.42/1.04  , clause( 42, [ 'set_equal'( a, b ), 'set_equal'( b, a ) ] )
% 0.42/1.04  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] )
% 0.42/1.04     ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 5, [ ~( 'set_equal'( b, a ) ), ~( 'set_equal'( a, b ) ) ] )
% 0.42/1.04  , clause( 43, [ ~( 'set_equal'( b, a ) ), ~( 'set_equal'( a, b ) ) ] )
% 0.42/1.04  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 0.42/1.04     ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  resolution(
% 0.42/1.04  clause( 53, [ ~( 'set_equal'( X, Y ) ), element( f( Z, X ), Y ), 
% 0.42/1.04    'set_equal'( Z, X ), element( f( Z, X ), Z ) ] )
% 0.42/1.04  , clause( 0, [ ~( 'set_equal'( X, Y ) ), element( Z, Y ), ~( element( Z, X
% 0.42/1.04     ) ) ] )
% 0.42/1.04  , 2, clause( 2, [ 'set_equal'( X, Y ), element( f( X, Y ), X ), element( f( 
% 0.42/1.04    X, Y ), Y ) ] )
% 0.42/1.04  , 2, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, f( Z, X ) )] ), 
% 0.42/1.04    substitution( 1, [ :=( X, Z ), :=( Y, X )] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 21, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, Z ) ), element( f( X
% 0.42/1.04    , Y ), Z ), element( f( X, Y ), X ) ] )
% 0.42/1.04  , clause( 53, [ ~( 'set_equal'( X, Y ) ), element( f( Z, X ), Y ), 
% 0.42/1.04    'set_equal'( Z, X ), element( f( Z, X ), Z ) ] )
% 0.42/1.04  , substitution( 0, [ :=( X, Y ), :=( Y, Z ), :=( Z, X )] ), 
% 0.42/1.04    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 2 ), ==>( 2, 0 ), ==>( 3, 3 )] )
% 0.42/1.04     ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  resolution(
% 0.42/1.04  clause( 61, [ ~( 'set_equal'( X, Y ) ), element( f( Y, Z ), X ), 
% 0.42/1.04    'set_equal'( Y, Z ), element( f( Y, Z ), Z ) ] )
% 0.42/1.04  , clause( 1, [ ~( 'set_equal'( X, Y ) ), element( Z, X ), ~( element( Z, Y
% 0.42/1.04     ) ) ] )
% 0.42/1.04  , 2, clause( 2, [ 'set_equal'( X, Y ), element( f( X, Y ), X ), element( f( 
% 0.42/1.04    X, Y ), Y ) ] )
% 0.42/1.04  , 1, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, f( Y, Z ) )] ), 
% 0.42/1.04    substitution( 1, [ :=( X, Y ), :=( Y, Z )] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 22, [ 'set_equal'( X, Y ), ~( 'set_equal'( Z, X ) ), element( f( X
% 0.42/1.04    , Y ), Z ), element( f( X, Y ), Y ) ] )
% 0.42/1.04  , clause( 61, [ ~( 'set_equal'( X, Y ) ), element( f( Y, Z ), X ), 
% 0.42/1.04    'set_equal'( Y, Z ), element( f( Y, Z ), Z ) ] )
% 0.42/1.04  , substitution( 0, [ :=( X, Z ), :=( Y, X ), :=( Z, Y )] ), 
% 0.42/1.04    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 2 ), ==>( 2, 0 ), ==>( 3, 3 )] )
% 0.42/1.04     ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  factor(
% 0.42/1.04  clause( 68, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( f( X
% 0.42/1.04    , Y ), Y ) ] )
% 0.42/1.04  , clause( 22, [ 'set_equal'( X, Y ), ~( 'set_equal'( Z, X ) ), element( f( 
% 0.42/1.04    X, Y ), Z ), element( f( X, Y ), Y ) ] )
% 0.42/1.04  , 2, 3, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Y )] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 24, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( f( X
% 0.42/1.04    , Y ), Y ) ] )
% 0.42/1.04  , clause( 68, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( f( 
% 0.42/1.04    X, Y ), Y ) ] )
% 0.42/1.04  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.42/1.04     ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  factor(
% 0.42/1.04  clause( 69, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( f( X
% 0.42/1.04    , Y ), X ) ] )
% 0.42/1.04  , clause( 21, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, Z ) ), element( f( 
% 0.42/1.04    X, Y ), Z ), element( f( X, Y ), X ) ] )
% 0.42/1.04  , 2, 3, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, X )] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 25, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( f( X
% 0.42/1.04    , Y ), X ) ] )
% 0.42/1.04  , clause( 69, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( f( 
% 0.42/1.04    X, Y ), X ) ] )
% 0.42/1.04  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.42/1.04     ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  resolution(
% 0.42/1.04  clause( 70, [ 'set_equal'( X, Y ), ~( element( f( X, Y ), X ) ), 
% 0.42/1.04    'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ) ] )
% 0.42/1.04  , clause( 3, [ 'set_equal'( X, Y ), ~( element( f( X, Y ), Y ) ), ~( 
% 0.42/1.04    element( f( X, Y ), X ) ) ] )
% 0.42/1.04  , 1, clause( 24, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( 
% 0.42/1.04    f( X, Y ), Y ) ] )
% 0.42/1.04  , 2, substitution( 0, [ :=( X, X ), :=( Y, Y )] ), substitution( 1, [ :=( X
% 0.42/1.04    , X ), :=( Y, Y )] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  resolution(
% 0.42/1.04  clause( 72, [ 'set_equal'( X, Y ), 'set_equal'( X, Y ), ~( 'set_equal'( Y, 
% 0.42/1.04    X ) ), 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ) ] )
% 0.42/1.04  , clause( 70, [ 'set_equal'( X, Y ), ~( element( f( X, Y ), X ) ), 
% 0.42/1.04    'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ) ] )
% 0.42/1.04  , 1, clause( 25, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), element( 
% 0.42/1.04    f( X, Y ), X ) ] )
% 0.42/1.04  , 2, substitution( 0, [ :=( X, X ), :=( Y, Y )] ), substitution( 1, [ :=( X
% 0.42/1.04    , X ), :=( Y, Y )] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  factor(
% 0.42/1.04  clause( 74, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), 'set_equal'( X
% 0.42/1.04    , Y ), ~( 'set_equal'( Y, X ) ) ] )
% 0.42/1.04  , clause( 72, [ 'set_equal'( X, Y ), 'set_equal'( X, Y ), ~( 'set_equal'( Y
% 0.42/1.04    , X ) ), 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ) ] )
% 0.42/1.04  , 0, 1, substitution( 0, [ :=( X, X ), :=( Y, Y )] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  factor(
% 0.42/1.04  clause( 75, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), ~( 'set_equal'( 
% 0.42/1.04    Y, X ) ) ] )
% 0.42/1.04  , clause( 74, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), 'set_equal'( 
% 0.42/1.04    X, Y ), ~( 'set_equal'( Y, X ) ) ] )
% 0.42/1.04  , 0, 2, substitution( 0, [ :=( X, X ), :=( Y, Y )] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  factor(
% 0.42/1.04  clause( 76, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ) ] )
% 0.42/1.04  , clause( 75, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ), ~( 
% 0.42/1.04    'set_equal'( Y, X ) ) ] )
% 0.42/1.04  , 1, 2, substitution( 0, [ :=( X, X ), :=( Y, Y )] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 30, [ ~( 'set_equal'( Y, X ) ), 'set_equal'( X, Y ) ] )
% 0.42/1.04  , clause( 76, [ 'set_equal'( X, Y ), ~( 'set_equal'( Y, X ) ) ] )
% 0.42/1.04  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 1
% 0.42/1.04     ), ==>( 1, 0 )] ) ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  resolution(
% 0.42/1.04  clause( 79, [ 'set_equal'( b, a ), 'set_equal'( b, a ) ] )
% 0.42/1.04  , clause( 30, [ ~( 'set_equal'( Y, X ) ), 'set_equal'( X, Y ) ] )
% 0.42/1.04  , 0, clause( 4, [ 'set_equal'( b, a ), 'set_equal'( a, b ) ] )
% 0.42/1.04  , 1, substitution( 0, [ :=( X, b ), :=( Y, a )] ), substitution( 1, [] )
% 0.42/1.04    ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  factor(
% 0.42/1.04  clause( 80, [ 'set_equal'( b, a ) ] )
% 0.42/1.04  , clause( 79, [ 'set_equal'( b, a ), 'set_equal'( b, a ) ] )
% 0.42/1.04  , 0, 1, substitution( 0, [] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 35, [ 'set_equal'( b, a ) ] )
% 0.42/1.04  , clause( 80, [ 'set_equal'( b, a ) ] )
% 0.42/1.04  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  resolution(
% 0.42/1.04  clause( 83, [ ~( 'set_equal'( b, a ) ), ~( 'set_equal'( b, a ) ) ] )
% 0.42/1.04  , clause( 5, [ ~( 'set_equal'( b, a ) ), ~( 'set_equal'( a, b ) ) ] )
% 0.42/1.04  , 1, clause( 30, [ ~( 'set_equal'( Y, X ) ), 'set_equal'( X, Y ) ] )
% 0.42/1.04  , 1, substitution( 0, [] ), substitution( 1, [ :=( X, a ), :=( Y, b )] )
% 0.42/1.04    ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  factor(
% 0.42/1.04  clause( 84, [ ~( 'set_equal'( b, a ) ) ] )
% 0.42/1.04  , clause( 83, [ ~( 'set_equal'( b, a ) ), ~( 'set_equal'( b, a ) ) ] )
% 0.42/1.04  , 0, 1, substitution( 0, [] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  resolution(
% 0.42/1.04  clause( 87, [] )
% 0.42/1.04  , clause( 84, [ ~( 'set_equal'( b, a ) ) ] )
% 0.42/1.04  , 0, clause( 35, [ 'set_equal'( b, a ) ] )
% 0.42/1.04  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  subsumption(
% 0.42/1.04  clause( 36, [] )
% 0.42/1.04  , clause( 87, [] )
% 0.42/1.04  , substitution( 0, [] ), permutation( 0, [] ) ).
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  end.
% 0.42/1.04  
% 0.42/1.04  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.42/1.04  
% 0.42/1.04  Memory use:
% 0.42/1.04  
% 0.42/1.04  space for terms:        708
% 0.42/1.04  space for clauses:      1548
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  clauses generated:      139
% 0.42/1.04  clauses kept:           37
% 0.42/1.04  clauses selected:       14
% 0.42/1.04  clauses deleted:        1
% 0.42/1.04  clauses inuse deleted:  0
% 0.42/1.04  
% 0.42/1.04  subsentry:          538
% 0.42/1.04  literals s-matched: 465
% 0.42/1.04  literals matched:   456
% 0.42/1.04  full subsumption:   409
% 0.42/1.04  
% 0.42/1.04  checksum:           690028
% 0.42/1.04  
% 0.42/1.04  
% 0.42/1.04  Bliksem ended
%------------------------------------------------------------------------------