TSTP Solution File: LCL106-1 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : LCL106-1 : TPTP v8.1.0. Released v1.0.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n008.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 : Sun Jul 17 07:50:22 EDT 2022

% Result   : Unsatisfiable 0.43s 1.08s
% Output   : Refutation 0.43s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.12  % Problem  : LCL106-1 : TPTP v8.1.0. Released v1.0.0.
% 0.03/0.13  % Command  : bliksem %s
% 0.13/0.34  % Computer : n008.cluster.edu
% 0.13/0.34  % Model    : x86_64 x86_64
% 0.13/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.34  % Memory   : 8042.1875MB
% 0.13/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.13/0.34  % CPULimit : 300
% 0.13/0.34  % DateTime : Mon Jul  4 06:30:08 EDT 2022
% 0.13/0.34  % 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     [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), ~( 'is_a_theorem'( X ) ), 
% 0.43/1.08    'is_a_theorem'( Y ) ],
% 0.43/1.08     [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y, Z ), 
% 0.43/1.08    equivalent( equivalent( Z, Y ), X ) ) ) ) ],
% 0.43/1.08     [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    X, Z ) ), equivalent( Y, Z ) ) ) ],
% 0.43/1.08     [ ~( 'is_a_theorem'( equivalent( equivalent( a, b ), equivalent( 
% 0.43/1.08    equivalent( c, a ), equivalent( c, b ) ) ) ) ) ]
% 0.43/1.08  ] .
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  percentage equality = 0.000000, percentage horn = 1.000000
% 0.43/1.08  This is a near-Horn, non-equality  problem
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  Options Used:
% 0.43/1.08  
% 0.43/1.08  useres =            1
% 0.43/1.08  useparamod =        0
% 0.43/1.08  useeqrefl =         0
% 0.43/1.08  useeqfact =         0
% 0.43/1.08  usefactor =         1
% 0.43/1.08  usesimpsplitting =  0
% 0.43/1.08  usesimpdemod =      0
% 0.43/1.08  usesimpres =        4
% 0.43/1.08  
% 0.43/1.08  resimpinuse      =  1000
% 0.43/1.08  resimpclauses =     20000
% 0.43/1.08  substype =          standard
% 0.43/1.08  backwardsubs =      1
% 0.43/1.08  selectoldest =      5
% 0.43/1.08  
% 0.43/1.08  litorderings [0] =  split
% 0.43/1.08  litorderings [1] =  liftord
% 0.43/1.08  
% 0.43/1.08  termordering =      none
% 0.43/1.08  
% 0.43/1.08  litapriori =        1
% 0.43/1.08  termapriori =       0
% 0.43/1.08  litaposteriori =    0
% 0.43/1.08  termaposteriori =   0
% 0.43/1.08  demodaposteriori =  0
% 0.43/1.08  ordereqreflfact =   0
% 0.43/1.08  
% 0.43/1.08  litselect =         negative
% 0.43/1.08  
% 0.43/1.08  maxweight =         30000
% 0.43/1.08  maxdepth =          30000
% 0.43/1.08  maxlength =         115
% 0.43/1.08  maxnrvars =         195
% 0.43/1.08  excuselevel =       0
% 0.43/1.08  increasemaxweight = 0
% 0.43/1.08  
% 0.43/1.08  maxselected =       10000000
% 0.43/1.08  maxnrclauses =      10000000
% 0.43/1.08  
% 0.43/1.08  showgenerated =    0
% 0.43/1.08  showkept =         0
% 0.43/1.08  showselected =     0
% 0.43/1.08  showdeleted =      0
% 0.43/1.08  showresimp =       1
% 0.43/1.08  showstatus =       2000
% 0.43/1.08  
% 0.43/1.08  prologoutput =     1
% 0.43/1.08  nrgoals =          5000000
% 0.43/1.08  totalproof =       1
% 0.43/1.08  
% 0.43/1.08  Symbols occurring in the translation:
% 0.43/1.08  
% 0.43/1.08  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 0.43/1.08  .  [1, 2]      (w:1, o:21, a:1, s:1, b:0), 
% 0.43/1.08  !  [4, 1]      (w:1, o:15, a:1, s:1, b:0), 
% 0.43/1.08  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.43/1.08  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.43/1.08  equivalent  [41, 2]      (w:1, o:46, a:1, s:1, b:0), 
% 0.43/1.08  'is_a_theorem'  [42, 1]      (w:1, o:20, a:1, s:1, b:0), 
% 0.43/1.08  a  [44, 0]      (w:1, o:12, a:1, s:1, b:0), 
% 0.43/1.08  b  [45, 0]      (w:1, o:13, a:1, s:1, b:0), 
% 0.43/1.08  c  [46, 0]      (w:1, o:14, a:1, s:1, b:0).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  Starting Search:
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  Bliksems!, er is een bewijs:
% 0.43/1.08  % SZS status Unsatisfiable
% 0.43/1.08  % SZS output start Refutation
% 0.43/1.08  
% 0.43/1.08  clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y )
% 0.43/1.08    , ~( 'is_a_theorem'( X ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 1, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y, Z )
% 0.43/1.08    , equivalent( equivalent( Z, Y ), X ) ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 2, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( X, Z ) ), equivalent( Y, Z ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 3, [ ~( 'is_a_theorem'( equivalent( equivalent( a, b ), equivalent( 
% 0.43/1.08    equivalent( c, a ), equivalent( c, b ) ) ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 4, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.43/1.08    equivalent( equivalent( X, Y ), equivalent( X, Z ) ), equivalent( Y, Z )
% 0.43/1.08     ), T ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 5, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.43/1.08    X, equivalent( equivalent( Y, Z ), equivalent( equivalent( Z, Y ), X ) )
% 0.43/1.08     ), T ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 6, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Y, X ), equivalent( equivalent( equivalent( Z, T ), 
% 0.43/1.08    equivalent( Z, U ) ), equivalent( T, U ) ) ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 7, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Y, X ), equivalent( Z, equivalent( equivalent( T, U ), 
% 0.43/1.08    equivalent( equivalent( U, T ), Z ) ) ) ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 9, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( 
% 0.43/1.08    equivalent( equivalent( T, U ), equivalent( T, W ) ), equivalent( U, W )
% 0.43/1.08     ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 12, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( T, 
% 0.43/1.08    equivalent( equivalent( U, W ), equivalent( equivalent( W, U ), T ) ) ) )
% 0.43/1.08     ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 14, [ 'is_a_theorem'( V0 ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( Z, X
% 0.43/1.08     ), equivalent( Z, Y ) ) ), equivalent( equivalent( equivalent( T, U ), 
% 0.43/1.08    equivalent( T, W ) ), equivalent( U, W ) ) ), V0 ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 17, [ 'is_a_theorem'( V0 ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( Z, X
% 0.43/1.08     ), equivalent( Z, Y ) ) ), equivalent( T, equivalent( equivalent( U, W )
% 0.43/1.08    , equivalent( equivalent( W, U ), T ) ) ) ), V0 ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 33, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.43/1.08    equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) ) ), equivalent( 
% 0.43/1.08    Z, T ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 105, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Z, X ), equivalent( Z, Y ) ) ) ) ] )
% 0.43/1.08  .
% 0.43/1.08  clause( 122, [] )
% 0.43/1.08  .
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  % SZS output end Refutation
% 0.43/1.08  found a proof!
% 0.43/1.08  
% 0.43/1.08  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.43/1.08  
% 0.43/1.08  initialclauses(
% 0.43/1.08  [ clause( 124, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), ~( 
% 0.43/1.08    'is_a_theorem'( X ) ), 'is_a_theorem'( Y ) ] )
% 0.43/1.08  , clause( 125, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y, 
% 0.43/1.08    Z ), equivalent( equivalent( Z, Y ), X ) ) ) ) ] )
% 0.43/1.08  , clause( 126, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.43/1.08    , equivalent( X, Z ) ), equivalent( Y, Z ) ) ) ] )
% 0.43/1.08  , clause( 127, [ ~( 'is_a_theorem'( equivalent( equivalent( a, b ), 
% 0.43/1.08    equivalent( equivalent( c, a ), equivalent( c, b ) ) ) ) ) ] )
% 0.43/1.08  ] ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y )
% 0.43/1.08    , ~( 'is_a_theorem'( X ) ) ] )
% 0.43/1.08  , clause( 124, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), ~( 
% 0.43/1.08    'is_a_theorem'( X ) ), 'is_a_theorem'( Y ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.43/1.08     ), ==>( 1, 2 ), ==>( 2, 1 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 1, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y, Z )
% 0.43/1.08    , equivalent( equivalent( Z, Y ), X ) ) ) ) ] )
% 0.43/1.08  , clause( 125, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y, 
% 0.43/1.08    Z ), equivalent( equivalent( Z, Y ), X ) ) ) ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.43/1.08    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 2, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( X, Z ) ), equivalent( Y, Z ) ) ) ] )
% 0.43/1.08  , clause( 126, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.43/1.08    , equivalent( X, Z ) ), equivalent( Y, Z ) ) ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.43/1.08    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 3, [ ~( 'is_a_theorem'( equivalent( equivalent( a, b ), equivalent( 
% 0.43/1.08    equivalent( c, a ), equivalent( c, b ) ) ) ) ) ] )
% 0.43/1.08  , clause( 127, [ ~( 'is_a_theorem'( equivalent( equivalent( a, b ), 
% 0.43/1.08    equivalent( equivalent( c, a ), equivalent( c, b ) ) ) ) ) ] )
% 0.43/1.08  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 129, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.43/1.08    equivalent( X, Y ), equivalent( X, Z ) ), equivalent( Y, Z ) ), T ) ) ), 
% 0.43/1.08    'is_a_theorem'( T ) ] )
% 0.43/1.08  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.43/1.08     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.43/1.08  , 2, clause( 2, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.43/1.08     ), equivalent( X, Z ) ), equivalent( Y, Z ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( X, Z ) ), equivalent( Y, Z ) ) ), :=( Y, T )] ), 
% 0.43/1.08    substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 4, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.43/1.08    equivalent( equivalent( X, Y ), equivalent( X, Z ) ), equivalent( Y, Z )
% 0.43/1.08     ), T ) ) ) ] )
% 0.43/1.08  , clause( 129, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.43/1.08    equivalent( X, Y ), equivalent( X, Z ) ), equivalent( Y, Z ) ), T ) ) ), 
% 0.43/1.08    'is_a_theorem'( T ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.43/1.08    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 131, [ ~( 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.43/1.08    equivalent( Y, Z ), equivalent( equivalent( Z, Y ), X ) ) ), T ) ) ), 
% 0.43/1.08    'is_a_theorem'( T ) ] )
% 0.43/1.08  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.43/1.08     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.43/1.08  , 2, clause( 1, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y
% 0.43/1.08    , Z ), equivalent( equivalent( Z, Y ), X ) ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, equivalent( X, equivalent( equivalent( Y, Z
% 0.43/1.08     ), equivalent( equivalent( Z, Y ), X ) ) ) ), :=( Y, T )] ), 
% 0.43/1.08    substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 5, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.43/1.08    X, equivalent( equivalent( Y, Z ), equivalent( equivalent( Z, Y ), X ) )
% 0.43/1.08     ), T ) ) ) ] )
% 0.43/1.08  , clause( 131, [ ~( 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.43/1.08    equivalent( Y, Z ), equivalent( equivalent( Z, Y ), X ) ) ), T ) ) ), 
% 0.43/1.08    'is_a_theorem'( T ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.43/1.08    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 132, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Y, X ), equivalent( equivalent( equivalent( Z, T ), 
% 0.43/1.08    equivalent( Z, U ) ), equivalent( T, U ) ) ) ) ) ] )
% 0.43/1.08  , clause( 4, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( X, Z ) ), 
% 0.43/1.08    equivalent( Y, Z ) ), T ) ) ) ] )
% 0.43/1.08  , 1, clause( 1, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y
% 0.43/1.08    , Z ), equivalent( equivalent( Z, Y ), X ) ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, Z ), :=( Y, T ), :=( Z, U ), :=( T, 
% 0.43/1.08    equivalent( equivalent( X, Y ), equivalent( equivalent( Y, X ), 
% 0.43/1.08    equivalent( equivalent( equivalent( Z, T ), equivalent( Z, U ) ), 
% 0.43/1.08    equivalent( T, U ) ) ) ) )] ), substitution( 1, [ :=( X, equivalent( 
% 0.43/1.08    equivalent( equivalent( Z, T ), equivalent( Z, U ) ), equivalent( T, U )
% 0.43/1.08     ) ), :=( Y, X ), :=( Z, Y )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 6, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Y, X ), equivalent( equivalent( equivalent( Z, T ), 
% 0.43/1.08    equivalent( Z, U ) ), equivalent( T, U ) ) ) ) ) ] )
% 0.43/1.08  , clause( 132, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Y, X ), equivalent( equivalent( equivalent( Z, T ), 
% 0.43/1.08    equivalent( Z, U ) ), equivalent( T, U ) ) ) ) ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.43/1.08    , U )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 133, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Y, X ), equivalent( Z, equivalent( equivalent( T, U ), 
% 0.43/1.08    equivalent( equivalent( U, T ), Z ) ) ) ) ) ) ] )
% 0.43/1.08  , clause( 5, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( X, equivalent( equivalent( Y, Z ), equivalent( equivalent( Z
% 0.43/1.08    , Y ), X ) ) ), T ) ) ) ] )
% 0.43/1.08  , 1, clause( 1, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y
% 0.43/1.08    , Z ), equivalent( equivalent( Z, Y ), X ) ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, Z ), :=( Y, T ), :=( Z, U ), :=( T, 
% 0.43/1.08    equivalent( equivalent( X, Y ), equivalent( equivalent( Y, X ), 
% 0.43/1.08    equivalent( Z, equivalent( equivalent( T, U ), equivalent( equivalent( U
% 0.43/1.08    , T ), Z ) ) ) ) ) )] ), substitution( 1, [ :=( X, equivalent( Z, 
% 0.43/1.08    equivalent( equivalent( T, U ), equivalent( equivalent( U, T ), Z ) ) ) )
% 0.43/1.08    , :=( Y, X ), :=( Z, Y )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 7, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Y, X ), equivalent( Z, equivalent( equivalent( T, U ), 
% 0.43/1.08    equivalent( equivalent( U, T ), Z ) ) ) ) ) ) ] )
% 0.43/1.08  , clause( 133, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Y, X ), equivalent( Z, equivalent( equivalent( T, U ), 
% 0.43/1.08    equivalent( equivalent( U, T ), Z ) ) ) ) ) ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.43/1.08    , U )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 134, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( 
% 0.43/1.08    equivalent( equivalent( T, U ), equivalent( T, W ) ), equivalent( U, W )
% 0.43/1.08     ) ) ) ] )
% 0.43/1.08  , clause( 4, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( X, Z ) ), 
% 0.43/1.08    equivalent( Y, Z ) ), T ) ) ) ] )
% 0.43/1.08  , 1, clause( 6, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Y, X ), equivalent( equivalent( equivalent( Z, T
% 0.43/1.08     ), equivalent( Z, U ) ), equivalent( T, U ) ) ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, Z ), :=( Y, X ), :=( Z, Y ), :=( T, 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( Z, X
% 0.43/1.08     ), equivalent( Z, Y ) ) ), equivalent( equivalent( equivalent( T, U ), 
% 0.43/1.08    equivalent( T, W ) ), equivalent( U, W ) ) ) )] ), substitution( 1, [ 
% 0.43/1.08    :=( X, equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), :=( Y, 
% 0.43/1.08    equivalent( X, Y ) ), :=( Z, T ), :=( T, U ), :=( U, W )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 9, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( 
% 0.43/1.08    equivalent( equivalent( T, U ), equivalent( T, W ) ), equivalent( U, W )
% 0.43/1.08     ) ) ) ] )
% 0.43/1.08  , clause( 134, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.43/1.08    , equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( 
% 0.43/1.08    equivalent( equivalent( T, U ), equivalent( T, W ) ), equivalent( U, W )
% 0.43/1.08     ) ) ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.43/1.08    , U ), :=( W, W )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 135, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( T, 
% 0.43/1.08    equivalent( equivalent( U, W ), equivalent( equivalent( W, U ), T ) ) ) )
% 0.43/1.08     ) ] )
% 0.43/1.08  , clause( 4, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( X, Z ) ), 
% 0.43/1.08    equivalent( Y, Z ) ), T ) ) ) ] )
% 0.43/1.08  , 1, clause( 7, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Y, X ), equivalent( Z, equivalent( equivalent( T
% 0.43/1.08    , U ), equivalent( equivalent( U, T ), Z ) ) ) ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, Z ), :=( Y, X ), :=( Z, Y ), :=( T, 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( Z, X
% 0.43/1.08     ), equivalent( Z, Y ) ) ), equivalent( T, equivalent( equivalent( U, W )
% 0.43/1.08    , equivalent( equivalent( W, U ), T ) ) ) ) )] ), substitution( 1, [ :=( 
% 0.43/1.08    X, equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), :=( Y, 
% 0.43/1.08    equivalent( X, Y ) ), :=( Z, T ), :=( T, U ), :=( U, W )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 12, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( T, 
% 0.43/1.08    equivalent( equivalent( U, W ), equivalent( equivalent( W, U ), T ) ) ) )
% 0.43/1.08     ) ] )
% 0.43/1.08  , clause( 135, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.43/1.08    , equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( T, 
% 0.43/1.08    equivalent( equivalent( U, W ), equivalent( equivalent( W, U ), T ) ) ) )
% 0.43/1.08     ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.43/1.08    , U ), :=( W, W )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 137, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.43/1.08    equivalent( X, Y ), equivalent( equivalent( Z, X ), equivalent( Z, Y ) )
% 0.43/1.08     ), equivalent( equivalent( equivalent( T, U ), equivalent( T, W ) ), 
% 0.43/1.08    equivalent( U, W ) ) ), V0 ) ) ), 'is_a_theorem'( V0 ) ] )
% 0.43/1.08  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.43/1.08     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.43/1.08  , 2, clause( 9, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.43/1.08     ), equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( 
% 0.43/1.08    equivalent( equivalent( T, U ), equivalent( T, W ) ), equivalent( U, W )
% 0.43/1.08     ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( 
% 0.43/1.08    equivalent( equivalent( T, U ), equivalent( T, W ) ), equivalent( U, W )
% 0.43/1.08     ) ) ), :=( Y, V0 )] ), substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z
% 0.43/1.08    , Z ), :=( T, T ), :=( U, U ), :=( W, W )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 14, [ 'is_a_theorem'( V0 ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( Z, X
% 0.43/1.08     ), equivalent( Z, Y ) ) ), equivalent( equivalent( equivalent( T, U ), 
% 0.43/1.08    equivalent( T, W ) ), equivalent( U, W ) ) ), V0 ) ) ) ] )
% 0.43/1.08  , clause( 137, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.43/1.08    equivalent( X, Y ), equivalent( equivalent( Z, X ), equivalent( Z, Y ) )
% 0.43/1.08     ), equivalent( equivalent( equivalent( T, U ), equivalent( T, W ) ), 
% 0.43/1.08    equivalent( U, W ) ) ), V0 ) ) ), 'is_a_theorem'( V0 ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.43/1.08    , U ), :=( W, W ), :=( V0, V0 )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1
% 0.43/1.08    , 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 139, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.43/1.08    equivalent( X, Y ), equivalent( equivalent( Z, X ), equivalent( Z, Y ) )
% 0.43/1.08     ), equivalent( T, equivalent( equivalent( U, W ), equivalent( equivalent( 
% 0.43/1.08    W, U ), T ) ) ) ), V0 ) ) ), 'is_a_theorem'( V0 ) ] )
% 0.43/1.08  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.43/1.08     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.43/1.08  , 2, clause( 12, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.43/1.08     ), equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( T
% 0.43/1.08    , equivalent( equivalent( U, W ), equivalent( equivalent( W, U ), T ) ) )
% 0.43/1.08     ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ), equivalent( T, 
% 0.43/1.08    equivalent( equivalent( U, W ), equivalent( equivalent( W, U ), T ) ) ) )
% 0.43/1.08     ), :=( Y, V0 )] ), substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )
% 0.43/1.08    , :=( T, T ), :=( U, U ), :=( W, W )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 17, [ 'is_a_theorem'( V0 ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( Z, X
% 0.43/1.08     ), equivalent( Z, Y ) ) ), equivalent( T, equivalent( equivalent( U, W )
% 0.43/1.08    , equivalent( equivalent( W, U ), T ) ) ) ), V0 ) ) ) ] )
% 0.43/1.08  , clause( 139, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.43/1.08    equivalent( X, Y ), equivalent( equivalent( Z, X ), equivalent( Z, Y ) )
% 0.43/1.08     ), equivalent( T, equivalent( equivalent( U, W ), equivalent( equivalent( 
% 0.43/1.08    W, U ), T ) ) ) ), V0 ) ) ), 'is_a_theorem'( V0 ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.43/1.08    , U ), :=( W, W ), :=( V0, V0 )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1
% 0.43/1.08    , 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 140, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.43/1.08    equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) ) ), equivalent( 
% 0.43/1.08    Z, T ) ) ) ] )
% 0.43/1.08  , clause( 14, [ 'is_a_theorem'( V0 ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( Z, X
% 0.43/1.08     ), equivalent( Z, Y ) ) ), equivalent( equivalent( equivalent( T, U ), 
% 0.43/1.08    equivalent( T, W ) ), equivalent( U, W ) ) ), V0 ) ) ) ] )
% 0.43/1.08  , 1, clause( 2, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.43/1.08     ), equivalent( X, Z ) ), equivalent( Y, Z ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, equivalent( Y, Z ) ), :=( Y, equivalent( Y, 
% 0.43/1.08    T ) ), :=( Z, X ), :=( T, Y ), :=( U, Z ), :=( W, T ), :=( V0, equivalent( 
% 0.43/1.08    equivalent( equivalent( X, equivalent( Y, Z ) ), equivalent( X, 
% 0.43/1.08    equivalent( Y, T ) ) ), equivalent( Z, T ) ) )] ), substitution( 1, [ 
% 0.43/1.08    :=( X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), :=( Y, 
% 0.43/1.08    equivalent( equivalent( X, equivalent( Y, Z ) ), equivalent( X, 
% 0.43/1.08    equivalent( Y, T ) ) ) ), :=( Z, equivalent( Z, T ) )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 33, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.43/1.08    equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) ) ), equivalent( 
% 0.43/1.08    Z, T ) ) ) ] )
% 0.43/1.08  , clause( 140, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.43/1.08    equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) ) ), equivalent( 
% 0.43/1.08    Z, T ) ) ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.43/1.08    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 141, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Z, X ), equivalent( Z, Y ) ) ) ) ] )
% 0.43/1.08  , clause( 17, [ 'is_a_theorem'( V0 ), ~( 'is_a_theorem'( equivalent( 
% 0.43/1.08    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( Z, X
% 0.43/1.08     ), equivalent( Z, Y ) ) ), equivalent( T, equivalent( equivalent( U, W )
% 0.43/1.08    , equivalent( equivalent( W, U ), T ) ) ) ), V0 ) ) ) ] )
% 0.43/1.08  , 1, clause( 33, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.43/1.08    equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) ) ), equivalent( 
% 0.43/1.08    Z, T ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [ :=( X, Z ), :=( Y, Y ), :=( Z, X ), :=( T, 
% 0.43/1.08    equivalent( Z, Y ) ), :=( U, X ), :=( W, Z ), :=( V0, equivalent( 
% 0.43/1.08    equivalent( X, Y ), equivalent( equivalent( Z, X ), equivalent( Z, Y ) )
% 0.43/1.08     ) )] ), substitution( 1, [ :=( X, equivalent( Z, Y ) ), :=( Y, 
% 0.43/1.08    equivalent( X, Z ) ), :=( Z, equivalent( X, Y ) ), :=( T, equivalent( 
% 0.43/1.08    equivalent( Z, X ), equivalent( Z, Y ) ) )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 105, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Z, X ), equivalent( Z, Y ) ) ) ) ] )
% 0.43/1.08  , clause( 141, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.43/1.08    equivalent( Z, X ), equivalent( Z, Y ) ) ) ) ] )
% 0.43/1.08  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.43/1.08    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  resolution(
% 0.43/1.08  clause( 142, [] )
% 0.43/1.08  , clause( 3, [ ~( 'is_a_theorem'( equivalent( equivalent( a, b ), 
% 0.43/1.08    equivalent( equivalent( c, a ), equivalent( c, b ) ) ) ) ) ] )
% 0.43/1.08  , 0, clause( 105, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.43/1.08    equivalent( equivalent( Z, X ), equivalent( Z, Y ) ) ) ) ] )
% 0.43/1.08  , 0, substitution( 0, [] ), substitution( 1, [ :=( X, a ), :=( Y, b ), :=( 
% 0.43/1.08    Z, c )] )).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  subsumption(
% 0.43/1.08  clause( 122, [] )
% 0.43/1.08  , clause( 142, [] )
% 0.43/1.08  , substitution( 0, [] ), permutation( 0, [] ) ).
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  end.
% 0.43/1.08  
% 0.43/1.08  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.43/1.08  
% 0.43/1.08  Memory use:
% 0.43/1.08  
% 0.43/1.08  space for terms:        3942
% 0.43/1.08  space for clauses:      20030
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  clauses generated:      133
% 0.43/1.08  clauses kept:           123
% 0.43/1.08  clauses selected:       32
% 0.43/1.08  clauses deleted:        0
% 0.43/1.08  clauses inuse deleted:  0
% 0.43/1.08  
% 0.43/1.08  subsentry:          43
% 0.43/1.08  literals s-matched: 10
% 0.43/1.08  literals matched:   10
% 0.43/1.08  full subsumption:   0
% 0.43/1.08  
% 0.43/1.08  checksum:           -1074405846
% 0.43/1.08  
% 0.43/1.08  
% 0.43/1.08  Bliksem ended
%------------------------------------------------------------------------------