TSTP Solution File: GRP124-4.004 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : GRP124-4.004 : TPTP v8.1.0. Bugfixed v1.2.1.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n005.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 : Sat Jul 16 07:35:05 EDT 2022

% Result   : Unsatisfiable 0.73s 1.36s
% Output   : Refutation 0.73s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.12  % Problem  : GRP124-4.004 : TPTP v8.1.0. Bugfixed v1.2.1.
% 0.03/0.13  % Command  : bliksem %s
% 0.12/0.34  % Computer : n005.cluster.edu
% 0.12/0.34  % Model    : x86_64 x86_64
% 0.12/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.34  % Memory   : 8042.1875MB
% 0.12/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.34  % CPULimit : 300
% 0.12/0.34  % DateTime : Tue Jun 14 07:29:54 EDT 2022
% 0.12/0.34  % CPUTime  : 
% 0.73/1.36  *** allocated 10000 integers for termspace/termends
% 0.73/1.36  *** allocated 10000 integers for clauses
% 0.73/1.36  *** allocated 10000 integers for justifications
% 0.73/1.36  Bliksem 1.12
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  Automatic Strategy Selection
% 0.73/1.36  
% 0.73/1.36  Clauses:
% 0.73/1.36  [
% 0.73/1.36     [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), product( 'e_1', 
% 0.73/1.36    X, Y ), product( 'e_2', X, Y ), product( 'e_3', X, Y ), product( 'e_4', X
% 0.73/1.36    , Y ) ],
% 0.73/1.36     [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), product( X, 
% 0.73/1.36    'e_1', Y ), product( X, 'e_2', Y ), product( X, 'e_3', Y ), product( X, 
% 0.73/1.36    'e_4', Y ) ],
% 0.73/1.36     [ 'group_element'( 'e_1' ) ],
% 0.73/1.36     [ 'group_element'( 'e_2' ) ],
% 0.73/1.36     [ 'group_element'( 'e_3' ) ],
% 0.73/1.36     [ 'group_element'( 'e_4' ) ],
% 0.73/1.36     [ ~( equalish( 'e_1', 'e_2' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_1', 'e_3' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_1', 'e_4' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_2', 'e_1' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_2', 'e_3' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_2', 'e_4' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_3', 'e_1' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_3', 'e_2' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_3', 'e_4' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_4', 'e_1' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_4', 'e_2' ) ) ],
% 0.73/1.36     [ ~( equalish( 'e_4', 'e_3' ) ) ],
% 0.73/1.36     [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), product( X, Y, 
% 0.73/1.36    'e_1' ), product( X, Y, 'e_2' ), product( X, Y, 'e_3' ), product( X, Y, 
% 0.73/1.36    'e_4' ) ],
% 0.73/1.36     [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), equalish( Z, T ) ]
% 0.73/1.36    ,
% 0.73/1.36     [ ~( product( X, Y, Z ) ), ~( product( X, T, Z ) ), equalish( Y, T ) ]
% 0.73/1.36    ,
% 0.73/1.36     [ ~( product( X, Y, Z ) ), ~( product( T, Y, Z ) ), equalish( X, T ) ]
% 0.73/1.36    ,
% 0.73/1.36     [ product( X, X, X ) ],
% 0.73/1.36     [ ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ), ~( product( W, X, Y
% 0.73/1.36     ) ), ~( product( W, T, U ) ), equalish( X, T ) ],
% 0.73/1.36     [ ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ), ~( product( W, X, Y
% 0.73/1.36     ) ), ~( product( W, T, U ) ), equalish( Y, U ) ]
% 0.73/1.36  ] .
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  percentage equality = 0.000000, percentage horn = 0.880000
% 0.73/1.36  This a non-horn, non-equality problem
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  Options Used:
% 0.73/1.36  
% 0.73/1.36  useres =            1
% 0.73/1.36  useparamod =        0
% 0.73/1.36  useeqrefl =         0
% 0.73/1.36  useeqfact =         0
% 0.73/1.36  usefactor =         1
% 0.73/1.36  usesimpsplitting =  0
% 0.73/1.36  usesimpdemod =      0
% 0.73/1.36  usesimpres =        3
% 0.73/1.36  
% 0.73/1.36  resimpinuse      =  1000
% 0.73/1.36  resimpclauses =     20000
% 0.73/1.36  substype =          standard
% 0.73/1.36  backwardsubs =      1
% 0.73/1.36  selectoldest =      5
% 0.73/1.36  
% 0.73/1.36  litorderings [0] =  split
% 0.73/1.36  litorderings [1] =  liftord
% 0.73/1.36  
% 0.73/1.36  termordering =      none
% 0.73/1.36  
% 0.73/1.36  litapriori =        1
% 0.73/1.36  termapriori =       0
% 0.73/1.36  litaposteriori =    0
% 0.73/1.36  termaposteriori =   0
% 0.73/1.36  demodaposteriori =  0
% 0.73/1.36  ordereqreflfact =   0
% 0.73/1.36  
% 0.73/1.36  litselect =         none
% 0.73/1.36  
% 0.73/1.36  maxweight =         15
% 0.73/1.36  maxdepth =          30000
% 0.73/1.36  maxlength =         115
% 0.73/1.36  maxnrvars =         195
% 0.73/1.36  excuselevel =       1
% 0.73/1.36  increasemaxweight = 1
% 0.73/1.36  
% 0.73/1.36  maxselected =       10000000
% 0.73/1.36  maxnrclauses =      10000000
% 0.73/1.36  
% 0.73/1.36  showgenerated =    0
% 0.73/1.36  showkept =         0
% 0.73/1.36  showselected =     0
% 0.73/1.36  showdeleted =      0
% 0.73/1.36  showresimp =       1
% 0.73/1.36  showstatus =       2000
% 0.73/1.36  
% 0.73/1.36  prologoutput =     1
% 0.73/1.36  nrgoals =          5000000
% 0.73/1.36  totalproof =       1
% 0.73/1.36  
% 0.73/1.36  Symbols occurring in the translation:
% 0.73/1.36  
% 0.73/1.36  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 0.73/1.36  .  [1, 2]      (w:1, o:29, a:1, s:1, b:0), 
% 0.73/1.36  !  [4, 1]      (w:0, o:23, a:1, s:1, b:0), 
% 0.73/1.36  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.73/1.36  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.73/1.36  'group_element'  [40, 1]      (w:1, o:28, a:1, s:1, b:0), 
% 0.73/1.36  'e_1'  [42, 0]      (w:1, o:14, a:1, s:1, b:0), 
% 0.73/1.36  product  [43, 3]      (w:1, o:55, a:1, s:1, b:0), 
% 0.73/1.36  'e_2'  [44, 0]      (w:1, o:15, a:1, s:1, b:0), 
% 0.73/1.36  'e_3'  [45, 0]      (w:1, o:16, a:1, s:1, b:0), 
% 0.73/1.36  'e_4'  [46, 0]      (w:1, o:17, a:1, s:1, b:0), 
% 0.73/1.36  equalish  [47, 2]      (w:1, o:54, a:1, s:1, b:0).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  Starting Search:
% 0.73/1.36  
% 0.73/1.36  Resimplifying inuse:
% 0.73/1.36  Done
% 0.73/1.36  
% 0.73/1.36  Failed to find proof!
% 0.73/1.36  maxweight =   15
% 0.73/1.36  maxnrclauses = 10000000
% 0.73/1.36  Generated: 5413
% 0.73/1.36  Kept: 96
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  The strategy used was not complete!
% 0.73/1.36  
% 0.73/1.36  Increased maxweight to 16
% 0.73/1.36  
% 0.73/1.36  Starting Search:
% 0.73/1.36  
% 0.73/1.36  Resimplifying inuse:
% 0.73/1.36  Done
% 0.73/1.36  
% 0.73/1.36  Failed to find proof!
% 0.73/1.36  maxweight =   16
% 0.73/1.36  maxnrclauses = 10000000
% 0.73/1.36  Generated: 5413
% 0.73/1.36  Kept: 96
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  The strategy used was not complete!
% 0.73/1.36  
% 0.73/1.36  Increased maxweight to 17
% 0.73/1.36  
% 0.73/1.36  Starting Search:
% 0.73/1.36  
% 0.73/1.36  Resimplifying inuse:
% 0.73/1.36  Done
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  Bliksems!, er is een bewijs:
% 0.73/1.36  % SZS status Unsatisfiable
% 0.73/1.36  % SZS output start Refutation
% 0.73/1.36  
% 0.73/1.36  clause( 0, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), product( 
% 0.73/1.36    'e_1', X, Y ), product( 'e_2', X, Y ), product( 'e_3', X, Y ), product( 
% 0.73/1.36    'e_4', X, Y ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 1, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), product( 
% 0.73/1.36    X, 'e_1', Y ), product( X, 'e_2', Y ), product( X, 'e_3', Y ), product( X
% 0.73/1.36    , 'e_4', Y ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 2, [ 'group_element'( 'e_1' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 3, [ 'group_element'( 'e_2' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 4, [ 'group_element'( 'e_3' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 5, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 6, [ ~( equalish( 'e_1', 'e_2' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 8, [ ~( equalish( 'e_1', 'e_4' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 9, [ ~( equalish( 'e_2', 'e_1' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 11, [ ~( equalish( 'e_2', 'e_4' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 12, [ ~( equalish( 'e_3', 'e_1' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 13, [ ~( equalish( 'e_3', 'e_2' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 14, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 15, [ ~( equalish( 'e_4', 'e_1' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 16, [ ~( equalish( 'e_4', 'e_2' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 17, [ ~( equalish( 'e_4', 'e_3' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 18, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), product( 
% 0.73/1.36    X, Y, 'e_1' ), product( X, Y, 'e_2' ), product( X, Y, 'e_3' ), product( X
% 0.73/1.36    , Y, 'e_4' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 19, [ equalish( Z, T ), ~( product( X, Y, Z ) ), ~( product( X, Y, 
% 0.73/1.36    T ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 20, [ equalish( Y, T ), ~( product( X, Y, Z ) ), ~( product( X, T, 
% 0.73/1.36    Z ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 21, [ equalish( X, T ), ~( product( X, Y, Z ) ), ~( product( T, Y, 
% 0.73/1.36    Z ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 23, [ equalish( X, T ), ~( product( W, X, Y ) ), ~( product( W, T, 
% 0.73/1.36    U ) ), ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 24, [ equalish( Y, U ), ~( product( W, X, Y ) ), ~( product( W, T, 
% 0.73/1.36    U ) ), ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X, 
% 0.73/1.36    Z ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 36, [ equalish( X, Y ), ~( product( Z, Y, X ) ), ~( product( X, Z, 
% 0.73/1.36    Y ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 39, [ equalish( X, Y ), ~( product( Z, X, Y ) ), ~( product( Y, Z, 
% 0.73/1.36    X ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 42, [ equalish( X, Y ), ~( product( Y, X, X ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 43, [ equalish( X, Y ), ~( product( X, Y, Y ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 50, [ equalish( X, Y ), ~( product( X, X, Y ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 51, [ equalish( X, Y ), ~( product( Y, Y, X ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 57, [ ~( 'group_element'( X ) ), equalish( 'e_4', X ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 0.73/1.36     ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 60, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 0.73/1.36     ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 61, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 0.73/1.36    'e_1', 'e_4', X ), product( 'e_2', 'e_4', X ), product( 'e_3', 'e_4', X )
% 0.73/1.36     ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 66, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( X, 
% 0.73/1.36    'e_1', 'e_4' ), product( X, 'e_2', 'e_4' ), product( X, 'e_3', 'e_4' ) ]
% 0.73/1.36     )
% 0.73/1.36  .
% 0.73/1.36  clause( 71, [ equalish( X, Y ), ~( product( Y, X, Y ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 79, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 0.73/1.36    'e_4', X, 'e_1' ), product( 'e_4', X, 'e_2' ), product( 'e_4', X, 'e_3' )
% 0.73/1.36     ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 81, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 0.73/1.36    'e_1', X, 'e_4' ), product( 'e_2', X, 'e_4' ), product( 'e_3', X, 'e_4' )
% 0.73/1.36     ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 117, [ equalish( 'e_3', 'e_4' ), product( 'e_4', 'e_3', 'e_1' ), 
% 0.73/1.36    product( 'e_4', 'e_3', 'e_2' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 118, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_4', 'e_3', 'e_2'
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 130, [ product( 'e_4', 'e_3', 'e_1' ), ~( product( 'e_3', 'e_2', 
% 0.73/1.36    'e_4' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 190, [ ~( 'group_element'( X ) ), equalish( 'e_4', X ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), ~( product( 'e_3', X, 'e_4' ) ), product( 'e_4', 'e_2'
% 0.73/1.36    , X ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 191, [ equalish( 'e_4', 'e_3' ), product( 'e_4', 'e_1', 'e_3' ), 
% 0.73/1.36    product( 'e_4', 'e_2', 'e_3' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 192, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_4', 'e_2', 'e_3'
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 203, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), product( 'e_4', 'e_1', 
% 0.73/1.36    'e_3' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 204, [ product( 'e_4', 'e_1', 'e_3' ), ~( product( 'e_2', 'e_3', 
% 0.73/1.36    'e_4' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 222, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), ~( product( 'e_1', 
% 0.73/1.36    'e_3', 'e_4' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 314, [ equalish( 'e_3', 'e_4' ), product( 'e_3', 'e_1', 'e_4' ), 
% 0.73/1.36    product( 'e_3', 'e_2', 'e_4' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 315, [ product( 'e_3', 'e_1', 'e_4' ), product( 'e_3', 'e_2', 'e_4'
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 323, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_3', 'e_1', 'e_4'
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 334, [ ~( product( 'e_4', 'e_3', 'e_2' ) ), product( 'e_3', 'e_1', 
% 0.73/1.36    'e_4' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 495, [ equalish( 'e_3', 'e_4' ), product( 'e_1', 'e_3', 'e_4' ), 
% 0.73/1.36    product( 'e_2', 'e_3', 'e_4' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 566, [ product( 'e_1', 'e_3', 'e_4' ), product( 'e_2', 'e_3', 'e_4'
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 567, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_1', 'e_3', 'e_4'
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 579, [ equalish( 'e_3', 'e_2' ), ~( product( 'e_3', 'e_4', 'e_2' )
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 589, [ ~( product( 'e_3', 'e_4', 'e_2' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 592, [ equalish( 'e_2', 'e_4' ), product( 'e_1', 'e_4', 'e_2' ), 
% 0.73/1.36    product( 'e_2', 'e_4', 'e_2' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 609, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1' )
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 618, [ ~( product( 'e_3', 'e_4', 'e_1' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 621, [ equalish( 'e_1', 'e_4' ), product( 'e_1', 'e_4', 'e_1' ), 
% 0.73/1.36    product( 'e_2', 'e_4', 'e_1' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 767, [ product( 'e_1', 'e_4', 'e_1' ), product( 'e_2', 'e_4', 'e_1'
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 781, [ product( 'e_1', 'e_4', 'e_1' ), ~( product( 'e_4', 'e_1', 
% 0.73/1.36    'e_2' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 787, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ), 
% 0.73/1.36    product( 'e_1', 'e_4', 'e_1' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 852, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 863, [ product( 'e_1', 'e_4', 'e_2' ), product( 'e_2', 'e_4', 'e_2'
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 864, [ product( 'e_1', 'e_4', 'e_2' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 884, [ ~( product( 'e_4', 'e_2', 'e_1' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 892, [ equalish( X, 'e_2' ), ~( product( 'e_1', 'e_4', X ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 946, [ equalish( 'e_4', 'e_1' ), product( 'e_4', 'e_1', 'e_1' ), 
% 0.73/1.36    ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 979, [ product( 'e_4', 'e_1', 'e_1' ), ~( product( 'e_3', 'e_1', 
% 0.73/1.36    'e_4' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 993, [ product( 'e_4', 'e_1', 'e_1' ), product( 'e_4', 'e_3', 'e_1'
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 1023, [ equalish( 'e_1', 'e_4' ), ~( product( 'e_3', 'e_1', 'e_4' )
% 0.73/1.36     ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 1025, [ ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 1040, [ ~( product( 'e_4', 'e_3', 'e_2' ) ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 1050, [ equalish( 'e_2', 'e_4' ), product( 'e_4', 'e_1', 'e_2' ), 
% 0.73/1.36    product( 'e_4', 'e_2', 'e_2' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 1099, [ product( 'e_4', 'e_1', 'e_2' ), product( 'e_4', 'e_2', 
% 0.73/1.36    'e_2' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 1116, [ product( 'e_4', 'e_1', 'e_2' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 1117, [ product( 'e_1', 'e_4', 'e_1' ) ] )
% 0.73/1.36  .
% 0.73/1.36  clause( 1147, [] )
% 0.73/1.36  .
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  % SZS output end Refutation
% 0.73/1.36  found a proof!
% 0.73/1.36  
% 0.73/1.36  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.73/1.36  
% 0.73/1.36  initialclauses(
% 0.73/1.36  [ clause( 1149, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( 'e_1', X, Y ), product( 'e_2', X, Y ), product( 'e_3', X, Y ), 
% 0.73/1.36    product( 'e_4', X, Y ) ] )
% 0.73/1.36  , clause( 1150, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( X, 'e_1', Y ), product( X, 'e_2', Y ), product( X, 'e_3', Y ), 
% 0.73/1.36    product( X, 'e_4', Y ) ] )
% 0.73/1.36  , clause( 1151, [ 'group_element'( 'e_1' ) ] )
% 0.73/1.36  , clause( 1152, [ 'group_element'( 'e_2' ) ] )
% 0.73/1.36  , clause( 1153, [ 'group_element'( 'e_3' ) ] )
% 0.73/1.36  , clause( 1154, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  , clause( 1155, [ ~( equalish( 'e_1', 'e_2' ) ) ] )
% 0.73/1.36  , clause( 1156, [ ~( equalish( 'e_1', 'e_3' ) ) ] )
% 0.73/1.36  , clause( 1157, [ ~( equalish( 'e_1', 'e_4' ) ) ] )
% 0.73/1.36  , clause( 1158, [ ~( equalish( 'e_2', 'e_1' ) ) ] )
% 0.73/1.36  , clause( 1159, [ ~( equalish( 'e_2', 'e_3' ) ) ] )
% 0.73/1.36  , clause( 1160, [ ~( equalish( 'e_2', 'e_4' ) ) ] )
% 0.73/1.36  , clause( 1161, [ ~( equalish( 'e_3', 'e_1' ) ) ] )
% 0.73/1.36  , clause( 1162, [ ~( equalish( 'e_3', 'e_2' ) ) ] )
% 0.73/1.36  , clause( 1163, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 0.73/1.36  , clause( 1164, [ ~( equalish( 'e_4', 'e_1' ) ) ] )
% 0.73/1.36  , clause( 1165, [ ~( equalish( 'e_4', 'e_2' ) ) ] )
% 0.73/1.36  , clause( 1166, [ ~( equalish( 'e_4', 'e_3' ) ) ] )
% 0.73/1.36  , clause( 1167, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( X, Y, 'e_1' ), product( X, Y, 'e_2' ), product( X, Y, 'e_3' ), 
% 0.73/1.36    product( X, Y, 'e_4' ) ] )
% 0.73/1.36  , clause( 1168, [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), 
% 0.73/1.36    equalish( Z, T ) ] )
% 0.73/1.36  , clause( 1169, [ ~( product( X, Y, Z ) ), ~( product( X, T, Z ) ), 
% 0.73/1.36    equalish( Y, T ) ] )
% 0.73/1.36  , clause( 1170, [ ~( product( X, Y, Z ) ), ~( product( T, Y, Z ) ), 
% 0.73/1.36    equalish( X, T ) ] )
% 0.73/1.36  , clause( 1171, [ product( X, X, X ) ] )
% 0.73/1.36  , clause( 1172, [ ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ), ~( 
% 0.73/1.36    product( W, X, Y ) ), ~( product( W, T, U ) ), equalish( X, T ) ] )
% 0.73/1.36  , clause( 1173, [ ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ), ~( 
% 0.73/1.36    product( W, X, Y ) ), ~( product( W, T, U ) ), equalish( Y, U ) ] )
% 0.73/1.36  ] ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 0, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), product( 
% 0.73/1.36    'e_1', X, Y ), product( 'e_2', X, Y ), product( 'e_3', X, Y ), product( 
% 0.73/1.36    'e_4', X, Y ) ] )
% 0.73/1.36  , clause( 1149, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( 'e_1', X, Y ), product( 'e_2', X, Y ), product( 'e_3', X, Y ), 
% 0.73/1.36    product( 'e_4', X, Y ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.36     ), ==>( 1, 1 ), ==>( 2, 2 ), ==>( 3, 3 ), ==>( 4, 4 ), ==>( 5, 5 )] )
% 0.73/1.36     ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 1, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), product( 
% 0.73/1.36    X, 'e_1', Y ), product( X, 'e_2', Y ), product( X, 'e_3', Y ), product( X
% 0.73/1.36    , 'e_4', Y ) ] )
% 0.73/1.36  , clause( 1150, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( X, 'e_1', Y ), product( X, 'e_2', Y ), product( X, 'e_3', Y ), 
% 0.73/1.36    product( X, 'e_4', Y ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.36     ), ==>( 1, 1 ), ==>( 2, 2 ), ==>( 3, 3 ), ==>( 4, 4 ), ==>( 5, 5 )] )
% 0.73/1.36     ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 2, [ 'group_element'( 'e_1' ) ] )
% 0.73/1.36  , clause( 1151, [ 'group_element'( 'e_1' ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 3, [ 'group_element'( 'e_2' ) ] )
% 0.73/1.36  , clause( 1152, [ 'group_element'( 'e_2' ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 4, [ 'group_element'( 'e_3' ) ] )
% 0.73/1.36  , clause( 1153, [ 'group_element'( 'e_3' ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 5, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  , clause( 1154, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 6, [ ~( equalish( 'e_1', 'e_2' ) ) ] )
% 0.73/1.36  , clause( 1155, [ ~( equalish( 'e_1', 'e_2' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 8, [ ~( equalish( 'e_1', 'e_4' ) ) ] )
% 0.73/1.36  , clause( 1157, [ ~( equalish( 'e_1', 'e_4' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 9, [ ~( equalish( 'e_2', 'e_1' ) ) ] )
% 0.73/1.36  , clause( 1158, [ ~( equalish( 'e_2', 'e_1' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 11, [ ~( equalish( 'e_2', 'e_4' ) ) ] )
% 0.73/1.36  , clause( 1160, [ ~( equalish( 'e_2', 'e_4' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 12, [ ~( equalish( 'e_3', 'e_1' ) ) ] )
% 0.73/1.36  , clause( 1161, [ ~( equalish( 'e_3', 'e_1' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 13, [ ~( equalish( 'e_3', 'e_2' ) ) ] )
% 0.73/1.36  , clause( 1162, [ ~( equalish( 'e_3', 'e_2' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 14, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 0.73/1.36  , clause( 1163, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 15, [ ~( equalish( 'e_4', 'e_1' ) ) ] )
% 0.73/1.36  , clause( 1164, [ ~( equalish( 'e_4', 'e_1' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 16, [ ~( equalish( 'e_4', 'e_2' ) ) ] )
% 0.73/1.36  , clause( 1165, [ ~( equalish( 'e_4', 'e_2' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 17, [ ~( equalish( 'e_4', 'e_3' ) ) ] )
% 0.73/1.36  , clause( 1166, [ ~( equalish( 'e_4', 'e_3' ) ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 18, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), product( 
% 0.73/1.36    X, Y, 'e_1' ), product( X, Y, 'e_2' ), product( X, Y, 'e_3' ), product( X
% 0.73/1.36    , Y, 'e_4' ) ] )
% 0.73/1.36  , clause( 1167, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( X, Y, 'e_1' ), product( X, Y, 'e_2' ), product( X, Y, 'e_3' ), 
% 0.73/1.36    product( X, Y, 'e_4' ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.36     ), ==>( 1, 1 ), ==>( 2, 2 ), ==>( 3, 3 ), ==>( 4, 4 ), ==>( 5, 5 )] )
% 0.73/1.36     ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 19, [ equalish( Z, T ), ~( product( X, Y, Z ) ), ~( product( X, Y, 
% 0.73/1.36    T ) ) ] )
% 0.73/1.36  , clause( 1168, [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), 
% 0.73/1.36    equalish( Z, T ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.73/1.36    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 2 ), ==>( 2, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 20, [ equalish( Y, T ), ~( product( X, Y, Z ) ), ~( product( X, T, 
% 0.73/1.36    Z ) ) ] )
% 0.73/1.36  , clause( 1169, [ ~( product( X, Y, Z ) ), ~( product( X, T, Z ) ), 
% 0.73/1.36    equalish( Y, T ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.73/1.36    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 2 ), ==>( 2, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 21, [ equalish( X, T ), ~( product( X, Y, Z ) ), ~( product( T, Y, 
% 0.73/1.36    Z ) ) ] )
% 0.73/1.36  , clause( 1170, [ ~( product( X, Y, Z ) ), ~( product( T, Y, Z ) ), 
% 0.73/1.36    equalish( X, T ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.73/1.36    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 2 ), ==>( 2, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  , clause( 1171, [ product( X, X, X ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 23, [ equalish( X, T ), ~( product( W, X, Y ) ), ~( product( W, T, 
% 0.73/1.36    U ) ), ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ) ] )
% 0.73/1.36  , clause( 1172, [ ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ), ~( 
% 0.73/1.36    product( W, X, Y ) ), ~( product( W, T, U ) ), equalish( X, T ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.73/1.36    , U ), :=( W, W )] ), permutation( 0, [ ==>( 0, 3 ), ==>( 1, 4 ), ==>( 2
% 0.73/1.36    , 1 ), ==>( 3, 2 ), ==>( 4, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 24, [ equalish( Y, U ), ~( product( W, X, Y ) ), ~( product( W, T, 
% 0.73/1.36    U ) ), ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ) ] )
% 0.73/1.36  , clause( 1173, [ ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ), ~( 
% 0.73/1.36    product( W, X, Y ) ), ~( product( W, T, U ) ), equalish( Y, U ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.73/1.36    , U ), :=( W, W )] ), permutation( 0, [ ==>( 0, 3 ), ==>( 1, 4 ), ==>( 2
% 0.73/1.36    , 1 ), ==>( 3, 2 ), ==>( 4, 0 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  factor(
% 0.73/1.36  clause( 1269, [ equalish( X, Y ), ~( product( Y, X, Z ) ), ~( product( Y, Y
% 0.73/1.36    , Y ) ), ~( product( X, Z, Y ) ) ] )
% 0.73/1.36  , clause( 23, [ equalish( X, T ), ~( product( W, X, Y ) ), ~( product( W, T
% 0.73/1.36    , U ) ), ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ) ] )
% 0.73/1.36  , 2, 4, substitution( 0, [ :=( X, X ), :=( Y, Z ), :=( Z, Y ), :=( T, Y ), 
% 0.73/1.36    :=( U, Y ), :=( W, Y )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1277, [ equalish( X, Y ), ~( product( Y, X, Z ) ), ~( product( X, Z
% 0.73/1.36    , Y ) ) ] )
% 0.73/1.36  , clause( 1269, [ equalish( X, Y ), ~( product( Y, X, Z ) ), ~( product( Y
% 0.73/1.36    , Y, Y ) ), ~( product( X, Z, Y ) ) ] )
% 0.73/1.36  , 2, clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.73/1.36    substitution( 1, [ :=( X, Y )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X, 
% 0.73/1.36    Z ) ) ] )
% 0.73/1.36  , clause( 1277, [ equalish( X, Y ), ~( product( Y, X, Z ) ), ~( product( X
% 0.73/1.36    , Z, Y ) ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.73/1.36    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 2 ), ==>( 2, 1 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  factor(
% 0.73/1.36  clause( 1280, [ equalish( X, Y ), ~( product( X, X, X ) ), ~( product( X, Z
% 0.73/1.36    , Y ) ), ~( product( Z, Y, X ) ) ] )
% 0.73/1.36  , clause( 24, [ equalish( Y, U ), ~( product( W, X, Y ) ), ~( product( W, T
% 0.73/1.36    , U ) ), ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ) ] )
% 0.73/1.36  , 1, 3, substitution( 0, [ :=( X, X ), :=( Y, X ), :=( Z, X ), :=( T, Z ), 
% 0.73/1.36    :=( U, Y ), :=( W, X )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1287, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Z, Y
% 0.73/1.36    , X ) ) ] )
% 0.73/1.36  , clause( 1280, [ equalish( X, Y ), ~( product( X, X, X ) ), ~( product( X
% 0.73/1.36    , Z, Y ) ), ~( product( Z, Y, X ) ) ] )
% 0.73/1.36  , 1, clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.73/1.36    substitution( 1, [ :=( X, X )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 36, [ equalish( X, Y ), ~( product( Z, Y, X ) ), ~( product( X, Z, 
% 0.73/1.36    Y ) ) ] )
% 0.73/1.36  , clause( 1287, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Z
% 0.73/1.36    , Y, X ) ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.73/1.36    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 2 ), ==>( 2, 1 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  factor(
% 0.73/1.36  clause( 1293, [ equalish( X, Y ), ~( product( Y, Z, X ) ), ~( product( Y, Y
% 0.73/1.36    , Y ) ), ~( product( Z, X, Y ) ) ] )
% 0.73/1.36  , clause( 24, [ equalish( Y, U ), ~( product( W, X, Y ) ), ~( product( W, T
% 0.73/1.36    , U ) ), ~( product( X, Y, Z ) ), ~( product( T, U, Z ) ) ] )
% 0.73/1.36  , 2, 4, substitution( 0, [ :=( X, Z ), :=( Y, X ), :=( Z, Y ), :=( T, Y ), 
% 0.73/1.36    :=( U, Y ), :=( W, Y )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1301, [ equalish( X, Y ), ~( product( Y, Z, X ) ), ~( product( Z, X
% 0.73/1.36    , Y ) ) ] )
% 0.73/1.36  , clause( 1293, [ equalish( X, Y ), ~( product( Y, Z, X ) ), ~( product( Y
% 0.73/1.36    , Y, Y ) ), ~( product( Z, X, Y ) ) ] )
% 0.73/1.36  , 2, clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.73/1.36    substitution( 1, [ :=( X, Y )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 39, [ equalish( X, Y ), ~( product( Z, X, Y ) ), ~( product( Y, Z, 
% 0.73/1.36    X ) ) ] )
% 0.73/1.36  , clause( 1301, [ equalish( X, Y ), ~( product( Y, Z, X ) ), ~( product( Z
% 0.73/1.36    , X, Y ) ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.73/1.36    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 2 ), ==>( 2, 1 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1303, [ equalish( X, Y ), ~( product( Y, X, X ) ) ] )
% 0.73/1.36  , clause( 21, [ equalish( X, T ), ~( product( X, Y, Z ) ), ~( product( T, Y
% 0.73/1.36    , Z ) ) ] )
% 0.73/1.36  , 1, clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X ), :=( Y, X ), :=( Z, X ), :=( T, Y )] ), 
% 0.73/1.36    substitution( 1, [ :=( X, X )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 42, [ equalish( X, Y ), ~( product( Y, X, X ) ) ] )
% 0.73/1.36  , clause( 1303, [ equalish( X, Y ), ~( product( Y, X, X ) ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.36     ), ==>( 1, 1 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1306, [ equalish( X, Y ), ~( product( X, Y, Y ) ) ] )
% 0.73/1.36  , clause( 21, [ equalish( X, T ), ~( product( X, Y, Z ) ), ~( product( T, Y
% 0.73/1.36    , Z ) ) ] )
% 0.73/1.36  , 2, clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Y ), :=( T, Y )] ), 
% 0.73/1.36    substitution( 1, [ :=( X, Y )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 43, [ equalish( X, Y ), ~( product( X, Y, Y ) ) ] )
% 0.73/1.36  , clause( 1306, [ equalish( X, Y ), ~( product( X, Y, Y ) ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.36     ), ==>( 1, 1 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1307, [ equalish( X, Y ), ~( product( X, X, Y ) ) ] )
% 0.73/1.36  , clause( 19, [ equalish( Z, T ), ~( product( X, Y, Z ) ), ~( product( X, Y
% 0.73/1.36    , T ) ) ] )
% 0.73/1.36  , 1, clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X ), :=( Y, X ), :=( Z, X ), :=( T, Y )] ), 
% 0.73/1.36    substitution( 1, [ :=( X, X )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 50, [ equalish( X, Y ), ~( product( X, X, Y ) ) ] )
% 0.73/1.36  , clause( 1307, [ equalish( X, Y ), ~( product( X, X, Y ) ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.36     ), ==>( 1, 1 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1310, [ equalish( X, Y ), ~( product( Y, Y, X ) ) ] )
% 0.73/1.36  , clause( 19, [ equalish( Z, T ), ~( product( X, Y, Z ) ), ~( product( X, Y
% 0.73/1.36    , T ) ) ] )
% 0.73/1.36  , 2, clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, Y ), :=( Y, Y ), :=( Z, X ), :=( T, Y )] ), 
% 0.73/1.36    substitution( 1, [ :=( X, Y )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 51, [ equalish( X, Y ), ~( product( Y, Y, X ) ) ] )
% 0.73/1.36  , clause( 1310, [ equalish( X, Y ), ~( product( Y, Y, X ) ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.36     ), ==>( 1, 1 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1314, [ equalish( 'e_4', X ), ~( 'group_element'( 'e_4' ) ), ~( 
% 0.73/1.36    'group_element'( X ) ), product( 'e_4', 'e_1', X ), product( 'e_4', 'e_2'
% 0.73/1.36    , X ), product( 'e_4', 'e_3', X ) ] )
% 0.73/1.36  , clause( 50, [ equalish( X, Y ), ~( product( X, X, Y ) ) ] )
% 0.73/1.36  , 1, clause( 1, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( X, 'e_1', Y ), product( X, 'e_2', Y ), product( X, 'e_3', Y ), 
% 0.73/1.36    product( X, 'e_4', Y ) ] )
% 0.73/1.36  , 5, substitution( 0, [ :=( X, 'e_4' ), :=( Y, X )] ), substitution( 1, [ 
% 0.73/1.36    :=( X, 'e_4' ), :=( Y, X )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1320, [ equalish( 'e_4', X ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1314, [ equalish( 'e_4', X ), ~( 'group_element'( 'e_4' ) ), ~( 
% 0.73/1.36    'group_element'( X ) ), product( 'e_4', 'e_1', X ), product( 'e_4', 'e_2'
% 0.73/1.36    , X ), product( 'e_4', 'e_3', X ) ] )
% 0.73/1.36  , 1, clause( 5, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X )] ), substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 57, [ ~( 'group_element'( X ) ), equalish( 'e_4', X ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1320, [ equalish( 'e_4', X ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 0.73/1.36     ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 
% 0.73/1.36    0 ), ==>( 2, 2 ), ==>( 3, 3 ), ==>( 4, 4 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1324, [ equalish( X, 'e_4' ), ~( 'group_element'( 'e_4' ) ), ~( 
% 0.73/1.36    'group_element'( X ) ), product( 'e_4', 'e_1', X ), product( 'e_4', 'e_2'
% 0.73/1.36    , X ), product( 'e_4', 'e_3', X ) ] )
% 0.73/1.36  , clause( 51, [ equalish( X, Y ), ~( product( Y, Y, X ) ) ] )
% 0.73/1.36  , 1, clause( 1, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( X, 'e_1', Y ), product( X, 'e_2', Y ), product( X, 'e_3', Y ), 
% 0.73/1.36    product( X, 'e_4', Y ) ] )
% 0.73/1.36  , 5, substitution( 0, [ :=( X, X ), :=( Y, 'e_4' )] ), substitution( 1, [ 
% 0.73/1.36    :=( X, 'e_4' ), :=( Y, X )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1330, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1324, [ equalish( X, 'e_4' ), ~( 'group_element'( 'e_4' ) ), ~( 
% 0.73/1.36    'group_element'( X ) ), product( 'e_4', 'e_1', X ), product( 'e_4', 'e_2'
% 0.73/1.36    , X ), product( 'e_4', 'e_3', X ) ] )
% 0.73/1.36  , 1, clause( 5, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X )] ), substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 60, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1330, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 0.73/1.36     ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 
% 0.73/1.36    0 ), ==>( 2, 2 ), ==>( 3, 3 ), ==>( 4, 4 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1334, [ equalish( X, 'e_4' ), ~( 'group_element'( 'e_4' ) ), ~( 
% 0.73/1.36    'group_element'( X ) ), product( 'e_1', 'e_4', X ), product( 'e_2', 'e_4'
% 0.73/1.36    , X ), product( 'e_3', 'e_4', X ) ] )
% 0.73/1.36  , clause( 51, [ equalish( X, Y ), ~( product( Y, Y, X ) ) ] )
% 0.73/1.36  , 1, clause( 0, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( 'e_1', X, Y ), product( 'e_2', X, Y ), product( 'e_3', X, Y ), 
% 0.73/1.36    product( 'e_4', X, Y ) ] )
% 0.73/1.36  , 5, substitution( 0, [ :=( X, X ), :=( Y, 'e_4' )] ), substitution( 1, [ 
% 0.73/1.36    :=( X, 'e_4' ), :=( Y, X )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1340, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_1', 'e_4', X ), product( 'e_2', 'e_4', X ), product( 'e_3', 'e_4', X )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1334, [ equalish( X, 'e_4' ), ~( 'group_element'( 'e_4' ) ), ~( 
% 0.73/1.36    'group_element'( X ) ), product( 'e_1', 'e_4', X ), product( 'e_2', 'e_4'
% 0.73/1.36    , X ), product( 'e_3', 'e_4', X ) ] )
% 0.73/1.36  , 1, clause( 5, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X )] ), substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 61, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 0.73/1.36    'e_1', 'e_4', X ), product( 'e_2', 'e_4', X ), product( 'e_3', 'e_4', X )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1340, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_1', 'e_4', X ), product( 'e_2', 'e_4', X ), product( 'e_3', 'e_4', X )
% 0.73/1.36     ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 
% 0.73/1.36    0 ), ==>( 2, 2 ), ==>( 3, 3 ), ==>( 4, 4 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1344, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), ~( 
% 0.73/1.36    'group_element'( 'e_4' ) ), product( X, 'e_1', 'e_4' ), product( X, 'e_2'
% 0.73/1.36    , 'e_4' ), product( X, 'e_3', 'e_4' ) ] )
% 0.73/1.36  , clause( 43, [ equalish( X, Y ), ~( product( X, Y, Y ) ) ] )
% 0.73/1.36  , 1, clause( 1, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( X, 'e_1', Y ), product( X, 'e_2', Y ), product( X, 'e_3', Y ), 
% 0.73/1.36    product( X, 'e_4', Y ) ] )
% 0.73/1.36  , 5, substitution( 0, [ :=( X, X ), :=( Y, 'e_4' )] ), substitution( 1, [ 
% 0.73/1.36    :=( X, X ), :=( Y, 'e_4' )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1350, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( X
% 0.73/1.36    , 'e_1', 'e_4' ), product( X, 'e_2', 'e_4' ), product( X, 'e_3', 'e_4' )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1344, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), ~( 
% 0.73/1.36    'group_element'( 'e_4' ) ), product( X, 'e_1', 'e_4' ), product( X, 'e_2'
% 0.73/1.36    , 'e_4' ), product( X, 'e_3', 'e_4' ) ] )
% 0.73/1.36  , 2, clause( 5, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X )] ), substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 66, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( X, 
% 0.73/1.36    'e_1', 'e_4' ), product( X, 'e_2', 'e_4' ), product( X, 'e_3', 'e_4' ) ]
% 0.73/1.36     )
% 0.73/1.36  , clause( 1350, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    X, 'e_1', 'e_4' ), product( X, 'e_2', 'e_4' ), product( X, 'e_3', 'e_4' )
% 0.73/1.36     ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 
% 0.73/1.36    0 ), ==>( 2, 2 ), ==>( 3, 3 ), ==>( 4, 4 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1352, [ equalish( X, Y ), ~( product( Y, X, Y ) ) ] )
% 0.73/1.36  , clause( 20, [ equalish( Y, T ), ~( product( X, Y, Z ) ), ~( product( X, T
% 0.73/1.36    , Z ) ) ] )
% 0.73/1.36  , 2, clause( 22, [ product( X, X, X ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, Y ), :=( Y, X ), :=( Z, Y ), :=( T, Y )] ), 
% 0.73/1.36    substitution( 1, [ :=( X, Y )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 71, [ equalish( X, Y ), ~( product( Y, X, Y ) ) ] )
% 0.73/1.36  , clause( 1352, [ equalish( X, Y ), ~( product( Y, X, Y ) ) ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.73/1.36     ), ==>( 1, 1 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1356, [ equalish( X, 'e_4' ), ~( 'group_element'( 'e_4' ) ), ~( 
% 0.73/1.36    'group_element'( X ) ), product( 'e_4', X, 'e_1' ), product( 'e_4', X, 
% 0.73/1.36    'e_2' ), product( 'e_4', X, 'e_3' ) ] )
% 0.73/1.36  , clause( 71, [ equalish( X, Y ), ~( product( Y, X, Y ) ) ] )
% 0.73/1.36  , 1, clause( 18, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( X, Y, 'e_1' ), product( X, Y, 'e_2' ), product( X, Y, 'e_3' ), 
% 0.73/1.36    product( X, Y, 'e_4' ) ] )
% 0.73/1.36  , 5, substitution( 0, [ :=( X, X ), :=( Y, 'e_4' )] ), substitution( 1, [ 
% 0.73/1.36    :=( X, 'e_4' ), :=( Y, X )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1362, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_4', X, 'e_1' ), product( 'e_4', X, 'e_2' ), product( 'e_4', X, 'e_3' )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1356, [ equalish( X, 'e_4' ), ~( 'group_element'( 'e_4' ) ), ~( 
% 0.73/1.36    'group_element'( X ) ), product( 'e_4', X, 'e_1' ), product( 'e_4', X, 
% 0.73/1.36    'e_2' ), product( 'e_4', X, 'e_3' ) ] )
% 0.73/1.36  , 1, clause( 5, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X )] ), substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 79, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 0.73/1.36    'e_4', X, 'e_1' ), product( 'e_4', X, 'e_2' ), product( 'e_4', X, 'e_3' )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1362, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_4', X, 'e_1' ), product( 'e_4', X, 'e_2' ), product( 'e_4', X, 'e_3' )
% 0.73/1.36     ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 
% 0.73/1.36    0 ), ==>( 2, 2 ), ==>( 3, 3 ), ==>( 4, 4 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1366, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), ~( 
% 0.73/1.36    'group_element'( 'e_4' ) ), product( 'e_1', X, 'e_4' ), product( 'e_2', X
% 0.73/1.36    , 'e_4' ), product( 'e_3', X, 'e_4' ) ] )
% 0.73/1.36  , clause( 71, [ equalish( X, Y ), ~( product( Y, X, Y ) ) ] )
% 0.73/1.36  , 1, clause( 0, [ ~( 'group_element'( X ) ), ~( 'group_element'( Y ) ), 
% 0.73/1.36    product( 'e_1', X, Y ), product( 'e_2', X, Y ), product( 'e_3', X, Y ), 
% 0.73/1.36    product( 'e_4', X, Y ) ] )
% 0.73/1.36  , 5, substitution( 0, [ :=( X, X ), :=( Y, 'e_4' )] ), substitution( 1, [ 
% 0.73/1.36    :=( X, X ), :=( Y, 'e_4' )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1372, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_1', X, 'e_4' ), product( 'e_2', X, 'e_4' ), product( 'e_3', X, 'e_4' )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1366, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), ~( 
% 0.73/1.36    'group_element'( 'e_4' ) ), product( 'e_1', X, 'e_4' ), product( 'e_2', X
% 0.73/1.36    , 'e_4' ), product( 'e_3', X, 'e_4' ) ] )
% 0.73/1.36  , 2, clause( 5, [ 'group_element'( 'e_4' ) ] )
% 0.73/1.36  , 0, substitution( 0, [ :=( X, X )] ), substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 81, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 0.73/1.36    'e_1', X, 'e_4' ), product( 'e_2', X, 'e_4' ), product( 'e_3', X, 'e_4' )
% 0.73/1.36     ] )
% 0.73/1.36  , clause( 1372, [ equalish( X, 'e_4' ), ~( 'group_element'( X ) ), product( 
% 0.73/1.36    'e_1', X, 'e_4' ), product( 'e_2', X, 'e_4' ), product( 'e_3', X, 'e_4' )
% 0.73/1.36     ] )
% 0.73/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 
% 0.73/1.36    0 ), ==>( 2, 2 ), ==>( 3, 3 ), ==>( 4, 4 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1375, [ equalish( 'e_3', 'e_4' ), ~( 'group_element'( 'e_3' ) ), 
% 0.73/1.36    equalish( 'e_3', 'e_4' ), product( 'e_4', 'e_3', 'e_1' ), product( 'e_4'
% 0.73/1.36    , 'e_3', 'e_2' ) ] )
% 0.73/1.36  , clause( 42, [ equalish( X, Y ), ~( product( Y, X, X ) ) ] )
% 0.73/1.36  , 1, clause( 79, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 0.73/1.36    'e_4', X, 'e_1' ), product( 'e_4', X, 'e_2' ), product( 'e_4', X, 'e_3' )
% 0.73/1.36     ] )
% 0.73/1.36  , 4, substitution( 0, [ :=( X, 'e_3' ), :=( Y, 'e_4' )] ), substitution( 1
% 0.73/1.36    , [ :=( X, 'e_3' )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1379, [ equalish( 'e_3', 'e_4' ), equalish( 'e_3', 'e_4' ), product( 
% 0.73/1.36    'e_4', 'e_3', 'e_1' ), product( 'e_4', 'e_3', 'e_2' ) ] )
% 0.73/1.36  , clause( 1375, [ equalish( 'e_3', 'e_4' ), ~( 'group_element'( 'e_3' ) ), 
% 0.73/1.36    equalish( 'e_3', 'e_4' ), product( 'e_4', 'e_3', 'e_1' ), product( 'e_4'
% 0.73/1.36    , 'e_3', 'e_2' ) ] )
% 0.73/1.36  , 1, clause( 4, [ 'group_element'( 'e_3' ) ] )
% 0.73/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  factor(
% 0.73/1.36  clause( 1380, [ equalish( 'e_3', 'e_4' ), product( 'e_4', 'e_3', 'e_1' ), 
% 0.73/1.36    product( 'e_4', 'e_3', 'e_2' ) ] )
% 0.73/1.36  , clause( 1379, [ equalish( 'e_3', 'e_4' ), equalish( 'e_3', 'e_4' ), 
% 0.73/1.36    product( 'e_4', 'e_3', 'e_1' ), product( 'e_4', 'e_3', 'e_2' ) ] )
% 0.73/1.36  , 0, 1, substitution( 0, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 117, [ equalish( 'e_3', 'e_4' ), product( 'e_4', 'e_3', 'e_1' ), 
% 0.73/1.36    product( 'e_4', 'e_3', 'e_2' ) ] )
% 0.73/1.36  , clause( 1380, [ equalish( 'e_3', 'e_4' ), product( 'e_4', 'e_3', 'e_1' )
% 0.73/1.36    , product( 'e_4', 'e_3', 'e_2' ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 0.73/1.36    , 2 )] ) ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1381, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_4', 'e_3', 
% 0.73/1.36    'e_2' ) ] )
% 0.73/1.36  , clause( 14, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 0.73/1.36  , 0, clause( 117, [ equalish( 'e_3', 'e_4' ), product( 'e_4', 'e_3', 'e_1'
% 0.73/1.36     ), product( 'e_4', 'e_3', 'e_2' ) ] )
% 0.73/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 118, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_4', 'e_3', 'e_2'
% 0.73/1.36     ) ] )
% 0.73/1.36  , clause( 1381, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_4', 'e_3', 
% 0.73/1.36    'e_2' ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 0.73/1.36     ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1385, [ equalish( 'e_3', 'e_4' ), ~( product( 'e_3', 'e_2', 'e_4' )
% 0.73/1.36     ), product( 'e_4', 'e_3', 'e_1' ) ] )
% 0.73/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 0.73/1.36    , Z ) ) ] )
% 0.73/1.36  , 2, clause( 118, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_4', 'e_3', 
% 0.73/1.36    'e_2' ) ] )
% 0.73/1.36  , 1, substitution( 0, [ :=( X, 'e_3' ), :=( Y, 'e_4' ), :=( Z, 'e_2' )] ), 
% 0.73/1.36    substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1387, [ ~( product( 'e_3', 'e_2', 'e_4' ) ), product( 'e_4', 'e_3'
% 0.73/1.36    , 'e_1' ) ] )
% 0.73/1.36  , clause( 14, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 0.73/1.36  , 0, clause( 1385, [ equalish( 'e_3', 'e_4' ), ~( product( 'e_3', 'e_2', 
% 0.73/1.36    'e_4' ) ), product( 'e_4', 'e_3', 'e_1' ) ] )
% 0.73/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  subsumption(
% 0.73/1.36  clause( 130, [ product( 'e_4', 'e_3', 'e_1' ), ~( product( 'e_3', 'e_2', 
% 0.73/1.36    'e_4' ) ) ] )
% 0.73/1.36  , clause( 1387, [ ~( product( 'e_3', 'e_2', 'e_4' ) ), product( 'e_4', 
% 0.73/1.36    'e_3', 'e_1' ) ] )
% 0.73/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] )
% 0.73/1.36     ).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1393, [ equalish( 'e_3', 'e_4' ), ~( product( 'e_3', X, 'e_4' ) ), 
% 0.73/1.36    ~( 'group_element'( X ) ), equalish( 'e_4', X ), product( 'e_4', 'e_1', X
% 0.73/1.36     ), product( 'e_4', 'e_2', X ) ] )
% 0.73/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 0.73/1.36    , Z ) ) ] )
% 0.73/1.36  , 2, clause( 57, [ ~( 'group_element'( X ) ), equalish( 'e_4', X ), product( 
% 0.73/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 0.73/1.36     ] )
% 0.73/1.36  , 4, substitution( 0, [ :=( X, 'e_3' ), :=( Y, 'e_4' ), :=( Z, X )] ), 
% 0.73/1.36    substitution( 1, [ :=( X, X )] )).
% 0.73/1.36  
% 0.73/1.36  
% 0.73/1.36  resolution(
% 0.73/1.36  clause( 1397, [ ~( product( 'e_3', X, 'e_4' ) ), ~( 'group_element'( X ) )
% 0.73/1.36    , equalish( 'e_4', X ), product( 'e_4', 'e_1', X ), product( 'e_4', 'e_2'
% 0.73/1.36    , X ) ] )
% 0.73/1.36  , clause( 14, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 0.73/1.36  , 0, clause( 1393, [ equalish( 'e_3', 'e_4' ), ~( product( 'e_3', X, 'e_4'
% 1.00/1.36     ) ), ~( 'group_element'( X ) ), equalish( 'e_4', X ), product( 'e_4', 
% 1.00/1.36    'e_1', X ), product( 'e_4', 'e_2', X ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [ :=( X, X )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 190, [ ~( 'group_element'( X ) ), equalish( 'e_4', X ), product( 
% 1.00/1.36    'e_4', 'e_1', X ), ~( product( 'e_3', X, 'e_4' ) ), product( 'e_4', 'e_2'
% 1.00/1.36    , X ) ] )
% 1.00/1.36  , clause( 1397, [ ~( product( 'e_3', X, 'e_4' ) ), ~( 'group_element'( X )
% 1.00/1.36     ), equalish( 'e_4', X ), product( 'e_4', 'e_1', X ), product( 'e_4', 
% 1.00/1.36    'e_2', X ) ] )
% 1.00/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 3 ), ==>( 1, 
% 1.00/1.36    0 ), ==>( 2, 1 ), ==>( 3, 2 ), ==>( 4, 4 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1400, [ equalish( 'e_4', 'e_3' ), ~( 'group_element'( 'e_3' ) ), 
% 1.00/1.36    equalish( 'e_4', 'e_3' ), product( 'e_4', 'e_1', 'e_3' ), product( 'e_4'
% 1.00/1.36    , 'e_2', 'e_3' ) ] )
% 1.00/1.36  , clause( 43, [ equalish( X, Y ), ~( product( X, Y, Y ) ) ] )
% 1.00/1.36  , 1, clause( 57, [ ~( 'group_element'( X ) ), equalish( 'e_4', X ), product( 
% 1.00/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 1.00/1.36     ] )
% 1.00/1.36  , 4, substitution( 0, [ :=( X, 'e_4' ), :=( Y, 'e_3' )] ), substitution( 1
% 1.00/1.36    , [ :=( X, 'e_3' )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1404, [ equalish( 'e_4', 'e_3' ), equalish( 'e_4', 'e_3' ), product( 
% 1.00/1.36    'e_4', 'e_1', 'e_3' ), product( 'e_4', 'e_2', 'e_3' ) ] )
% 1.00/1.36  , clause( 1400, [ equalish( 'e_4', 'e_3' ), ~( 'group_element'( 'e_3' ) ), 
% 1.00/1.36    equalish( 'e_4', 'e_3' ), product( 'e_4', 'e_1', 'e_3' ), product( 'e_4'
% 1.00/1.36    , 'e_2', 'e_3' ) ] )
% 1.00/1.36  , 1, clause( 4, [ 'group_element'( 'e_3' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  factor(
% 1.00/1.36  clause( 1405, [ equalish( 'e_4', 'e_3' ), product( 'e_4', 'e_1', 'e_3' ), 
% 1.00/1.36    product( 'e_4', 'e_2', 'e_3' ) ] )
% 1.00/1.36  , clause( 1404, [ equalish( 'e_4', 'e_3' ), equalish( 'e_4', 'e_3' ), 
% 1.00/1.36    product( 'e_4', 'e_1', 'e_3' ), product( 'e_4', 'e_2', 'e_3' ) ] )
% 1.00/1.36  , 0, 1, substitution( 0, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 191, [ equalish( 'e_4', 'e_3' ), product( 'e_4', 'e_1', 'e_3' ), 
% 1.00/1.36    product( 'e_4', 'e_2', 'e_3' ) ] )
% 1.00/1.36  , clause( 1405, [ equalish( 'e_4', 'e_3' ), product( 'e_4', 'e_1', 'e_3' )
% 1.00/1.36    , product( 'e_4', 'e_2', 'e_3' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 1.00/1.36    , 2 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1406, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_4', 'e_2', 
% 1.00/1.36    'e_3' ) ] )
% 1.00/1.36  , clause( 17, [ ~( equalish( 'e_4', 'e_3' ) ) ] )
% 1.00/1.36  , 0, clause( 191, [ equalish( 'e_4', 'e_3' ), product( 'e_4', 'e_1', 'e_3'
% 1.00/1.36     ), product( 'e_4', 'e_2', 'e_3' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 192, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_4', 'e_2', 'e_3'
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1406, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_4', 'e_2', 
% 1.00/1.36    'e_3' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1408, [ equalish( 'e_4', 'e_3' ), ~( product( 'e_3', 'e_4', 'e_2' )
% 1.00/1.36     ), product( 'e_4', 'e_1', 'e_3' ) ] )
% 1.00/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 1.00/1.36    , Z ) ) ] )
% 1.00/1.36  , 1, clause( 192, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_4', 'e_2', 
% 1.00/1.36    'e_3' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_4' ), :=( Y, 'e_3' ), :=( Z, 'e_2' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1412, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), product( 'e_4', 'e_1'
% 1.00/1.36    , 'e_3' ) ] )
% 1.00/1.36  , clause( 17, [ ~( equalish( 'e_4', 'e_3' ) ) ] )
% 1.00/1.36  , 0, clause( 1408, [ equalish( 'e_4', 'e_3' ), ~( product( 'e_3', 'e_4', 
% 1.00/1.36    'e_2' ) ), product( 'e_4', 'e_1', 'e_3' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 203, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), product( 'e_4', 'e_1', 
% 1.00/1.36    'e_3' ) ] )
% 1.00/1.36  , clause( 1412, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), product( 'e_4', 
% 1.00/1.36    'e_1', 'e_3' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1416, [ equalish( 'e_2', 'e_4' ), ~( product( 'e_2', 'e_3', 'e_4' )
% 1.00/1.36     ), product( 'e_4', 'e_1', 'e_3' ) ] )
% 1.00/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 1.00/1.36    , Z ) ) ] )
% 1.00/1.36  , 2, clause( 192, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_4', 'e_2', 
% 1.00/1.36    'e_3' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_2' ), :=( Y, 'e_4' ), :=( Z, 'e_3' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1417, [ ~( product( 'e_2', 'e_3', 'e_4' ) ), product( 'e_4', 'e_1'
% 1.00/1.36    , 'e_3' ) ] )
% 1.00/1.36  , clause( 11, [ ~( equalish( 'e_2', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 1416, [ equalish( 'e_2', 'e_4' ), ~( product( 'e_2', 'e_3', 
% 1.00/1.36    'e_4' ) ), product( 'e_4', 'e_1', 'e_3' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 204, [ product( 'e_4', 'e_1', 'e_3' ), ~( product( 'e_2', 'e_3', 
% 1.00/1.36    'e_4' ) ) ] )
% 1.00/1.36  , clause( 1417, [ ~( product( 'e_2', 'e_3', 'e_4' ) ), product( 'e_4', 
% 1.00/1.36    'e_1', 'e_3' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1419, [ equalish( 'e_1', 'e_4' ), ~( product( 'e_1', 'e_3', 'e_4' )
% 1.00/1.36     ), ~( product( 'e_3', 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 1.00/1.36    , Z ) ) ] )
% 1.00/1.36  , 2, clause( 203, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), product( 'e_4', 
% 1.00/1.36    'e_1', 'e_3' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_1' ), :=( Y, 'e_4' ), :=( Z, 'e_3' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1420, [ ~( product( 'e_1', 'e_3', 'e_4' ) ), ~( product( 'e_3', 
% 1.00/1.36    'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , clause( 8, [ ~( equalish( 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 1419, [ equalish( 'e_1', 'e_4' ), ~( product( 'e_1', 'e_3', 
% 1.00/1.36    'e_4' ) ), ~( product( 'e_3', 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 222, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), ~( product( 'e_1', 
% 1.00/1.36    'e_3', 'e_4' ) ) ] )
% 1.00/1.36  , clause( 1420, [ ~( product( 'e_1', 'e_3', 'e_4' ) ), ~( product( 'e_3', 
% 1.00/1.36    'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1423, [ equalish( 'e_3', 'e_4' ), ~( 'group_element'( 'e_3' ) ), 
% 1.00/1.36    equalish( 'e_3', 'e_4' ), product( 'e_3', 'e_1', 'e_4' ), product( 'e_3'
% 1.00/1.36    , 'e_2', 'e_4' ) ] )
% 1.00/1.36  , clause( 50, [ equalish( X, Y ), ~( product( X, X, Y ) ) ] )
% 1.00/1.36  , 1, clause( 66, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 1.00/1.36    X, 'e_1', 'e_4' ), product( X, 'e_2', 'e_4' ), product( X, 'e_3', 'e_4' )
% 1.00/1.36     ] )
% 1.00/1.36  , 4, substitution( 0, [ :=( X, 'e_3' ), :=( Y, 'e_4' )] ), substitution( 1
% 1.00/1.36    , [ :=( X, 'e_3' )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1427, [ equalish( 'e_3', 'e_4' ), equalish( 'e_3', 'e_4' ), product( 
% 1.00/1.36    'e_3', 'e_1', 'e_4' ), product( 'e_3', 'e_2', 'e_4' ) ] )
% 1.00/1.36  , clause( 1423, [ equalish( 'e_3', 'e_4' ), ~( 'group_element'( 'e_3' ) ), 
% 1.00/1.36    equalish( 'e_3', 'e_4' ), product( 'e_3', 'e_1', 'e_4' ), product( 'e_3'
% 1.00/1.36    , 'e_2', 'e_4' ) ] )
% 1.00/1.36  , 1, clause( 4, [ 'group_element'( 'e_3' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  factor(
% 1.00/1.36  clause( 1428, [ equalish( 'e_3', 'e_4' ), product( 'e_3', 'e_1', 'e_4' ), 
% 1.00/1.36    product( 'e_3', 'e_2', 'e_4' ) ] )
% 1.00/1.36  , clause( 1427, [ equalish( 'e_3', 'e_4' ), equalish( 'e_3', 'e_4' ), 
% 1.00/1.36    product( 'e_3', 'e_1', 'e_4' ), product( 'e_3', 'e_2', 'e_4' ) ] )
% 1.00/1.36  , 0, 1, substitution( 0, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 314, [ equalish( 'e_3', 'e_4' ), product( 'e_3', 'e_1', 'e_4' ), 
% 1.00/1.36    product( 'e_3', 'e_2', 'e_4' ) ] )
% 1.00/1.36  , clause( 1428, [ equalish( 'e_3', 'e_4' ), product( 'e_3', 'e_1', 'e_4' )
% 1.00/1.36    , product( 'e_3', 'e_2', 'e_4' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 1.00/1.36    , 2 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1429, [ product( 'e_3', 'e_1', 'e_4' ), product( 'e_3', 'e_2', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , clause( 14, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 314, [ equalish( 'e_3', 'e_4' ), product( 'e_3', 'e_1', 'e_4'
% 1.00/1.36     ), product( 'e_3', 'e_2', 'e_4' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 315, [ product( 'e_3', 'e_1', 'e_4' ), product( 'e_3', 'e_2', 'e_4'
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1429, [ product( 'e_3', 'e_1', 'e_4' ), product( 'e_3', 'e_2', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1430, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_3', 'e_1', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , clause( 130, [ product( 'e_4', 'e_3', 'e_1' ), ~( product( 'e_3', 'e_2', 
% 1.00/1.36    'e_4' ) ) ] )
% 1.00/1.36  , 1, clause( 315, [ product( 'e_3', 'e_1', 'e_4' ), product( 'e_3', 'e_2', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , 1, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 323, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_3', 'e_1', 'e_4'
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1430, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_3', 'e_1', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1432, [ equalish( 'e_3', 'e_4' ), ~( product( 'e_4', 'e_3', 'e_2' )
% 1.00/1.36     ), product( 'e_3', 'e_1', 'e_4' ) ] )
% 1.00/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 1.00/1.36    , Z ) ) ] )
% 1.00/1.36  , 1, clause( 315, [ product( 'e_3', 'e_1', 'e_4' ), product( 'e_3', 'e_2', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_3' ), :=( Y, 'e_4' ), :=( Z, 'e_2' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1436, [ ~( product( 'e_4', 'e_3', 'e_2' ) ), product( 'e_3', 'e_1'
% 1.00/1.36    , 'e_4' ) ] )
% 1.00/1.36  , clause( 14, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 1432, [ equalish( 'e_3', 'e_4' ), ~( product( 'e_4', 'e_3', 
% 1.00/1.36    'e_2' ) ), product( 'e_3', 'e_1', 'e_4' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 334, [ ~( product( 'e_4', 'e_3', 'e_2' ) ), product( 'e_3', 'e_1', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , clause( 1436, [ ~( product( 'e_4', 'e_3', 'e_2' ) ), product( 'e_3', 
% 1.00/1.36    'e_1', 'e_4' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1439, [ equalish( 'e_3', 'e_4' ), ~( 'group_element'( 'e_3' ) ), 
% 1.00/1.36    equalish( 'e_3', 'e_4' ), product( 'e_1', 'e_3', 'e_4' ), product( 'e_2'
% 1.00/1.36    , 'e_3', 'e_4' ) ] )
% 1.00/1.36  , clause( 50, [ equalish( X, Y ), ~( product( X, X, Y ) ) ] )
% 1.00/1.36  , 1, clause( 81, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 1.00/1.36    'e_1', X, 'e_4' ), product( 'e_2', X, 'e_4' ), product( 'e_3', X, 'e_4' )
% 1.00/1.36     ] )
% 1.00/1.36  , 4, substitution( 0, [ :=( X, 'e_3' ), :=( Y, 'e_4' )] ), substitution( 1
% 1.00/1.36    , [ :=( X, 'e_3' )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1443, [ equalish( 'e_3', 'e_4' ), equalish( 'e_3', 'e_4' ), product( 
% 1.00/1.36    'e_1', 'e_3', 'e_4' ), product( 'e_2', 'e_3', 'e_4' ) ] )
% 1.00/1.36  , clause( 1439, [ equalish( 'e_3', 'e_4' ), ~( 'group_element'( 'e_3' ) ), 
% 1.00/1.36    equalish( 'e_3', 'e_4' ), product( 'e_1', 'e_3', 'e_4' ), product( 'e_2'
% 1.00/1.36    , 'e_3', 'e_4' ) ] )
% 1.00/1.36  , 1, clause( 4, [ 'group_element'( 'e_3' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  factor(
% 1.00/1.36  clause( 1444, [ equalish( 'e_3', 'e_4' ), product( 'e_1', 'e_3', 'e_4' ), 
% 1.00/1.36    product( 'e_2', 'e_3', 'e_4' ) ] )
% 1.00/1.36  , clause( 1443, [ equalish( 'e_3', 'e_4' ), equalish( 'e_3', 'e_4' ), 
% 1.00/1.36    product( 'e_1', 'e_3', 'e_4' ), product( 'e_2', 'e_3', 'e_4' ) ] )
% 1.00/1.36  , 0, 1, substitution( 0, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 495, [ equalish( 'e_3', 'e_4' ), product( 'e_1', 'e_3', 'e_4' ), 
% 1.00/1.36    product( 'e_2', 'e_3', 'e_4' ) ] )
% 1.00/1.36  , clause( 1444, [ equalish( 'e_3', 'e_4' ), product( 'e_1', 'e_3', 'e_4' )
% 1.00/1.36    , product( 'e_2', 'e_3', 'e_4' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 1.00/1.36    , 2 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1445, [ product( 'e_1', 'e_3', 'e_4' ), product( 'e_2', 'e_3', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , clause( 14, [ ~( equalish( 'e_3', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 495, [ equalish( 'e_3', 'e_4' ), product( 'e_1', 'e_3', 'e_4'
% 1.00/1.36     ), product( 'e_2', 'e_3', 'e_4' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 566, [ product( 'e_1', 'e_3', 'e_4' ), product( 'e_2', 'e_3', 'e_4'
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1445, [ product( 'e_1', 'e_3', 'e_4' ), product( 'e_2', 'e_3', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1446, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_1', 'e_3', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , clause( 204, [ product( 'e_4', 'e_1', 'e_3' ), ~( product( 'e_2', 'e_3', 
% 1.00/1.36    'e_4' ) ) ] )
% 1.00/1.36  , 1, clause( 566, [ product( 'e_1', 'e_3', 'e_4' ), product( 'e_2', 'e_3', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , 1, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 567, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_1', 'e_3', 'e_4'
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1446, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_1', 'e_3', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1450, [ equalish( 'e_3', 'e_2' ), ~( product( 'e_3', 'e_4', 'e_2' )
% 1.00/1.36     ), product( 'e_1', 'e_3', 'e_4' ) ] )
% 1.00/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 1.00/1.36    , Z ) ) ] )
% 1.00/1.36  , 2, clause( 566, [ product( 'e_1', 'e_3', 'e_4' ), product( 'e_2', 'e_3', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_3' ), :=( Y, 'e_2' ), :=( Z, 'e_4' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1452, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), equalish( 'e_3', 'e_2'
% 1.00/1.36     ), ~( product( 'e_3', 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , clause( 222, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), ~( product( 'e_1', 
% 1.00/1.36    'e_3', 'e_4' ) ) ] )
% 1.00/1.36  , 1, clause( 1450, [ equalish( 'e_3', 'e_2' ), ~( product( 'e_3', 'e_4', 
% 1.00/1.36    'e_2' ) ), product( 'e_1', 'e_3', 'e_4' ) ] )
% 1.00/1.36  , 2, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  factor(
% 1.00/1.36  clause( 1453, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), equalish( 'e_3', 'e_2'
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1452, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), equalish( 'e_3', 
% 1.00/1.36    'e_2' ), ~( product( 'e_3', 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , 0, 2, substitution( 0, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 579, [ equalish( 'e_3', 'e_2' ), ~( product( 'e_3', 'e_4', 'e_2' )
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1453, [ ~( product( 'e_3', 'e_4', 'e_2' ) ), equalish( 'e_3', 
% 1.00/1.36    'e_2' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1454, [ ~( product( 'e_3', 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , clause( 13, [ ~( equalish( 'e_3', 'e_2' ) ) ] )
% 1.00/1.36  , 0, clause( 579, [ equalish( 'e_3', 'e_2' ), ~( product( 'e_3', 'e_4', 
% 1.00/1.36    'e_2' ) ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 589, [ ~( product( 'e_3', 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , clause( 1454, [ ~( product( 'e_3', 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1455, [ ~( 'group_element'( 'e_2' ) ), equalish( 'e_2', 'e_4' ), 
% 1.00/1.36    product( 'e_1', 'e_4', 'e_2' ), product( 'e_2', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , clause( 589, [ ~( product( 'e_3', 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , 0, clause( 61, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 1.00/1.36    'e_1', 'e_4', X ), product( 'e_2', 'e_4', X ), product( 'e_3', 'e_4', X )
% 1.00/1.36     ] )
% 1.00/1.36  , 4, substitution( 0, [] ), substitution( 1, [ :=( X, 'e_2' )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1456, [ equalish( 'e_2', 'e_4' ), product( 'e_1', 'e_4', 'e_2' ), 
% 1.00/1.36    product( 'e_2', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , clause( 1455, [ ~( 'group_element'( 'e_2' ) ), equalish( 'e_2', 'e_4' ), 
% 1.00/1.36    product( 'e_1', 'e_4', 'e_2' ), product( 'e_2', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , 0, clause( 3, [ 'group_element'( 'e_2' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 592, [ equalish( 'e_2', 'e_4' ), product( 'e_1', 'e_4', 'e_2' ), 
% 1.00/1.36    product( 'e_2', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , clause( 1456, [ equalish( 'e_2', 'e_4' ), product( 'e_1', 'e_4', 'e_2' )
% 1.00/1.36    , product( 'e_2', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 1.00/1.36    , 2 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1460, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1' )
% 1.00/1.36     ), product( 'e_4', 'e_1', 'e_3' ) ] )
% 1.00/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 1.00/1.36    , Z ) ) ] )
% 1.00/1.36  , 2, clause( 567, [ product( 'e_4', 'e_1', 'e_3' ), product( 'e_1', 'e_3', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_3' ), :=( Y, 'e_1' ), :=( Z, 'e_4' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1470, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1' )
% 1.00/1.36     ), equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1' ) ) ] )
% 1.00/1.36  , clause( 36, [ equalish( X, Y ), ~( product( Z, Y, X ) ), ~( product( X, Z
% 1.00/1.36    , Y ) ) ] )
% 1.00/1.36  , 1, clause( 1460, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 
% 1.00/1.36    'e_1' ) ), product( 'e_4', 'e_1', 'e_3' ) ] )
% 1.00/1.36  , 2, substitution( 0, [ :=( X, 'e_3' ), :=( Y, 'e_1' ), :=( Z, 'e_4' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  factor(
% 1.00/1.36  clause( 1472, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1' )
% 1.00/1.36     ), equalish( 'e_3', 'e_1' ) ] )
% 1.00/1.36  , clause( 1470, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1'
% 1.00/1.36     ) ), equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1' ) ) ] )
% 1.00/1.36  , 1, 3, substitution( 0, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  factor(
% 1.00/1.36  clause( 1473, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1' )
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1472, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1'
% 1.00/1.36     ) ), equalish( 'e_3', 'e_1' ) ] )
% 1.00/1.36  , 0, 2, substitution( 0, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 609, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1' )
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1473, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 'e_1'
% 1.00/1.36     ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1474, [ ~( product( 'e_3', 'e_4', 'e_1' ) ) ] )
% 1.00/1.36  , clause( 12, [ ~( equalish( 'e_3', 'e_1' ) ) ] )
% 1.00/1.36  , 0, clause( 609, [ equalish( 'e_3', 'e_1' ), ~( product( 'e_3', 'e_4', 
% 1.00/1.36    'e_1' ) ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 618, [ ~( product( 'e_3', 'e_4', 'e_1' ) ) ] )
% 1.00/1.36  , clause( 1474, [ ~( product( 'e_3', 'e_4', 'e_1' ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1475, [ ~( 'group_element'( 'e_1' ) ), equalish( 'e_1', 'e_4' ), 
% 1.00/1.36    product( 'e_1', 'e_4', 'e_1' ), product( 'e_2', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , clause( 618, [ ~( product( 'e_3', 'e_4', 'e_1' ) ) ] )
% 1.00/1.36  , 0, clause( 61, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 1.00/1.36    'e_1', 'e_4', X ), product( 'e_2', 'e_4', X ), product( 'e_3', 'e_4', X )
% 1.00/1.36     ] )
% 1.00/1.36  , 4, substitution( 0, [] ), substitution( 1, [ :=( X, 'e_1' )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1476, [ equalish( 'e_1', 'e_4' ), product( 'e_1', 'e_4', 'e_1' ), 
% 1.00/1.36    product( 'e_2', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , clause( 1475, [ ~( 'group_element'( 'e_1' ) ), equalish( 'e_1', 'e_4' ), 
% 1.00/1.36    product( 'e_1', 'e_4', 'e_1' ), product( 'e_2', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , 0, clause( 2, [ 'group_element'( 'e_1' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 621, [ equalish( 'e_1', 'e_4' ), product( 'e_1', 'e_4', 'e_1' ), 
% 1.00/1.36    product( 'e_2', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , clause( 1476, [ equalish( 'e_1', 'e_4' ), product( 'e_1', 'e_4', 'e_1' )
% 1.00/1.36    , product( 'e_2', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 1.00/1.36    , 2 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1477, [ product( 'e_1', 'e_4', 'e_1' ), product( 'e_2', 'e_4', 
% 1.00/1.36    'e_1' ) ] )
% 1.00/1.36  , clause( 8, [ ~( equalish( 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 621, [ equalish( 'e_1', 'e_4' ), product( 'e_1', 'e_4', 'e_1'
% 1.00/1.36     ), product( 'e_2', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 767, [ product( 'e_1', 'e_4', 'e_1' ), product( 'e_2', 'e_4', 'e_1'
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1477, [ product( 'e_1', 'e_4', 'e_1' ), product( 'e_2', 'e_4', 
% 1.00/1.36    'e_1' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1481, [ equalish( 'e_4', 'e_2' ), ~( product( 'e_4', 'e_1', 'e_2' )
% 1.00/1.36     ), product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 1.00/1.36    , Z ) ) ] )
% 1.00/1.36  , 2, clause( 767, [ product( 'e_1', 'e_4', 'e_1' ), product( 'e_2', 'e_4', 
% 1.00/1.36    'e_1' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_4' ), :=( Y, 'e_2' ), :=( Z, 'e_1' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1482, [ ~( product( 'e_4', 'e_1', 'e_2' ) ), product( 'e_1', 'e_4'
% 1.00/1.36    , 'e_1' ) ] )
% 1.00/1.36  , clause( 16, [ ~( equalish( 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , 0, clause( 1481, [ equalish( 'e_4', 'e_2' ), ~( product( 'e_4', 'e_1', 
% 1.00/1.36    'e_2' ) ), product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 781, [ product( 'e_1', 'e_4', 'e_1' ), ~( product( 'e_4', 'e_1', 
% 1.00/1.36    'e_2' ) ) ] )
% 1.00/1.36  , clause( 1482, [ ~( product( 'e_4', 'e_1', 'e_2' ) ), product( 'e_1', 
% 1.00/1.36    'e_4', 'e_1' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1486, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ), 
% 1.00/1.36    product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , clause( 19, [ equalish( Z, T ), ~( product( X, Y, Z ) ), ~( product( X, Y
% 1.00/1.36    , T ) ) ] )
% 1.00/1.36  , 2, clause( 767, [ product( 'e_1', 'e_4', 'e_1' ), product( 'e_2', 'e_4', 
% 1.00/1.36    'e_1' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_2' ), :=( Y, 'e_4' ), :=( Z, X ), :=( T, 
% 1.00/1.36    'e_1' )] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 787, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ), 
% 1.00/1.36    product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , clause( 1486, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ), 
% 1.00/1.36    product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 
% 1.00/1.36    1 ), ==>( 2, 2 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1487, [ equalish( 'e_4', 'e_1' ), equalish( X, 'e_1' ), ~( product( 
% 1.00/1.36    'e_2', 'e_4', X ) ) ] )
% 1.00/1.36  , clause( 71, [ equalish( X, Y ), ~( product( Y, X, Y ) ) ] )
% 1.00/1.36  , 1, clause( 787, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ), 
% 1.00/1.36    product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , 2, substitution( 0, [ :=( X, 'e_4' ), :=( Y, 'e_1' )] ), substitution( 1
% 1.00/1.36    , [ :=( X, X )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1490, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ) ] )
% 1.00/1.36  , clause( 15, [ ~( equalish( 'e_4', 'e_1' ) ) ] )
% 1.00/1.36  , 0, clause( 1487, [ equalish( 'e_4', 'e_1' ), equalish( X, 'e_1' ), ~( 
% 1.00/1.36    product( 'e_2', 'e_4', X ) ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [ :=( X, X )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 852, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ) ] )
% 1.00/1.36  , clause( 1490, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ) ]
% 1.00/1.36     )
% 1.00/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 
% 1.00/1.36    1 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1491, [ product( 'e_1', 'e_4', 'e_2' ), product( 'e_2', 'e_4', 
% 1.00/1.36    'e_2' ) ] )
% 1.00/1.36  , clause( 11, [ ~( equalish( 'e_2', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 592, [ equalish( 'e_2', 'e_4' ), product( 'e_1', 'e_4', 'e_2'
% 1.00/1.36     ), product( 'e_2', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 863, [ product( 'e_1', 'e_4', 'e_2' ), product( 'e_2', 'e_4', 'e_2'
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1491, [ product( 'e_1', 'e_4', 'e_2' ), product( 'e_2', 'e_4', 
% 1.00/1.36    'e_2' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1492, [ equalish( 'e_2', 'e_1' ), product( 'e_1', 'e_4', 'e_2' ) ]
% 1.00/1.36     )
% 1.00/1.36  , clause( 852, [ equalish( X, 'e_1' ), ~( product( 'e_2', 'e_4', X ) ) ] )
% 1.00/1.36  , 1, clause( 863, [ product( 'e_1', 'e_4', 'e_2' ), product( 'e_2', 'e_4', 
% 1.00/1.36    'e_2' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_2' )] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1493, [ product( 'e_1', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , clause( 9, [ ~( equalish( 'e_2', 'e_1' ) ) ] )
% 1.00/1.36  , 0, clause( 1492, [ equalish( 'e_2', 'e_1' ), product( 'e_1', 'e_4', 'e_2'
% 1.00/1.36     ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 864, [ product( 'e_1', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , clause( 1493, [ product( 'e_1', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1495, [ equalish( 'e_4', 'e_1' ), ~( product( 'e_4', 'e_2', 'e_1' )
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 34, [ equalish( X, Y ), ~( product( X, Z, Y ) ), ~( product( Y, X
% 1.00/1.36    , Z ) ) ] )
% 1.00/1.36  , 2, clause( 864, [ product( 'e_1', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , 0, substitution( 0, [ :=( X, 'e_4' ), :=( Y, 'e_1' ), :=( Z, 'e_2' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1496, [ ~( product( 'e_4', 'e_2', 'e_1' ) ) ] )
% 1.00/1.36  , clause( 15, [ ~( equalish( 'e_4', 'e_1' ) ) ] )
% 1.00/1.36  , 0, clause( 1495, [ equalish( 'e_4', 'e_1' ), ~( product( 'e_4', 'e_2', 
% 1.00/1.36    'e_1' ) ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 884, [ ~( product( 'e_4', 'e_2', 'e_1' ) ) ] )
% 1.00/1.36  , clause( 1496, [ ~( product( 'e_4', 'e_2', 'e_1' ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1498, [ equalish( X, 'e_2' ), ~( product( 'e_1', 'e_4', X ) ) ] )
% 1.00/1.36  , clause( 19, [ equalish( Z, T ), ~( product( X, Y, Z ) ), ~( product( X, Y
% 1.00/1.36    , T ) ) ] )
% 1.00/1.36  , 2, clause( 864, [ product( 'e_1', 'e_4', 'e_2' ) ] )
% 1.00/1.36  , 0, substitution( 0, [ :=( X, 'e_1' ), :=( Y, 'e_4' ), :=( Z, X ), :=( T, 
% 1.00/1.36    'e_2' )] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 892, [ equalish( X, 'e_2' ), ~( product( 'e_1', 'e_4', X ) ) ] )
% 1.00/1.36  , clause( 1498, [ equalish( X, 'e_2' ), ~( product( 'e_1', 'e_4', X ) ) ]
% 1.00/1.36     )
% 1.00/1.36  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 
% 1.00/1.36    1 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1499, [ ~( 'group_element'( 'e_1' ) ), equalish( 'e_4', 'e_1' ), 
% 1.00/1.36    product( 'e_4', 'e_1', 'e_1' ), ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , clause( 884, [ ~( product( 'e_4', 'e_2', 'e_1' ) ) ] )
% 1.00/1.36  , 0, clause( 190, [ ~( 'group_element'( X ) ), equalish( 'e_4', X ), 
% 1.00/1.36    product( 'e_4', 'e_1', X ), ~( product( 'e_3', X, 'e_4' ) ), product( 
% 1.00/1.36    'e_4', 'e_2', X ) ] )
% 1.00/1.36  , 4, substitution( 0, [] ), substitution( 1, [ :=( X, 'e_1' )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1500, [ equalish( 'e_4', 'e_1' ), product( 'e_4', 'e_1', 'e_1' ), 
% 1.00/1.36    ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , clause( 1499, [ ~( 'group_element'( 'e_1' ) ), equalish( 'e_4', 'e_1' ), 
% 1.00/1.36    product( 'e_4', 'e_1', 'e_1' ), ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 2, [ 'group_element'( 'e_1' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 946, [ equalish( 'e_4', 'e_1' ), product( 'e_4', 'e_1', 'e_1' ), 
% 1.00/1.36    ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , clause( 1500, [ equalish( 'e_4', 'e_1' ), product( 'e_4', 'e_1', 'e_1' )
% 1.00/1.36    , ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 1.00/1.36    , 2 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1501, [ product( 'e_4', 'e_1', 'e_1' ), ~( product( 'e_3', 'e_1', 
% 1.00/1.36    'e_4' ) ) ] )
% 1.00/1.36  , clause( 15, [ ~( equalish( 'e_4', 'e_1' ) ) ] )
% 1.00/1.36  , 0, clause( 946, [ equalish( 'e_4', 'e_1' ), product( 'e_4', 'e_1', 'e_1'
% 1.00/1.36     ), ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 979, [ product( 'e_4', 'e_1', 'e_1' ), ~( product( 'e_3', 'e_1', 
% 1.00/1.36    'e_4' ) ) ] )
% 1.00/1.36  , clause( 1501, [ product( 'e_4', 'e_1', 'e_1' ), ~( product( 'e_3', 'e_1'
% 1.00/1.36    , 'e_4' ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1502, [ product( 'e_4', 'e_1', 'e_1' ), product( 'e_4', 'e_3', 
% 1.00/1.36    'e_1' ) ] )
% 1.00/1.36  , clause( 979, [ product( 'e_4', 'e_1', 'e_1' ), ~( product( 'e_3', 'e_1', 
% 1.00/1.36    'e_4' ) ) ] )
% 1.00/1.36  , 1, clause( 323, [ product( 'e_4', 'e_3', 'e_1' ), product( 'e_3', 'e_1', 
% 1.00/1.36    'e_4' ) ] )
% 1.00/1.36  , 1, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 993, [ product( 'e_4', 'e_1', 'e_1' ), product( 'e_4', 'e_3', 'e_1'
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1502, [ product( 'e_4', 'e_1', 'e_1' ), product( 'e_4', 'e_3', 
% 1.00/1.36    'e_1' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1506, [ equalish( 'e_1', 'e_4' ), ~( product( 'e_3', 'e_1', 'e_4' )
% 1.00/1.36     ), product( 'e_4', 'e_1', 'e_1' ) ] )
% 1.00/1.36  , clause( 39, [ equalish( X, Y ), ~( product( Z, X, Y ) ), ~( product( Y, Z
% 1.00/1.36    , X ) ) ] )
% 1.00/1.36  , 2, clause( 993, [ product( 'e_4', 'e_1', 'e_1' ), product( 'e_4', 'e_3', 
% 1.00/1.36    'e_1' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_1' ), :=( Y, 'e_4' ), :=( Z, 'e_3' )] ), 
% 1.00/1.36    substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1508, [ equalish( 'e_1', 'e_4' ), equalish( 'e_1', 'e_4' ), ~( 
% 1.00/1.36    product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , clause( 42, [ equalish( X, Y ), ~( product( Y, X, X ) ) ] )
% 1.00/1.36  , 1, clause( 1506, [ equalish( 'e_1', 'e_4' ), ~( product( 'e_3', 'e_1', 
% 1.00/1.36    'e_4' ) ), product( 'e_4', 'e_1', 'e_1' ) ] )
% 1.00/1.36  , 2, substitution( 0, [ :=( X, 'e_1' ), :=( Y, 'e_4' )] ), substitution( 1
% 1.00/1.36    , [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  factor(
% 1.00/1.36  clause( 1509, [ equalish( 'e_1', 'e_4' ), ~( product( 'e_3', 'e_1', 'e_4' )
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1508, [ equalish( 'e_1', 'e_4' ), equalish( 'e_1', 'e_4' ), ~( 
% 1.00/1.36    product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , 0, 1, substitution( 0, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 1023, [ equalish( 'e_1', 'e_4' ), ~( product( 'e_3', 'e_1', 'e_4' )
% 1.00/1.36     ) ] )
% 1.00/1.36  , clause( 1509, [ equalish( 'e_1', 'e_4' ), ~( product( 'e_3', 'e_1', 'e_4'
% 1.00/1.36     ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1510, [ ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , clause( 8, [ ~( equalish( 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 1023, [ equalish( 'e_1', 'e_4' ), ~( product( 'e_3', 'e_1', 
% 1.00/1.36    'e_4' ) ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 1025, [ ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , clause( 1510, [ ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1511, [ ~( product( 'e_4', 'e_3', 'e_2' ) ) ] )
% 1.00/1.36  , clause( 1025, [ ~( product( 'e_3', 'e_1', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 334, [ ~( product( 'e_4', 'e_3', 'e_2' ) ), product( 'e_3', 
% 1.00/1.36    'e_1', 'e_4' ) ] )
% 1.00/1.36  , 1, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 1040, [ ~( product( 'e_4', 'e_3', 'e_2' ) ) ] )
% 1.00/1.36  , clause( 1511, [ ~( product( 'e_4', 'e_3', 'e_2' ) ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1512, [ ~( 'group_element'( 'e_2' ) ), equalish( 'e_2', 'e_4' ), 
% 1.00/1.36    product( 'e_4', 'e_1', 'e_2' ), product( 'e_4', 'e_2', 'e_2' ) ] )
% 1.00/1.36  , clause( 1040, [ ~( product( 'e_4', 'e_3', 'e_2' ) ) ] )
% 1.00/1.36  , 0, clause( 60, [ ~( 'group_element'( X ) ), equalish( X, 'e_4' ), product( 
% 1.00/1.36    'e_4', 'e_1', X ), product( 'e_4', 'e_2', X ), product( 'e_4', 'e_3', X )
% 1.00/1.36     ] )
% 1.00/1.36  , 4, substitution( 0, [] ), substitution( 1, [ :=( X, 'e_2' )] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1513, [ equalish( 'e_2', 'e_4' ), product( 'e_4', 'e_1', 'e_2' ), 
% 1.00/1.36    product( 'e_4', 'e_2', 'e_2' ) ] )
% 1.00/1.36  , clause( 1512, [ ~( 'group_element'( 'e_2' ) ), equalish( 'e_2', 'e_4' ), 
% 1.00/1.36    product( 'e_4', 'e_1', 'e_2' ), product( 'e_4', 'e_2', 'e_2' ) ] )
% 1.00/1.36  , 0, clause( 3, [ 'group_element'( 'e_2' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 1050, [ equalish( 'e_2', 'e_4' ), product( 'e_4', 'e_1', 'e_2' ), 
% 1.00/1.36    product( 'e_4', 'e_2', 'e_2' ) ] )
% 1.00/1.36  , clause( 1513, [ equalish( 'e_2', 'e_4' ), product( 'e_4', 'e_1', 'e_2' )
% 1.00/1.36    , product( 'e_4', 'e_2', 'e_2' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 1.00/1.36    , 2 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1514, [ product( 'e_4', 'e_1', 'e_2' ), product( 'e_4', 'e_2', 
% 1.00/1.36    'e_2' ) ] )
% 1.00/1.36  , clause( 11, [ ~( equalish( 'e_2', 'e_4' ) ) ] )
% 1.00/1.36  , 0, clause( 1050, [ equalish( 'e_2', 'e_4' ), product( 'e_4', 'e_1', 'e_2'
% 1.00/1.36     ), product( 'e_4', 'e_2', 'e_2' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 1099, [ product( 'e_4', 'e_1', 'e_2' ), product( 'e_4', 'e_2', 
% 1.00/1.36    'e_2' ) ] )
% 1.00/1.36  , clause( 1514, [ product( 'e_4', 'e_1', 'e_2' ), product( 'e_4', 'e_2', 
% 1.00/1.36    'e_2' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 )] )
% 1.00/1.36     ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1515, [ equalish( 'e_4', 'e_2' ), product( 'e_4', 'e_1', 'e_2' ) ]
% 1.00/1.36     )
% 1.00/1.36  , clause( 43, [ equalish( X, Y ), ~( product( X, Y, Y ) ) ] )
% 1.00/1.36  , 1, clause( 1099, [ product( 'e_4', 'e_1', 'e_2' ), product( 'e_4', 'e_2'
% 1.00/1.36    , 'e_2' ) ] )
% 1.00/1.36  , 1, substitution( 0, [ :=( X, 'e_4' ), :=( Y, 'e_2' )] ), substitution( 1
% 1.00/1.36    , [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1516, [ product( 'e_4', 'e_1', 'e_2' ) ] )
% 1.00/1.36  , clause( 16, [ ~( equalish( 'e_4', 'e_2' ) ) ] )
% 1.00/1.36  , 0, clause( 1515, [ equalish( 'e_4', 'e_2' ), product( 'e_4', 'e_1', 'e_2'
% 1.00/1.36     ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 1116, [ product( 'e_4', 'e_1', 'e_2' ) ] )
% 1.00/1.36  , clause( 1516, [ product( 'e_4', 'e_1', 'e_2' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1517, [ product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , clause( 781, [ product( 'e_1', 'e_4', 'e_1' ), ~( product( 'e_4', 'e_1', 
% 1.00/1.36    'e_2' ) ) ] )
% 1.00/1.36  , 1, clause( 1116, [ product( 'e_4', 'e_1', 'e_2' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 1117, [ product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , clause( 1517, [ product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1518, [ equalish( 'e_1', 'e_2' ) ] )
% 1.00/1.36  , clause( 892, [ equalish( X, 'e_2' ), ~( product( 'e_1', 'e_4', X ) ) ] )
% 1.00/1.36  , 1, clause( 1117, [ product( 'e_1', 'e_4', 'e_1' ) ] )
% 1.00/1.36  , 0, substitution( 0, [ :=( X, 'e_1' )] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  resolution(
% 1.00/1.36  clause( 1519, [] )
% 1.00/1.36  , clause( 6, [ ~( equalish( 'e_1', 'e_2' ) ) ] )
% 1.00/1.36  , 0, clause( 1518, [ equalish( 'e_1', 'e_2' ) ] )
% 1.00/1.36  , 0, substitution( 0, [] ), substitution( 1, [] )).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  subsumption(
% 1.00/1.36  clause( 1147, [] )
% 1.00/1.36  , clause( 1519, [] )
% 1.00/1.36  , substitution( 0, [] ), permutation( 0, [] ) ).
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  end.
% 1.00/1.36  
% 1.00/1.36  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 1.00/1.36  
% 1.00/1.36  Memory use:
% 1.00/1.36  
% 1.00/1.36  space for terms:        17998
% 1.00/1.36  space for clauses:      44452
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  clauses generated:      26420
% 1.00/1.36  clauses kept:           1148
% 1.00/1.36  clauses selected:       432
% 1.00/1.36  clauses deleted:        146
% 1.00/1.36  clauses inuse deleted:  36
% 1.00/1.36  
% 1.00/1.36  subsentry:          59346
% 1.00/1.36  literals s-matched: 44865
% 1.00/1.36  literals matched:   44690
% 1.00/1.36  full subsumption:   32997
% 1.00/1.36  
% 1.00/1.36  checksum:           -1983146312
% 1.00/1.36  
% 1.00/1.36  
% 1.00/1.36  Bliksem ended
%------------------------------------------------------------------------------