TSTP Solution File: GRP012-1 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : GRP012-1 : TPTP v8.1.0. Released v1.0.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n013.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8042.1875MB
% OS       : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit  : 0s
% DateTime : Sat Jul 16 07:34:17 EDT 2022

% Result   : Unsatisfiable 1.87s 2.28s
% Output   : Refutation 1.87s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.11  % Problem  : GRP012-1 : TPTP v8.1.0. Released v1.0.0.
% 0.03/0.12  % Command  : bliksem %s
% 0.13/0.33  % Computer : n013.cluster.edu
% 0.13/0.33  % Model    : x86_64 x86_64
% 0.13/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.33  % Memory   : 8042.1875MB
% 0.13/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.13/0.33  % CPULimit : 300
% 0.13/0.33  % DateTime : Tue Jun 14 04:14:58 EDT 2022
% 0.13/0.33  % CPUTime  : 
% 1.87/2.28  *** allocated 10000 integers for termspace/termends
% 1.87/2.28  *** allocated 10000 integers for clauses
% 1.87/2.28  *** allocated 10000 integers for justifications
% 1.87/2.28  Bliksem 1.12
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Automatic Strategy Selection
% 1.87/2.28  
% 1.87/2.28  Clauses:
% 1.87/2.28  [
% 1.87/2.28     [ product( identity, X, X ) ],
% 1.87/2.28     [ product( X, identity, X ) ],
% 1.87/2.28     [ product( inverse( X ), X, identity ) ],
% 1.87/2.28     [ product( X, inverse( X ), identity ) ],
% 1.87/2.28     [ product( X, Y, multiply( X, Y ) ) ],
% 1.87/2.28     [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), =( Z, T ) ],
% 1.87/2.28     [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( product( Z, T, W
% 1.87/2.28     ) ), product( X, U, W ) ],
% 1.87/2.28     [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( product( X, U, W
% 1.87/2.28     ) ), product( Z, T, W ) ],
% 1.87/2.28     [ product( a, b, c ) ],
% 1.87/2.28     [ product( inverse( b ), inverse( a ), d ) ],
% 1.87/2.28     [ ~( product( c, d, identity ) ) ]
% 1.87/2.28  ] .
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  percentage equality = 0.052632, percentage horn = 1.000000
% 1.87/2.28  This is a problem with some equality
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Options Used:
% 1.87/2.28  
% 1.87/2.28  useres =            1
% 1.87/2.28  useparamod =        1
% 1.87/2.28  useeqrefl =         1
% 1.87/2.28  useeqfact =         1
% 1.87/2.28  usefactor =         1
% 1.87/2.28  usesimpsplitting =  0
% 1.87/2.28  usesimpdemod =      5
% 1.87/2.28  usesimpres =        3
% 1.87/2.28  
% 1.87/2.28  resimpinuse      =  1000
% 1.87/2.28  resimpclauses =     20000
% 1.87/2.28  substype =          eqrewr
% 1.87/2.28  backwardsubs =      1
% 1.87/2.28  selectoldest =      5
% 1.87/2.28  
% 1.87/2.28  litorderings [0] =  split
% 1.87/2.28  litorderings [1] =  extend the termordering, first sorting on arguments
% 1.87/2.28  
% 1.87/2.28  termordering =      kbo
% 1.87/2.28  
% 1.87/2.28  litapriori =        0
% 1.87/2.28  termapriori =       1
% 1.87/2.28  litaposteriori =    0
% 1.87/2.28  termaposteriori =   0
% 1.87/2.28  demodaposteriori =  0
% 1.87/2.28  ordereqreflfact =   0
% 1.87/2.28  
% 1.87/2.28  litselect =         negord
% 1.87/2.28  
% 1.87/2.28  maxweight =         15
% 1.87/2.28  maxdepth =          30000
% 1.87/2.28  maxlength =         115
% 1.87/2.28  maxnrvars =         195
% 1.87/2.28  excuselevel =       1
% 1.87/2.28  increasemaxweight = 1
% 1.87/2.28  
% 1.87/2.28  maxselected =       10000000
% 1.87/2.28  maxnrclauses =      10000000
% 1.87/2.28  
% 1.87/2.28  showgenerated =    0
% 1.87/2.28  showkept =         0
% 1.87/2.28  showselected =     0
% 1.87/2.28  showdeleted =      0
% 1.87/2.28  showresimp =       1
% 1.87/2.28  showstatus =       2000
% 1.87/2.28  
% 1.87/2.28  prologoutput =     1
% 1.87/2.28  nrgoals =          5000000
% 1.87/2.28  totalproof =       1
% 1.87/2.28  
% 1.87/2.28  Symbols occurring in the translation:
% 1.87/2.28  
% 1.87/2.28  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 1.87/2.28  .  [1, 2]      (w:1, o:26, a:1, s:1, b:0), 
% 1.87/2.28  !  [4, 1]      (w:0, o:20, a:1, s:1, b:0), 
% 1.87/2.28  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 1.87/2.28  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 1.87/2.28  identity  [39, 0]      (w:1, o:9, a:1, s:1, b:0), 
% 1.87/2.28  product  [41, 3]      (w:1, o:52, a:1, s:1, b:0), 
% 1.87/2.28  inverse  [42, 1]      (w:1, o:25, a:1, s:1, b:0), 
% 1.87/2.28  multiply  [44, 2]      (w:1, o:51, a:1, s:1, b:0), 
% 1.87/2.28  a  [49, 0]      (w:1, o:16, a:1, s:1, b:0), 
% 1.87/2.28  b  [50, 0]      (w:1, o:17, a:1, s:1, b:0), 
% 1.87/2.28  c  [51, 0]      (w:1, o:18, a:1, s:1, b:0), 
% 1.87/2.28  d  [52, 0]      (w:1, o:19, a:1, s:1, b:0).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Starting Search:
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Intermediate Status:
% 1.87/2.28  Generated:    5971
% 1.87/2.28  Kept:         2013
% 1.87/2.28  Inuse:        85
% 1.87/2.28  Deleted:      15
% 1.87/2.28  Deletedinuse: 13
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Intermediate Status:
% 1.87/2.28  Generated:    12614
% 1.87/2.28  Kept:         4047
% 1.87/2.28  Inuse:        142
% 1.87/2.28  Deleted:      25
% 1.87/2.28  Deletedinuse: 13
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Intermediate Status:
% 1.87/2.28  Generated:    19805
% 1.87/2.28  Kept:         6048
% 1.87/2.28  Inuse:        195
% 1.87/2.28  Deleted:      50
% 1.87/2.28  Deletedinuse: 35
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Intermediate Status:
% 1.87/2.28  Generated:    26039
% 1.87/2.28  Kept:         8070
% 1.87/2.28  Inuse:        245
% 1.87/2.28  Deleted:      50
% 1.87/2.28  Deletedinuse: 35
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Intermediate Status:
% 1.87/2.28  Generated:    42427
% 1.87/2.28  Kept:         10082
% 1.87/2.28  Inuse:        336
% 1.87/2.28  Deleted:      61
% 1.87/2.28  Deletedinuse: 35
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Intermediate Status:
% 1.87/2.28  Generated:    55204
% 1.87/2.28  Kept:         12375
% 1.87/2.28  Inuse:        372
% 1.87/2.28  Deleted:      70
% 1.87/2.28  Deletedinuse: 36
% 1.87/2.28  
% 1.87/2.28  Resimplifying inuse:
% 1.87/2.28  Done
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  Bliksems!, er is een bewijs:
% 1.87/2.28  % SZS status Unsatisfiable
% 1.87/2.28  % SZS output start Refutation
% 1.87/2.28  
% 1.87/2.28  clause( 0, [ product( identity, X, X ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 1, [ product( X, identity, X ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 2, [ product( inverse( X ), X, identity ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 3, [ product( X, inverse( X ), identity ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 4, [ product( X, Y, multiply( X, Y ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 5, [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), =( Z, T ) ]
% 1.87/2.28     )
% 1.87/2.28  .
% 1.87/2.28  clause( 6, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( product( 
% 1.87/2.28    Z, T, W ) ), product( X, U, W ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 7, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( product( 
% 1.87/2.28    X, U, W ) ), product( Z, T, W ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 8, [ product( a, b, c ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 9, [ product( inverse( b ), inverse( a ), d ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 10, [ ~( product( c, d, identity ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 13, [ ~( product( X, Y, Y ) ), ~( product( Y, Z, T ) ), product( X
% 1.87/2.28    , T, T ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 15, [ ~( product( X, Y, Z ) ), ~( product( Y, T, Y ) ), product( Z
% 1.87/2.28    , T, Z ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 19, [ ~( product( inverse( X ), X, Y ) ), =( identity, Y ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 22, [ ~( product( identity, X, Y ) ), =( X, Y ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 23, [ ~( product( X, identity, Y ) ), =( X, Y ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 71, [ product( a, X, c ), ~( product( identity, b, X ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 82, [ product( X, Y, Y ), ~( product( identity, X, identity ) ) ]
% 1.87/2.28     )
% 1.87/2.28  .
% 1.87/2.28  clause( 92, [ ~( product( inverse( a ), X, Y ) ), ~( product( d, X, Z ) ), 
% 1.87/2.28    product( inverse( b ), Y, Z ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 96, [ ~( product( X, Y, Z ) ), ~( product( Z, T, U ) ), product( X
% 1.87/2.28    , multiply( Y, T ), U ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 98, [ ~( product( X, Y, Z ) ), ~( product( identity, Y, T ) ), 
% 1.87/2.28    product( inverse( X ), Z, T ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 415, [ ~( product( X, Y, Y ) ), product( X, identity, identity ) ]
% 1.87/2.28     )
% 1.87/2.28  .
% 1.87/2.28  clause( 424, [ ~( product( X, Y, Y ) ), =( X, identity ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 464, [ ~( product( c, d, X ) ), ~( product( X, Y, Y ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 527, [ ~( product( multiply( c, d ), X, X ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 566, [ ~( product( identity, multiply( c, d ), identity ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 612, [ ~( product( X, Y, X ) ), product( identity, Y, identity ) ]
% 1.87/2.28     )
% 1.87/2.28  .
% 1.87/2.28  clause( 678, [ ~( product( X, multiply( c, d ), X ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 11772, [ ~( product( X, c, Y ) ), ~( product( Y, d, X ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 11896, [ ~( product( d, c, identity ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 11936, [ ~( product( d, c, X ) ), ~( product( inverse( Y ), Y, X )
% 1.87/2.28     ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 12557, [ ~( product( identity, X, Y ) ), product( inverse( a ), c, 
% 1.87/2.28    Y ), ~( product( identity, b, X ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 12689, [ product( inverse( a ), c, b ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 12699, [ ~( product( d, c, X ) ) ] )
% 1.87/2.28  .
% 1.87/2.28  clause( 12778, [] )
% 1.87/2.28  .
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  % SZS output end Refutation
% 1.87/2.28  found a proof!
% 1.87/2.28  
% 1.87/2.28  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 1.87/2.28  
% 1.87/2.28  initialclauses(
% 1.87/2.28  [ clause( 12780, [ product( identity, X, X ) ] )
% 1.87/2.28  , clause( 12781, [ product( X, identity, X ) ] )
% 1.87/2.28  , clause( 12782, [ product( inverse( X ), X, identity ) ] )
% 1.87/2.28  , clause( 12783, [ product( X, inverse( X ), identity ) ] )
% 1.87/2.28  , clause( 12784, [ product( X, Y, multiply( X, Y ) ) ] )
% 1.87/2.28  , clause( 12785, [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), =( Z, 
% 1.87/2.28    T ) ] )
% 1.87/2.28  , clause( 12786, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( 
% 1.87/2.28    product( Z, T, W ) ), product( X, U, W ) ] )
% 1.87/2.28  , clause( 12787, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( 
% 1.87/2.28    product( X, U, W ) ), product( Z, T, W ) ] )
% 1.87/2.28  , clause( 12788, [ product( a, b, c ) ] )
% 1.87/2.28  , clause( 12789, [ product( inverse( b ), inverse( a ), d ) ] )
% 1.87/2.28  , clause( 12790, [ ~( product( c, d, identity ) ) ] )
% 1.87/2.28  ] ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 0, [ product( identity, X, X ) ] )
% 1.87/2.28  , clause( 12780, [ product( identity, X, X ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 1, [ product( X, identity, X ) ] )
% 1.87/2.28  , clause( 12781, [ product( X, identity, X ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 2, [ product( inverse( X ), X, identity ) ] )
% 1.87/2.28  , clause( 12782, [ product( inverse( X ), X, identity ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 3, [ product( X, inverse( X ), identity ) ] )
% 1.87/2.28  , clause( 12783, [ product( X, inverse( X ), identity ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 4, [ product( X, Y, multiply( X, Y ) ) ] )
% 1.87/2.28  , clause( 12784, [ product( X, Y, multiply( X, Y ) ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.87/2.28     )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 5, [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), =( Z, T ) ]
% 1.87/2.28     )
% 1.87/2.28  , clause( 12785, [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), =( Z, 
% 1.87/2.28    T ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 1.87/2.28    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 6, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( product( 
% 1.87/2.28    Z, T, W ) ), product( X, U, W ) ] )
% 1.87/2.28  , clause( 12786, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( 
% 1.87/2.28    product( Z, T, W ) ), product( X, U, W ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 1.87/2.28    , U ), :=( W, W )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 1.87/2.28    , 2 ), ==>( 3, 3 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 7, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( product( 
% 1.87/2.28    X, U, W ) ), product( Z, T, W ) ] )
% 1.87/2.28  , clause( 12787, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( 
% 1.87/2.28    product( X, U, W ) ), product( Z, T, W ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 1.87/2.28    , U ), :=( W, W )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2
% 1.87/2.28    , 2 ), ==>( 3, 3 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 8, [ product( a, b, c ) ] )
% 1.87/2.28  , clause( 12788, [ product( a, b, c ) ] )
% 1.87/2.28  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 9, [ product( inverse( b ), inverse( a ), d ) ] )
% 1.87/2.28  , clause( 12789, [ product( inverse( b ), inverse( a ), d ) ] )
% 1.87/2.28  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 10, [ ~( product( c, d, identity ) ) ] )
% 1.87/2.28  , clause( 12790, [ ~( product( c, d, identity ) ) ] )
% 1.87/2.28  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  factor(
% 1.87/2.28  clause( 12835, [ ~( product( X, Y, Y ) ), ~( product( Y, Z, T ) ), product( 
% 1.87/2.28    X, T, T ) ] )
% 1.87/2.28  , clause( 6, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( product( 
% 1.87/2.28    Z, T, W ) ), product( X, U, W ) ] )
% 1.87/2.28  , 1, 2, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Y ), :=( T, Z ), 
% 1.87/2.28    :=( U, T ), :=( W, T )] )).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 13, [ ~( product( X, Y, Y ) ), ~( product( Y, Z, T ) ), product( X
% 1.87/2.28    , T, T ) ] )
% 1.87/2.28  , clause( 12835, [ ~( product( X, Y, Y ) ), ~( product( Y, Z, T ) ), 
% 1.87/2.28    product( X, T, T ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 1.87/2.28    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  factor(
% 1.87/2.28  clause( 12838, [ ~( product( X, Y, Z ) ), ~( product( Y, T, Y ) ), product( 
% 1.87/2.28    Z, T, Z ) ] )
% 1.87/2.28  , clause( 7, [ ~( product( X, Y, Z ) ), ~( product( Y, T, U ) ), ~( product( 
% 1.87/2.28    X, U, W ) ), product( Z, T, W ) ] )
% 1.87/2.28  , 0, 2, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), 
% 1.87/2.28    :=( U, Y ), :=( W, Z )] )).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 15, [ ~( product( X, Y, Z ) ), ~( product( Y, T, Y ) ), product( Z
% 1.87/2.28    , T, Z ) ] )
% 1.87/2.28  , clause( 12838, [ ~( product( X, Y, Z ) ), ~( product( Y, T, Y ) ), 
% 1.87/2.28    product( Z, T, Z ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 1.87/2.28    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  resolution(
% 1.87/2.28  clause( 12841, [ ~( product( inverse( X ), X, Y ) ), =( identity, Y ) ] )
% 1.87/2.28  , clause( 5, [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), =( Z, T )
% 1.87/2.28     ] )
% 1.87/2.28  , 0, clause( 2, [ product( inverse( X ), X, identity ) ] )
% 1.87/2.28  , 0, substitution( 0, [ :=( X, inverse( X ) ), :=( Y, X ), :=( Z, identity
% 1.87/2.28     ), :=( T, Y )] ), substitution( 1, [ :=( X, X )] )).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 19, [ ~( product( inverse( X ), X, Y ) ), =( identity, Y ) ] )
% 1.87/2.28  , clause( 12841, [ ~( product( inverse( X ), X, Y ) ), =( identity, Y ) ]
% 1.87/2.28     )
% 1.87/2.28  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.87/2.28     ), ==>( 1, 1 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  resolution(
% 1.87/2.28  clause( 12843, [ ~( product( identity, X, Y ) ), =( X, Y ) ] )
% 1.87/2.28  , clause( 5, [ ~( product( X, Y, Z ) ), ~( product( X, Y, T ) ), =( Z, T )
% 1.87/2.28     ] )
% 1.87/2.28  , 0, clause( 0, [ product( identity, X, X ) ] )
% 1.87/2.28  , 0, substitution( 0, [ :=( X, identity ), :=( Y, X ), :=( Z, X ), :=( T, Y
% 1.87/2.28     )] ), substitution( 1, [ :=( X, X )] )).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  subsumption(
% 1.87/2.28  clause( 22, [ ~( product( identity, X, Y ) ), =( X, Y ) ] )
% 1.87/2.28  , clause( 12843, [ ~( product( identity, X, Y ) ), =( X, Y ) ] )
% 1.87/2.28  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.87/2.28     ), ==>( 1, 1 )] ) ).
% 1.87/2.28  
% 1.87/2.28  
% 1.87/2.28  resolution(
% 1.87/2.28  clause( 12845, [ ~( product( X, identity, Y )Cputime limit exceeded (core dumped)
%------------------------------------------------------------------------------