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Bliksem---1.12.THM-Ref.s

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%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : GEO266+3 : TPTP v8.1.0. Released v4.0.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n010.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 02:53:25 EDT 2022

% Result   : Theorem 0.72s 1.09s
% Output   : Refutation 0.72s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12  % Problem  : GEO266+3 : TPTP v8.1.0. Released v4.0.0.
% 0.07/0.13  % Command  : bliksem %s
% 0.14/0.34  % Computer : n010.cluster.edu
% 0.14/0.34  % Model    : x86_64 x86_64
% 0.14/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.34  % Memory   : 8042.1875MB
% 0.14/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.14/0.34  % CPULimit : 300
% 0.14/0.34  % DateTime : Sat Jun 18 05:18:53 EDT 2022
% 0.14/0.34  % CPUTime  : 
% 0.72/1.08  *** allocated 10000 integers for termspace/termends
% 0.72/1.08  *** allocated 10000 integers for clauses
% 0.72/1.08  *** allocated 10000 integers for justifications
% 0.72/1.08  Bliksem 1.12
% 0.72/1.08  
% 0.72/1.08  
% 0.72/1.08  Automatic Strategy Selection
% 0.72/1.08  
% 0.72/1.08  
% 0.72/1.08  Clauses:
% 0.72/1.08  
% 0.72/1.08  { ! unequally_directed_opposite_lines( X, Y ), unequally_directed_lines( X
% 0.72/1.08    , reverse_line( Y ) ) }.
% 0.72/1.08  { ! unequally_directed_lines( X, reverse_line( Y ) ), 
% 0.72/1.08    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.08  { ! right_apart_point( X, Y ), left_apart_point( X, reverse_line( Y ) ) }.
% 0.72/1.08  { ! left_apart_point( X, reverse_line( Y ) ), right_apart_point( X, Y ) }.
% 0.72/1.08  { ! right_convergent_lines( X, Y ), left_convergent_lines( X, reverse_line
% 0.72/1.08    ( Y ) ) }.
% 0.72/1.08  { ! left_convergent_lines( X, reverse_line( Y ) ), right_convergent_lines( 
% 0.72/1.08    X, Y ) }.
% 0.72/1.08  { ! equally_directed_lines( X, Y ), ! unequally_directed_lines( X, Y ) }.
% 0.72/1.08  { unequally_directed_lines( X, Y ), equally_directed_lines( X, Y ) }.
% 0.72/1.08  { ! equally_directed_opposite_lines( X, Y ), ! 
% 0.72/1.08    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.08  { unequally_directed_opposite_lines( X, Y ), 
% 0.72/1.08    equally_directed_opposite_lines( X, Y ) }.
% 0.72/1.08  { ! apart_point_and_line( X, Y ), left_apart_point( X, Y ), 
% 0.72/1.08    right_apart_point( X, Y ) }.
% 0.72/1.08  { ! left_apart_point( X, Y ), apart_point_and_line( X, Y ) }.
% 0.72/1.08  { ! right_apart_point( X, Y ), apart_point_and_line( X, Y ) }.
% 0.72/1.08  { ! convergent_lines( X, Y ), unequally_directed_lines( X, Y ) }.
% 0.72/1.08  { ! convergent_lines( X, Y ), unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.08  { ! unequally_directed_lines( X, Y ), ! unequally_directed_opposite_lines( 
% 0.72/1.08    X, Y ), convergent_lines( X, Y ) }.
% 0.72/1.08  { ! divides_points( Z, X, Y ), alpha1( X, Y, Z ), alpha4( X, Y, Z ) }.
% 0.72/1.08  { ! alpha1( X, Y, Z ), divides_points( Z, X, Y ) }.
% 0.72/1.08  { ! alpha4( X, Y, Z ), divides_points( Z, X, Y ) }.
% 0.72/1.08  { ! alpha4( X, Y, Z ), right_apart_point( X, Z ) }.
% 0.72/1.08  { ! alpha4( X, Y, Z ), left_apart_point( Y, Z ) }.
% 0.72/1.08  { ! right_apart_point( X, Z ), ! left_apart_point( Y, Z ), alpha4( X, Y, Z
% 0.72/1.08     ) }.
% 0.72/1.08  { ! alpha1( X, Y, Z ), left_apart_point( X, Z ) }.
% 0.72/1.08  { ! alpha1( X, Y, Z ), right_apart_point( Y, Z ) }.
% 0.72/1.08  { ! left_apart_point( X, Z ), ! right_apart_point( Y, Z ), alpha1( X, Y, Z
% 0.72/1.08     ) }.
% 0.72/1.08  { ! before_on_line( X, Y, Z ), distinct_points( Y, Z ) }.
% 0.72/1.08  { ! before_on_line( X, Y, Z ), alpha2( X, Y, Z ) }.
% 0.72/1.08  { ! distinct_points( Y, Z ), ! alpha2( X, Y, Z ), before_on_line( X, Y, Z )
% 0.72/1.08     }.
% 0.72/1.08  { ! alpha2( X, Y, Z ), incident_point_and_line( Y, X ) }.
% 0.72/1.08  { ! alpha2( X, Y, Z ), alpha5( X, Y, Z ) }.
% 0.72/1.08  { ! incident_point_and_line( Y, X ), ! alpha5( X, Y, Z ), alpha2( X, Y, Z )
% 0.72/1.08     }.
% 0.72/1.08  { ! alpha5( X, Y, Z ), incident_point_and_line( Z, X ) }.
% 0.72/1.08  { ! alpha5( X, Y, Z ), equally_directed_lines( X, line_connecting( Y, Z ) )
% 0.72/1.08     }.
% 0.72/1.08  { ! incident_point_and_line( Z, X ), ! equally_directed_lines( X, 
% 0.72/1.08    line_connecting( Y, Z ) ), alpha5( X, Y, Z ) }.
% 0.72/1.08  { ! between_on_line( X, Y, Z, T ), alpha3( X, Y, Z, T ), alpha6( X, Y, Z, T
% 0.72/1.08     ) }.
% 0.72/1.08  { ! alpha3( X, Y, Z, T ), between_on_line( X, Y, Z, T ) }.
% 0.72/1.08  { ! alpha6( X, Y, Z, T ), between_on_line( X, Y, Z, T ) }.
% 0.72/1.08  { ! alpha6( X, Y, Z, T ), before_on_line( X, T, Z ) }.
% 0.72/1.08  { ! alpha6( X, Y, Z, T ), before_on_line( X, Z, Y ) }.
% 0.72/1.08  { ! before_on_line( X, T, Z ), ! before_on_line( X, Z, Y ), alpha6( X, Y, Z
% 0.72/1.08    , T ) }.
% 0.72/1.08  { ! alpha3( X, Y, Z, T ), before_on_line( X, Y, Z ) }.
% 0.72/1.08  { ! alpha3( X, Y, Z, T ), before_on_line( X, Z, T ) }.
% 0.72/1.08  { ! before_on_line( X, Y, Z ), ! before_on_line( X, Z, T ), alpha3( X, Y, Z
% 0.72/1.08    , T ) }.
% 0.72/1.08  { ! distinct_points( X, X ) }.
% 0.72/1.08  { ! distinct_points( X, Y ), distinct_points( X, Z ), distinct_points( Y, Z
% 0.72/1.08     ) }.
% 0.72/1.08  { ! distinct_lines( X, X ) }.
% 0.72/1.08  { ! distinct_lines( X, Y ), distinct_lines( X, Z ), distinct_lines( Y, Z )
% 0.72/1.08     }.
% 0.72/1.08  { equally_directed_lines( X, X ) }.
% 0.72/1.08  { ! unequally_directed_lines( X, Y ), unequally_directed_lines( X, Z ), 
% 0.72/1.08    unequally_directed_lines( Y, Z ) }.
% 0.72/1.08  { ! unequally_directed_lines( X, Y ), ! unequally_directed_lines( X, 
% 0.72/1.08    reverse_line( Y ) ), alpha7( X, Z ), unequally_directed_lines( Y, Z ) }.
% 0.72/1.08  { ! unequally_directed_lines( X, Y ), ! unequally_directed_lines( X, 
% 0.72/1.08    reverse_line( Y ) ), alpha7( X, Z ), unequally_directed_lines( Y, 
% 0.72/1.08    reverse_line( Z ) ) }.
% 0.72/1.08  { ! alpha7( X, Y ), unequally_directed_lines( X, Y ) }.
% 0.72/1.08  { ! alpha7( X, Y ), unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  { ! unequally_directed_lines( X, Y ), ! unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ), alpha7( X, Y ) }.
% 0.72/1.09  { unequally_directed_lines( X, Y ), unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ) }.
% 0.72/1.09  { ! unequally_directed_lines( X, Y ), ! unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ), left_convergent_lines( X, Y ), left_convergent_lines
% 0.72/1.09    ( X, reverse_line( Y ) ) }.
% 0.72/1.09  { ! left_apart_point( X, Y ) }.
% 0.72/1.09  { ! left_apart_point( X, reverse_line( Y ) ) }.
% 0.72/1.09  { ! left_convergent_lines( X, Y ) }.
% 0.72/1.09  { ! left_convergent_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  { ! point( X ), ! point( Y ), ! distinct_points( X, Y ), line( 
% 0.72/1.09    line_connecting( X, Y ) ) }.
% 0.72/1.09  { ! line( X ), ! line( Y ), ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), point( 
% 0.72/1.09    intersection_point( X, Y ) ) }.
% 0.72/1.09  { ! point( Y ), ! line( X ), line( parallel_through_point( X, Y ) ) }.
% 0.72/1.09  { ! line( X ), line( reverse_line( X ) ) }.
% 0.72/1.09  { ! distinct_points( X, Y ), ! apart_point_and_line( X, line_connecting( X
% 0.72/1.09    , Y ) ) }.
% 0.72/1.09  { ! distinct_points( X, Y ), ! apart_point_and_line( Y, line_connecting( X
% 0.72/1.09    , Y ) ) }.
% 0.72/1.09  { ! unequally_directed_lines( X, Y ), ! unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ), ! apart_point_and_line( intersection_point( X, Y ), 
% 0.72/1.09    X ) }.
% 0.72/1.09  { ! unequally_directed_lines( X, Y ), ! unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ), ! apart_point_and_line( intersection_point( X, Y ), 
% 0.72/1.09    Y ) }.
% 0.72/1.09  { ! apart_point_and_line( X, parallel_through_point( Y, X ) ) }.
% 0.72/1.09  { ! distinct_lines( X, reverse_line( X ) ) }.
% 0.72/1.09  { ! distinct_points( X, Y ), equally_directed_lines( line_connecting( X, Y
% 0.72/1.09     ), reverse_line( line_connecting( Y, X ) ) ) }.
% 0.72/1.09  { equally_directed_lines( parallel_through_point( Y, X ), Y ) }.
% 0.72/1.09  { ! distinct_points( X, Y ), ! distinct_lines( Z, T ), left_apart_point( X
% 0.72/1.09    , Z ), left_apart_point( Y, Z ), left_apart_point( X, T ), 
% 0.72/1.09    left_apart_point( Y, T ), left_apart_point( X, reverse_line( Z ) ), 
% 0.72/1.09    left_apart_point( Y, reverse_line( Z ) ), left_apart_point( X, 
% 0.72/1.09    reverse_line( T ) ), left_apart_point( Y, reverse_line( T ) ) }.
% 0.72/1.09  { ! distinct_points( X, Y ), ! left_apart_point( X, Z ), left_apart_point( 
% 0.72/1.09    Y, Z ), left_convergent_lines( line_connecting( X, Y ), Z ) }.
% 0.72/1.09  { ! left_apart_point( X, Y ), distinct_points( X, Z ), left_apart_point( Z
% 0.72/1.09    , Y ) }.
% 0.72/1.09  { ! left_apart_point( X, Y ), ! unequally_directed_lines( Y, Z ), 
% 0.72/1.09    distinct_lines( Y, Z ), left_apart_point( X, reverse_line( Z ) ) }.
% 0.72/1.09  { ! left_convergent_lines( X, Y ), unequally_directed_lines( Y, Z ), 
% 0.72/1.09    left_convergent_lines( X, Z ) }.
% 0.72/1.09  { alpha8( skol1, skol2 ), unequally_directed_opposite_lines( skol2, skol1 )
% 0.72/1.09     }.
% 0.72/1.09  { alpha8( skol1, skol2 ), ! unequally_directed_opposite_lines( skol1, skol2
% 0.72/1.09     ) }.
% 0.72/1.09  { ! alpha8( X, Y ), unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  { ! alpha8( X, Y ), ! unequally_directed_opposite_lines( Y, X ) }.
% 0.72/1.09  { ! unequally_directed_opposite_lines( X, Y ), 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ), alpha8( X, Y ) }.
% 0.72/1.09  
% 0.72/1.09  percentage equality = 0.000000, percentage horn = 0.802632
% 0.72/1.09  This a non-horn, non-equality problem
% 0.72/1.09  
% 0.72/1.09  
% 0.72/1.09  Options Used:
% 0.72/1.09  
% 0.72/1.09  useres =            1
% 0.72/1.09  useparamod =        0
% 0.72/1.09  useeqrefl =         0
% 0.72/1.09  useeqfact =         0
% 0.72/1.09  usefactor =         1
% 0.72/1.09  usesimpsplitting =  0
% 0.72/1.09  usesimpdemod =      0
% 0.72/1.09  usesimpres =        3
% 0.72/1.09  
% 0.72/1.09  resimpinuse      =  1000
% 0.72/1.09  resimpclauses =     20000
% 0.72/1.09  substype =          standard
% 0.72/1.09  backwardsubs =      1
% 0.72/1.09  selectoldest =      5
% 0.72/1.09  
% 0.72/1.09  litorderings [0] =  split
% 0.72/1.09  litorderings [1] =  liftord
% 0.72/1.09  
% 0.72/1.09  termordering =      none
% 0.72/1.09  
% 0.72/1.09  litapriori =        1
% 0.72/1.09  termapriori =       0
% 0.72/1.09  litaposteriori =    0
% 0.72/1.09  termaposteriori =   0
% 0.72/1.09  demodaposteriori =  0
% 0.72/1.09  ordereqreflfact =   0
% 0.72/1.09  
% 0.72/1.09  litselect =         none
% 0.72/1.09  
% 0.72/1.09  maxweight =         15
% 0.72/1.09  maxdepth =          30000
% 0.72/1.09  maxlength =         115
% 0.72/1.09  maxnrvars =         195
% 0.72/1.09  excuselevel =       1
% 0.72/1.09  increasemaxweight = 1
% 0.72/1.09  
% 0.72/1.09  maxselected =       10000000
% 0.72/1.09  maxnrclauses =      10000000
% 0.72/1.09  
% 0.72/1.09  showgenerated =    0
% 0.72/1.09  showkept =         0
% 0.72/1.09  showselected =     0
% 0.72/1.09  showdeleted =      0
% 0.72/1.09  showresimp =       1
% 0.72/1.09  showstatus =       2000
% 0.72/1.09  
% 0.72/1.09  prologoutput =     0
% 0.72/1.09  nrgoals =          5000000
% 0.72/1.09  totalproof =       1
% 0.72/1.09  
% 0.72/1.09  Symbols occurring in the translation:
% 0.72/1.09  
% 0.72/1.09  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 0.72/1.09  .  [1, 2]      (w:1, o:24, a:1, s:1, b:0), 
% 0.72/1.09  !  [4, 1]      (w:0, o:16, a:1, s:1, b:0), 
% 0.72/1.09  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.72/1.09  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.72/1.09  unequally_directed_opposite_lines  [37, 2]      (w:1, o:48, a:1, s:1, b:0)
% 0.72/1.09    , 
% 0.72/1.09  reverse_line  [38, 1]      (w:1, o:21, a:1, s:1, b:0), 
% 0.72/1.09  unequally_directed_lines  [39, 2]      (w:1, o:49, a:1, s:1, b:0), 
% 0.72/1.09  right_apart_point  [40, 2]      (w:1, o:50, a:1, s:1, b:0), 
% 0.72/1.09  left_apart_point  [41, 2]      (w:1, o:51, a:1, s:1, b:0), 
% 0.72/1.09  right_convergent_lines  [42, 2]      (w:1, o:52, a:1, s:1, b:0), 
% 0.72/1.09  left_convergent_lines  [43, 2]      (w:1, o:53, a:1, s:1, b:0), 
% 0.72/1.09  equally_directed_lines  [44, 2]      (w:1, o:56, a:1, s:1, b:0), 
% 0.72/1.09  equally_directed_opposite_lines  [45, 2]      (w:1, o:57, a:1, s:1, b:0), 
% 0.72/1.09  apart_point_and_line  [48, 2]      (w:1, o:58, a:1, s:1, b:0), 
% 0.72/1.09  convergent_lines  [50, 2]      (w:1, o:59, a:1, s:1, b:0), 
% 0.72/1.09  divides_points  [52, 3]      (w:1, o:66, a:1, s:1, b:0), 
% 0.72/1.09  before_on_line  [53, 3]      (w:1, o:71, a:1, s:1, b:0), 
% 0.72/1.09  distinct_points  [54, 2]      (w:1, o:54, a:1, s:1, b:0), 
% 0.72/1.09  incident_point_and_line  [55, 2]      (w:1, o:60, a:1, s:1, b:0), 
% 0.72/1.09  line_connecting  [56, 2]      (w:1, o:61, a:1, s:1, b:0), 
% 0.72/1.09  between_on_line  [58, 4]      (w:1, o:74, a:1, s:1, b:0), 
% 0.72/1.09  distinct_lines  [59, 2]      (w:1, o:55, a:1, s:1, b:0), 
% 0.72/1.09  point  [61, 1]      (w:1, o:22, a:1, s:1, b:0), 
% 0.72/1.09  line  [62, 1]      (w:1, o:23, a:1, s:1, b:0), 
% 0.72/1.09  intersection_point  [63, 2]      (w:1, o:62, a:1, s:1, b:0), 
% 0.72/1.09  parallel_through_point  [64, 2]      (w:1, o:63, a:1, s:1, b:0), 
% 0.72/1.09  alpha1  [65, 3]      (w:1, o:67, a:1, s:1, b:0), 
% 0.72/1.09  alpha2  [66, 3]      (w:1, o:68, a:1, s:1, b:0), 
% 0.72/1.09  alpha3  [67, 4]      (w:1, o:72, a:1, s:1, b:0), 
% 0.72/1.09  alpha4  [68, 3]      (w:1, o:69, a:1, s:1, b:0), 
% 0.72/1.09  alpha5  [69, 3]      (w:1, o:70, a:1, s:1, b:0), 
% 0.72/1.09  alpha6  [70, 4]      (w:1, o:73, a:1, s:1, b:0), 
% 0.72/1.09  alpha7  [71, 2]      (w:1, o:64, a:1, s:1, b:0), 
% 0.72/1.09  alpha8  [72, 2]      (w:1, o:65, a:1, s:1, b:0), 
% 0.72/1.09  skol1  [73, 0]      (w:1, o:14, a:1, s:1, b:0), 
% 0.72/1.09  skol2  [74, 0]      (w:1, o:15, a:1, s:1, b:0).
% 0.72/1.09  
% 0.72/1.09  
% 0.72/1.09  Starting Search:
% 0.72/1.09  
% 0.72/1.09  *** allocated 15000 integers for clauses
% 0.72/1.09  *** allocated 22500 integers for clauses
% 0.72/1.09  
% 0.72/1.09  Bliksems!, er is een bewijs:
% 0.72/1.09  % SZS status Theorem
% 0.72/1.09  % SZS output start Refutation
% 0.72/1.09  
% 0.72/1.09  (0) {G0,W7,D3,L2,V2,M1} I { ! unequally_directed_opposite_lines( X, Y ), 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  (1) {G0,W7,D3,L2,V2,M1} I { unequally_directed_opposite_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  (6) {G0,W6,D2,L2,V2,M1} I { ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    equally_directed_lines( X, Y ) }.
% 0.72/1.09  (47) {G0,W3,D2,L1,V1,M1} I { equally_directed_lines( X, X ) }.
% 0.72/1.09  (48) {G0,W9,D2,L3,V3,M3} I { unequally_directed_lines( X, Z ), 
% 0.72/1.09    unequally_directed_lines( Y, Z ), ! unequally_directed_lines( X, Y ) }.
% 0.72/1.09  (54) {G0,W7,D3,L2,V2,M2} I { unequally_directed_lines( X, reverse_line( Y )
% 0.72/1.09     ), unequally_directed_lines( X, Y ) }.
% 0.72/1.09  (55) {G0,W14,D3,L4,V2,M2} I { ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), left_convergent_lines( 
% 0.72/1.09    X, reverse_line( Y ) ), left_convergent_lines( X, Y ) }.
% 0.72/1.09  (57) {G0,W3,D2,L1,V2,M1} I { ! left_convergent_lines( X, Y ) }.
% 0.72/1.09  (71) {G0,W6,D2,L2,V0,M1} I { unequally_directed_opposite_lines( skol2, 
% 0.72/1.09    skol1 ), alpha8( skol1, skol2 ) }.
% 0.72/1.09  (72) {G0,W6,D2,L2,V0,M1} I { ! unequally_directed_opposite_lines( skol1, 
% 0.72/1.09    skol2 ), alpha8( skol1, skol2 ) }.
% 0.72/1.09  (73) {G0,W6,D2,L2,V2,M1} I { unequally_directed_opposite_lines( X, Y ), ! 
% 0.72/1.09    alpha8( X, Y ) }.
% 0.72/1.09  (74) {G0,W6,D2,L2,V2,M1} I { ! unequally_directed_opposite_lines( Y, X ), !
% 0.72/1.09     alpha8( X, Y ) }.
% 0.72/1.09  (87) {G1,W3,D2,L1,V1,M1} R(6,47) { ! unequally_directed_lines( X, X ) }.
% 0.72/1.09  (90) {G1,W6,D2,L2,V0,M1} R(72,74) { ! unequally_directed_opposite_lines( 
% 0.72/1.09    skol2, skol1 ), ! unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  (92) {G1,W6,D2,L2,V0,M1} R(71,73) { unequally_directed_opposite_lines( 
% 0.72/1.09    skol2, skol1 ), unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  (102) {G1,W6,D2,L2,V2,M1} R(54,1) { unequally_directed_opposite_lines( X, Y
% 0.72/1.09     ), unequally_directed_lines( X, Y ) }.
% 0.72/1.09  (139) {G2,W6,D2,L2,V2,M2} R(48,87) { ! unequally_directed_lines( Y, X ), 
% 0.72/1.09    unequally_directed_lines( X, Y ) }.
% 0.72/1.09  (148) {G3,W6,D2,L2,V2,M1} R(139,102) { unequally_directed_opposite_lines( Y
% 0.72/1.09    , X ), unequally_directed_lines( X, Y ) }.
% 0.72/1.09  (315) {G1,W7,D3,L2,V2,M2} S(55);r(57);r(57) { ! unequally_directed_lines( X
% 0.72/1.09    , reverse_line( Y ) ), ! unequally_directed_lines( X, Y ) }.
% 0.72/1.09  (359) {G2,W6,D2,L2,V2,M1} R(315,0) { ! unequally_directed_opposite_lines( X
% 0.72/1.09    , Y ), ! unequally_directed_lines( X, Y ) }.
% 0.72/1.09  (391) {G4,W6,D2,L2,V2,M2} R(359,148) { unequally_directed_opposite_lines( Y
% 0.72/1.09    , X ), ! unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  (404) {G5,W3,D2,L1,V0,M1} R(391,92);f { unequally_directed_opposite_lines( 
% 0.72/1.09    skol2, skol1 ) }.
% 0.72/1.09  (405) {G6,W0,D0,L0,V0,M0} R(391,90);f;r(404) {  }.
% 0.72/1.09  
% 0.72/1.09  
% 0.72/1.09  % SZS output end Refutation
% 0.72/1.09  found a proof!
% 0.72/1.09  
% 0.72/1.09  *** allocated 33750 integers for clauses
% 0.72/1.09  
% 0.72/1.09  Unprocessed initial clauses:
% 0.72/1.09  
% 0.72/1.09  (407) {G0,W7,D3,L2,V2,M2}  { ! unequally_directed_opposite_lines( X, Y ), 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  (408) {G0,W7,D3,L2,V2,M2}  { ! unequally_directed_lines( X, reverse_line( Y
% 0.72/1.09     ) ), unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  (409) {G0,W7,D3,L2,V2,M2}  { ! right_apart_point( X, Y ), left_apart_point
% 0.72/1.09    ( X, reverse_line( Y ) ) }.
% 0.72/1.09  (410) {G0,W7,D3,L2,V2,M2}  { ! left_apart_point( X, reverse_line( Y ) ), 
% 0.72/1.09    right_apart_point( X, Y ) }.
% 0.72/1.09  (411) {G0,W7,D3,L2,V2,M2}  { ! right_convergent_lines( X, Y ), 
% 0.72/1.09    left_convergent_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  (412) {G0,W7,D3,L2,V2,M2}  { ! left_convergent_lines( X, reverse_line( Y )
% 0.72/1.09     ), right_convergent_lines( X, Y ) }.
% 0.72/1.09  (413) {G0,W6,D2,L2,V2,M2}  { ! equally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, Y ) }.
% 0.72/1.09  (414) {G0,W6,D2,L2,V2,M2}  { unequally_directed_lines( X, Y ), 
% 0.72/1.09    equally_directed_lines( X, Y ) }.
% 0.72/1.09  (415) {G0,W6,D2,L2,V2,M2}  { ! equally_directed_opposite_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  (416) {G0,W6,D2,L2,V2,M2}  { unequally_directed_opposite_lines( X, Y ), 
% 0.72/1.09    equally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  (417) {G0,W9,D2,L3,V2,M3}  { ! apart_point_and_line( X, Y ), 
% 0.72/1.09    left_apart_point( X, Y ), right_apart_point( X, Y ) }.
% 0.72/1.09  (418) {G0,W6,D2,L2,V2,M2}  { ! left_apart_point( X, Y ), 
% 0.72/1.09    apart_point_and_line( X, Y ) }.
% 0.72/1.09  (419) {G0,W6,D2,L2,V2,M2}  { ! right_apart_point( X, Y ), 
% 0.72/1.09    apart_point_and_line( X, Y ) }.
% 0.72/1.09  (420) {G0,W6,D2,L2,V2,M2}  { ! convergent_lines( X, Y ), 
% 0.72/1.09    unequally_directed_lines( X, Y ) }.
% 0.72/1.09  (421) {G0,W6,D2,L2,V2,M2}  { ! convergent_lines( X, Y ), 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  (422) {G0,W9,D2,L3,V2,M3}  { ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ), convergent_lines( X, Y ) }.
% 0.72/1.09  (423) {G0,W12,D2,L3,V3,M3}  { ! divides_points( Z, X, Y ), alpha1( X, Y, Z
% 0.72/1.09     ), alpha4( X, Y, Z ) }.
% 0.72/1.09  (424) {G0,W8,D2,L2,V3,M2}  { ! alpha1( X, Y, Z ), divides_points( Z, X, Y )
% 0.72/1.09     }.
% 0.72/1.09  (425) {G0,W8,D2,L2,V3,M2}  { ! alpha4( X, Y, Z ), divides_points( Z, X, Y )
% 0.72/1.09     }.
% 0.72/1.09  (426) {G0,W7,D2,L2,V3,M2}  { ! alpha4( X, Y, Z ), right_apart_point( X, Z )
% 0.72/1.09     }.
% 0.72/1.09  (427) {G0,W7,D2,L2,V3,M2}  { ! alpha4( X, Y, Z ), left_apart_point( Y, Z )
% 0.72/1.09     }.
% 0.72/1.09  (428) {G0,W10,D2,L3,V3,M3}  { ! right_apart_point( X, Z ), ! 
% 0.72/1.09    left_apart_point( Y, Z ), alpha4( X, Y, Z ) }.
% 0.72/1.09  (429) {G0,W7,D2,L2,V3,M2}  { ! alpha1( X, Y, Z ), left_apart_point( X, Z )
% 0.72/1.09     }.
% 0.72/1.09  (430) {G0,W7,D2,L2,V3,M2}  { ! alpha1( X, Y, Z ), right_apart_point( Y, Z )
% 0.72/1.09     }.
% 0.72/1.09  (431) {G0,W10,D2,L3,V3,M3}  { ! left_apart_point( X, Z ), ! 
% 0.72/1.09    right_apart_point( Y, Z ), alpha1( X, Y, Z ) }.
% 0.72/1.09  (432) {G0,W7,D2,L2,V3,M2}  { ! before_on_line( X, Y, Z ), distinct_points( 
% 0.72/1.09    Y, Z ) }.
% 0.72/1.09  (433) {G0,W8,D2,L2,V3,M2}  { ! before_on_line( X, Y, Z ), alpha2( X, Y, Z )
% 0.72/1.09     }.
% 0.72/1.09  (434) {G0,W11,D2,L3,V3,M3}  { ! distinct_points( Y, Z ), ! alpha2( X, Y, Z
% 0.72/1.09     ), before_on_line( X, Y, Z ) }.
% 0.72/1.09  (435) {G0,W7,D2,L2,V3,M2}  { ! alpha2( X, Y, Z ), incident_point_and_line( 
% 0.72/1.09    Y, X ) }.
% 0.72/1.09  (436) {G0,W8,D2,L2,V3,M2}  { ! alpha2( X, Y, Z ), alpha5( X, Y, Z ) }.
% 0.72/1.09  (437) {G0,W11,D2,L3,V3,M3}  { ! incident_point_and_line( Y, X ), ! alpha5( 
% 0.72/1.09    X, Y, Z ), alpha2( X, Y, Z ) }.
% 0.72/1.09  (438) {G0,W7,D2,L2,V3,M2}  { ! alpha5( X, Y, Z ), incident_point_and_line( 
% 0.72/1.09    Z, X ) }.
% 0.72/1.09  (439) {G0,W9,D3,L2,V3,M2}  { ! alpha5( X, Y, Z ), equally_directed_lines( X
% 0.72/1.09    , line_connecting( Y, Z ) ) }.
% 0.72/1.09  (440) {G0,W12,D3,L3,V3,M3}  { ! incident_point_and_line( Z, X ), ! 
% 0.72/1.09    equally_directed_lines( X, line_connecting( Y, Z ) ), alpha5( X, Y, Z )
% 0.72/1.09     }.
% 0.72/1.09  (441) {G0,W15,D2,L3,V4,M3}  { ! between_on_line( X, Y, Z, T ), alpha3( X, Y
% 0.72/1.09    , Z, T ), alpha6( X, Y, Z, T ) }.
% 0.72/1.09  (442) {G0,W10,D2,L2,V4,M2}  { ! alpha3( X, Y, Z, T ), between_on_line( X, Y
% 0.72/1.09    , Z, T ) }.
% 0.72/1.09  (443) {G0,W10,D2,L2,V4,M2}  { ! alpha6( X, Y, Z, T ), between_on_line( X, Y
% 0.72/1.09    , Z, T ) }.
% 0.72/1.09  (444) {G0,W9,D2,L2,V4,M2}  { ! alpha6( X, Y, Z, T ), before_on_line( X, T, 
% 0.72/1.09    Z ) }.
% 0.72/1.09  (445) {G0,W9,D2,L2,V4,M2}  { ! alpha6( X, Y, Z, T ), before_on_line( X, Z, 
% 0.72/1.09    Y ) }.
% 0.72/1.09  (446) {G0,W13,D2,L3,V4,M3}  { ! before_on_line( X, T, Z ), ! before_on_line
% 0.72/1.09    ( X, Z, Y ), alpha6( X, Y, Z, T ) }.
% 0.72/1.09  (447) {G0,W9,D2,L2,V4,M2}  { ! alpha3( X, Y, Z, T ), before_on_line( X, Y, 
% 0.72/1.09    Z ) }.
% 0.72/1.09  (448) {G0,W9,D2,L2,V4,M2}  { ! alpha3( X, Y, Z, T ), before_on_line( X, Z, 
% 0.72/1.09    T ) }.
% 0.72/1.09  (449) {G0,W13,D2,L3,V4,M3}  { ! before_on_line( X, Y, Z ), ! before_on_line
% 0.72/1.09    ( X, Z, T ), alpha3( X, Y, Z, T ) }.
% 0.72/1.09  (450) {G0,W3,D2,L1,V1,M1}  { ! distinct_points( X, X ) }.
% 0.72/1.09  (451) {G0,W9,D2,L3,V3,M3}  { ! distinct_points( X, Y ), distinct_points( X
% 0.72/1.09    , Z ), distinct_points( Y, Z ) }.
% 0.72/1.09  (452) {G0,W3,D2,L1,V1,M1}  { ! distinct_lines( X, X ) }.
% 0.72/1.09  (453) {G0,W9,D2,L3,V3,M3}  { ! distinct_lines( X, Y ), distinct_lines( X, Z
% 0.72/1.09     ), distinct_lines( Y, Z ) }.
% 0.72/1.09  (454) {G0,W3,D2,L1,V1,M1}  { equally_directed_lines( X, X ) }.
% 0.72/1.09  (455) {G0,W9,D2,L3,V3,M3}  { ! unequally_directed_lines( X, Y ), 
% 0.72/1.09    unequally_directed_lines( X, Z ), unequally_directed_lines( Y, Z ) }.
% 0.72/1.09  (456) {G0,W13,D3,L4,V3,M4}  { ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), alpha7( X, Z ), 
% 0.72/1.09    unequally_directed_lines( Y, Z ) }.
% 0.72/1.09  (457) {G0,W14,D3,L4,V3,M4}  { ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), alpha7( X, Z ), 
% 0.72/1.09    unequally_directed_lines( Y, reverse_line( Z ) ) }.
% 0.72/1.09  (458) {G0,W6,D2,L2,V2,M2}  { ! alpha7( X, Y ), unequally_directed_lines( X
% 0.72/1.09    , Y ) }.
% 0.72/1.09  (459) {G0,W7,D3,L2,V2,M2}  { ! alpha7( X, Y ), unequally_directed_lines( X
% 0.72/1.09    , reverse_line( Y ) ) }.
% 0.72/1.09  (460) {G0,W10,D3,L3,V2,M3}  { ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), alpha7( X, Y ) }.
% 0.72/1.09  (461) {G0,W7,D3,L2,V2,M2}  { unequally_directed_lines( X, Y ), 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  (462) {G0,W14,D3,L4,V2,M4}  { ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), left_convergent_lines( 
% 0.72/1.09    X, Y ), left_convergent_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  (463) {G0,W3,D2,L1,V2,M1}  { ! left_apart_point( X, Y ) }.
% 0.72/1.09  (464) {G0,W4,D3,L1,V2,M1}  { ! left_apart_point( X, reverse_line( Y ) ) }.
% 0.72/1.09  (465) {G0,W3,D2,L1,V2,M1}  { ! left_convergent_lines( X, Y ) }.
% 0.72/1.09  (466) {G0,W4,D3,L1,V2,M1}  { ! left_convergent_lines( X, reverse_line( Y )
% 0.72/1.09     ) }.
% 0.72/1.09  (467) {G0,W11,D3,L4,V2,M4}  { ! point( X ), ! point( Y ), ! distinct_points
% 0.72/1.09    ( X, Y ), line( line_connecting( X, Y ) ) }.
% 0.72/1.09  (468) {G0,W15,D3,L5,V2,M5}  { ! line( X ), ! line( Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, Y ), ! unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ), point( intersection_point( X, Y ) ) }.
% 0.72/1.09  (469) {G0,W8,D3,L3,V2,M3}  { ! point( Y ), ! line( X ), line( 
% 0.72/1.09    parallel_through_point( X, Y ) ) }.
% 0.72/1.09  (470) {G0,W5,D3,L2,V1,M2}  { ! line( X ), line( reverse_line( X ) ) }.
% 0.72/1.09  (471) {G0,W8,D3,L2,V2,M2}  { ! distinct_points( X, Y ), ! 
% 0.72/1.09    apart_point_and_line( X, line_connecting( X, Y ) ) }.
% 0.72/1.09  (472) {G0,W8,D3,L2,V2,M2}  { ! distinct_points( X, Y ), ! 
% 0.72/1.09    apart_point_and_line( Y, line_connecting( X, Y ) ) }.
% 0.72/1.09  (473) {G0,W12,D3,L3,V2,M3}  { ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), ! apart_point_and_line
% 0.72/1.09    ( intersection_point( X, Y ), X ) }.
% 0.72/1.09  (474) {G0,W12,D3,L3,V2,M3}  { ! unequally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), ! apart_point_and_line
% 0.72/1.09    ( intersection_point( X, Y ), Y ) }.
% 0.72/1.09  (475) {G0,W5,D3,L1,V2,M1}  { ! apart_point_and_line( X, 
% 0.72/1.09    parallel_through_point( Y, X ) ) }.
% 0.72/1.09  (476) {G0,W4,D3,L1,V1,M1}  { ! distinct_lines( X, reverse_line( X ) ) }.
% 0.72/1.09  (477) {G0,W11,D4,L2,V2,M2}  { ! distinct_points( X, Y ), 
% 0.72/1.09    equally_directed_lines( line_connecting( X, Y ), reverse_line( 
% 0.72/1.09    line_connecting( Y, X ) ) ) }.
% 0.72/1.09  (478) {G0,W5,D3,L1,V2,M1}  { equally_directed_lines( parallel_through_point
% 0.72/1.09    ( Y, X ), Y ) }.
% 0.72/1.09  (479) {G0,W34,D3,L10,V4,M10}  { ! distinct_points( X, Y ), ! distinct_lines
% 0.72/1.09    ( Z, T ), left_apart_point( X, Z ), left_apart_point( Y, Z ), 
% 0.72/1.09    left_apart_point( X, T ), left_apart_point( Y, T ), left_apart_point( X, 
% 0.72/1.09    reverse_line( Z ) ), left_apart_point( Y, reverse_line( Z ) ), 
% 0.72/1.09    left_apart_point( X, reverse_line( T ) ), left_apart_point( Y, 
% 0.72/1.09    reverse_line( T ) ) }.
% 0.72/1.09  (480) {G0,W14,D3,L4,V3,M4}  { ! distinct_points( X, Y ), ! left_apart_point
% 0.72/1.09    ( X, Z ), left_apart_point( Y, Z ), left_convergent_lines( 
% 0.72/1.09    line_connecting( X, Y ), Z ) }.
% 0.72/1.09  (481) {G0,W9,D2,L3,V3,M3}  { ! left_apart_point( X, Y ), distinct_points( X
% 0.72/1.09    , Z ), left_apart_point( Z, Y ) }.
% 0.72/1.09  (482) {G0,W13,D3,L4,V3,M4}  { ! left_apart_point( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( Y, Z ), distinct_lines( Y, Z ), 
% 0.72/1.09    left_apart_point( X, reverse_line( Z ) ) }.
% 0.72/1.09  (483) {G0,W9,D2,L3,V3,M3}  { ! left_convergent_lines( X, Y ), 
% 0.72/1.09    unequally_directed_lines( Y, Z ), left_convergent_lines( X, Z ) }.
% 0.72/1.09  (484) {G0,W6,D2,L2,V0,M2}  { alpha8( skol1, skol2 ), 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  (485) {G0,W6,D2,L2,V0,M2}  { alpha8( skol1, skol2 ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  (486) {G0,W6,D2,L2,V2,M2}  { ! alpha8( X, Y ), 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  (487) {G0,W6,D2,L2,V2,M2}  { ! alpha8( X, Y ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ) }.
% 0.72/1.09  (488) {G0,W9,D2,L3,V2,M3}  { ! unequally_directed_opposite_lines( X, Y ), 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ), alpha8( X, Y ) }.
% 0.72/1.09  
% 0.72/1.09  
% 0.72/1.09  Total Proof:
% 0.72/1.09  
% 0.72/1.09  subsumption: (0) {G0,W7,D3,L2,V2,M1} I { ! 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ), unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ) }.
% 0.72/1.09  parent0: (407) {G0,W7,D3,L2,V2,M2}  { ! unequally_directed_opposite_lines( 
% 0.72/1.09    X, Y ), unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 0
% 0.72/1.09     1 ==> 1
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (1) {G0,W7,D3,L2,V2,M1} I { unequally_directed_opposite_lines
% 0.72/1.09    ( X, Y ), ! unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  parent0: (408) {G0,W7,D3,L2,V2,M2}  { ! unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ), unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (6) {G0,W6,D2,L2,V2,M1} I { ! unequally_directed_lines( X, Y )
% 0.72/1.09    , ! equally_directed_lines( X, Y ) }.
% 0.72/1.09  parent0: (413) {G0,W6,D2,L2,V2,M2}  { ! equally_directed_lines( X, Y ), ! 
% 0.72/1.09    unequally_directed_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (47) {G0,W3,D2,L1,V1,M1} I { equally_directed_lines( X, X )
% 0.72/1.09     }.
% 0.72/1.09  parent0: (454) {G0,W3,D2,L1,V1,M1}  { equally_directed_lines( X, X ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (48) {G0,W9,D2,L3,V3,M3} I { unequally_directed_lines( X, Z )
% 0.72/1.09    , unequally_directed_lines( Y, Z ), ! unequally_directed_lines( X, Y )
% 0.72/1.09     }.
% 0.72/1.09  parent0: (455) {G0,W9,D2,L3,V3,M3}  { ! unequally_directed_lines( X, Y ), 
% 0.72/1.09    unequally_directed_lines( X, Z ), unequally_directed_lines( Y, Z ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09     Z := Z
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 2
% 0.72/1.09     1 ==> 0
% 0.72/1.09     2 ==> 1
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (54) {G0,W7,D3,L2,V2,M2} I { unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ), unequally_directed_lines( X, Y ) }.
% 0.72/1.09  parent0: (461) {G0,W7,D3,L2,V2,M2}  { unequally_directed_lines( X, Y ), 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (55) {G0,W14,D3,L4,V2,M2} I { ! unequally_directed_lines( X, Y
% 0.72/1.09     ), ! unequally_directed_lines( X, reverse_line( Y ) ), 
% 0.72/1.09    left_convergent_lines( X, reverse_line( Y ) ), left_convergent_lines( X, 
% 0.72/1.09    Y ) }.
% 0.72/1.09  parent0: (462) {G0,W14,D3,L4,V2,M4}  { ! unequally_directed_lines( X, Y ), 
% 0.72/1.09    ! unequally_directed_lines( X, reverse_line( Y ) ), left_convergent_lines
% 0.72/1.09    ( X, Y ), left_convergent_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 0
% 0.72/1.09     1 ==> 1
% 0.72/1.09     2 ==> 3
% 0.72/1.09     3 ==> 2
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (57) {G0,W3,D2,L1,V2,M1} I { ! left_convergent_lines( X, Y )
% 0.72/1.09     }.
% 0.72/1.09  parent0: (465) {G0,W3,D2,L1,V2,M1}  { ! left_convergent_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (71) {G0,W6,D2,L2,V0,M1} I { unequally_directed_opposite_lines
% 0.72/1.09    ( skol2, skol1 ), alpha8( skol1, skol2 ) }.
% 0.72/1.09  parent0: (484) {G0,W6,D2,L2,V0,M2}  { alpha8( skol1, skol2 ), 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (72) {G0,W6,D2,L2,V0,M1} I { ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol1, skol2 ), alpha8( skol1, skol2 )
% 0.72/1.09     }.
% 0.72/1.09  parent0: (485) {G0,W6,D2,L2,V0,M2}  { alpha8( skol1, skol2 ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (73) {G0,W6,D2,L2,V2,M1} I { unequally_directed_opposite_lines
% 0.72/1.09    ( X, Y ), ! alpha8( X, Y ) }.
% 0.72/1.09  parent0: (486) {G0,W6,D2,L2,V2,M2}  { ! alpha8( X, Y ), 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (74) {G0,W6,D2,L2,V2,M1} I { ! 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ), ! alpha8( X, Y ) }.
% 0.72/1.09  parent0: (487) {G0,W6,D2,L2,V2,M2}  { ! alpha8( X, Y ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (645) {G1,W3,D2,L1,V1,M1}  { ! unequally_directed_lines( X, X )
% 0.72/1.09     }.
% 0.72/1.09  parent0[1]: (6) {G0,W6,D2,L2,V2,M1} I { ! unequally_directed_lines( X, Y )
% 0.72/1.09    , ! equally_directed_lines( X, Y ) }.
% 0.72/1.09  parent1[0]: (47) {G0,W3,D2,L1,V1,M1} I { equally_directed_lines( X, X ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := X
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09     X := X
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (87) {G1,W3,D2,L1,V1,M1} R(6,47) { ! unequally_directed_lines
% 0.72/1.09    ( X, X ) }.
% 0.72/1.09  parent0: (645) {G1,W3,D2,L1,V1,M1}  { ! unequally_directed_lines( X, X )
% 0.72/1.09     }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (646) {G1,W6,D2,L2,V0,M2}  { ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  parent0[1]: (74) {G0,W6,D2,L2,V2,M1} I { ! 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ), ! alpha8( X, Y ) }.
% 0.72/1.09  parent1[1]: (72) {G0,W6,D2,L2,V0,M1} I { ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol1, skol2 ), alpha8( skol1, skol2 )
% 0.72/1.09     }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := skol1
% 0.72/1.09     Y := skol2
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (90) {G1,W6,D2,L2,V0,M1} R(72,74) { ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  parent0: (646) {G1,W6,D2,L2,V0,M2}  { ! unequally_directed_opposite_lines( 
% 0.72/1.09    skol2, skol1 ), ! unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 0
% 0.72/1.09     1 ==> 1
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (647) {G1,W6,D2,L2,V0,M2}  { unequally_directed_opposite_lines
% 0.72/1.09    ( skol1, skol2 ), unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  parent0[1]: (73) {G0,W6,D2,L2,V2,M1} I { unequally_directed_opposite_lines
% 0.72/1.09    ( X, Y ), ! alpha8( X, Y ) }.
% 0.72/1.09  parent1[1]: (71) {G0,W6,D2,L2,V0,M1} I { unequally_directed_opposite_lines
% 0.72/1.09    ( skol2, skol1 ), alpha8( skol1, skol2 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := skol1
% 0.72/1.09     Y := skol2
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (92) {G1,W6,D2,L2,V0,M1} R(71,73) { 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ), 
% 0.72/1.09    unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  parent0: (647) {G1,W6,D2,L2,V0,M2}  { unequally_directed_opposite_lines( 
% 0.72/1.09    skol1, skol2 ), unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (648) {G1,W6,D2,L2,V2,M2}  { unequally_directed_opposite_lines
% 0.72/1.09    ( X, Y ), unequally_directed_lines( X, Y ) }.
% 0.72/1.09  parent0[1]: (1) {G0,W7,D3,L2,V2,M1} I { unequally_directed_opposite_lines( 
% 0.72/1.09    X, Y ), ! unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  parent1[0]: (54) {G0,W7,D3,L2,V2,M2} I { unequally_directed_lines( X, 
% 0.72/1.09    reverse_line( Y ) ), unequally_directed_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (102) {G1,W6,D2,L2,V2,M1} R(54,1) { 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ), unequally_directed_lines( X, Y
% 0.72/1.09     ) }.
% 0.72/1.09  parent0: (648) {G1,W6,D2,L2,V2,M2}  { unequally_directed_opposite_lines( X
% 0.72/1.09    , Y ), unequally_directed_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 0
% 0.72/1.09     1 ==> 1
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (650) {G1,W6,D2,L2,V2,M2}  { unequally_directed_lines( Y, X ), 
% 0.72/1.09    ! unequally_directed_lines( X, Y ) }.
% 0.72/1.09  parent0[0]: (87) {G1,W3,D2,L1,V1,M1} R(6,47) { ! unequally_directed_lines( 
% 0.72/1.09    X, X ) }.
% 0.72/1.09  parent1[0]: (48) {G0,W9,D2,L3,V3,M3} I { unequally_directed_lines( X, Z ), 
% 0.72/1.09    unequally_directed_lines( Y, Z ), ! unequally_directed_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09     Z := X
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (139) {G2,W6,D2,L2,V2,M2} R(48,87) { ! 
% 0.72/1.09    unequally_directed_lines( Y, X ), unequally_directed_lines( X, Y ) }.
% 0.72/1.09  parent0: (650) {G1,W6,D2,L2,V2,M2}  { unequally_directed_lines( Y, X ), ! 
% 0.72/1.09    unequally_directed_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := Y
% 0.72/1.09     Y := X
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (652) {G2,W6,D2,L2,V2,M2}  { unequally_directed_lines( Y, X ), 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  parent0[0]: (139) {G2,W6,D2,L2,V2,M2} R(48,87) { ! unequally_directed_lines
% 0.72/1.09    ( Y, X ), unequally_directed_lines( X, Y ) }.
% 0.72/1.09  parent1[1]: (102) {G1,W6,D2,L2,V2,M1} R(54,1) { 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ), unequally_directed_lines( X, Y
% 0.72/1.09     ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := Y
% 0.72/1.09     Y := X
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (148) {G3,W6,D2,L2,V2,M1} R(139,102) { 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ), unequally_directed_lines( X, Y
% 0.72/1.09     ) }.
% 0.72/1.09  parent0: (652) {G2,W6,D2,L2,V2,M2}  { unequally_directed_lines( Y, X ), 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := Y
% 0.72/1.09     Y := X
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (653) {G1,W10,D3,L3,V2,M3}  { ! unequally_directed_lines( X, Y
% 0.72/1.09     ), ! unequally_directed_lines( X, reverse_line( Y ) ), 
% 0.72/1.09    left_convergent_lines( X, Y ) }.
% 0.72/1.09  parent0[0]: (57) {G0,W3,D2,L1,V2,M1} I { ! left_convergent_lines( X, Y )
% 0.72/1.09     }.
% 0.72/1.09  parent1[2]: (55) {G0,W14,D3,L4,V2,M2} I { ! unequally_directed_lines( X, Y
% 0.72/1.09     ), ! unequally_directed_lines( X, reverse_line( Y ) ), 
% 0.72/1.09    left_convergent_lines( X, reverse_line( Y ) ), left_convergent_lines( X, 
% 0.72/1.09    Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := reverse_line( Y )
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (655) {G1,W7,D3,L2,V2,M2}  { ! unequally_directed_lines( X, Y )
% 0.72/1.09    , ! unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  parent0[0]: (57) {G0,W3,D2,L1,V2,M1} I { ! left_convergent_lines( X, Y )
% 0.72/1.09     }.
% 0.72/1.09  parent1[2]: (653) {G1,W10,D3,L3,V2,M3}  { ! unequally_directed_lines( X, Y
% 0.72/1.09     ), ! unequally_directed_lines( X, reverse_line( Y ) ), 
% 0.72/1.09    left_convergent_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (315) {G1,W7,D3,L2,V2,M2} S(55);r(57);r(57) { ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), ! 
% 0.72/1.09    unequally_directed_lines( X, Y ) }.
% 0.72/1.09  parent0: (655) {G1,W7,D3,L2,V2,M2}  { ! unequally_directed_lines( X, Y ), !
% 0.72/1.09     unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (656) {G1,W6,D2,L2,V2,M2}  { ! unequally_directed_lines( X, Y )
% 0.72/1.09    , ! unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  parent0[0]: (315) {G1,W7,D3,L2,V2,M2} S(55);r(57);r(57) { ! 
% 0.72/1.09    unequally_directed_lines( X, reverse_line( Y ) ), ! 
% 0.72/1.09    unequally_directed_lines( X, Y ) }.
% 0.72/1.09  parent1[1]: (0) {G0,W7,D3,L2,V2,M1} I { ! unequally_directed_opposite_lines
% 0.72/1.09    ( X, Y ), unequally_directed_lines( X, reverse_line( Y ) ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (359) {G2,W6,D2,L2,V2,M1} R(315,0) { ! 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ), ! unequally_directed_lines( X
% 0.72/1.09    , Y ) }.
% 0.72/1.09  parent0: (656) {G1,W6,D2,L2,V2,M2}  { ! unequally_directed_lines( X, Y ), !
% 0.72/1.09     unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (659) {G3,W6,D2,L2,V2,M2}  { ! 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ), 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ) }.
% 0.72/1.09  parent0[1]: (359) {G2,W6,D2,L2,V2,M1} R(315,0) { ! 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ), ! unequally_directed_lines( X
% 0.72/1.09    , Y ) }.
% 0.72/1.09  parent1[1]: (148) {G3,W6,D2,L2,V2,M1} R(139,102) { 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ), unequally_directed_lines( X, Y
% 0.72/1.09     ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (391) {G4,W6,D2,L2,V2,M2} R(359,148) { 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  parent0: (659) {G3,W6,D2,L2,V2,M2}  { ! unequally_directed_opposite_lines( 
% 0.72/1.09    X, Y ), unequally_directed_opposite_lines( Y, X ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := X
% 0.72/1.09     Y := Y
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 1
% 0.72/1.09     1 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (661) {G2,W6,D2,L2,V0,M2}  { unequally_directed_opposite_lines
% 0.72/1.09    ( skol2, skol1 ), unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  parent0[1]: (391) {G4,W6,D2,L2,V2,M2} R(359,148) { 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  parent1[1]: (92) {G1,W6,D2,L2,V0,M1} R(71,73) { 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ), 
% 0.72/1.09    unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09     X := skol1
% 0.72/1.09     Y := skol2
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  factor: (662) {G2,W3,D2,L1,V0,M1}  { unequally_directed_opposite_lines( 
% 0.72/1.09    skol2, skol1 ) }.
% 0.72/1.09  parent0[0, 1]: (661) {G2,W6,D2,L2,V0,M2}  { 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ), 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (404) {G5,W3,D2,L1,V0,M1} R(391,92);f { 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  parent0: (662) {G2,W3,D2,L1,V0,M1}  { unequally_directed_opposite_lines( 
% 0.72/1.09    skol2, skol1 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09     0 ==> 0
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (665) {G2,W6,D2,L2,V0,M2}  { ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  parent0[1]: (90) {G1,W6,D2,L2,V0,M1} R(72,74) { ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol1, skol2 ) }.
% 0.72/1.09  parent1[0]: (391) {G4,W6,D2,L2,V2,M2} R(359,148) { 
% 0.72/1.09    unequally_directed_opposite_lines( Y, X ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( X, Y ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09     X := skol2
% 0.72/1.09     Y := skol1
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  factor: (666) {G2,W3,D2,L1,V0,M1}  { ! unequally_directed_opposite_lines( 
% 0.72/1.09    skol2, skol1 ) }.
% 0.72/1.09  parent0[0, 1]: (665) {G2,W6,D2,L2,V0,M2}  { ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ), ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  resolution: (669) {G3,W0,D0,L0,V0,M0}  {  }.
% 0.72/1.09  parent0[0]: (666) {G2,W3,D2,L1,V0,M1}  { ! 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  parent1[0]: (404) {G5,W3,D2,L1,V0,M1} R(391,92);f { 
% 0.72/1.09    unequally_directed_opposite_lines( skol2, skol1 ) }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  substitution1:
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  subsumption: (405) {G6,W0,D0,L0,V0,M0} R(391,90);f;r(404) {  }.
% 0.72/1.09  parent0: (669) {G3,W0,D0,L0,V0,M0}  {  }.
% 0.72/1.09  substitution0:
% 0.72/1.09  end
% 0.72/1.09  permutation0:
% 0.72/1.09  end
% 0.72/1.09  
% 0.72/1.09  Proof check complete!
% 0.72/1.09  
% 0.72/1.09  Memory use:
% 0.72/1.09  
% 0.72/1.09  space for terms:        5453
% 0.72/1.09  space for clauses:      21061
% 0.72/1.09  
% 0.72/1.09  
% 0.72/1.09  clauses generated:      1001
% 0.72/1.09  clauses kept:           406
% 0.72/1.09  clauses selected:       134
% 0.72/1.09  clauses deleted:        20
% 0.72/1.09  clauses inuse deleted:  0
% 0.72/1.09  
% 0.72/1.09  subsentry:          4629
% 0.72/1.09  literals s-matched: 2642
% 0.72/1.09  literals matched:   2442
% 0.72/1.09  full subsumption:   690
% 0.72/1.09  
% 0.72/1.09  checksum:           -1389571640
% 0.72/1.09  
% 0.72/1.09  
% 0.72/1.09  Bliksem ended
%------------------------------------------------------------------------------