TSTP Solution File: NUM830^5 by Satallax---3.5

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Satallax---3.5
% Problem  : NUM830^5 : TPTP v8.1.0. Bugfixed v5.3.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : satallax -E eprover-ho -P picomus -M modes -p tstp -t %d %s

% Computer : n021.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  : 600s
% DateTime : Mon Jul 18 13:56:55 EDT 2022

% Result   : Theorem 2.42s 2.60s
% Output   : Proof 2.42s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   14
%            Number of leaves      :   32
% Syntax   : Number of formulae    :  110 (  38 unt;   0 typ;   4 def)
%            Number of atoms       :  431 (  42 equ;   0 cnn)
%            Maximal formula atoms :   10 (   3 avg)
%            Number of connectives :  439 ( 116   ~;  89   |;   4   &; 212   @)
%                                         (   0 <=>;  16  =>;   2  <=;   0 <~>)
%            Maximal formula depth :   13 (   3 avg)
%            Number of types       :    0 (   0 usr)
%            Number of type conns  :    0 (   0   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :   39 (  37 usr;  38 con; 0-2 aty)
%            Number of variables   :   44 (   0   ^  44   !;   0   ?;  44   :)

% Comments : 
%------------------------------------------------------------------------------
thf(def_cPA_1,definition,
    ( cPA_1
    = ( ! [X1: n] :
          ( ( c_plus @ X1 @ c0 )
          = X1 ) ) ) ).

thf(def_cPA_2,definition,
    ( cPA_2
    = ( ! [X1: n,X2: n] :
          ( ( c_plus @ X1 @ ( cS @ X2 ) )
          = ( cS @ ( c_plus @ X1 @ X2 ) ) ) ) ) ).

thf(def_cPA_3,definition,
    ( cPA_3
    = ( ! [X1: n] :
          ( ( c_star @ X1 @ c0 )
          = c0 ) ) ) ).

thf(def_cPA_4,definition,
    ( cPA_4
    = ( ! [X1: n,X2: n] :
          ( ( c_star @ X1 @ ( cS @ X2 ) )
          = ( c_plus @ ( c_star @ X1 @ X2 ) @ X1 ) ) ) ) ).

thf(cPA_THM1,conjecture,
    ( ~ ( ~ ( ~ ( ! [X1: n] :
                    ( ( c_plus @ X1 @ c0 )
                    = X1 )
               => ~ ! [X1: n,X2: n] :
                      ( ( c_plus @ X1 @ ( cS @ X2 ) )
                      = ( cS @ ( c_plus @ X1 @ X2 ) ) ) )
           => ~ ! [X1: n] :
                  ( ( c_star @ X1 @ c0 )
                  = c0 ) )
       => ~ ! [X1: n,X2: n] :
              ( ( c_star @ X1 @ ( cS @ X2 ) )
              = ( c_plus @ ( c_star @ X1 @ X2 ) @ X1 ) ) )
   => ( ( c_star @ ( cS @ ( cS @ c0 ) ) @ ( cS @ ( cS @ c0 ) ) )
      = ( c_plus @ ( cS @ ( cS @ c0 ) ) @ ( cS @ ( cS @ c0 ) ) ) ) ) ).

thf(h0,negated_conjecture,
    ~ ( ~ ( ~ ( ~ ( ! [X1: n] :
                      ( ( c_plus @ X1 @ c0 )
                      = X1 )
                 => ~ ! [X1: n,X2: n] :
                        ( ( c_plus @ X1 @ ( cS @ X2 ) )
                        = ( cS @ ( c_plus @ X1 @ X2 ) ) ) )
             => ~ ! [X1: n] :
                    ( ( c_star @ X1 @ c0 )
                    = c0 ) )
         => ~ ! [X1: n,X2: n] :
                ( ( c_star @ X1 @ ( cS @ X2 ) )
                = ( c_plus @ ( c_star @ X1 @ X2 ) @ X1 ) ) )
     => ( ( c_star @ ( cS @ ( cS @ c0 ) ) @ ( cS @ ( cS @ c0 ) ) )
        = ( c_plus @ ( cS @ ( cS @ c0 ) ) @ ( cS @ ( cS @ c0 ) ) ) ) ),
    inference(assume_negation,[status(cth)],[cPA_THM1]) ).

thf(ax1405,axiom,
    ( p1
    | ~ p2 ),
    file('<stdin>',ax1405) ).

thf(ax1406,axiom,
    ~ p1,
    file('<stdin>',ax1406) ).

thf(ax1393,axiom,
    ( ~ p18
    | p17 ),
    file('<stdin>',ax1393) ).

thf(ax1387,axiom,
    ( ~ p11
    | p19 ),
    file('<stdin>',ax1387) ).

thf(ax1395,axiom,
    ( p2
    | p11 ),
    file('<stdin>',ax1395) ).

thf(ax1392,axiom,
    ( ~ p17
    | p16 ),
    file('<stdin>',ax1392) ).

thf(ax1394,axiom,
    p18,
    file('<stdin>',ax1394) ).

thf(ax1404,axiom,
    ( p1
    | ~ p3 ),
    file('<stdin>',ax1404) ).

thf(ax1388,axiom,
    ( ~ p19
    | p13 ),
    file('<stdin>',ax1388) ).

thf(ax1391,axiom,
    ( ~ p16
    | p3
    | p15 ),
    file('<stdin>',ax1391) ).

thf(ax1371,axiom,
    ( ~ p18
    | p39 ),
    file('<stdin>',ax1371) ).

thf(ax1389,axiom,
    ( ~ p14
    | ~ p13
    | ~ p12 ),
    file('<stdin>',ax1389) ).

thf(ax1390,axiom,
    ( ~ p15
    | p14 ),
    file('<stdin>',ax1390) ).

thf(ax1233,axiom,
    ( ~ p39
    | p144 ),
    file('<stdin>',ax1233) ).

thf(ax1366,axiom,
    ( ~ p19
    | p35 ),
    file('<stdin>',ax1366) ).

thf(ax1232,axiom,
    ( ~ p144
    | p12
    | p143 ),
    file('<stdin>',ax1232) ).

thf(ax1230,axiom,
    ( ~ p142
    | ~ p35
    | ~ p141 ),
    file('<stdin>',ax1230) ).

thf(ax1231,axiom,
    ( ~ p143
    | p142 ),
    file('<stdin>',ax1231) ).

thf(ax1211,axiom,
    ( ~ p5
    | p161 ),
    file('<stdin>',ax1211) ).

thf(ax1201,axiom,
    ( ~ p161
    | p169 ),
    file('<stdin>',ax1201) ).

thf(ax1403,axiom,
    p5,
    file('<stdin>',ax1403) ).

thf(ax1189,axiom,
    ( p141
    | ~ p155
    | ~ p153 ),
    file('<stdin>',ax1189) ).

thf(nax1,axiom,
    ( p1
   <= ( ~ ( ~ ( ~ ( ! [X1: n] :
                      ( ( fc_plus @ X1 @ fc0 )
                      = X1 )
                 => ~ ! [X1: n,X2: n] :
                        ( ( fc_plus @ X1 @ ( fcS @ X2 ) )
                        = ( fcS @ ( fc_plus @ X1 @ X2 ) ) ) )
             => ~ ! [X1: n] :
                    ( ( fc_star @ X1 @ fc0 )
                    = fc0 ) )
         => ~ ! [X1: n,X2: n] :
                ( ( fc_star @ X1 @ ( fcS @ X2 ) )
                = ( fc_plus @ ( fc_star @ X1 @ X2 ) @ X1 ) ) )
     => ( ( fc_star @ ( fcS @ ( fcS @ fc0 ) ) @ ( fcS @ ( fcS @ fc0 ) ) )
        = ( fc_plus @ ( fcS @ ( fcS @ fc0 ) ) @ ( fcS @ ( fcS @ fc0 ) ) ) ) ) ),
    file('<stdin>',nax1) ).

thf(ax1200,axiom,
    ( ~ p169
    | ~ p167
    | p155 ),
    file('<stdin>',ax1200) ).

thf(ax1219,axiom,
    p153,
    file('<stdin>',ax1219) ).

thf(nax167,axiom,
    ( p167
   <= ( ( fcS @ ( fcS @ fc0 ) )
      = ( fc_plus @ ( fc_star @ ( fcS @ ( fcS @ fc0 ) ) @ fc0 ) @ ( fcS @ ( fcS @ fc0 ) ) ) ) ),
    file('<stdin>',nax167) ).

thf(c_0_26,plain,
    ( p1
    | ~ p2 ),
    inference(fof_simplification,[status(thm)],[ax1405]) ).

thf(c_0_27,plain,
    ~ p1,
    inference(fof_simplification,[status(thm)],[ax1406]) ).

thf(c_0_28,plain,
    ( p1
    | ~ p2 ),
    inference(split_conjunct,[status(thm)],[c_0_26]) ).

thf(c_0_29,plain,
    ~ p1,
    inference(split_conjunct,[status(thm)],[c_0_27]) ).

thf(c_0_30,plain,
    ( ~ p18
    | p17 ),
    inference(fof_simplification,[status(thm)],[ax1393]) ).

thf(c_0_31,plain,
    ( ~ p11
    | p19 ),
    inference(fof_simplification,[status(thm)],[ax1387]) ).

thf(c_0_32,plain,
    ( p2
    | p11 ),
    inference(split_conjunct,[status(thm)],[ax1395]) ).

thf(c_0_33,plain,
    ~ p2,
    inference(sr,[status(thm)],[c_0_28,c_0_29]) ).

thf(c_0_34,plain,
    ( ~ p17
    | p16 ),
    inference(fof_simplification,[status(thm)],[ax1392]) ).

thf(c_0_35,plain,
    ( p17
    | ~ p18 ),
    inference(split_conjunct,[status(thm)],[c_0_30]) ).

thf(c_0_36,plain,
    p18,
    inference(split_conjunct,[status(thm)],[ax1394]) ).

thf(c_0_37,plain,
    ( p1
    | ~ p3 ),
    inference(fof_simplification,[status(thm)],[ax1404]) ).

thf(c_0_38,plain,
    ( ~ p19
    | p13 ),
    inference(fof_simplification,[status(thm)],[ax1388]) ).

thf(c_0_39,plain,
    ( p19
    | ~ p11 ),
    inference(split_conjunct,[status(thm)],[c_0_31]) ).

thf(c_0_40,plain,
    p11,
    inference(sr,[status(thm)],[c_0_32,c_0_33]) ).

thf(c_0_41,plain,
    ( ~ p16
    | p3
    | p15 ),
    inference(fof_simplification,[status(thm)],[ax1391]) ).

thf(c_0_42,plain,
    ( p16
    | ~ p17 ),
    inference(split_conjunct,[status(thm)],[c_0_34]) ).

thf(c_0_43,plain,
    p17,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_35,c_0_36])]) ).

thf(c_0_44,plain,
    ( p1
    | ~ p3 ),
    inference(split_conjunct,[status(thm)],[c_0_37]) ).

thf(c_0_45,plain,
    ( ~ p18
    | p39 ),
    inference(fof_simplification,[status(thm)],[ax1371]) ).

thf(c_0_46,plain,
    ( ~ p14
    | ~ p13
    | ~ p12 ),
    inference(fof_simplification,[status(thm)],[ax1389]) ).

thf(c_0_47,plain,
    ( p13
    | ~ p19 ),
    inference(split_conjunct,[status(thm)],[c_0_38]) ).

thf(c_0_48,plain,
    p19,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_39,c_0_40])]) ).

thf(c_0_49,plain,
    ( ~ p15
    | p14 ),
    inference(fof_simplification,[status(thm)],[ax1390]) ).

thf(c_0_50,plain,
    ( p3
    | p15
    | ~ p16 ),
    inference(split_conjunct,[status(thm)],[c_0_41]) ).

thf(c_0_51,plain,
    p16,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_42,c_0_43])]) ).

thf(c_0_52,plain,
    ~ p3,
    inference(sr,[status(thm)],[c_0_44,c_0_29]) ).

thf(c_0_53,plain,
    ( ~ p39
    | p144 ),
    inference(fof_simplification,[status(thm)],[ax1233]) ).

thf(c_0_54,plain,
    ( p39
    | ~ p18 ),
    inference(split_conjunct,[status(thm)],[c_0_45]) ).

thf(c_0_55,plain,
    ( ~ p14
    | ~ p13
    | ~ p12 ),
    inference(split_conjunct,[status(thm)],[c_0_46]) ).

thf(c_0_56,plain,
    p13,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_47,c_0_48])]) ).

thf(c_0_57,plain,
    ( p14
    | ~ p15 ),
    inference(split_conjunct,[status(thm)],[c_0_49]) ).

thf(c_0_58,plain,
    p15,
    inference(sr,[status(thm)],[inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_50,c_0_51])]),c_0_52]) ).

thf(c_0_59,plain,
    ( ~ p19
    | p35 ),
    inference(fof_simplification,[status(thm)],[ax1366]) ).

thf(c_0_60,plain,
    ( ~ p144
    | p12
    | p143 ),
    inference(fof_simplification,[status(thm)],[ax1232]) ).

thf(c_0_61,plain,
    ( p144
    | ~ p39 ),
    inference(split_conjunct,[status(thm)],[c_0_53]) ).

thf(c_0_62,plain,
    p39,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_54,c_0_36])]) ).

thf(c_0_63,plain,
    ( ~ p12
    | ~ p14 ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_55,c_0_56])]) ).

thf(c_0_64,plain,
    p14,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_57,c_0_58])]) ).

thf(c_0_65,plain,
    ( ~ p142
    | ~ p35
    | ~ p141 ),
    inference(fof_simplification,[status(thm)],[ax1230]) ).

thf(c_0_66,plain,
    ( p35
    | ~ p19 ),
    inference(split_conjunct,[status(thm)],[c_0_59]) ).

thf(c_0_67,plain,
    ( ~ p143
    | p142 ),
    inference(fof_simplification,[status(thm)],[ax1231]) ).

thf(c_0_68,plain,
    ( p12
    | p143
    | ~ p144 ),
    inference(split_conjunct,[status(thm)],[c_0_60]) ).

thf(c_0_69,plain,
    p144,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_61,c_0_62])]) ).

thf(c_0_70,plain,
    ~ p12,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_63,c_0_64])]) ).

thf(c_0_71,plain,
    ( ~ p5
    | p161 ),
    inference(fof_simplification,[status(thm)],[ax1211]) ).

thf(c_0_72,plain,
    ( ~ p142
    | ~ p35
    | ~ p141 ),
    inference(split_conjunct,[status(thm)],[c_0_65]) ).

thf(c_0_73,plain,
    p35,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_66,c_0_48])]) ).

thf(c_0_74,plain,
    ( p142
    | ~ p143 ),
    inference(split_conjunct,[status(thm)],[c_0_67]) ).

thf(c_0_75,plain,
    p143,
    inference(sr,[status(thm)],[inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_68,c_0_69])]),c_0_70]) ).

thf(c_0_76,plain,
    ( ~ p161
    | p169 ),
    inference(fof_simplification,[status(thm)],[ax1201]) ).

thf(c_0_77,plain,
    ( p161
    | ~ p5 ),
    inference(split_conjunct,[status(thm)],[c_0_71]) ).

thf(c_0_78,plain,
    p5,
    inference(split_conjunct,[status(thm)],[ax1403]) ).

thf(c_0_79,plain,
    ( p141
    | ~ p155
    | ~ p153 ),
    inference(fof_simplification,[status(thm)],[ax1189]) ).

thf(c_0_80,plain,
    ( ~ p141
    | ~ p142 ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_72,c_0_73])]) ).

thf(c_0_81,plain,
    p142,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_74,c_0_75])]) ).

thf(c_0_82,plain,
    ! [X2034: n,X2035: n,X2036: n,X2037: n,X2038: n,X2039: n] :
      ( ( ( ( fc_plus @ X2034 @ fc0 )
          = X2034 )
        | p1 )
      & ( ( ( fc_plus @ X2035 @ ( fcS @ X2036 ) )
          = ( fcS @ ( fc_plus @ X2035 @ X2036 ) ) )
        | p1 )
      & ( ( ( fc_star @ X2037 @ fc0 )
          = fc0 )
        | p1 )
      & ( ( ( fc_star @ X2038 @ ( fcS @ X2039 ) )
          = ( fc_plus @ ( fc_star @ X2038 @ X2039 ) @ X2038 ) )
        | p1 )
      & ( ( ( fc_star @ ( fcS @ ( fcS @ fc0 ) ) @ ( fcS @ ( fcS @ fc0 ) ) )
         != ( fc_plus @ ( fcS @ ( fcS @ fc0 ) ) @ ( fcS @ ( fcS @ fc0 ) ) ) )
        | p1 ) ),
    inference(distribute,[status(thm)],[inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[inference(fof_simplification,[status(thm)],[nax1])])])])]) ).

thf(c_0_83,plain,
    ( ~ p169
    | ~ p167
    | p155 ),
    inference(fof_simplification,[status(thm)],[ax1200]) ).

thf(c_0_84,plain,
    ( p169
    | ~ p161 ),
    inference(split_conjunct,[status(thm)],[c_0_76]) ).

thf(c_0_85,plain,
    p161,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_77,c_0_78])]) ).

thf(c_0_86,plain,
    ( p141
    | ~ p155
    | ~ p153 ),
    inference(split_conjunct,[status(thm)],[c_0_79]) ).

thf(c_0_87,plain,
    p153,
    inference(split_conjunct,[status(thm)],[ax1219]) ).

thf(c_0_88,plain,
    ~ p141,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_80,c_0_81])]) ).

thf(c_0_89,plain,
    ( ( ( fcS @ ( fcS @ fc0 ) )
     != ( fc_plus @ ( fc_star @ ( fcS @ ( fcS @ fc0 ) ) @ fc0 ) @ ( fcS @ ( fcS @ fc0 ) ) ) )
    | p167 ),
    inference(fof_nnf,[status(thm)],[inference(fof_simplification,[status(thm)],[nax167])]) ).

thf(c_0_90,plain,
    ! [X1: n] :
      ( ( ( fc_star @ X1 @ fc0 )
        = fc0 )
      | p1 ),
    inference(split_conjunct,[status(thm)],[c_0_82]) ).

thf(c_0_91,plain,
    ! [X1: n,X2: n] :
      ( ( ( fc_plus @ X1 @ ( fcS @ X2 ) )
        = ( fcS @ ( fc_plus @ X1 @ X2 ) ) )
      | p1 ),
    inference(split_conjunct,[status(thm)],[c_0_82]) ).

thf(c_0_92,plain,
    ! [X1: n] :
      ( ( ( fc_plus @ X1 @ fc0 )
        = X1 )
      | p1 ),
    inference(split_conjunct,[status(thm)],[c_0_82]) ).

thf(c_0_93,plain,
    ( p155
    | ~ p169
    | ~ p167 ),
    inference(split_conjunct,[status(thm)],[c_0_83]) ).

thf(c_0_94,plain,
    p169,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_84,c_0_85])]) ).

thf(c_0_95,plain,
    ~ p155,
    inference(sr,[status(thm)],[inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_86,c_0_87])]),c_0_88]) ).

thf(c_0_96,plain,
    ( p167
    | ( ( fcS @ ( fcS @ fc0 ) )
     != ( fc_plus @ ( fc_star @ ( fcS @ ( fcS @ fc0 ) ) @ fc0 ) @ ( fcS @ ( fcS @ fc0 ) ) ) ) ),
    inference(split_conjunct,[status(thm)],[c_0_89]) ).

thf(c_0_97,plain,
    ! [X1: n] :
      ( ( fc_star @ X1 @ fc0 )
      = fc0 ),
    inference(sr,[status(thm)],[c_0_90,c_0_29]) ).

thf(c_0_98,plain,
    ! [X1: n,X2: n] :
      ( ( fc_plus @ X1 @ ( fcS @ X2 ) )
      = ( fcS @ ( fc_plus @ X1 @ X2 ) ) ),
    inference(sr,[status(thm)],[c_0_91,c_0_29]) ).

thf(c_0_99,plain,
    ! [X1: n] :
      ( ( fc_plus @ X1 @ fc0 )
      = X1 ),
    inference(sr,[status(thm)],[c_0_92,c_0_29]) ).

thf(c_0_100,plain,
    ~ p167,
    inference(sr,[status(thm)],[inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_93,c_0_94])]),c_0_95]) ).

thf(c_0_101,plain,
    $false,
    inference(sr,[status(thm)],[inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_96,c_0_97]),c_0_98]),c_0_98]),c_0_99])]),c_0_100]),
    [proof] ).

thf(1,plain,
    $false,
    inference(eprover,[status(thm),assumptions([h0])],]) ).

thf(0,theorem,
    ( ~ ( ~ ( ~ ( ! [X1: n] :
                    ( ( c_plus @ X1 @ c0 )
                    = X1 )
               => ~ ! [X1: n,X2: n] :
                      ( ( c_plus @ X1 @ ( cS @ X2 ) )
                      = ( cS @ ( c_plus @ X1 @ X2 ) ) ) )
           => ~ ! [X1: n] :
                  ( ( c_star @ X1 @ c0 )
                  = c0 ) )
       => ~ ! [X1: n,X2: n] :
              ( ( c_star @ X1 @ ( cS @ X2 ) )
              = ( c_plus @ ( c_star @ X1 @ X2 ) @ X1 ) ) )
   => ( ( c_star @ ( cS @ ( cS @ c0 ) ) @ ( cS @ ( cS @ c0 ) ) )
      = ( c_plus @ ( cS @ ( cS @ c0 ) ) @ ( cS @ ( cS @ c0 ) ) ) ) ),
    inference(contra,[status(thm),contra(discharge,[h0])],[1,h0]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.10/0.12  % Problem  : NUM830^5 : TPTP v8.1.0. Bugfixed v5.3.0.
% 0.10/0.12  % Command  : satallax -E eprover-ho -P picomus -M modes -p tstp -t %d %s
% 0.12/0.33  % Computer : n021.cluster.edu
% 0.12/0.33  % Model    : x86_64 x86_64
% 0.12/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33  % Memory   : 8042.1875MB
% 0.12/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33  % CPULimit : 300
% 0.12/0.33  % WCLimit  : 600
% 0.12/0.33  % DateTime : Thu Jul  7 15:25:34 EDT 2022
% 0.12/0.34  % CPUTime  : 
% 2.42/2.60  % SZS status Theorem
% 2.42/2.60  % Mode: mode506
% 2.42/2.60  % Inferences: 19522
% 2.42/2.60  % SZS output start Proof
% See solution above
%------------------------------------------------------------------------------