TSTP Solution File: SEU815^2 by Lash---1.13

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Lash---1.13
% Problem  : SEU815^2 : TPTP v8.1.2. Released v3.7.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : lash -P picomus -M modes -p tstp -t %d %s

% Computer : n018.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  : 300s
% DateTime : Thu Aug 31 17:34:42 EDT 2023

% Result   : Theorem 148.42s 148.81s
% Output   : Proof 148.42s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   11
%            Number of leaves      :   86
% Syntax   : Number of formulae    :  100 (  25 unt;   7 typ;   7 def)
%            Number of atoms       :  276 (   7 equ;   0 cnn)
%            Maximal formula atoms :    9 (   2 avg)
%            Number of connectives :  529 (  46   ~;  34   |;   0   &; 305   @)
%                                         (  32 <=>; 112  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   14 (   5 avg)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :    6 (   6   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :   47 (  45 usr;  43 con; 0-2 aty)
%            Number of variables   :  107 (  27   ^;  80   !;   0   ?; 107   :)

% Comments : 
%------------------------------------------------------------------------------
thf(ty_setunion,type,
    setunion: $i > $i ).

thf(ty_eigen__1,type,
    eigen__1: $i ).

thf(ty_subset,type,
    subset: $i > $i > $o ).

thf(ty_eigen__8,type,
    eigen__8: $i ).

thf(ty_eigen__10,type,
    eigen__10: $i ).

thf(ty_eigen__0,type,
    eigen__0: $i ).

thf(ty_in,type,
    in: $i > $i > $o ).

thf(h0,assumption,
    ! [X1: $i > $o,X2: $i] :
      ( ( X1 @ X2 )
     => ( X1 @ ( eps__0 @ X1 ) ) ),
    introduced(assumption,[]) ).

thf(eigendef_eigen__10,definition,
    ( eigen__10
    = ( eps__0
      @ ^ [X1: $i] :
          ~ ( ( in @ X1 @ eigen__1 )
           => ( in @ X1 @ ( setunion @ eigen__0 ) ) ) ) ),
    introduced(definition,[new_symbols(definition,[eigen__10])]) ).

thf(eigendef_eigen__8,definition,
    ( eigen__8
    = ( eps__0
      @ ^ [X1: $i] :
          ~ ( ( in @ eigen__1 @ X1 )
           => ~ ( in @ X1 @ eigen__0 ) ) ) ),
    introduced(definition,[new_symbols(definition,[eigen__8])]) ).

thf(sP1,plain,
    ( sP1
  <=> ( in @ eigen__1 @ ( setunion @ eigen__0 ) ) ),
    introduced(definition,[new_symbols(definition,[sP1])]) ).

thf(sP2,plain,
    ( sP2
  <=> ( ( in @ eigen__10 @ eigen__1 )
     => ( in @ eigen__10 @ eigen__8 ) ) ),
    introduced(definition,[new_symbols(definition,[sP2])]) ).

thf(sP3,plain,
    ( sP3
  <=> ! [X1: $i,X2: $i] :
        ( ( in @ X1 @ eigen__8 )
       => ( ( in @ X2 @ X1 )
         => ( in @ X2 @ eigen__8 ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP3])]) ).

thf(sP4,plain,
    ( sP4
  <=> ( ( in @ eigen__8 @ eigen__0 )
     => ! [X1: $i] :
          ( ( in @ X1 @ eigen__8 )
         => ( subset @ X1 @ eigen__8 ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP4])]) ).

thf(sP5,plain,
    ( sP5
  <=> ! [X1: $i,X2: $i,X3: $i] :
        ( ( in @ X2 @ X3 )
       => ( ( in @ X3 @ X1 )
         => ( in @ X2 @ ( setunion @ X1 ) ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP5])]) ).

thf(sP6,plain,
    ( sP6
  <=> ! [X1: $o] :
        ( ! [X2: $i] :
            ( ( in @ eigen__1 @ X2 )
           => ( ( in @ X2 @ eigen__0 )
             => X1 ) )
       => X1 ) ),
    introduced(definition,[new_symbols(definition,[sP6])]) ).

thf(sP7,plain,
    ( sP7
  <=> ! [X1: $i] :
        ( ( in @ X1 @ eigen__8 )
       => ( subset @ X1 @ eigen__8 ) ) ),
    introduced(definition,[new_symbols(definition,[sP7])]) ).

thf(sP8,plain,
    ( sP8
  <=> ! [X1: $i,X2: $i] :
        ( ! [X3: $i] :
            ( ( in @ X3 @ X1 )
           => ( in @ X3 @ X2 ) )
       => ( subset @ X1 @ X2 ) ) ),
    introduced(definition,[new_symbols(definition,[sP8])]) ).

thf(sP9,plain,
    ( sP9
  <=> ( ( in @ eigen__10 @ eigen__1 )
     => ( in @ eigen__10 @ ( setunion @ eigen__0 ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP9])]) ).

thf(sP10,plain,
    ( sP10
  <=> ( in @ eigen__10 @ eigen__8 ) ),
    introduced(definition,[new_symbols(definition,[sP10])]) ).

thf(sP11,plain,
    ( sP11
  <=> ( ! [X1: $i] :
          ( ( in @ X1 @ eigen__1 )
         => ( in @ X1 @ ( setunion @ eigen__0 ) ) )
     => ( subset @ eigen__1 @ ( setunion @ eigen__0 ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP11])]) ).

thf(sP12,plain,
    ( sP12
  <=> ( in @ eigen__10 @ eigen__1 ) ),
    introduced(definition,[new_symbols(definition,[sP12])]) ).

thf(sP13,plain,
    ( sP13
  <=> ! [X1: $i] :
        ( ( in @ eigen__1 @ X1 )
       => ~ ( in @ X1 @ eigen__0 ) ) ),
    introduced(definition,[new_symbols(definition,[sP13])]) ).

thf(sP14,plain,
    ( sP14
  <=> ( sP7
     => sP3 ) ),
    introduced(definition,[new_symbols(definition,[sP14])]) ).

thf(sP15,plain,
    ( sP15
  <=> ( sP10
     => ( ( in @ eigen__8 @ eigen__0 )
       => ( in @ eigen__10 @ ( setunion @ eigen__0 ) ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP15])]) ).

thf(sP16,plain,
    ( sP16
  <=> ! [X1: $i,X2: $i] :
        ( ( in @ X2 @ ( setunion @ X1 ) )
       => ! [X3: $o] :
            ( ! [X4: $i] :
                ( ( in @ X2 @ X4 )
               => ( ( in @ X4 @ X1 )
                 => X3 ) )
           => X3 ) ) ),
    introduced(definition,[new_symbols(definition,[sP16])]) ).

thf(sP17,plain,
    ( sP17
  <=> ! [X1: $i] :
        ( ( in @ eigen__1 @ eigen__8 )
       => ( ( in @ X1 @ eigen__1 )
         => ( in @ X1 @ eigen__8 ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP17])]) ).

thf(sP18,plain,
    ( sP18
  <=> ! [X1: $i] :
        ( ( in @ X1 @ ( setunion @ eigen__0 ) )
       => ! [X2: $o] :
            ( ! [X3: $i] :
                ( ( in @ X1 @ X3 )
               => ( ( in @ X3 @ eigen__0 )
                 => X2 ) )
           => X2 ) ) ),
    introduced(definition,[new_symbols(definition,[sP18])]) ).

thf(sP19,plain,
    ( sP19
  <=> ( ( in @ eigen__1 @ eigen__8 )
     => ~ ( in @ eigen__8 @ eigen__0 ) ) ),
    introduced(definition,[new_symbols(definition,[sP19])]) ).

thf(sP20,plain,
    ( sP20
  <=> ! [X1: $i] :
        ( ! [X2: $i] :
            ( ( in @ X2 @ eigen__1 )
           => ( in @ X2 @ X1 ) )
       => ( subset @ eigen__1 @ X1 ) ) ),
    introduced(definition,[new_symbols(definition,[sP20])]) ).

thf(sP21,plain,
    ( sP21
  <=> ! [X1: $i] :
        ( ( in @ X1 @ eigen__0 )
       => ! [X2: $i] :
            ( ( in @ X2 @ X1 )
           => ( subset @ X2 @ X1 ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP21])]) ).

thf(sP22,plain,
    ( sP22
  <=> ( subset @ eigen__1 @ ( setunion @ eigen__0 ) ) ),
    introduced(definition,[new_symbols(definition,[sP22])]) ).

thf(sP23,plain,
    ( sP23
  <=> ! [X1: $i,X2: $i] :
        ( ( in @ X1 @ X2 )
       => ( ( in @ X2 @ eigen__0 )
         => ( in @ X1 @ ( setunion @ eigen__0 ) ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP23])]) ).

thf(sP24,plain,
    ( sP24
  <=> ( sP1
     => sP6 ) ),
    introduced(definition,[new_symbols(definition,[sP24])]) ).

thf(sP25,plain,
    ( sP25
  <=> ( in @ eigen__10 @ ( setunion @ eigen__0 ) ) ),
    introduced(definition,[new_symbols(definition,[sP25])]) ).

thf(sP26,plain,
    ( sP26
  <=> ! [X1: $i] :
        ( ( in @ eigen__10 @ X1 )
       => ( ( in @ X1 @ eigen__0 )
         => sP25 ) ) ),
    introduced(definition,[new_symbols(definition,[sP26])]) ).

thf(sP27,plain,
    ( sP27
  <=> ! [X1: $i] :
        ( ( in @ X1 @ eigen__1 )
       => ( in @ X1 @ ( setunion @ eigen__0 ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP27])]) ).

thf(sP28,plain,
    ( sP28
  <=> ( ( in @ eigen__1 @ eigen__8 )
     => sP2 ) ),
    introduced(definition,[new_symbols(definition,[sP28])]) ).

thf(sP29,plain,
    ( sP29
  <=> ( in @ eigen__1 @ eigen__8 ) ),
    introduced(definition,[new_symbols(definition,[sP29])]) ).

thf(sP30,plain,
    ( sP30
  <=> ( in @ eigen__8 @ eigen__0 ) ),
    introduced(definition,[new_symbols(definition,[sP30])]) ).

thf(sP31,plain,
    ( sP31
  <=> ! [X1: $i] :
        ( ! [X2: $i] :
            ( ( in @ X2 @ X1 )
           => ( subset @ X2 @ X1 ) )
       => ! [X2: $i,X3: $i] :
            ( ( in @ X2 @ X1 )
           => ( ( in @ X3 @ X2 )
             => ( in @ X3 @ X1 ) ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP31])]) ).

thf(sP32,plain,
    ( sP32
  <=> ( sP30
     => sP25 ) ),
    introduced(definition,[new_symbols(definition,[sP32])]) ).

thf(def_setunionI,definition,
    ( setunionI
    = ( ! [X1: $i,X2: $i,X3: $i] :
          ( ^ [X4: $o,X5: $o] :
              ( X4
             => X5 )
          @ ( in @ X2 @ X3 )
          @ ( ^ [X4: $o,X5: $o] :
                ( X4
               => X5 )
            @ ( in @ X3 @ X1 )
            @ ( in @ X2 @ ( setunion @ X1 ) ) ) ) ) ) ).

thf(def_setunionE,definition,
    ( setunionE
    = ( ! [X1: $i,X2: $i] :
          ( ^ [X3: $o,X4: $o] :
              ( X3
             => X4 )
          @ ( in @ X2 @ ( setunion @ X1 ) )
          @ ! [X3: $o] :
              ( ^ [X4: $o,X5: $o] :
                  ( X4
                 => X5 )
              @ ! [X4: $i] :
                  ( ^ [X5: $o,X6: $o] :
                      ( X5
                     => X6 )
                  @ ( in @ X2 @ X4 )
                  @ ( ^ [X5: $o,X6: $o] :
                        ( X5
                       => X6 )
                    @ ( in @ X4 @ X1 )
                    @ X3 ) )
              @ X3 ) ) ) ) ).

thf(def_subsetI1,definition,
    ( subsetI1
    = ( ! [X1: $i,X2: $i] :
          ( ^ [X3: $o,X4: $o] :
              ( X3
             => X4 )
          @ ! [X3: $i] :
              ( ^ [X4: $o,X5: $o] :
                  ( X4
                 => X5 )
              @ ( in @ X3 @ X1 )
              @ ( in @ X3 @ X2 ) )
          @ ( subset @ X1 @ X2 ) ) ) ) ).

thf(def_transitiveset,definition,
    ( transitiveset
    = ( ^ [X1: $i] :
        ! [X2: $i] :
          ( ^ [X3: $o,X4: $o] :
              ( X3
             => X4 )
          @ ( in @ X2 @ X1 )
          @ ( subset @ X2 @ X1 ) ) ) ) ).

thf(def_transitivesetOp2,definition,
    ( transitivesetOp2
    = ( ! [X1: $i] :
          ( ^ [X2: $o,X3: $o] :
              ( X2
             => X3 )
          @ ( transitiveset @ X1 )
          @ ! [X2: $i,X3: $i] :
              ( ^ [X4: $o,X5: $o] :
                  ( X4
                 => X5 )
              @ ( in @ X2 @ X1 )
              @ ( ^ [X4: $o,X5: $o] :
                    ( X4
                   => X5 )
                @ ( in @ X3 @ X2 )
                @ ( in @ X3 @ X1 ) ) ) ) ) ) ).

thf(setunionTransitive,conjecture,
    ( sP5
   => ( sP16
     => ( sP8
       => ( sP31
         => ! [X1: $i] :
              ( ! [X2: $i] :
                  ( ( in @ X2 @ X1 )
                 => ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ( subset @ X3 @ X2 ) ) )
             => ! [X2: $i] :
                  ( ( in @ X2 @ ( setunion @ X1 ) )
                 => ( subset @ X2 @ ( setunion @ X1 ) ) ) ) ) ) ) ) ).

thf(h1,negated_conjecture,
    ~ ( sP5
     => ( sP16
       => ( sP8
         => ( sP31
           => ! [X1: $i] :
                ( ! [X2: $i] :
                    ( ( in @ X2 @ X1 )
                   => ! [X3: $i] :
                        ( ( in @ X3 @ X2 )
                       => ( subset @ X3 @ X2 ) ) )
               => ! [X2: $i] :
                    ( ( in @ X2 @ ( setunion @ X1 ) )
                   => ( subset @ X2 @ ( setunion @ X1 ) ) ) ) ) ) ) ),
    inference(assume_negation,[status(cth)],[setunionTransitive]) ).

thf(h2,assumption,
    sP5,
    introduced(assumption,[]) ).

thf(h3,assumption,
    ~ ( sP16
     => ( sP8
       => ( sP31
         => ! [X1: $i] :
              ( ! [X2: $i] :
                  ( ( in @ X2 @ X1 )
                 => ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ( subset @ X3 @ X2 ) ) )
             => ! [X2: $i] :
                  ( ( in @ X2 @ ( setunion @ X1 ) )
                 => ( subset @ X2 @ ( setunion @ X1 ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h4,assumption,
    sP16,
    introduced(assumption,[]) ).

thf(h5,assumption,
    ~ ( sP8
     => ( sP31
       => ! [X1: $i] :
            ( ! [X2: $i] :
                ( ( in @ X2 @ X1 )
               => ! [X3: $i] :
                    ( ( in @ X3 @ X2 )
                   => ( subset @ X3 @ X2 ) ) )
           => ! [X2: $i] :
                ( ( in @ X2 @ ( setunion @ X1 ) )
               => ( subset @ X2 @ ( setunion @ X1 ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h6,assumption,
    sP8,
    introduced(assumption,[]) ).

thf(h7,assumption,
    ~ ( sP31
     => ! [X1: $i] :
          ( ! [X2: $i] :
              ( ( in @ X2 @ X1 )
             => ! [X3: $i] :
                  ( ( in @ X3 @ X2 )
                 => ( subset @ X3 @ X2 ) ) )
         => ! [X2: $i] :
              ( ( in @ X2 @ ( setunion @ X1 ) )
             => ( subset @ X2 @ ( setunion @ X1 ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h8,assumption,
    sP31,
    introduced(assumption,[]) ).

thf(h9,assumption,
    ~ ! [X1: $i] :
        ( ! [X2: $i] :
            ( ( in @ X2 @ X1 )
           => ! [X3: $i] :
                ( ( in @ X3 @ X2 )
               => ( subset @ X3 @ X2 ) ) )
       => ! [X2: $i] :
            ( ( in @ X2 @ ( setunion @ X1 ) )
           => ( subset @ X2 @ ( setunion @ X1 ) ) ) ),
    introduced(assumption,[]) ).

thf(h10,assumption,
    ~ ( sP21
     => ! [X1: $i] :
          ( ( in @ X1 @ ( setunion @ eigen__0 ) )
         => ( subset @ X1 @ ( setunion @ eigen__0 ) ) ) ),
    introduced(assumption,[]) ).

thf(h11,assumption,
    sP21,
    introduced(assumption,[]) ).

thf(h12,assumption,
    ~ ! [X1: $i] :
        ( ( in @ X1 @ ( setunion @ eigen__0 ) )
       => ( subset @ X1 @ ( setunion @ eigen__0 ) ) ),
    introduced(assumption,[]) ).

thf(h13,assumption,
    ~ ( sP1
     => sP22 ),
    introduced(assumption,[]) ).

thf(h14,assumption,
    sP1,
    introduced(assumption,[]) ).

thf(h15,assumption,
    ~ sP22,
    introduced(assumption,[]) ).

thf(1,plain,
    ( ~ sP32
    | ~ sP30
    | sP25 ),
    inference(prop_rule,[status(thm)],]) ).

thf(2,plain,
    ( ~ sP15
    | ~ sP10
    | sP32 ),
    inference(prop_rule,[status(thm)],]) ).

thf(3,plain,
    ( ~ sP2
    | ~ sP12
    | sP10 ),
    inference(prop_rule,[status(thm)],]) ).

thf(4,plain,
    ( ~ sP26
    | sP15 ),
    inference(all_rule,[status(thm)],]) ).

thf(5,plain,
    ( ~ sP28
    | ~ sP29
    | sP2 ),
    inference(prop_rule,[status(thm)],]) ).

thf(6,plain,
    ( ~ sP23
    | sP26 ),
    inference(all_rule,[status(thm)],]) ).

thf(7,plain,
    ( ~ sP17
    | sP28 ),
    inference(all_rule,[status(thm)],]) ).

thf(8,plain,
    ( ~ sP3
    | sP17 ),
    inference(all_rule,[status(thm)],]) ).

thf(9,plain,
    ( ~ sP4
    | ~ sP30
    | sP7 ),
    inference(prop_rule,[status(thm)],]) ).

thf(10,plain,
    ( ~ sP14
    | ~ sP7
    | sP3 ),
    inference(prop_rule,[status(thm)],]) ).

thf(11,plain,
    ( ~ sP31
    | sP14 ),
    inference(all_rule,[status(thm)],]) ).

thf(12,plain,
    ( ~ sP21
    | sP4 ),
    inference(all_rule,[status(thm)],]) ).

thf(13,plain,
    ( sP9
    | ~ sP25 ),
    inference(prop_rule,[status(thm)],]) ).

thf(14,plain,
    ( sP9
    | sP12 ),
    inference(prop_rule,[status(thm)],]) ).

thf(15,plain,
    ( sP27
    | ~ sP9 ),
    inference(eigen_choice_rule,[status(thm),assumptions([h0])],[h0,eigendef_eigen__10]) ).

thf(16,plain,
    ( ~ sP11
    | ~ sP27
    | sP22 ),
    inference(prop_rule,[status(thm)],]) ).

thf(17,plain,
    ( ~ sP20
    | sP11 ),
    inference(all_rule,[status(thm)],]) ).

thf(18,plain,
    ( sP19
    | sP30 ),
    inference(prop_rule,[status(thm)],]) ).

thf(19,plain,
    ( sP19
    | sP29 ),
    inference(prop_rule,[status(thm)],]) ).

thf(20,plain,
    ( sP13
    | ~ sP19 ),
    inference(eigen_choice_rule,[status(thm),assumptions([h0])],[h0,eigendef_eigen__8]) ).

thf(21,plain,
    ( ~ sP6
    | ~ sP13 ),
    inference(all_rule,[status(thm)],]) ).

thf(22,plain,
    ( ~ sP24
    | ~ sP1
    | sP6 ),
    inference(prop_rule,[status(thm)],]) ).

thf(23,plain,
    ( ~ sP8
    | sP20 ),
    inference(all_rule,[status(thm)],]) ).

thf(24,plain,
    ( ~ sP18
    | sP24 ),
    inference(all_rule,[status(thm)],]) ).

thf(25,plain,
    ( ~ sP5
    | sP23 ),
    inference(all_rule,[status(thm)],]) ).

thf(26,plain,
    ( ~ sP16
    | sP18 ),
    inference(all_rule,[status(thm)],]) ).

thf(27,plain,
    $false,
    inference(prop_unsat,[status(thm),assumptions([h14,h15,h13,h11,h12,h10,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0])],[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,h2,h4,h6,h8,h11,h14,h15]) ).

thf(28,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h13,h11,h12,h10,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h14,h15])],[h13,27,h14,h15]) ).

thf(29,plain,
    $false,
    inference(tab_negall,[status(thm),assumptions([h11,h12,h10,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negall(discharge,[h13]),tab_negall(eigenvar,eigen__1)],[h12,28,h13]) ).

thf(30,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h10,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h11,h12])],[h10,29,h11,h12]) ).

thf(31,plain,
    $false,
    inference(tab_negall,[status(thm),assumptions([h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negall(discharge,[h10]),tab_negall(eigenvar,eigen__0)],[h9,30,h10]) ).

thf(32,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h8,h9])],[h7,31,h8,h9]) ).

thf(33,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h6,h7])],[h5,32,h6,h7]) ).

thf(34,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h2,h3,h1,h0]),tab_negimp(discharge,[h4,h5])],[h3,33,h4,h5]) ).

thf(35,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h1,h0]),tab_negimp(discharge,[h2,h3])],[h1,34,h2,h3]) ).

thf(36,plain,
    $false,
    inference(eigenvar_choice,[status(thm),assumptions([h1]),eigenvar_choice(discharge,[h0])],[35,h0]) ).

thf(0,theorem,
    ( sP5
   => ( sP16
     => ( sP8
       => ( sP31
         => ! [X1: $i] :
              ( ! [X2: $i] :
                  ( ( in @ X2 @ X1 )
                 => ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ( subset @ X3 @ X2 ) ) )
             => ! [X2: $i] :
                  ( ( in @ X2 @ ( setunion @ X1 ) )
                 => ( subset @ X2 @ ( setunion @ X1 ) ) ) ) ) ) ) ),
    inference(contra,[status(thm),contra(discharge,[h1])],[35,h1]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.12  % Problem  : SEU815^2 : TPTP v8.1.2. Released v3.7.0.
% 0.00/0.12  % Command  : lash -P picomus -M modes -p tstp -t %d %s
% 0.12/0.33  % Computer : n018.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  : 300
% 0.12/0.33  % DateTime : Wed Aug 23 22:09:42 EDT 2023
% 0.12/0.33  % CPUTime  : 
% 148.42/148.81  % SZS status Theorem
% 148.42/148.81  % Mode: cade22grackle2x01b3
% 148.42/148.81  % Steps: 32679
% 148.42/148.81  % SZS output start Proof
% See solution above
%------------------------------------------------------------------------------