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DT2H2X---1.9.5.THM-Ref.s

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%------------------------------------------------------------------------------
% File     : DT2H2X---1.9.5
% Problem  : SEU731^2 : TPTP v9.2.1. Released v3.7.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : /export/starexec/sandbox/solver/bin/run_DT2H2X /export/starexec/sandbox/benchmark/theBenchmark.p 300

% Computer : n002.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 : Wed Feb 25 09:36:44 AM UTC 2026

% Result   : Theorem 1.77s 1.54s
% Output   : Refutation 1.77s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   33
%            Number of leaves      :    5
% Syntax   : Number of formulae    :   77 (  74 unt;   0 typ;   0 def)
%            Number of atoms       :  842 ( 114 equ;   0 cnn)
%            Maximal formula atoms :    6 (  10 avg)
%            Number of connectives : 1875 (   6   ~;   0   |;   0   &;1386   @)
%                                         (   0 <=>; 317  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   11 (   2 avg)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :    0 (   0   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :   14 (  10 usr;   9 con; 0-2 aty)
%                                         ( 166  !!;   0  ??;   0 @@+;   0 @@-)
%            Number of variables   :  235 ( 177   ^;  58   !;   0   ?; 235   :)

% Comments : 
%------------------------------------------------------------------------------
thf(func_def_0,type,
    in: $i > $i > $o ).

thf(func_def_1,type,
    powerset: $i > $i ).

thf(func_def_2,type,
    setminus: $i > $i > $i ).

thf(func_def_20,type,
    ph1: 
      !>[X0: $tType] : X0 ).

thf(f221,plain,
    $false,
    inference(subsumption_resolution,[status(thm)],[f216,f68]) ).

thf(f68,plain,
    ( ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) )
   != sK3 ),
    inference(equality_proxy_clausification,[status(thm)],[f56]) ).

thf(f56,plain,
    ( $false
    = ( ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) )
      = sK3 ) ),
    inference(binary_proxy_clausification,[status(thm)],[f55]) ).

thf(f55,plain,
    ( $false
    = ( ( in @ sK3 @ ( powerset @ sK2 ) )
     => ( ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) )
        = sK3 ) ) ),
    inference(beta_eta_normalization,[status(thm)],[f54]) ).

thf(f54,plain,
    ( $false
    = ( ^ [Y0: $i] :
          ( ( in @ Y0 @ ( powerset @ sK2 ) )
         => ( ( setminus @ sK2 @ ( setminus @ sK2 @ Y0 ) )
            = Y0 ) )
      @ sK3 ) ),
    inference(sigma_clausification,[status(thm)],[f53]) ).

thf(f53,plain,
    ( $false
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( ( in @ Y0 @ ( powerset @ sK2 ) )
         => ( ( setminus @ sK2 @ ( setminus @ sK2 @ Y0 ) )
            = Y0 ) ) ) ),
    inference(beta_eta_normalization,[status(thm)],[f52]) ).

thf(f52,plain,
    ( $false
    = ( ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                = Y1 ) ) )
      @ sK2 ) ),
    inference(sigma_clausification,[status(thm)],[f51]) ).

thf(f51,plain,
    ( $false
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                = Y1 ) ) ) ) ),
    inference(boolean_simplification,[status(thm)],[f50]) ).

thf(f50,plain,
    ( $false
    = ( $true
     => ( !! @ $i
        @ ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y1 @ ( powerset @ Y0 ) )
               => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                  = Y1 ) ) ) ) ) ),
    inference(backward_demodulation,[status(thm)],[f45,f49]) ).

thf(f49,plain,
    ( ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( !! @ $i
                @ ^ [Y2: $i] :
                    ( ( in @ Y2 @ Y0 )
                   => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                     => ( in @ Y2 @ Y1 ) ) ) ) ) ) )
    = $true ),
    inference(binary_proxy_clausification,[status(thm)],[f45]) ).

thf(f45,plain,
    ( $false
    = ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y1 @ ( powerset @ Y0 ) )
               => ( !! @ $i
                  @ ^ [Y2: $i] :
                      ( ( in @ Y2 @ Y0 )
                     => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                       => ( in @ Y2 @ Y1 ) ) ) ) ) ) )
     => ( !! @ $i
        @ ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y1 @ ( powerset @ Y0 ) )
               => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                  = Y1 ) ) ) ) ) ),
    inference(boolean_simplification,[status(thm)],[f44]) ).

thf(f44,plain,
    ( $false
    = ( $true
     => ( ( !! @ $i
          @ ^ [Y0: $i] :
              ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ ( powerset @ Y0 ) )
                 => ( !! @ $i
                    @ ^ [Y2: $i] :
                        ( ( in @ Y2 @ Y0 )
                       => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                         => ( in @ Y2 @ Y1 ) ) ) ) ) ) )
       => ( !! @ $i
          @ ^ [Y0: $i] :
              ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ ( powerset @ Y0 ) )
                 => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                    = Y1 ) ) ) ) ) ) ),
    inference(backward_demodulation,[status(thm)],[f41,f43]) ).

thf(f43,plain,
    ( ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y0 @ ( powerset @ Y1 ) )
             => ( !! @ $i
                @ ^ [Y2: $i] :
                    ( ( in @ Y2 @ Y1 )
                   => ( ( in @ Y2 @ Y0 )
                     => ( in @ Y2 @ ( setminus @ Y1 @ ( setminus @ Y1 @ Y0 ) ) ) ) ) ) ) ) )
    = $true ),
    inference(binary_proxy_clausification,[status(thm)],[f41]) ).

thf(f41,plain,
    ( $false
    = ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y0 @ ( powerset @ Y1 ) )
               => ( !! @ $i
                  @ ^ [Y2: $i] :
                      ( ( in @ Y2 @ Y1 )
                     => ( ( in @ Y2 @ Y0 )
                       => ( in @ Y2 @ ( setminus @ Y1 @ ( setminus @ Y1 @ Y0 ) ) ) ) ) ) ) ) )
     => ( ( !! @ $i
          @ ^ [Y0: $i] :
              ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ ( powerset @ Y0 ) )
                 => ( !! @ $i
                    @ ^ [Y2: $i] :
                        ( ( in @ Y2 @ Y0 )
                       => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                         => ( in @ Y2 @ Y1 ) ) ) ) ) ) )
       => ( !! @ $i
          @ ^ [Y0: $i] :
              ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ ( powerset @ Y0 ) )
                 => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                    = Y1 ) ) ) ) ) ) ),
    inference(boolean_simplification,[status(thm)],[f40]) ).

thf(f40,plain,
    ( $false
    = ( $true
     => ( ( !! @ $i
          @ ^ [Y0: $i] :
              ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y0 @ ( powerset @ Y1 ) )
                 => ( !! @ $i
                    @ ^ [Y2: $i] :
                        ( ( in @ Y2 @ Y1 )
                       => ( ( in @ Y2 @ Y0 )
                         => ( in @ Y2 @ ( setminus @ Y1 @ ( setminus @ Y1 @ Y0 ) ) ) ) ) ) ) ) )
       => ( ( !! @ $i
            @ ^ [Y0: $i] :
                ( !! @ $i
                @ ^ [Y1: $i] :
                    ( ( in @ Y1 @ ( powerset @ Y0 ) )
                   => ( !! @ $i
                      @ ^ [Y2: $i] :
                          ( ( in @ Y2 @ Y0 )
                         => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                           => ( in @ Y2 @ Y1 ) ) ) ) ) ) )
         => ( !! @ $i
            @ ^ [Y0: $i] :
                ( !! @ $i
                @ ^ [Y1: $i] :
                    ( ( in @ Y1 @ ( powerset @ Y0 ) )
                   => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                      = Y1 ) ) ) ) ) ) ) ),
    inference(backward_demodulation,[status(thm)],[f27,f39]) ).

thf(f39,plain,
    ( ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( !! @ $i
                @ ^ [Y2: $i] :
                    ( ( in @ Y2 @ ( powerset @ Y0 ) )
                   => ( ( !! @ $i
                        @ ^ [Y3: $i] :
                            ( ( in @ Y3 @ Y0 )
                           => ( ( in @ Y3 @ Y1 )
                             => ( in @ Y3 @ Y2 ) ) ) )
                     => ( ( !! @ $i
                          @ ^ [Y3: $i] :
                              ( ( in @ Y3 @ Y0 )
                             => ( ( in @ Y3 @ Y2 )
                               => ( in @ Y3 @ Y1 ) ) ) )
                       => ( Y1 = Y2 ) ) ) ) ) ) ) )
    = $true ),
    inference(binary_proxy_clausification,[status(thm)],[f27]) ).

thf(f27,plain,
    ( $false
    = ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y1 @ ( powerset @ Y0 ) )
               => ( !! @ $i
                  @ ^ [Y2: $i] :
                      ( ( in @ Y2 @ ( powerset @ Y0 ) )
                     => ( ( !! @ $i
                          @ ^ [Y3: $i] :
                              ( ( in @ Y3 @ Y0 )
                             => ( ( in @ Y3 @ Y1 )
                               => ( in @ Y3 @ Y2 ) ) ) )
                       => ( ( !! @ $i
                            @ ^ [Y3: $i] :
                                ( ( in @ Y3 @ Y0 )
                               => ( ( in @ Y3 @ Y2 )
                                 => ( in @ Y3 @ Y1 ) ) ) )
                         => ( Y1 = Y2 ) ) ) ) ) ) ) )
     => ( ( !! @ $i
          @ ^ [Y0: $i] :
              ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y0 @ ( powerset @ Y1 ) )
                 => ( !! @ $i
                    @ ^ [Y2: $i] :
                        ( ( in @ Y2 @ Y1 )
                       => ( ( in @ Y2 @ Y0 )
                         => ( in @ Y2 @ ( setminus @ Y1 @ ( setminus @ Y1 @ Y0 ) ) ) ) ) ) ) ) )
       => ( ( !! @ $i
            @ ^ [Y0: $i] :
                ( !! @ $i
                @ ^ [Y1: $i] :
                    ( ( in @ Y1 @ ( powerset @ Y0 ) )
                   => ( !! @ $i
                      @ ^ [Y2: $i] :
                          ( ( in @ Y2 @ Y0 )
                         => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                           => ( in @ Y2 @ Y1 ) ) ) ) ) ) )
         => ( !! @ $i
            @ ^ [Y0: $i] :
                ( !! @ $i
                @ ^ [Y1: $i] :
                    ( ( in @ Y1 @ ( powerset @ Y0 ) )
                   => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                      = Y1 ) ) ) ) ) ) ) ),
    inference(binary_proxy_clausification,[status(thm)],[f24]) ).

thf(f24,plain,
    ( $false
    = ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y1 @ ( powerset @ Y0 ) )
               => ( in @ ( setminus @ Y0 @ Y1 ) @ ( powerset @ Y0 ) ) ) ) )
     => ( ( !! @ $i
          @ ^ [Y0: $i] :
              ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ ( powerset @ Y0 ) )
                 => ( !! @ $i
                    @ ^ [Y2: $i] :
                        ( ( in @ Y2 @ ( powerset @ Y0 ) )
                       => ( ( !! @ $i
                            @ ^ [Y3: $i] :
                                ( ( in @ Y3 @ Y0 )
                               => ( ( in @ Y3 @ Y1 )
                                 => ( in @ Y3 @ Y2 ) ) ) )
                         => ( ( !! @ $i
                              @ ^ [Y3: $i] :
                                  ( ( in @ Y3 @ Y0 )
                                 => ( ( in @ Y3 @ Y2 )
                                   => ( in @ Y3 @ Y1 ) ) ) )
                           => ( Y1 = Y2 ) ) ) ) ) ) ) )
       => ( ( !! @ $i
            @ ^ [Y0: $i] :
                ( !! @ $i
                @ ^ [Y1: $i] :
                    ( ( in @ Y0 @ ( powerset @ Y1 ) )
                   => ( !! @ $i
                      @ ^ [Y2: $i] :
                          ( ( in @ Y2 @ Y1 )
                         => ( ( in @ Y2 @ Y0 )
                           => ( in @ Y2 @ ( setminus @ Y1 @ ( setminus @ Y1 @ Y0 ) ) ) ) ) ) ) ) )
         => ( ( !! @ $i
              @ ^ [Y0: $i] :
                  ( !! @ $i
                  @ ^ [Y1: $i] :
                      ( ( in @ Y1 @ ( powerset @ Y0 ) )
                     => ( !! @ $i
                        @ ^ [Y2: $i] :
                            ( ( in @ Y2 @ Y0 )
                           => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                             => ( in @ Y2 @ Y1 ) ) ) ) ) ) )
           => ( !! @ $i
              @ ^ [Y0: $i] :
                  ( !! @ $i
                  @ ^ [Y1: $i] :
                      ( ( in @ Y1 @ ( powerset @ Y0 ) )
                     => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                        = Y1 ) ) ) ) ) ) ) ) ),
    inference(not_proxy_clausification,[status(thm)],[f23]) ).

thf(f23,plain,
    ( ( ~ ( ( !! @ $i
            @ ^ [Y0: $i] :
                ( !! @ $i
                @ ^ [Y1: $i] :
                    ( ( in @ Y1 @ ( powerset @ Y0 ) )
                   => ( in @ ( setminus @ Y0 @ Y1 ) @ ( powerset @ Y0 ) ) ) ) )
         => ( ( !! @ $i
              @ ^ [Y0: $i] :
                  ( !! @ $i
                  @ ^ [Y1: $i] :
                      ( ( in @ Y1 @ ( powerset @ Y0 ) )
                     => ( !! @ $i
                        @ ^ [Y2: $i] :
                            ( ( in @ Y2 @ ( powerset @ Y0 ) )
                           => ( ( !! @ $i
                                @ ^ [Y3: $i] :
                                    ( ( in @ Y3 @ Y0 )
                                   => ( ( in @ Y3 @ Y1 )
                                     => ( in @ Y3 @ Y2 ) ) ) )
                             => ( ( !! @ $i
                                  @ ^ [Y3: $i] :
                                      ( ( in @ Y3 @ Y0 )
                                     => ( ( in @ Y3 @ Y2 )
                                       => ( in @ Y3 @ Y1 ) ) ) )
                               => ( Y1 = Y2 ) ) ) ) ) ) ) )
           => ( ( !! @ $i
                @ ^ [Y0: $i] :
                    ( !! @ $i
                    @ ^ [Y1: $i] :
                        ( ( in @ Y0 @ ( powerset @ Y1 ) )
                       => ( !! @ $i
                          @ ^ [Y2: $i] :
                              ( ( in @ Y2 @ Y1 )
                             => ( ( in @ Y2 @ Y0 )
                               => ( in @ Y2 @ ( setminus @ Y1 @ ( setminus @ Y1 @ Y0 ) ) ) ) ) ) ) ) )
             => ( ( !! @ $i
                  @ ^ [Y0: $i] :
                      ( !! @ $i
                      @ ^ [Y1: $i] :
                          ( ( in @ Y1 @ ( powerset @ Y0 ) )
                         => ( !! @ $i
                            @ ^ [Y2: $i] :
                                ( ( in @ Y2 @ Y0 )
                               => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                                 => ( in @ Y2 @ Y1 ) ) ) ) ) ) )
               => ( !! @ $i
                  @ ^ [Y0: $i] :
                      ( !! @ $i
                      @ ^ [Y1: $i] :
                          ( ( in @ Y1 @ ( powerset @ Y0 ) )
                         => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                            = Y1 ) ) ) ) ) ) ) ) )
    = $true ),
    inference(definition_unfolding,[status(thm)],[f18,f20,f22,f19,f21]) ).

thf(f21,plain,
    ( doubleComplementE1
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( !! @ $i
                @ ^ [Y2: $i] :
                    ( ( in @ Y2 @ Y0 )
                   => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                     => ( in @ Y2 @ Y1 ) ) ) ) ) ) ) ),
    inference(cnf_transformation,[status(thm)],[f9]) ).

thf(f9,plain,
    ( doubleComplementE1
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( !! @ $i
                @ ^ [Y2: $i] :
                    ( ( in @ Y2 @ Y0 )
                   => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                     => ( in @ Y2 @ Y1 ) ) ) ) ) ) ) ),
    inference(fool_elimination,[status(thm)],[f8]) ).

thf(f8,plain,
    ! [X0: $i,X1: $i] :
      ( ( ( in @ X0 @ ( powerset @ X1 ) )
       => ! [X2: $i] :
            ( ( in @ X2 @ X1 )
           => ( ( in @ X2 @ ( setminus @ X1 @ ( setminus @ X1 @ X0 ) ) )
             => ( in @ X2 @ X0 ) ) ) )
      = doubleComplementE1 ),
    inference(rectify,[status(thm)],[f4]) ).

thf(f4,axiom,
    ! [X1: $i,X0: $i] :
      ( ( ( in @ X1 @ ( powerset @ X0 ) )
       => ! [X3: $i] :
            ( ( in @ X3 @ X0 )
           => ( ( in @ X3 @ ( setminus @ X0 @ ( setminus @ X0 @ X1 ) ) )
             => ( in @ X3 @ X1 ) ) ) )
      = doubleComplementE1 ),
    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',doubleComplementE1) ).

thf(f19,plain,
    ( doubleComplementI1
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y0 @ ( powerset @ Y1 ) )
             => ( !! @ $i
                @ ^ [Y2: $i] :
                    ( ( in @ Y2 @ Y1 )
                   => ( ( in @ Y2 @ Y0 )
                     => ( in @ Y2 @ ( setminus @ Y1 @ ( setminus @ Y1 @ Y0 ) ) ) ) ) ) ) ) ) ),
    inference(cnf_transformation,[status(thm)],[f15]) ).

thf(f15,plain,
    ( doubleComplementI1
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y0 @ ( powerset @ Y1 ) )
             => ( !! @ $i
                @ ^ [Y2: $i] :
                    ( ( in @ Y2 @ Y1 )
                   => ( ( in @ Y2 @ Y0 )
                     => ( in @ Y2 @ ( setminus @ Y1 @ ( setminus @ Y1 @ Y0 ) ) ) ) ) ) ) ) ) ),
    inference(fool_elimination,[status(thm)],[f14]) ).

thf(f14,plain,
    ! [X0: $i,X1: $i] :
      ( ( ( in @ X1 @ ( powerset @ X0 ) )
       => ! [X2: $i] :
            ( ( in @ X2 @ X0 )
           => ( ( in @ X2 @ X1 )
             => ( in @ X2 @ ( setminus @ X0 @ ( setminus @ X0 @ X1 ) ) ) ) ) )
      = doubleComplementI1 ),
    inference(rectify,[status(thm)],[f3]) ).

thf(f3,axiom,
    ! [X0: $i,X1: $i] :
      ( ( ( in @ X1 @ ( powerset @ X0 ) )
       => ! [X3: $i] :
            ( ( in @ X3 @ X0 )
           => ( ( in @ X3 @ X1 )
             => ( in @ X3 @ ( setminus @ X0 @ ( setminus @ X0 @ X1 ) ) ) ) ) )
      = doubleComplementI1 ),
    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',doubleComplementI1) ).

thf(f22,plain,
    ( setextT
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( !! @ $i
                @ ^ [Y2: $i] :
                    ( ( in @ Y2 @ ( powerset @ Y0 ) )
                   => ( ( !! @ $i
                        @ ^ [Y3: $i] :
                            ( ( in @ Y3 @ Y0 )
                           => ( ( in @ Y3 @ Y1 )
                             => ( in @ Y3 @ Y2 ) ) ) )
                     => ( ( !! @ $i
                          @ ^ [Y3: $i] :
                              ( ( in @ Y3 @ Y0 )
                             => ( ( in @ Y3 @ Y2 )
                               => ( in @ Y3 @ Y1 ) ) ) )
                       => ( Y1 = Y2 ) ) ) ) ) ) ) ) ),
    inference(cnf_transformation,[status(thm)],[f17]) ).

thf(f17,plain,
    ( setextT
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( !! @ $i
                @ ^ [Y2: $i] :
                    ( ( in @ Y2 @ ( powerset @ Y0 ) )
                   => ( ( !! @ $i
                        @ ^ [Y3: $i] :
                            ( ( in @ Y3 @ Y0 )
                           => ( ( in @ Y3 @ Y1 )
                             => ( in @ Y3 @ Y2 ) ) ) )
                     => ( ( !! @ $i
                          @ ^ [Y3: $i] :
                              ( ( in @ Y3 @ Y0 )
                             => ( ( in @ Y3 @ Y2 )
                               => ( in @ Y3 @ Y1 ) ) ) )
                       => ( Y1 = Y2 ) ) ) ) ) ) ) ) ),
    inference(fool_elimination,[status(thm)],[f16]) ).

thf(f16,plain,
    ( setextT
    = ( ! [X0: $i,X1: $i] :
          ( ( in @ X0 @ ( powerset @ X1 ) )
         => ! [X2: $i] :
              ( ( in @ X2 @ ( powerset @ X1 ) )
             => ( ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( ( in @ X3 @ X0 )
                     => ( in @ X3 @ X2 ) ) )
               => ( ! [X4: $i] :
                      ( ( in @ X4 @ X1 )
                     => ( ( in @ X4 @ X2 )
                       => ( in @ X4 @ X0 ) ) )
                 => ( X0 = X2 ) ) ) ) ) ) ),
    inference(rectify,[status(thm)],[f2]) ).

thf(f2,axiom,
    ( setextT
    = ( ! [X1: $i,X0: $i] :
          ( ( in @ X1 @ ( powerset @ X0 ) )
         => ! [X2: $i] :
              ( ( in @ X2 @ ( powerset @ X0 ) )
             => ( ! [X3: $i] :
                    ( ( in @ X3 @ X0 )
                   => ( ( in @ X3 @ X1 )
                     => ( in @ X3 @ X2 ) ) )
               => ( ! [X3: $i] :
                      ( ( in @ X3 @ X0 )
                     => ( ( in @ X3 @ X2 )
                       => ( in @ X3 @ X1 ) ) )
                 => ( X1 = X2 ) ) ) ) ) ) ),
    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',setextT) ).

thf(f20,plain,
    ( complementT_lem
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( in @ ( setminus @ Y0 @ Y1 ) @ ( powerset @ Y0 ) ) ) ) ) ),
    inference(cnf_transformation,[status(thm)],[f11]) ).

thf(f11,plain,
    ( complementT_lem
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( in @ ( setminus @ Y0 @ Y1 ) @ ( powerset @ Y0 ) ) ) ) ) ),
    inference(fool_elimination,[status(thm)],[f10]) ).

thf(f10,plain,
    ! [X0: $i,X1: $i] :
      ( ( ( in @ X0 @ ( powerset @ X1 ) )
       => ( in @ ( setminus @ X1 @ X0 ) @ ( powerset @ X1 ) ) )
      = complementT_lem ),
    inference(rectify,[status(thm)],[f1]) ).

thf(f1,axiom,
    ! [X1: $i,X0: $i] :
      ( ( ( in @ X1 @ ( powerset @ X0 ) )
       => ( in @ ( setminus @ X0 @ X1 ) @ ( powerset @ X0 ) ) )
      = complementT_lem ),
    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',complementT_lem) ).

thf(f18,plain,
    ( ( ~ ( complementT_lem
         => ( setextT
           => ( doubleComplementI1
             => ( doubleComplementE1
               => ( !! @ $i
                  @ ^ [Y0: $i] :
                      ( !! @ $i
                      @ ^ [Y1: $i] :
                          ( ( in @ Y1 @ ( powerset @ Y0 ) )
                         => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                            = Y1 ) ) ) ) ) ) ) ) )
    = $true ),
    inference(cnf_transformation,[status(thm)],[f13]) ).

thf(f13,plain,
    ( ( ~ ( complementT_lem
         => ( setextT
           => ( doubleComplementI1
             => ( doubleComplementE1
               => ( !! @ $i
                  @ ^ [Y0: $i] :
                      ( !! @ $i
                      @ ^ [Y1: $i] :
                          ( ( in @ Y1 @ ( powerset @ Y0 ) )
                         => ( ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) )
                            = Y1 ) ) ) ) ) ) ) ) )
    = $true ),
    inference(fool_elimination,[status(thm)],[f12]) ).

thf(f12,plain,
    ~ ( complementT_lem
     => ( setextT
       => ( doubleComplementI1
         => ( doubleComplementE1
           => ! [X0: $i,X1: $i] :
                ( ( in @ X0 @ ( powerset @ X1 ) )
               => ( ( setminus @ X1 @ ( setminus @ X1 @ X0 ) )
                  = X0 ) ) ) ) ) ),
    inference(rectify,[status(thm)],[f6]) ).

thf(f6,negated_conjecture,
    ~ ( complementT_lem
     => ( setextT
       => ( doubleComplementI1
         => ( doubleComplementE1
           => ! [X1: $i,X0: $i] :
                ( ( in @ X1 @ ( powerset @ X0 ) )
               => ( ( setminus @ X0 @ ( setminus @ X0 @ X1 ) )
                  = X1 ) ) ) ) ) ),
    inference(negated_conjecture,[status(cth)],[f5]) ).

thf(f5,conjecture,
    ( complementT_lem
   => ( setextT
     => ( doubleComplementI1
       => ( doubleComplementE1
         => ! [X1: $i,X0: $i] :
              ( ( in @ X1 @ ( powerset @ X0 ) )
             => ( ( setminus @ X0 @ ( setminus @ X0 @ X1 ) )
                = X1 ) ) ) ) ) ),
    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',doubleComplementEq) ).

thf(f216,plain,
    ( ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) )
    = sK3 ),
    inference(equality_proxy_clausification,[status(thm)],[f207]) ).

thf(f207,plain,
    ( ( sK3
      = ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) )
    = $true ),
    inference(boolean_simplification,[status(thm)],[f206]) ).

thf(f206,plain,
    ( $true
    = ( $true
     => ( sK3
        = ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) ) ) ),
    inference(forward_demodulation,[status(thm)],[f205,f115]) ).

thf(f115,plain,
    ( ( !! @ $i
      @ ^ [Y0: $i] :
          ( ( in @ Y0 @ sK2 )
         => ( ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) )
           => ( in @ Y0 @ sK3 ) ) ) )
    = $true ),
    inference(boolean_simplification,[status(thm)],[f105]) ).

thf(f105,plain,
    ( ( $true
     => ( !! @ $i
        @ ^ [Y0: $i] :
            ( ( in @ Y0 @ sK2 )
           => ( ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) )
             => ( in @ Y0 @ sK3 ) ) ) ) )
    = $true ),
    inference(superposition,[status(thm)],[f97,f57]) ).

thf(f57,plain,
    ( ( in @ sK3 @ ( powerset @ sK2 ) )
    = $true ),
    inference(binary_proxy_clausification,[status(thm)],[f55]) ).

thf(f97,plain,
    ! [X2: $i,X1: $i] :
      ( $true
      = ( ( in @ X2 @ ( powerset @ X1 ) )
       => ( !! @ $i
          @ ^ [Y0: $i] :
              ( ( in @ Y0 @ X1 )
             => ( ( in @ Y0 @ ( setminus @ X1 @ ( setminus @ X1 @ X2 ) ) )
               => ( in @ Y0 @ X2 ) ) ) ) ) ),
    inference(beta_eta_normalization,[status(thm)],[f96]) ).

thf(f96,plain,
    ! [X2: $i,X1: $i] :
      ( ( ^ [Y0: $i] :
            ( ( in @ Y0 @ ( powerset @ X1 ) )
           => ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ X1 )
                 => ( ( in @ Y1 @ ( setminus @ X1 @ ( setminus @ X1 @ Y0 ) ) )
                   => ( in @ Y1 @ Y0 ) ) ) ) )
        @ X2 )
      = $true ),
    inference(pi_clausification,[status(thm)],[f89]) ).

thf(f89,plain,
    ! [X1: $i] :
      ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( ( in @ Y0 @ ( powerset @ X1 ) )
           => ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ X1 )
                 => ( ( in @ Y1 @ ( setminus @ X1 @ ( setminus @ X1 @ Y0 ) ) )
                   => ( in @ Y1 @ Y0 ) ) ) ) ) )
      = $true ),
    inference(beta_eta_normalization,[status(thm)],[f88]) ).

thf(f88,plain,
    ! [X1: $i] :
      ( ( ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y1 @ ( powerset @ Y0 ) )
               => ( !! @ $i
                  @ ^ [Y2: $i] :
                      ( ( in @ Y2 @ Y0 )
                     => ( ( in @ Y2 @ ( setminus @ Y0 @ ( setminus @ Y0 @ Y1 ) ) )
                       => ( in @ Y2 @ Y1 ) ) ) ) ) )
        @ X1 )
      = $true ),
    inference(pi_clausification,[status(thm)],[f49]) ).

thf(f205,plain,
    ( $true
    = ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( ( in @ Y0 @ sK2 )
           => ( ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) )
             => ( in @ Y0 @ sK3 ) ) ) )
     => ( sK3
        = ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) ) ) ),
    inference(boolean_simplification,[status(thm)],[f204]) ).

thf(f204,plain,
    ( ( $true
     => ( ( !! @ $i
          @ ^ [Y0: $i] :
              ( ( in @ Y0 @ sK2 )
             => ( ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) )
               => ( in @ Y0 @ sK3 ) ) ) )
       => ( sK3
          = ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) ) ) )
    = $true ),
    inference(forward_demodulation,[status(thm)],[f203,f80]) ).

thf(f80,plain,
    ( ( !! @ $i
      @ ^ [Y0: $i] :
          ( ( in @ Y0 @ sK2 )
         => ( ( in @ Y0 @ sK3 )
           => ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) ) ) ) )
    = $true ),
    inference(boolean_simplification,[status(thm)],[f76]) ).

thf(f76,plain,
    ( ( $true
     => ( !! @ $i
        @ ^ [Y0: $i] :
            ( ( in @ Y0 @ sK2 )
           => ( ( in @ Y0 @ sK3 )
             => ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) ) ) ) ) )
    = $true ),
    inference(superposition,[status(thm)],[f70,f57]) ).

thf(f70,plain,
    ! [X2: $i,X1: $i] :
      ( ( ( in @ X1 @ ( powerset @ X2 ) )
       => ( !! @ $i
          @ ^ [Y0: $i] :
              ( ( in @ Y0 @ X2 )
             => ( ( in @ Y0 @ X1 )
               => ( in @ Y0 @ ( setminus @ X2 @ ( setminus @ X2 @ X1 ) ) ) ) ) ) )
      = $true ),
    inference(beta_eta_normalization,[status(thm)],[f69]) ).

thf(f69,plain,
    ! [X2: $i,X1: $i] :
      ( ( ^ [Y0: $i] :
            ( ( in @ X1 @ ( powerset @ Y0 ) )
           => ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ Y0 )
                 => ( ( in @ Y1 @ X1 )
                   => ( in @ Y1 @ ( setminus @ Y0 @ ( setminus @ Y0 @ X1 ) ) ) ) ) ) )
        @ X2 )
      = $true ),
    inference(pi_clausification,[status(thm)],[f47]) ).

thf(f47,plain,
    ! [X1: $i] :
      ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( ( in @ X1 @ ( powerset @ Y0 ) )
           => ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ Y0 )
                 => ( ( in @ Y1 @ X1 )
                   => ( in @ Y1 @ ( setminus @ Y0 @ ( setminus @ Y0 @ X1 ) ) ) ) ) ) ) )
      = $true ),
    inference(beta_eta_normalization,[status(thm)],[f46]) ).

thf(f46,plain,
    ! [X1: $i] :
      ( ( ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y0 @ ( powerset @ Y1 ) )
               => ( !! @ $i
                  @ ^ [Y2: $i] :
                      ( ( in @ Y2 @ Y1 )
                     => ( ( in @ Y2 @ Y0 )
                       => ( in @ Y2 @ ( setminus @ Y1 @ ( setminus @ Y1 @ Y0 ) ) ) ) ) ) ) )
        @ X1 )
      = $true ),
    inference(pi_clausification,[status(thm)],[f43]) ).

thf(f203,plain,
    ( ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( ( in @ Y0 @ sK2 )
           => ( ( in @ Y0 @ sK3 )
             => ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) ) ) ) )
     => ( ( !! @ $i
          @ ^ [Y0: $i] :
              ( ( in @ Y0 @ sK2 )
             => ( ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) )
               => ( in @ Y0 @ sK3 ) ) ) )
       => ( sK3
          = ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) ) ) )
    = $true ),
    inference(boolean_simplification,[status(thm)],[f183]) ).

thf(f183,plain,
    ( ( $true
     => ( ( !! @ $i
          @ ^ [Y0: $i] :
              ( ( in @ Y0 @ sK2 )
             => ( ( in @ Y0 @ sK3 )
               => ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) ) ) ) )
       => ( ( !! @ $i
            @ ^ [Y0: $i] :
                ( ( in @ Y0 @ sK2 )
               => ( ( in @ Y0 @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) )
                 => ( in @ Y0 @ sK3 ) ) ) )
         => ( sK3
            = ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) ) ) ) )
    = $true ),
    inference(superposition,[status(thm)],[f166,f67]) ).

thf(f67,plain,
    ( ( in @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) @ ( powerset @ sK2 ) )
    = $true ),
    inference(boolean_simplification,[status(thm)],[f65]) ).

thf(f65,plain,
    ( $true
    = ( $true
     => ( in @ ( setminus @ sK2 @ ( setminus @ sK2 @ sK3 ) ) @ ( powerset @ sK2 ) ) ) ),
    inference(superposition,[status(thm)],[f36,f63]) ).

thf(f63,plain,
    ( ( in @ ( setminus @ sK2 @ sK3 ) @ ( powerset @ sK2 ) )
    = $true ),
    inference(boolean_simplification,[status(thm)],[f62]) ).

thf(f62,plain,
    ( ( $true
     => ( in @ ( setminus @ sK2 @ sK3 ) @ ( powerset @ sK2 ) ) )
    = $true ),
    inference(superposition,[status(thm)],[f36,f57]) ).

thf(f36,plain,
    ! [X2: $i,X1: $i] :
      ( $true
      = ( ( in @ X2 @ ( powerset @ X1 ) )
       => ( in @ ( setminus @ X1 @ X2 ) @ ( powerset @ X1 ) ) ) ),
    inference(beta_eta_normalization,[status(thm)],[f35]) ).

thf(f35,plain,
    ! [X2: $i,X1: $i] :
      ( ( ^ [Y0: $i] :
            ( ( in @ Y0 @ ( powerset @ X1 ) )
           => ( in @ ( setminus @ X1 @ Y0 ) @ ( powerset @ X1 ) ) )
        @ X2 )
      = $true ),
    inference(pi_clausification,[status(thm)],[f34]) ).

thf(f34,plain,
    ! [X1: $i] :
      ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( ( in @ Y0 @ ( powerset @ X1 ) )
           => ( in @ ( setminus @ X1 @ Y0 ) @ ( powerset @ X1 ) ) ) )
      = $true ),
    inference(beta_eta_normalization,[status(thm)],[f33]) ).

thf(f33,plain,
    ! [X1: $i] :
      ( ( ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y1 @ ( powerset @ Y0 ) )
               => ( in @ ( setminus @ Y0 @ Y1 ) @ ( powerset @ Y0 ) ) ) )
        @ X1 )
      = $true ),
    inference(pi_clausification,[status(thm)],[f28]) ).

thf(f28,plain,
    ( ( !! @ $i
      @ ^ [Y0: $i] :
          ( !! @ $i
          @ ^ [Y1: $i] :
              ( ( in @ Y1 @ ( powerset @ Y0 ) )
             => ( in @ ( setminus @ Y0 @ Y1 ) @ ( powerset @ Y0 ) ) ) ) )
    = $true ),
    inference(binary_proxy_clausification,[status(thm)],[f24]) ).

thf(f166,plain,
    ! [X1: $i] :
      ( ( ( in @ X1 @ ( powerset @ sK2 ) )
       => ( ( !! @ $i
            @ ^ [Y0: $i] :
                ( ( in @ Y0 @ sK2 )
               => ( ( in @ Y0 @ sK3 )
                 => ( in @ Y0 @ X1 ) ) ) )
         => ( ( !! @ $i
              @ ^ [Y0: $i] :
                  ( ( in @ Y0 @ sK2 )
                 => ( ( in @ Y0 @ X1 )
                   => ( in @ Y0 @ sK3 ) ) ) )
           => ( sK3 = X1 ) ) ) )
      = $true ),
    inference(beta_eta_normalization,[status(thm)],[f164]) ).

thf(f164,plain,
    ! [X1: $i] :
      ( ( ^ [Y0: $i] :
            ( ( in @ Y0 @ ( powerset @ sK2 ) )
           => ( ( !! @ $i
                @ ^ [Y1: $i] :
                    ( ( in @ Y1 @ sK2 )
                   => ( ( in @ Y1 @ sK3 )
                     => ( in @ Y1 @ Y0 ) ) ) )
             => ( ( !! @ $i
                  @ ^ [Y1: $i] :
                      ( ( in @ Y1 @ sK2 )
                     => ( ( in @ Y1 @ Y0 )
                       => ( in @ Y1 @ sK3 ) ) ) )
               => ( sK3 = Y0 ) ) ) )
        @ X1 )
      = $true ),
    inference(pi_clausification,[status(thm)],[f143]) ).

thf(f143,plain,
    ( $true
    = ( !! @ $i
      @ ^ [Y0: $i] :
          ( ( in @ Y0 @ ( powerset @ sK2 ) )
         => ( ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ sK2 )
                 => ( ( in @ Y1 @ sK3 )
                   => ( in @ Y1 @ Y0 ) ) ) )
           => ( ( !! @ $i
                @ ^ [Y1: $i] :
                    ( ( in @ Y1 @ sK2 )
                   => ( ( in @ Y1 @ Y0 )
                     => ( in @ Y1 @ sK3 ) ) ) )
             => ( sK3 = Y0 ) ) ) ) ) ),
    inference(boolean_simplification,[status(thm)],[f135]) ).

thf(f135,plain,
    ( ( $true
     => ( !! @ $i
        @ ^ [Y0: $i] :
            ( ( in @ Y0 @ ( powerset @ sK2 ) )
           => ( ( !! @ $i
                @ ^ [Y1: $i] :
                    ( ( in @ Y1 @ sK2 )
                   => ( ( in @ Y1 @ sK3 )
                     => ( in @ Y1 @ Y0 ) ) ) )
             => ( ( !! @ $i
                  @ ^ [Y1: $i] :
                      ( ( in @ Y1 @ sK2 )
                     => ( ( in @ Y1 @ Y0 )
                       => ( in @ Y1 @ sK3 ) ) ) )
               => ( sK3 = Y0 ) ) ) ) ) )
    = $true ),
    inference(superposition,[status(thm)],[f132,f57]) ).

thf(f132,plain,
    ! [X2: $i,X1: $i] :
      ( ( ( in @ X2 @ ( powerset @ X1 ) )
       => ( !! @ $i
          @ ^ [Y0: $i] :
              ( ( in @ Y0 @ ( powerset @ X1 ) )
             => ( ( !! @ $i
                  @ ^ [Y1: $i] :
                      ( ( in @ Y1 @ X1 )
                     => ( ( in @ Y1 @ X2 )
                       => ( in @ Y1 @ Y0 ) ) ) )
               => ( ( !! @ $i
                    @ ^ [Y1: $i] :
                        ( ( in @ Y1 @ X1 )
                       => ( ( in @ Y1 @ Y0 )
                         => ( in @ Y1 @ X2 ) ) ) )
                 => ( X2 = Y0 ) ) ) ) ) )
      = $true ),
    inference(beta_eta_normalization,[status(thm)],[f131]) ).

thf(f131,plain,
    ! [X2: $i,X1: $i] :
      ( ( ^ [Y0: $i] :
            ( ( in @ Y0 @ ( powerset @ X1 ) )
           => ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ ( powerset @ X1 ) )
                 => ( ( !! @ $i
                      @ ^ [Y2: $i] :
                          ( ( in @ Y2 @ X1 )
                         => ( ( in @ Y2 @ Y0 )
                           => ( in @ Y2 @ Y1 ) ) ) )
                   => ( ( !! @ $i
                        @ ^ [Y2: $i] :
                            ( ( in @ Y2 @ X1 )
                           => ( ( in @ Y2 @ Y1 )
                             => ( in @ Y2 @ Y0 ) ) ) )
                     => ( Y0 = Y1 ) ) ) ) ) )
        @ X2 )
      = $true ),
    inference(pi_clausification,[status(thm)],[f126]) ).

thf(f126,plain,
    ! [X1: $i] :
      ( ( !! @ $i
        @ ^ [Y0: $i] :
            ( ( in @ Y0 @ ( powerset @ X1 ) )
           => ( !! @ $i
              @ ^ [Y1: $i] :
                  ( ( in @ Y1 @ ( powerset @ X1 ) )
                 => ( ( !! @ $i
                      @ ^ [Y2: $i] :
                          ( ( in @ Y2 @ X1 )
                         => ( ( in @ Y2 @ Y0 )
                           => ( in @ Y2 @ Y1 ) ) ) )
                   => ( ( !! @ $i
                        @ ^ [Y2: $i] :
                            ( ( in @ Y2 @ X1 )
                           => ( ( in @ Y2 @ Y1 )
                             => ( in @ Y2 @ Y0 ) ) ) )
                     => ( Y0 = Y1 ) ) ) ) ) ) )
      = $true ),
    inference(beta_eta_normalization,[status(thm)],[f125]) ).

thf(f125,plain,
    ! [X1: $i] :
      ( ( ^ [Y0: $i] :
            ( !! @ $i
            @ ^ [Y1: $i] :
                ( ( in @ Y1 @ ( powerset @ Y0 ) )
               => ( !! @ $i
                  @ ^ [Y2: $i] :
                      ( ( in @ Y2 @ ( powerset @ Y0 ) )
                     => ( ( !! @ $i
                          @ ^ [Y3: $i] :
                              ( ( in @ Y3 @ Y0 )
                             => ( ( in @ Y3 @ Y1 )
                               => ( in @ Y3 @ Y2 ) ) ) )
                       => ( ( !! @ $i
                            @ ^ [Y3: $i] :
                                ( ( in @ Y3 @ Y0 )
                               => ( ( in @ Y3 @ Y2 )
                                 => ( in @ Y3 @ Y1 ) ) ) )
                         => ( Y1 = Y2 ) ) ) ) ) ) )
        @ X1 )
      = $true ),
    inference(pi_clausification,[status(thm)],[f39]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.12  % Problem  : SEU731^2 : TPTP v9.2.1. Released v3.7.0.
% 0.11/0.13  % Command  : /export/starexec/sandbox/solver/bin/run_DT2H2X /export/starexec/sandbox/benchmark/theBenchmark.p 300
% 0.16/0.34  % Computer : n002.cluster.edu
% 0.16/0.34  % Model    : x86_64 x86_64
% 0.16/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.16/0.34  % Memory   : 8042.1875MB
% 0.16/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.16/0.34  % CPULimit : 300
% 0.16/0.34  % WCLimit  : 300
% 0.16/0.34  % DateTime : Tue Feb 24 12:32:33 EST 2026
% 0.16/0.34  % CPUTime  : 
% 0.16/0.34  Running /export/starexec/sandbox/solver/bin/run_DT2H2X /export/starexec/sandbox/benchmark/theBenchmark.p 300
% 0.29/0.49  ---- Original DTF file ---
% 0.29/0.49  thf(spec,logic,$$dhol).
% 0.29/0.49  %------------------------------------------------------------------------------
% 0.29/0.49  % File     : SEU731^2 : TPTP v9.2.1. Released v3.7.0.
% 0.29/0.49  % Domain   : Set Theory
% 0.29/0.49  % Problem  : Typed Set Theory - Laws for Typed Sets
% 0.29/0.49  % Version  : Especial > Reduced > Especial.
% 0.29/0.49  % English  : (! A:i.! X:i.in X (powerset A) -> X = setminus A (setminus A X))
% 0.29/0.49  
% 0.29/0.49  % Refs     : [Bro08] Brown (2008), Email to G. Sutcliffe
% 0.29/0.49  % Source   : [Bro08]
% 0.29/0.49  % Names    : ZFC233l [Bro08]
% 0.29/0.49  
% 0.29/0.49  % Status   : Theorem
% 0.29/0.49  % Rating   : 0.00 v8.2.0, 0.15 v8.1.0, 0.09 v7.5.0, 0.00 v7.1.0, 0.12 v7.0.0, 0.00 v6.2.0, 0.14 v6.1.0, 0.29 v5.5.0, 0.33 v5.4.0, 0.40 v5.1.0, 0.60 v5.0.0, 0.40 v4.1.0, 0.33 v3.7.0
% 0.29/0.49  % Syntax   : Number of formulae    :   12 (   4 unt;   7 typ;   4 def)
% 0.29/0.49  %            Number of atoms       :   33 (   6 equ;   0 cnn)
% 0.29/0.49  %            Maximal formula atoms :    6 (   6 avg)
% 0.29/0.49  %            Number of connectives :   79 (   0   ~;   0   |;   0   &;  59   @)
% 0.29/0.49  %                                         (   0 <=>;  20  =>;   0  <=;   0 <~>)
% 0.29/0.49  %            Maximal formula depth :   10 (   3 avg)
% 0.29/0.49  %            Number of types       :    2 (   0 usr)
% 0.29/0.49  %            Number of type conns  :    5 (   5   >;   0   *;   0   +;   0  <<)
% 0.29/0.49  %            Number of symbols     :    8 (   7 usr;   4 con; 0-2 aty)
% 0.29/0.49  %            Number of variables   :   15 (   0   ^;  15   !;   0   ?;  15   :)
% 0.29/0.49  % SPC      : TH0_THM_EQU_NAR
% 0.29/0.49  
% 0.29/0.49  % Comments : http://mathgate.info/detsetitem.php?id=291
% 0.29/0.49  %------------------------------------------------------------------------------
% 0.29/0.49  thf(in_type,type,
% 0.29/0.49      in: $i > $i > $o ).
% 0.29/0.49  
% 0.29/0.49  thf(powerset_type,type,
% 0.29/0.49      powerset: $i > $i ).
% 0.29/0.49  
% 0.29/0.49  thf(setminus_type,type,
% 0.29/0.49      setminus: $i > $i > $i ).
% 0.29/0.49  
% 0.29/0.49  thf(complementT_lem_type,type,
% 0.29/0.49      complementT_lem: $o ).
% 0.29/0.49  
% 0.29/0.49  thf(complementT_lem,definition,
% 0.29/0.49      ( complementT_lem
% 0.29/0.49      = ( ! [A: $i,X: $i] :
% 0.29/0.49            ( ( in @ X @ ( powerset @ A ) )
% 0.29/0.49           => ( in @ ( setminus @ A @ X ) @ ( powerset @ A ) ) ) ) ) ).
% 0.29/0.49  
% 0.29/0.49  thf(setextT_type,type,
% 0.29/0.49      setextT: $o ).
% 0.29/0.49  
% 0.29/0.49  thf(setextT,definition,
% 0.29/0.49      ( setextT
% 0.29/0.49      = ( ! [A: $i,X: $i] :
% 0.29/0.49            ( ( in @ X @ ( powerset @ A ) )
% 0.29/0.49           => ! [Y: $i] :
% 0.29/0.49                ( ( in @ Y @ ( powerset @ A ) )
% 0.29/0.49               => ( ! [Xx: $i] :
% 0.29/0.49                      ( ( in @ Xx @ A )
% 0.29/0.49                     => ( ( in @ Xx @ X )
% 0.29/0.49                       => ( in @ Xx @ Y ) ) )
% 0.29/0.49                 => ( ! [Xx: $i] :
% 0.29/0.49                        ( ( in @ Xx @ A )
% 0.29/0.49                       => ( ( in @ Xx @ Y )
% 0.29/0.49                         => ( in @ Xx @ X ) ) )
% 0.29/0.49                   => ( X = Y ) ) ) ) ) ) ) ).
% 0.29/0.49  
% 0.29/0.49  thf(doubleComplementI1_type,type,
% 0.29/0.49      doubleComplementI1: $o ).
% 0.29/0.49  
% 0.29/0.49  thf(doubleComplementI1,definition,
% 0.29/0.49      ( doubleComplementI1
% 0.29/0.49      = ( ! [A: $i,X: $i] :
% 0.29/0.49            ( ( in @ X @ ( powerset @ A ) )
% 0.29/0.49           => ! [Xx: $i] :
% 0.29/0.49                ( ( in @ Xx @ A )
% 0.29/0.49               => ( ( in @ Xx @ X )
% 0.29/0.49                 => ( in @ Xx @ ( setminus @ A @ ( setminus @ A @ X ) ) ) ) ) ) ) ) ).
% 0.29/0.49  
% 0.29/0.49  thf(doubleComplementE1_type,type,
% 0.29/0.49      doubleComplementE1: $o ).
% 0.29/0.49  
% 0.29/0.49  thf(doubleComplementE1,definition,
% 0.29/0.49      ( doubleComplementE1
% 0.29/0.49      = ( ! [A: $i,X: $i] :
% 0.29/0.49            ( ( in @ X @ ( powerset @ A ) )
% 0.29/0.49           => ! [Xx: $i] :
% 0.29/0.49                ( ( in @ Xx @ A )
% 0.29/0.49               => ( ( in @ Xx @ ( setminus @ A @ ( setminus @ A @ X ) ) )
% 0.29/0.49                 => ( in @ Xx @ X ) ) ) ) ) ) ).
% 0.29/0.49  
% 0.29/0.49  thf(doubleComplementEq,conjecture,
% 0.29/0.49      ( complementT_lem
% 0.29/0.49     => ( setextT
% 0.29/0.49       => ( doubleComplementI1
% 0.29/0.49         => ( doubleComplementE1
% 0.29/0.49           => ! [A: $i,X: $i] :
% 0.29/0.49                ( ( in @ X @ ( powerset @ A ) )
% 0.29/0.49               => ( X
% 0.29/0.49                  = ( setminus @ A @ ( setminus @ A @ X ) ) ) ) ) ) ) ) ).
% 0.29/0.49  
% 0.29/0.49  %------------------------------------------------------------------------------
% 0.29/0.49  ------------------------
% 1.70/1.43  ---- Embedded in THF ---
% 1.70/1.43  %%% This output was generated by embedproblem, version 1.9.5 (library version 1.9).
% 1.70/1.43  %%% Generated on Tue Feb 24 12:32:34 EST 2026
% 1.70/1.43  %%% using '$$dhol' embedding, version 1.3.0.
% 1.70/1.43  %%% Logic specification used:
% 1.70/1.43  %%% thf(spec, logic, $$dhol).
% 1.70/1.43  
% 1.70/1.43  % SZS output start ListOfTHF for /export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2DTF10587.p
% See solution above
% 1.70/1.43  ------------------------
% 1.70/1.44  ---- Cleaned THF ---
% 1.70/1.44  thf(in_type,type,
% 1.70/1.44      in: $i > $i > $o ).
% 1.70/1.44  
% 1.70/1.44  thf(powerset_type,type,
% 1.70/1.44      powerset: $i > $i ).
% 1.70/1.44  
% 1.70/1.44  thf(setminus_type,type,
% 1.70/1.44      setminus: $i > $i > $i ).
% 1.70/1.44  
% 1.70/1.44  thf(complementT_lem_type,type,
% 1.70/1.44      complementT_lem: $o ).
% 1.70/1.44  
% 1.70/1.44  thf(complementT_lem,definition,
% 1.70/1.44      ( complementT_lem
% 1.70/1.44      = ( ! [A: $i,X: $i] :
% 1.70/1.44            ( ( in @ X @ ( powerset @ A ) )
% 1.70/1.44           => ( in @ ( setminus @ A @ X ) @ ( powerset @ A ) ) ) ) ) ).
% 1.70/1.44  
% 1.70/1.44  thf(setextT_type,type,
% 1.70/1.44      setextT: $o ).
% 1.70/1.44  
% 1.70/1.44  thf(setextT,definition,
% 1.70/1.44      ( setextT
% 1.70/1.44      = ( ! [A: $i,X: $i] :
% 1.70/1.44            ( ( in @ X @ ( powerset @ A ) )
% 1.70/1.44           => ! [Y: $i] :
% 1.70/1.44                ( ( in @ Y @ ( powerset @ A ) )
% 1.70/1.44               => ( ! [Xx: $i] :
% 1.70/1.44                      ( ( in @ Xx @ A )
% 1.70/1.44                     => ( ( in @ Xx @ X )
% 1.70/1.44                       => ( in @ Xx @ Y ) ) )
% 1.70/1.44                 => ( ! [Xx: $i] :
% 1.70/1.44                        ( ( in @ Xx @ A )
% 1.70/1.44                       => ( ( in @ Xx @ Y )
% 1.70/1.44                         => ( in @ Xx @ X ) ) )
% 1.70/1.44                   => ( X = Y ) ) ) ) ) ) ) ).
% 1.70/1.44  
% 1.70/1.44  thf(doubleComplementI1_type,type,
% 1.70/1.44      doubleComplementI1: $o ).
% 1.70/1.44  
% 1.70/1.44  thf(doubleComplementI1,definition,
% 1.70/1.44      ( doubleComplementI1
% 1.70/1.44      = ( ! [A: $i,X: $i] :
% 1.70/1.44            ( ( in @ X @ ( powerset @ A ) )
% 1.70/1.44           => ! [Xx: $i] :
% 1.70/1.44                ( ( in @ Xx @ A )
% 1.70/1.44               => ( ( in @ Xx @ X )
% 1.70/1.44                 => ( in @ Xx @ ( setminus @ A @ ( setminus @ A @ X ) ) ) ) ) ) ) ) ).
% 1.70/1.44  
% 1.70/1.44  thf(doubleComplementE1_type,type,
% 1.70/1.44      doubleComplementE1: $o ).
% 1.70/1.44  
% 1.70/1.44  thf(doubleComplementE1,definition,
% 1.70/1.44      ( doubleComplementE1
% 1.70/1.44      = ( ! [A: $i,X: $i] :
% 1.70/1.44            ( ( in @ X @ ( powerset @ A ) )
% 1.70/1.44           => ! [Xx: $i] :
% 1.70/1.44                ( ( in @ Xx @ A )
% 1.70/1.44               => ( ( in @ Xx @ ( setminus @ A @ ( setminus @ A @ X ) ) )
% 1.70/1.44                 => ( in @ Xx @ X ) ) ) ) ) ) ).
% 1.70/1.44  
% 1.70/1.44  thf(doubleComplementEq,conjecture,
% 1.70/1.44      ( complementT_lem
% 1.70/1.44     => ( setextT
% 1.70/1.44       => ( doubleComplementI1
% 1.70/1.44         => ( doubleComplementE1
% 1.70/1.44           => ! [A: $i,X: $i] :
% 1.70/1.44                ( ( in @ X @ ( powerset @ A ) )
% 1.70/1.44               => ( X
% 1.70/1.44                  = ( setminus @ A @ ( setminus @ A @ X ) ) ) ) ) ) ) ) ).
% 1.70/1.44  ------------------------
% 1.70/1.46  % (10694)lrs+10_1:1_au=on:inj=on:i=2:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/2Mi)
% 1.70/1.46  % (10695)lrs+1002_1:128_aac=none:au=on:cnfonf=lazy_not_gen_be_off:sos=all:i=2:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/2Mi)
% 1.70/1.46  % (10692)lrs+10_1:1_c=on:cnfonf=conj_eager:fd=off:fe=off:kws=frequency:spb=intro:i=4:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/4Mi)
% 1.70/1.46  % (10696)lrs+1002_1:1_au=on:bd=off:e2e=on:sd=2:sos=on:ss=axioms:i=275:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/275Mi)
% 1.70/1.46  % (10693)dis+1010_1:1_au=on:cbe=off:chr=on:fsr=off:hfsq=on:nm=64:sos=theory:sp=weighted_frequency:i=27:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/27Mi)
% 1.70/1.46  % (10697)lrs+1004_1:128_cond=on:e2e=on:sp=weighted_frequency:i=18:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/18Mi)
% 1.70/1.46  % (10691)lrs+1002_1:8_bd=off:fd=off:hud=10:tnu=1:i=183:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/183Mi)
% 1.70/1.47  % (10694)Instruction limit reached!
% 1.70/1.47  % (10694)------------------------------
% 1.70/1.47  % (10694)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.70/1.47  % (10694)Termination reason: Unknown
% 1.70/1.47  % (10694)Termination phase: Property scanning
% 1.70/1.47  % (10695)Instruction limit reached!
% 1.70/1.47  % (10695)------------------------------
% 1.70/1.47  % (10695)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.70/1.47  % (10695)Termination reason: Unknown
% 1.70/1.47  % (10695)Termination phase: Property scanning
% 1.70/1.47  
% 1.70/1.47  % (10695)Memory used [KB]: 1023
% 1.70/1.47  % (10695)Time elapsed: 0.003 s
% 1.70/1.47  % (10695)Instructions burned: 3 (million)
% 1.70/1.47  % (10695)------------------------------
% 1.70/1.47  % (10695)------------------------------
% 1.70/1.47  
% 1.70/1.47  % (10694)Memory used [KB]: 1023
% 1.70/1.47  % (10694)Time elapsed: 0.003 s
% 1.70/1.47  % (10694)Instructions burned: 3 (million)
% 1.70/1.47  % (10694)------------------------------
% 1.70/1.47  % (10694)------------------------------
% 1.70/1.47  % (10692)Instruction limit reached!
% 1.70/1.47  % (10692)------------------------------
% 1.70/1.47  % (10692)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.70/1.47  % (10692)Termination reason: Unknown
% 1.70/1.47  % (10692)Termination phase: Saturation
% 1.70/1.47  
% 1.70/1.47  % (10692)Memory used [KB]: 1023
% 1.70/1.47  % (10692)Time elapsed: 0.004 s
% 1.70/1.47  % (10692)Instructions burned: 4 (million)
% 1.70/1.47  % (10692)------------------------------
% 1.70/1.47  % (10692)------------------------------
% 1.70/1.47  % (10697)Instruction limit reached!
% 1.70/1.47  % (10697)------------------------------
% 1.70/1.47  % (10697)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.70/1.47  % (10697)Termination reason: Unknown
% 1.70/1.47  % (10697)Termination phase: Saturation
% 1.70/1.47  
% 1.70/1.47  % (10697)Memory used [KB]: 5628
% 1.70/1.47  % (10697)Time elapsed: 0.012 s
% 1.70/1.47  % (10697)Instructions burned: 19 (million)
% 1.70/1.47  % (10697)------------------------------
% 1.70/1.47  % (10697)------------------------------
% 1.70/1.48  % (10693)Instruction limit reached!
% 1.70/1.48  % (10693)------------------------------
% 1.70/1.48  % (10693)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.70/1.48  % (10693)Termination reason: Unknown
% 1.70/1.48  % (10693)Termination phase: Saturation
% 1.70/1.48  
% 1.70/1.48  % (10693)Memory used [KB]: 5628
% 1.70/1.48  % (10693)Time elapsed: 0.016 s
% 1.70/1.48  % (10693)Instructions burned: 28 (million)
% 1.70/1.48  % (10693)------------------------------
% 1.70/1.48  % (10693)------------------------------
% 1.70/1.48  % (10698)lrs+10_1:1_bet=on:cnfonf=off:fd=off:hud=5:inj=on:i=3:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/3Mi)
% 1.70/1.48  % (10699)lrs+1002_1:1_cnfonf=lazy_not_be_gen:hud=14:prag=on:sp=weighted_frequency:tnu=1:i=37:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/37Mi)
% 1.70/1.48  % (10700)lrs+2_16:1_acc=model:au=on:bd=off:c=on:e2e=on:nm=2:sos=all:i=15:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/15Mi)
% 1.70/1.48  % (10698)Instruction limit reached!
% 1.70/1.48  % (10698)------------------------------
% 1.70/1.48  % (10698)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.70/1.48  % (10698)Termination reason: Unknown
% 1.70/1.48  % (10698)Termination phase: Saturation
% 1.70/1.48  
% 1.70/1.48  % (10698)Memory used [KB]: 1023
% 1.70/1.48  % (10698)Time elapsed: 0.004 s
% 1.70/1.48  % (10698)Instructions burned: 4 (million)
% 1.70/1.48  % (10698)------------------------------
% 1.70/1.48  % (10698)------------------------------
% 1.70/1.49  % (10700)Instruction limit reached!
% 1.70/1.49  % (10700)------------------------------
% 1.70/1.49  % (10700)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.70/1.49  % (10700)Termination reason: Unknown
% 1.70/1.49  % (10700)Termination phase: Saturation
% 1.70/1.49  
% 1.70/1.49  % (10700)Memory used [KB]: 5628
% 1.70/1.49  % (10700)Time elapsed: 0.009 s
% 1.70/1.49  % (10700)Instructions burned: 15 (million)
% 1.70/1.49  % (10700)------------------------------
% 1.70/1.49  % (10700)------------------------------
% 1.70/1.49  % (10701)dis+21_1:1_cbe=off:cnfonf=off:fs=off:fsr=off:hud=1:inj=on:i=3:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/3Mi)
% 1.70/1.49  % (10701)Instruction limit reached!
% 1.70/1.49  % (10701)------------------------------
% 1.70/1.49  % (10701)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.70/1.49  % (10701)Termination reason: Unknown
% 1.70/1.49  % (10701)Termination phase: Preprocessing 3
% 1.70/1.49  
% 1.70/1.49  % (10701)Memory used [KB]: 1023
% 1.70/1.49  % (10701)Time elapsed: 0.003 s
% 1.70/1.49  % (10701)Instructions burned: 3 (million)
% 1.70/1.49  % (10701)------------------------------
% 1.70/1.49  % (10701)------------------------------
% 1.70/1.49  % (10702)lrs+1002_1:1_aac=none:au=on:cnfonf=lazy_gen:plsq=on:plsqc=1:plsqr=4203469,65536:i=1041:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/1041Mi)
% 1.77/1.50  % (10699)Instruction limit reached!
% 1.77/1.50  % (10699)------------------------------
% 1.77/1.50  % (10699)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.77/1.50  % (10699)Termination reason: Unknown
% 1.77/1.50  % (10699)Termination phase: Saturation
% 1.77/1.50  
% 1.77/1.50  % (10699)Memory used [KB]: 5628
% 1.77/1.50  % (10699)Time elapsed: 0.019 s
% 1.77/1.50  % (10699)Instructions burned: 37 (million)
% 1.77/1.50  % (10699)------------------------------
% 1.77/1.50  % (10699)------------------------------
% 1.77/1.50  % (10703)lrs+10_1:1_av=off:chr=on:plsq=on:slsq=on:i=7:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/7Mi)
% 1.77/1.50  % (10703)Instruction limit reached!
% 1.77/1.50  % (10703)------------------------------
% 1.77/1.50  % (10703)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.77/1.50  % (10703)Termination reason: Unknown
% 1.77/1.50  % (10703)Termination phase: Saturation
% 1.77/1.50  
% 1.77/1.50  % (10703)Memory used [KB]: 1023
% 1.77/1.50  % (10703)Time elapsed: 0.005 s
% 1.77/1.50  % (10703)Instructions burned: 7 (million)
% 1.77/1.50  % (10703)------------------------------
% 1.77/1.50  % (10703)------------------------------
% 1.77/1.51  % (10704)lrs+10_1:1_acc=on:amm=sco:cs=on:tgt=full:i=16:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/16Mi)
% 1.77/1.51  % (10705)lrs+21_1:1_au=on:cnfonf=off:fd=preordered:fe=off:fsr=off:hud=11:inj=on:kws=precedence:s2pl=no:sp=weighted_frequency:tgt=full:i=3:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/3Mi)
% 1.77/1.51  % (10705)Instruction limit reached!
% 1.77/1.51  % (10705)------------------------------
% 1.77/1.51  % (10705)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.77/1.51  % (10705)Termination reason: Unknown
% 1.77/1.51  % (10705)Termination phase: Property scanning
% 1.77/1.51  
% 1.77/1.51  % (10705)Memory used [KB]: 1023
% 1.77/1.51  % (10705)Time elapsed: 0.003 s
% 1.77/1.51  % (10705)Instructions burned: 3 (million)
% 1.77/1.51  % (10705)------------------------------
% 1.77/1.51  % (10705)------------------------------
% 1.77/1.52  % (10706)lrs+2_1:1_apa=on:au=on:bd=preordered:cnfonf=off:cs=on:ixr=off:sos=on:i=3:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/3Mi)
% 1.77/1.52  % (10704)Instruction limit reached!
% 1.77/1.52  % (10704)------------------------------
% 1.77/1.52  % (10704)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.77/1.52  % (10704)Termination reason: Unknown
% 1.77/1.52  % (10704)Termination phase: Saturation
% 1.77/1.52  
% 1.77/1.52  % (10704)Memory used [KB]: 5884
% 1.77/1.52  % (10704)Time elapsed: 0.011 s
% 1.77/1.52  % (10704)Instructions burned: 17 (million)
% 1.77/1.52  % (10704)------------------------------
% 1.77/1.52  % (10704)------------------------------
% 1.77/1.52  % (10706)Instruction limit reached!
% 1.77/1.52  % (10706)------------------------------
% 1.77/1.52  % (10706)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.77/1.52  % (10706)Termination reason: Unknown
% 1.77/1.52  % (10706)Termination phase: Property scanning
% 1.77/1.52  
% 1.77/1.52  % (10706)Memory used [KB]: 1023
% 1.77/1.52  % (10706)Time elapsed: 0.003 s
% 1.77/1.52  % (10706)Instructions burned: 3 (million)
% 1.77/1.52  % (10706)------------------------------
% 1.77/1.52  % (10706)------------------------------
% 1.77/1.52  % (10707)lrs+10_1:1_cnfonf=off:cs=on:hud=3:prag=on:sup=off:i=7:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/7Mi)
% 1.77/1.52  % (10707)Refutation not found, incomplete strategy
% 1.77/1.52  % (10707)------------------------------
% 1.77/1.52  % (10707)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.77/1.52  % (10707)Termination reason: Refutation not found, incomplete strategy
% 1.77/1.52  
% 1.77/1.52  
% 1.77/1.52  % (10707)Memory used [KB]: 5500
% 1.77/1.52  % (10707)Time elapsed: 0.004 s
% 1.77/1.52  % (10707)Instructions burned: 5 (million)
% 1.77/1.52  % (10707)------------------------------
% 1.77/1.52  % (10707)------------------------------
% 1.77/1.53  % (10708)dis+1002_1:1_add=large:cnfonf=lazy_pi_sigma_gen:fe=off:prag=on:i=3:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/3Mi)
% 1.77/1.53  % (10708)Instruction limit reached!
% 1.77/1.53  % (10708)------------------------------
% 1.77/1.53  % (10708)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.77/1.53  % (10708)Termination reason: Unknown
% 1.77/1.53  % (10708)Termination phase: Function definition elimination
% 1.77/1.53  
% 1.77/1.53  % (10708)Memory used [KB]: 1023
% 1.77/1.53  % (10708)Time elapsed: 0.003 s
% 1.77/1.53  % (10708)Instructions burned: 4 (million)
% 1.77/1.53  % (10708)------------------------------
% 1.77/1.53  % (10708)------------------------------
% 1.77/1.53  % (10702)First to succeed.
% 1.77/1.53  % (10709)dis+1004_1:1_cha=on:cs=on:fe=off:hud=1:i=4:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/4Mi)
% 1.77/1.53  % (10710)lrs+1002_1:1_anc=all_dependent:au=on:cbe=off:fde=unused:ntd=on:i=18:si=on:rtra=on_0 on DTF2THF_10587 for (2999ds/18Mi)
% 1.77/1.53  % (10709)Instruction limit reached!
% 1.77/1.53  % (10709)------------------------------
% 1.77/1.53  % (10709)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.77/1.53  % (10709)Termination reason: Unknown
% 1.77/1.53  % (10709)Termination phase: Saturation
% 1.77/1.53  
% 1.77/1.53  % (10709)Memory used [KB]: 5500
% 1.77/1.53  % (10709)Time elapsed: 0.004 s
% 1.77/1.53  % (10709)Instructions burned: 5 (million)
% 1.77/1.53  % (10709)------------------------------
% 1.77/1.53  % (10709)------------------------------
% 1.77/1.54  % (10702)Refutation found. Thanks to Tanya!
% 1.77/1.54  % SZS status Theorem for DTF2THF_10587
% 1.77/1.54  % SZS output start Proof for DTF2THF_10587
% 1.77/1.54  thf(func_def_0, type, in: $i > $i > $o).
% 1.77/1.54  thf(func_def_1, type, powerset: $i > $i).
% 1.77/1.54  thf(func_def_2, type, setminus: $i > $i > $i).
% 1.77/1.54  thf(func_def_20, type, ph1: !>[X0: $tType]:(X0)).
% 1.77/1.54  thf(f221,plain,(
% 1.77/1.54    $false),
% 1.77/1.54    inference(subsumption_resolution,[status(thm)],[f216,f68])).
% 1.77/1.54  thf(f68,plain,(
% 1.77/1.54    ((setminus @ sK2 @ (setminus @ sK2 @ sK3)) != sK3)),
% 1.77/1.54    inference(equality_proxy_clausification,[status(thm)],[f56])).
% 1.77/1.54  thf(f56,plain,(
% 1.77/1.54    ($false = ((setminus @ sK2 @ (setminus @ sK2 @ sK3)) = sK3))),
% 1.77/1.54    inference(binary_proxy_clausification,[status(thm)],[f55])).
% 1.77/1.54  thf(f55,plain,(
% 1.77/1.54    ($false = ((in @ sK3 @ (powerset @ sK2)) => ((setminus @ sK2 @ (setminus @ sK2 @ sK3)) = sK3)))),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f54])).
% 1.77/1.54  thf(f54,plain,(
% 1.77/1.54    ($false = ((^[Y0 : $i]: ((in @ Y0 @ (powerset @ sK2)) => ((setminus @ sK2 @ (setminus @ sK2 @ Y0)) = Y0))) @ sK3))),
% 1.77/1.54    inference(sigma_clausification,[status(thm)],[f53])).
% 1.77/1.54  thf(f53,plain,(
% 1.77/1.54    ($false = (!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ (powerset @ sK2)) => ((setminus @ sK2 @ (setminus @ sK2 @ Y0)) = Y0)))))),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f52])).
% 1.77/1.54  thf(f52,plain,(
% 1.77/1.54    ($false = ((^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1))))) @ sK2))),
% 1.77/1.54    inference(sigma_clausification,[status(thm)],[f51])).
% 1.77/1.54  thf(f51,plain,(
% 1.77/1.54    ($false = (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1)))))))),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f50])).
% 1.77/1.54  thf(f50,plain,(
% 1.77/1.54    ($false = ($true => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1))))))))),
% 1.77/1.54    inference(backward_demodulation,[status(thm)],[f45,f49])).
% 1.77/1.54  thf(f49,plain,(
% 1.77/1.54    ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))) = $true)),
% 1.77/1.54    inference(binary_proxy_clausification,[status(thm)],[f45])).
% 1.77/1.54  thf(f45,plain,(
% 1.77/1.54    ($false = ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))) => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1))))))))),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f44])).
% 1.77/1.54  thf(f44,plain,(
% 1.77/1.54    ($false = ($true => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))) => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1)))))))))),
% 1.77/1.54    inference(backward_demodulation,[status(thm)],[f41,f43])).
% 1.77/1.54  thf(f43,plain,(
% 1.77/1.54    ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y0 @ (powerset @ Y1)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y1) => ((in @ Y2 @ Y0) => (in @ Y2 @ (setminus @ Y1 @ (setminus @ Y1 @ Y0)))))))))))) = $true)),
% 1.77/1.54    inference(binary_proxy_clausification,[status(thm)],[f41])).
% 1.77/1.54  thf(f41,plain,(
% 1.77/1.54    ($false = ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y0 @ (powerset @ Y1)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y1) => ((in @ Y2 @ Y0) => (in @ Y2 @ (setminus @ Y1 @ (setminus @ Y1 @ Y0)))))))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))) => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1)))))))))),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f40])).
% 1.77/1.54  thf(f40,plain,(
% 1.77/1.54    ($false = ($true => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y0 @ (powerset @ Y1)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y1) => ((in @ Y2 @ Y0) => (in @ Y2 @ (setminus @ Y1 @ (setminus @ Y1 @ Y0)))))))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))) => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1))))))))))),
% 1.77/1.54    inference(backward_demodulation,[status(thm)],[f27,f39])).
% 1.77/1.54  thf(f39,plain,(
% 1.77/1.54    ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ (powerset @ Y0)) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y1) => (in @ Y3 @ Y2))))) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y2) => (in @ Y3 @ Y1))))) => (Y1 = Y2))))))))))) = $true)),
% 1.77/1.54    inference(binary_proxy_clausification,[status(thm)],[f27])).
% 1.77/1.54  thf(f27,plain,(
% 1.77/1.54    ($false = ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ (powerset @ Y0)) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y1) => (in @ Y3 @ Y2))))) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y2) => (in @ Y3 @ Y1))))) => (Y1 = Y2))))))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y0 @ (powerset @ Y1)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y1) => ((in @ Y2 @ Y0) => (in @ Y2 @ (setminus @ Y1 @ (setminus @ Y1 @ Y0)))))))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))) => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1))))))))))),
% 1.77/1.54    inference(binary_proxy_clausification,[status(thm)],[f24])).
% 1.77/1.54  thf(f24,plain,(
% 1.77/1.54    ($false = ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (in @ (setminus @ Y0 @ Y1) @ (powerset @ Y0))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ (powerset @ Y0)) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y1) => (in @ Y3 @ Y2))))) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y2) => (in @ Y3 @ Y1))))) => (Y1 = Y2))))))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y0 @ (powerset @ Y1)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y1) => ((in @ Y2 @ Y0) => (in @ Y2 @ (setminus @ Y1 @ (setminus @ Y1 @ Y0)))))))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))) => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1)))))))))))),
% 1.77/1.54    inference(not_proxy_clausification,[status(thm)],[f23])).
% 1.77/1.54  thf(f23,plain,(
% 1.77/1.54    ((~ ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (in @ (setminus @ Y0 @ Y1) @ (powerset @ Y0))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ (powerset @ Y0)) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y1) => (in @ Y3 @ Y2))))) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y2) => (in @ Y3 @ Y1))))) => (Y1 = Y2))))))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y0 @ (powerset @ Y1)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y1) => ((in @ Y2 @ Y0) => (in @ Y2 @ (setminus @ Y1 @ (setminus @ Y1 @ Y0)))))))))))) => ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))) => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1))))))))))) = $true)),
% 1.77/1.54    inference(definition_unfolding,[status(thm)],[f18,f20,f22,f19,f21])).
% 1.77/1.54  thf(f21,plain,(
% 1.77/1.54    (doubleComplementE1 = (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))))),
% 1.77/1.54    inference(cnf_transformation,[status(thm)],[f9])).
% 1.77/1.54  thf(f9,plain,(
% 1.77/1.54    (doubleComplementE1 = (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1)))))))))))),
% 1.77/1.54    inference(fool_elimination,[status(thm)],[f8])).
% 1.77/1.54  thf(f8,plain,(
% 1.77/1.54    (! [X0 : $i,X1 : $i] : ((in @ X0 @ (powerset @ X1)) => ! [X2 : $i] : ((in @ X2 @ X1) => ((in @ X2 @ (setminus @ X1 @ (setminus @ X1 @ X0))) => (in @ X2 @ X0)))) = doubleComplementE1)),
% 1.77/1.54    inference(rectify,[status(thm)],[f4])).
% 1.77/1.54  thf(f4,axiom,(
% 1.77/1.54    (! [X1 : $i,X0 : $i] : ((in @ X1 @ (powerset @ X0)) => ! [X3 : $i] : ((in @ X3 @ X0) => ((in @ X3 @ (setminus @ X0 @ (setminus @ X0 @ X1))) => (in @ X3 @ X1)))) = doubleComplementE1)),
% 1.77/1.54    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',doubleComplementE1)).
% 1.77/1.54  thf(f19,plain,(
% 1.77/1.54    (doubleComplementI1 = (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y0 @ (powerset @ Y1)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y1) => ((in @ Y2 @ Y0) => (in @ Y2 @ (setminus @ Y1 @ (setminus @ Y1 @ Y0)))))))))))))),
% 1.77/1.54    inference(cnf_transformation,[status(thm)],[f15])).
% 1.77/1.54  thf(f15,plain,(
% 1.77/1.54    (doubleComplementI1 = (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y0 @ (powerset @ Y1)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y1) => ((in @ Y2 @ Y0) => (in @ Y2 @ (setminus @ Y1 @ (setminus @ Y1 @ Y0)))))))))))))),
% 1.77/1.54    inference(fool_elimination,[status(thm)],[f14])).
% 1.77/1.54  thf(f14,plain,(
% 1.77/1.54    (! [X0 : $i,X1 : $i] : ((in @ X1 @ (powerset @ X0)) => ! [X2 : $i] : ((in @ X2 @ X0) => ((in @ X2 @ X1) => (in @ X2 @ (setminus @ X0 @ (setminus @ X0 @ X1)))))) = doubleComplementI1)),
% 1.77/1.54    inference(rectify,[status(thm)],[f3])).
% 1.77/1.54  thf(f3,axiom,(
% 1.77/1.54    (! [X0 : $i,X1 : $i] : ((in @ X1 @ (powerset @ X0)) => ! [X3 : $i] : ((in @ X3 @ X0) => ((in @ X3 @ X1) => (in @ X3 @ (setminus @ X0 @ (setminus @ X0 @ X1)))))) = doubleComplementI1)),
% 1.77/1.54    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',doubleComplementI1)).
% 1.77/1.54  thf(f22,plain,(
% 1.77/1.54    (setextT = (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ (powerset @ Y0)) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y1) => (in @ Y3 @ Y2))))) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y2) => (in @ Y3 @ Y1))))) => (Y1 = Y2))))))))))))),
% 1.77/1.54    inference(cnf_transformation,[status(thm)],[f17])).
% 1.77/1.54  thf(f17,plain,(
% 1.77/1.54    (setextT = (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ (powerset @ Y0)) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y1) => (in @ Y3 @ Y2))))) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y2) => (in @ Y3 @ Y1))))) => (Y1 = Y2))))))))))))),
% 1.77/1.54    inference(fool_elimination,[status(thm)],[f16])).
% 1.77/1.54  thf(f16,plain,(
% 1.77/1.54    (setextT = ! [X0 : $i,X1 : $i] : ((in @ X0 @ (powerset @ X1)) => ! [X2 : $i] : ((in @ X2 @ (powerset @ X1)) => (! [X3 : $i] : ((in @ X3 @ X1) => ((in @ X3 @ X0) => (in @ X3 @ X2))) => (! [X4 : $i] : ((in @ X4 @ X1) => ((in @ X4 @ X2) => (in @ X4 @ X0))) => (X0 = X2))))))),
% 1.77/1.54    inference(rectify,[status(thm)],[f2])).
% 1.77/1.54  thf(f2,axiom,(
% 1.77/1.54    (setextT = ! [X1 : $i,X0 : $i] : ((in @ X1 @ (powerset @ X0)) => ! [X2 : $i] : ((in @ X2 @ (powerset @ X0)) => (! [X3 : $i] : ((in @ X3 @ X0) => ((in @ X3 @ X1) => (in @ X3 @ X2))) => (! [X3 : $i] : ((in @ X3 @ X0) => ((in @ X3 @ X2) => (in @ X3 @ X1))) => (X1 = X2))))))),
% 1.77/1.54    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',setextT)).
% 1.77/1.54  thf(f20,plain,(
% 1.77/1.54    (complementT_lem = (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (in @ (setminus @ Y0 @ Y1) @ (powerset @ Y0))))))))),
% 1.77/1.54    inference(cnf_transformation,[status(thm)],[f11])).
% 1.77/1.54  thf(f11,plain,(
% 1.77/1.54    (complementT_lem = (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (in @ (setminus @ Y0 @ Y1) @ (powerset @ Y0))))))))),
% 1.77/1.54    inference(fool_elimination,[status(thm)],[f10])).
% 1.77/1.54  thf(f10,plain,(
% 1.77/1.54    (! [X0 : $i,X1 : $i] : ((in @ X0 @ (powerset @ X1)) => (in @ (setminus @ X1 @ X0) @ (powerset @ X1))) = complementT_lem)),
% 1.77/1.54    inference(rectify,[status(thm)],[f1])).
% 1.77/1.54  thf(f1,axiom,(
% 1.77/1.54    (! [X1 : $i,X0 : $i] : ((in @ X1 @ (powerset @ X0)) => (in @ (setminus @ X0 @ X1) @ (powerset @ X0))) = complementT_lem)),
% 1.77/1.54    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',complementT_lem)).
% 1.77/1.54  thf(f18,plain,(
% 1.77/1.54    ((~ (complementT_lem => (setextT => (doubleComplementI1 => (doubleComplementE1 => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1))))))))))) = $true)),
% 1.77/1.54    inference(cnf_transformation,[status(thm)],[f13])).
% 1.77/1.54  thf(f13,plain,(
% 1.77/1.54    ((~ (complementT_lem => (setextT => (doubleComplementI1 => (doubleComplementE1 => (!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => ((setminus @ Y0 @ (setminus @ Y0 @ Y1)) = Y1))))))))))) = $true)),
% 1.77/1.54    inference(fool_elimination,[status(thm)],[f12])).
% 1.77/1.54  thf(f12,plain,(
% 1.77/1.54    ~(complementT_lem => (setextT => (doubleComplementI1 => (doubleComplementE1 => ! [X0 : $i,X1 : $i] : ((in @ X0 @ (powerset @ X1)) => ((setminus @ X1 @ (setminus @ X1 @ X0)) = X0))))))),
% 1.77/1.54    inference(rectify,[status(thm)],[f6])).
% 1.77/1.54  thf(f6,negated_conjecture,(
% 1.77/1.54    ~(complementT_lem => (setextT => (doubleComplementI1 => (doubleComplementE1 => ! [X1 : $i,X0 : $i] : ((in @ X1 @ (powerset @ X0)) => ((setminus @ X0 @ (setminus @ X0 @ X1)) = X1))))))),
% 1.77/1.54    inference(negated_conjecture,[status(cth)],[f5])).
% 1.77/1.54  thf(f5,conjecture,(
% 1.77/1.54    complementT_lem => (setextT => (doubleComplementI1 => (doubleComplementE1 => ! [X1 : $i,X0 : $i] : ((in @ X1 @ (powerset @ X0)) => ((setminus @ X0 @ (setminus @ X0 @ X1)) = X1)))))),
% 1.77/1.54    file('/export/starexec/sandbox/tmp/tmp.g1sG0tvbLl/DTF2THF_10587.p',doubleComplementEq)).
% 1.77/1.54  thf(f216,plain,(
% 1.77/1.54    ((setminus @ sK2 @ (setminus @ sK2 @ sK3)) = sK3)),
% 1.77/1.54    inference(equality_proxy_clausification,[status(thm)],[f207])).
% 1.77/1.54  thf(f207,plain,(
% 1.77/1.54    ((sK3 = (setminus @ sK2 @ (setminus @ sK2 @ sK3))) = $true)),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f206])).
% 1.77/1.54  thf(f206,plain,(
% 1.77/1.54    ($true = ($true => (sK3 = (setminus @ sK2 @ (setminus @ sK2 @ sK3)))))),
% 1.77/1.54    inference(forward_demodulation,[status(thm)],[f205,f115])).
% 1.77/1.54  thf(f115,plain,(
% 1.77/1.54    ((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3))) => (in @ Y0 @ sK3))))) = $true)),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f105])).
% 1.77/1.54  thf(f105,plain,(
% 1.77/1.54    (($true => (!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3))) => (in @ Y0 @ sK3)))))) = $true)),
% 1.77/1.54    inference(superposition,[status(thm)],[f97,f57])).
% 1.77/1.54  thf(f57,plain,(
% 1.77/1.54    ((in @ sK3 @ (powerset @ sK2)) = $true)),
% 1.77/1.54    inference(binary_proxy_clausification,[status(thm)],[f55])).
% 1.77/1.54  thf(f97,plain,(
% 1.77/1.54    ( ! [X2 : $i,X1 : $i] : (($true = ((in @ X2 @ (powerset @ X1)) => (!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ X1) => ((in @ Y0 @ (setminus @ X1 @ (setminus @ X1 @ X2))) => (in @ Y0 @ X2)))))))) )),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f96])).
% 1.77/1.54  thf(f96,plain,(
% 1.77/1.54    ( ! [X2 : $i,X1 : $i] : ((((^[Y0 : $i]: ((in @ Y0 @ (powerset @ X1)) => (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ X1) => ((in @ Y1 @ (setminus @ X1 @ (setminus @ X1 @ Y0))) => (in @ Y1 @ Y0))))))) @ X2) = $true)) )),
% 1.77/1.54    inference(pi_clausification,[status(thm)],[f89])).
% 1.77/1.54  thf(f89,plain,(
% 1.77/1.54    ( ! [X1 : $i] : (((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ (powerset @ X1)) => (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ X1) => ((in @ Y1 @ (setminus @ X1 @ (setminus @ X1 @ Y0))) => (in @ Y1 @ Y0)))))))) = $true)) )),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f88])).
% 1.77/1.54  thf(f88,plain,(
% 1.77/1.54    ( ! [X1 : $i] : ((((^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y0) => ((in @ Y2 @ (setminus @ Y0 @ (setminus @ Y0 @ Y1))) => (in @ Y2 @ Y1))))))))) @ X1) = $true)) )),
% 1.77/1.54    inference(pi_clausification,[status(thm)],[f49])).
% 1.77/1.54  thf(f205,plain,(
% 1.77/1.54    ($true = ((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3))) => (in @ Y0 @ sK3))))) => (sK3 = (setminus @ sK2 @ (setminus @ sK2 @ sK3)))))),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f204])).
% 1.77/1.54  thf(f204,plain,(
% 1.77/1.54    (($true => ((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3))) => (in @ Y0 @ sK3))))) => (sK3 = (setminus @ sK2 @ (setminus @ sK2 @ sK3))))) = $true)),
% 1.77/1.54    inference(forward_demodulation,[status(thm)],[f203,f80])).
% 1.77/1.54  thf(f80,plain,(
% 1.77/1.54    ((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ sK3) => (in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3))))))) = $true)),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f76])).
% 1.77/1.54  thf(f76,plain,(
% 1.77/1.54    (($true => (!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ sK3) => (in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3)))))))) = $true)),
% 1.77/1.54    inference(superposition,[status(thm)],[f70,f57])).
% 1.77/1.54  thf(f70,plain,(
% 1.77/1.54    ( ! [X2 : $i,X1 : $i] : ((((in @ X1 @ (powerset @ X2)) => (!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ X2) => ((in @ Y0 @ X1) => (in @ Y0 @ (setminus @ X2 @ (setminus @ X2 @ X1)))))))) = $true)) )),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f69])).
% 1.77/1.54  thf(f69,plain,(
% 1.77/1.54    ( ! [X2 : $i,X1 : $i] : ((((^[Y0 : $i]: ((in @ X1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ Y0) => ((in @ Y1 @ X1) => (in @ Y1 @ (setminus @ Y0 @ (setminus @ Y0 @ X1))))))))) @ X2) = $true)) )),
% 1.77/1.54    inference(pi_clausification,[status(thm)],[f47])).
% 1.77/1.54  thf(f47,plain,(
% 1.77/1.54    ( ! [X1 : $i] : (((!! @ $i @ (^[Y0 : $i]: ((in @ X1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ Y0) => ((in @ Y1 @ X1) => (in @ Y1 @ (setminus @ Y0 @ (setminus @ Y0 @ X1)))))))))) = $true)) )),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f46])).
% 1.77/1.54  thf(f46,plain,(
% 1.77/1.54    ( ! [X1 : $i] : ((((^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y0 @ (powerset @ Y1)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ Y1) => ((in @ Y2 @ Y0) => (in @ Y2 @ (setminus @ Y1 @ (setminus @ Y1 @ Y0))))))))))) @ X1) = $true)) )),
% 1.77/1.54    inference(pi_clausification,[status(thm)],[f43])).
% 1.77/1.54  thf(f203,plain,(
% 1.77/1.54    (((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ sK3) => (in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3))))))) => ((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3))) => (in @ Y0 @ sK3))))) => (sK3 = (setminus @ sK2 @ (setminus @ sK2 @ sK3))))) = $true)),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f183])).
% 1.77/1.54  thf(f183,plain,(
% 1.77/1.54    (($true => ((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ sK3) => (in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3))))))) => ((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ (setminus @ sK2 @ (setminus @ sK2 @ sK3))) => (in @ Y0 @ sK3))))) => (sK3 = (setminus @ sK2 @ (setminus @ sK2 @ sK3)))))) = $true)),
% 1.77/1.54    inference(superposition,[status(thm)],[f166,f67])).
% 1.77/1.54  thf(f67,plain,(
% 1.77/1.54    ((in @ (setminus @ sK2 @ (setminus @ sK2 @ sK3)) @ (powerset @ sK2)) = $true)),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f65])).
% 1.77/1.54  thf(f65,plain,(
% 1.77/1.54    ($true = ($true => (in @ (setminus @ sK2 @ (setminus @ sK2 @ sK3)) @ (powerset @ sK2))))),
% 1.77/1.54    inference(superposition,[status(thm)],[f36,f63])).
% 1.77/1.54  thf(f63,plain,(
% 1.77/1.54    ((in @ (setminus @ sK2 @ sK3) @ (powerset @ sK2)) = $true)),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f62])).
% 1.77/1.54  thf(f62,plain,(
% 1.77/1.54    (($true => (in @ (setminus @ sK2 @ sK3) @ (powerset @ sK2))) = $true)),
% 1.77/1.54    inference(superposition,[status(thm)],[f36,f57])).
% 1.77/1.54  thf(f36,plain,(
% 1.77/1.54    ( ! [X2 : $i,X1 : $i] : (($true = ((in @ X2 @ (powerset @ X1)) => (in @ (setminus @ X1 @ X2) @ (powerset @ X1))))) )),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f35])).
% 1.77/1.54  thf(f35,plain,(
% 1.77/1.54    ( ! [X2 : $i,X1 : $i] : ((((^[Y0 : $i]: ((in @ Y0 @ (powerset @ X1)) => (in @ (setminus @ X1 @ Y0) @ (powerset @ X1)))) @ X2) = $true)) )),
% 1.77/1.54    inference(pi_clausification,[status(thm)],[f34])).
% 1.77/1.54  thf(f34,plain,(
% 1.77/1.54    ( ! [X1 : $i] : (((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ (powerset @ X1)) => (in @ (setminus @ X1 @ Y0) @ (powerset @ X1))))) = $true)) )),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f33])).
% 1.77/1.54  thf(f33,plain,(
% 1.77/1.54    ( ! [X1 : $i] : ((((^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (in @ (setminus @ Y0 @ Y1) @ (powerset @ Y0)))))) @ X1) = $true)) )),
% 1.77/1.54    inference(pi_clausification,[status(thm)],[f28])).
% 1.77/1.54  thf(f28,plain,(
% 1.77/1.54    ((!! @ $i @ (^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (in @ (setminus @ Y0 @ Y1) @ (powerset @ Y0))))))) = $true)),
% 1.77/1.54    inference(binary_proxy_clausification,[status(thm)],[f24])).
% 1.77/1.54  thf(f166,plain,(
% 1.77/1.54    ( ! [X1 : $i] : ((((in @ X1 @ (powerset @ sK2)) => ((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ sK3) => (in @ Y0 @ X1))))) => ((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ sK2) => ((in @ Y0 @ X1) => (in @ Y0 @ sK3))))) => (sK3 = X1)))) = $true)) )),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f164])).
% 1.77/1.54  thf(f164,plain,(
% 1.77/1.54    ( ! [X1 : $i] : ((((^[Y0 : $i]: ((in @ Y0 @ (powerset @ sK2)) => ((!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ sK2) => ((in @ Y1 @ sK3) => (in @ Y1 @ Y0))))) => ((!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ sK2) => ((in @ Y1 @ Y0) => (in @ Y1 @ sK3))))) => (sK3 = Y0))))) @ X1) = $true)) )),
% 1.77/1.54    inference(pi_clausification,[status(thm)],[f143])).
% 1.77/1.54  thf(f143,plain,(
% 1.77/1.54    ($true = (!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ (powerset @ sK2)) => ((!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ sK2) => ((in @ Y1 @ sK3) => (in @ Y1 @ Y0))))) => ((!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ sK2) => ((in @ Y1 @ Y0) => (in @ Y1 @ sK3))))) => (sK3 = Y0)))))))),
% 1.77/1.54    inference(boolean_simplification,[status(thm)],[f135])).
% 1.77/1.54  thf(f135,plain,(
% 1.77/1.54    (($true => (!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ (powerset @ sK2)) => ((!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ sK2) => ((in @ Y1 @ sK3) => (in @ Y1 @ Y0))))) => ((!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ sK2) => ((in @ Y1 @ Y0) => (in @ Y1 @ sK3))))) => (sK3 = Y0))))))) = $true)),
% 1.77/1.54    inference(superposition,[status(thm)],[f132,f57])).
% 1.77/1.54  thf(f132,plain,(
% 1.77/1.54    ( ! [X2 : $i,X1 : $i] : ((((in @ X2 @ (powerset @ X1)) => (!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ (powerset @ X1)) => ((!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ X1) => ((in @ Y1 @ X2) => (in @ Y1 @ Y0))))) => ((!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ X1) => ((in @ Y1 @ Y0) => (in @ Y1 @ X2))))) => (X2 = Y0))))))) = $true)) )),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f131])).
% 1.77/1.54  thf(f131,plain,(
% 1.77/1.54    ( ! [X2 : $i,X1 : $i] : ((((^[Y0 : $i]: ((in @ Y0 @ (powerset @ X1)) => (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ X1)) => ((!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ X1) => ((in @ Y2 @ Y0) => (in @ Y2 @ Y1))))) => ((!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ X1) => ((in @ Y2 @ Y1) => (in @ Y2 @ Y0))))) => (Y0 = Y1)))))))) @ X2) = $true)) )),
% 1.77/1.54    inference(pi_clausification,[status(thm)],[f126])).
% 1.77/1.54  thf(f126,plain,(
% 1.77/1.54    ( ! [X1 : $i] : (((!! @ $i @ (^[Y0 : $i]: ((in @ Y0 @ (powerset @ X1)) => (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ X1)) => ((!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ X1) => ((in @ Y2 @ Y0) => (in @ Y2 @ Y1))))) => ((!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ X1) => ((in @ Y2 @ Y1) => (in @ Y2 @ Y0))))) => (Y0 = Y1))))))))) = $true)) )),
% 1.77/1.54    inference(beta_eta_normalization,[status(thm)],[f125])).
% 1.77/1.54  thf(f125,plain,(
% 1.77/1.54    ( ! [X1 : $i] : ((((^[Y0 : $i]: (!! @ $i @ (^[Y1 : $i]: ((in @ Y1 @ (powerset @ Y0)) => (!! @ $i @ (^[Y2 : $i]: ((in @ Y2 @ (powerset @ Y0)) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y1) => (in @ Y3 @ Y2))))) => ((!! @ $i @ (^[Y3 : $i]: ((in @ Y3 @ Y0) => ((in @ Y3 @ Y2) => (in @ Y3 @ Y1))))) => (Y1 = Y2)))))))))) @ X1) = $true)) )),
% 1.77/1.54    inference(pi_clausification,[status(thm)],[f39])).
% 1.77/1.54  % SZS output end Proof for DTF2THF_10587
% 1.77/1.54  % (10702)------------------------------
% 1.77/1.54  % (10702)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.77/1.54  % (10702)Termination reason: Refutation
% 1.77/1.54  
% 1.77/1.54  % (10702)Memory used [KB]: 5884
% 1.77/1.54  % (10702)Time elapsed: 0.042 s
% 1.77/1.54  % (10702)Instructions burned: 73 (million)
% 1.77/1.54  % (10702)------------------------------
% 1.77/1.54  % (10702)------------------------------
% 1.77/1.54  % (10690)Success in time 0.078 s
%------------------------------------------------------------------------------