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DT2H2X---1.9.5.THM-Ref.s

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%------------------------------------------------------------------------------
% File     : DT2H2X---1.9.5
% Problem  : SEU786^2 : 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 : n017.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 09:37:11 AM UTC 2026

% Result   : Theorem 0.25s 1.34s
% Output   : Refutation 0.25s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   14
%            Number of leaves      :    7
% Syntax   : Number of formulae    :   31 (   8 unt;   0 typ;   0 def)
%            Number of atoms       :  565 ( 141 equ;   0 cnn)
%            Maximal formula atoms :   14 (  18 avg)
%            Number of connectives :  658 (  51   ~;  34   |;  70   &; 468   @)
%                                         (   3 <=>;  32  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   18 (   7 avg)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :    0 (   0   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :   16 (  13 usr;  11 con; 0-2 aty)
%            Number of variables   :   89 (   0   ^;  53   !;  36   ?;  89   :)

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

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

thf(func_def_4,type,
    kpair: $i > $i > $i ).

thf(func_def_5,type,
    breln1: $i > $i > $o ).

thf(f42,plain,
    $false,
    inference(subsumption_resolution,[status(thm)],[f41,f33]) ).

thf(f33,plain,
    ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK5 )
   != $true ),
    inference(cnf_transformation,[status(thm)],[f21]) ).

thf(f21,plain,
    ( ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK5 )
     != $true )
    & ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK3 )
     != $true )
    & ( ( in @ ( kpair @ sK6 @ sK7 ) @ ( binunion @ sK3 @ sK5 ) )
      = $true )
    & ( ( in @ sK7 @ sK4 )
      = $true )
    & ( ( in @ sK6 @ sK4 )
      = $true )
    & ( ( breln1 @ sK4 @ sK5 )
      = $true )
    & ( ( breln1 @ sK4 @ sK3 )
      = $true )
    & ( binunionE = $true ) ),
    inference(skolemisation,[status(esa),new_symbols(skolem,[sK3,sK4,sK5,sK6,sK7])],[f10,f20,f19,f18,f17]) ).

thf(f17,plain,
    ( ? [X0: $i,X1: $i] :
        ( ? [X2: $i] :
            ( ? [X3: $i] :
                ( ? [X4: $i] :
                    ( ( ( in @ ( kpair @ X3 @ X4 ) @ X2 )
                     != $true )
                    & ( ( in @ ( kpair @ X3 @ X4 ) @ X0 )
                     != $true )
                    & ( ( in @ ( kpair @ X3 @ X4 ) @ ( binunion @ X0 @ X2 ) )
                      = $true )
                    & ( ( in @ X4 @ X1 )
                      = $true ) )
                & ( $true
                  = ( in @ X3 @ X1 ) ) )
            & ( ( breln1 @ X1 @ X2 )
              = $true ) )
        & ( ( breln1 @ X1 @ X0 )
          = $true ) )
   => ( ? [X2: $i] :
          ( ? [X3: $i] :
              ( ? [X4: $i] :
                  ( ( ( in @ ( kpair @ X3 @ X4 ) @ X2 )
                   != $true )
                  & ( ( in @ ( kpair @ X3 @ X4 ) @ sK3 )
                   != $true )
                  & ( ( in @ ( kpair @ X3 @ X4 ) @ ( binunion @ sK3 @ X2 ) )
                    = $true )
                  & ( ( in @ X4 @ sK4 )
                    = $true ) )
              & ( ( in @ X3 @ sK4 )
                = $true ) )
          & ( ( breln1 @ sK4 @ X2 )
            = $true ) )
      & ( ( breln1 @ sK4 @ sK3 )
        = $true ) ) ),
    introduced(definition,[],[choice_axiom]) ).

thf(f18,plain,
    ( ? [X2: $i] :
        ( ? [X3: $i] :
            ( ? [X4: $i] :
                ( ( ( in @ ( kpair @ X3 @ X4 ) @ X2 )
                 != $true )
                & ( ( in @ ( kpair @ X3 @ X4 ) @ sK3 )
                 != $true )
                & ( ( in @ ( kpair @ X3 @ X4 ) @ ( binunion @ sK3 @ X2 ) )
                  = $true )
                & ( ( in @ X4 @ sK4 )
                  = $true ) )
            & ( ( in @ X3 @ sK4 )
              = $true ) )
        & ( ( breln1 @ sK4 @ X2 )
          = $true ) )
   => ( ? [X3: $i] :
          ( ? [X4: $i] :
              ( ( ( in @ ( kpair @ X3 @ X4 ) @ sK5 )
               != $true )
              & ( ( in @ ( kpair @ X3 @ X4 ) @ sK3 )
               != $true )
              & ( ( in @ ( kpair @ X3 @ X4 ) @ ( binunion @ sK3 @ sK5 ) )
                = $true )
              & ( ( in @ X4 @ sK4 )
                = $true ) )
          & ( ( in @ X3 @ sK4 )
            = $true ) )
      & ( ( breln1 @ sK4 @ sK5 )
        = $true ) ) ),
    introduced(definition,[],[choice_axiom]) ).

thf(f19,plain,
    ( ? [X3: $i] :
        ( ? [X4: $i] :
            ( ( ( in @ ( kpair @ X3 @ X4 ) @ sK5 )
             != $true )
            & ( ( in @ ( kpair @ X3 @ X4 ) @ sK3 )
             != $true )
            & ( ( in @ ( kpair @ X3 @ X4 ) @ ( binunion @ sK3 @ sK5 ) )
              = $true )
            & ( ( in @ X4 @ sK4 )
              = $true ) )
        & ( ( in @ X3 @ sK4 )
          = $true ) )
   => ( ? [X4: $i] :
          ( ( ( in @ ( kpair @ sK6 @ X4 ) @ sK5 )
           != $true )
          & ( ( in @ ( kpair @ sK6 @ X4 ) @ sK3 )
           != $true )
          & ( ( in @ ( kpair @ sK6 @ X4 ) @ ( binunion @ sK3 @ sK5 ) )
            = $true )
          & ( ( in @ X4 @ sK4 )
            = $true ) )
      & ( ( in @ sK6 @ sK4 )
        = $true ) ) ),
    introduced(definition,[],[choice_axiom]) ).

thf(f20,plain,
    ( ? [X4: $i] :
        ( ( ( in @ ( kpair @ sK6 @ X4 ) @ sK5 )
         != $true )
        & ( ( in @ ( kpair @ sK6 @ X4 ) @ sK3 )
         != $true )
        & ( ( in @ ( kpair @ sK6 @ X4 ) @ ( binunion @ sK3 @ sK5 ) )
          = $true )
        & ( ( in @ X4 @ sK4 )
          = $true ) )
   => ( ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK5 )
       != $true )
      & ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK3 )
       != $true )
      & ( ( in @ ( kpair @ sK6 @ sK7 ) @ ( binunion @ sK3 @ sK5 ) )
        = $true )
      & ( ( in @ sK7 @ sK4 )
        = $true ) ) ),
    introduced(definition,[],[choice_axiom]) ).

thf(f10,plain,
    ( ? [X0: $i,X1: $i] :
        ( ? [X2: $i] :
            ( ? [X3: $i] :
                ( ? [X4: $i] :
                    ( ( ( in @ ( kpair @ X3 @ X4 ) @ X2 )
                     != $true )
                    & ( ( in @ ( kpair @ X3 @ X4 ) @ X0 )
                     != $true )
                    & ( ( in @ ( kpair @ X3 @ X4 ) @ ( binunion @ X0 @ X2 ) )
                      = $true )
                    & ( ( in @ X4 @ X1 )
                      = $true ) )
                & ( $true
                  = ( in @ X3 @ X1 ) ) )
            & ( ( breln1 @ X1 @ X2 )
              = $true ) )
        & ( ( breln1 @ X1 @ X0 )
          = $true ) )
    & ( binunionE = $true ) ),
    inference(flattening,[status(thm)],[f9]) ).

thf(f9,plain,
    ( ? [X0: $i,X1: $i] :
        ( ? [X2: $i] :
            ( ? [X3: $i] :
                ( ? [X4: $i] :
                    ( ( ( in @ ( kpair @ X3 @ X4 ) @ X0 )
                     != $true )
                    & ( ( in @ ( kpair @ X3 @ X4 ) @ X2 )
                     != $true )
                    & ( ( in @ ( kpair @ X3 @ X4 ) @ ( binunion @ X0 @ X2 ) )
                      = $true )
                    & ( ( in @ X4 @ X1 )
                      = $true ) )
                & ( $true
                  = ( in @ X3 @ X1 ) ) )
            & ( ( breln1 @ X1 @ X2 )
              = $true ) )
        & ( ( breln1 @ X1 @ X0 )
          = $true ) )
    & ( binunionE = $true ) ),
    inference(ennf_transformation,[status(thm)],[f6]) ).

thf(f6,plain,
    ~ ( ( binunionE = $true )
     => ! [X0: $i,X1: $i] :
          ( ( ( breln1 @ X1 @ X0 )
            = $true )
         => ! [X2: $i] :
              ( ( ( breln1 @ X1 @ X2 )
                = $true )
             => ! [X3: $i] :
                  ( ( $true
                    = ( in @ X3 @ X1 ) )
                 => ! [X4: $i] :
                      ( ( ( in @ X4 @ X1 )
                        = $true )
                     => ( ( ( in @ ( kpair @ X3 @ X4 ) @ ( binunion @ X0 @ X2 ) )
                          = $true )
                       => ( ( ( in @ ( kpair @ X3 @ X4 ) @ X0 )
                            = $true )
                          | ( ( in @ ( kpair @ X3 @ X4 ) @ X2 )
                            = $true ) ) ) ) ) ) ) ),
    inference(fool_elimination,[status(thm)],[f5]) ).

thf(f5,plain,
    ~ ( binunionE
     => ! [X0: $i,X1: $i] :
          ( ( breln1 @ X1 @ X0 )
         => ! [X2: $i] :
              ( ( breln1 @ X1 @ X2 )
             => ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ! [X4: $i] :
                      ( ( in @ X4 @ X1 )
                     => ( ( in @ ( kpair @ X3 @ X4 ) @ ( binunion @ X0 @ X2 ) )
                       => ( ( in @ ( kpair @ X3 @ X4 ) @ X0 )
                          | ( in @ ( kpair @ X3 @ X4 ) @ X2 ) ) ) ) ) ) ) ),
    inference(rectify,[status(thm)],[f3]) ).

thf(f3,negated_conjecture,
    ~ ( binunionE
     => ! [X3: $i,X0: $i] :
          ( ( breln1 @ X0 @ X3 )
         => ! [X4: $i] :
              ( ( breln1 @ X0 @ X4 )
             => ! [X2: $i] :
                  ( ( in @ X2 @ X0 )
                 => ! [X5: $i] :
                      ( ( in @ X5 @ X0 )
                     => ( ( in @ ( kpair @ X2 @ X5 ) @ ( binunion @ X3 @ X4 ) )
                       => ( ( in @ ( kpair @ X2 @ X5 ) @ X3 )
                          | ( in @ ( kpair @ X2 @ X5 ) @ X4 ) ) ) ) ) ) ) ),
    inference(negated_conjecture,[status(cth)],[f2]) ).

thf(f2,conjecture,
    ( binunionE
   => ! [X3: $i,X0: $i] :
        ( ( breln1 @ X0 @ X3 )
       => ! [X4: $i] :
            ( ( breln1 @ X0 @ X4 )
           => ! [X2: $i] :
                ( ( in @ X2 @ X0 )
               => ! [X5: $i] :
                    ( ( in @ X5 @ X0 )
                   => ( ( in @ ( kpair @ X2 @ X5 ) @ ( binunion @ X3 @ X4 ) )
                     => ( ( in @ ( kpair @ X2 @ X5 ) @ X3 )
                        | ( in @ ( kpair @ X2 @ X5 ) @ X4 ) ) ) ) ) ) ) ),
    file('/export/starexec/sandbox/tmp/tmp.qutryyItS4/DTF2THF_345.p',breln1unionE) ).

thf(f41,plain,
    ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK5 )
    = $true ),
    inference(subsumption_resolution,[status(thm)],[f40,f32]) ).

thf(f32,plain,
    ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK3 )
   != $true ),
    inference(cnf_transformation,[status(thm)],[f21]) ).

thf(f40,plain,
    ( ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK3 )
      = $true )
    | ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK5 )
      = $true ) ),
    inference(trivial_inequality_removal,[status(thm)],[f39]) ).

thf(f39,plain,
    ( ( $true != $true )
    | ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK5 )
      = $true )
    | ( ( in @ ( kpair @ sK6 @ sK7 ) @ sK3 )
      = $true ) ),
    inference(superposition,[status(thm)],[f38,f31]) ).

thf(f31,plain,
    ( ( in @ ( kpair @ sK6 @ sK7 ) @ ( binunion @ sK3 @ sK5 ) )
    = $true ),
    inference(cnf_transformation,[status(thm)],[f21]) ).

thf(f38,plain,
    ! [X3: $i,X4: $i,X5: $i] :
      ( ( ( in @ X3 @ ( binunion @ X4 @ X5 ) )
       != $true )
      | ( ( in @ X3 @ X4 )
        = $true )
      | ( ( in @ X3 @ X5 )
        = $true ) ),
    inference(trivial_inequality_removal,[status(thm)],[f37]) ).

thf(f37,plain,
    ! [X3: $i,X4: $i,X5: $i] :
      ( ( ( in @ X3 @ ( binunion @ X4 @ X5 ) )
       != $true )
      | ( $true != $true )
      | ( ( in @ X3 @ X5 )
        = $true )
      | ( ( in @ X3 @ X4 )
        = $true ) ),
    inference(definition_unfolding,[status(thm)],[f22,f26]) ).

thf(f26,plain,
    binunionE = $true,
    inference(cnf_transformation,[status(thm)],[f21]) ).

thf(f22,plain,
    ! [X3: $i,X4: $i,X5: $i] :
      ( ( ( in @ X3 @ ( binunion @ X4 @ X5 ) )
       != $true )
      | ( ( in @ X3 @ X4 )
        = $true )
      | ( ( in @ X3 @ X5 )
        = $true )
      | ( binunionE != $true ) ),
    inference(cnf_transformation,[status(thm)],[f16]) ).

thf(f16,plain,
    ( ( ( binunionE = $true )
      | ( ( ( in @ sK0 @ ( binunion @ sK1 @ sK2 ) )
          = $true )
        & ( ( in @ sK0 @ sK1 )
         != $true )
        & ( ( in @ sK0 @ sK2 )
         != $true ) ) )
    & ( ! [X3: $i,X4: $i,X5: $i] :
          ( ( ( in @ X3 @ ( binunion @ X4 @ X5 ) )
           != $true )
          | ( ( in @ X3 @ X4 )
            = $true )
          | ( ( in @ X3 @ X5 )
            = $true ) )
      | ( binunionE != $true ) ) ),
    inference(skolemisation,[status(esa),new_symbols(skolem,[sK0,sK1,sK2])],[f14,f15]) ).

thf(f15,plain,
    ( ? [X0: $i,X1: $i,X2: $i] :
        ( ( $true
          = ( in @ X0 @ ( binunion @ X1 @ X2 ) ) )
        & ( ( in @ X0 @ X1 )
         != $true )
        & ( ( in @ X0 @ X2 )
         != $true ) )
   => ( ( ( in @ sK0 @ ( binunion @ sK1 @ sK2 ) )
        = $true )
      & ( ( in @ sK0 @ sK1 )
       != $true )
      & ( ( in @ sK0 @ sK2 )
       != $true ) ) ),
    introduced(definition,[],[choice_axiom]) ).

thf(f14,plain,
    ( ( ( binunionE = $true )
      | ? [X0: $i,X1: $i,X2: $i] :
          ( ( $true
            = ( in @ X0 @ ( binunion @ X1 @ X2 ) ) )
          & ( ( in @ X0 @ X1 )
           != $true )
          & ( ( in @ X0 @ X2 )
           != $true ) ) )
    & ( ! [X3: $i,X4: $i,X5: $i] :
          ( ( ( in @ X3 @ ( binunion @ X4 @ X5 ) )
           != $true )
          | ( ( in @ X3 @ X4 )
            = $true )
          | ( ( in @ X3 @ X5 )
            = $true ) )
      | ( binunionE != $true ) ) ),
    inference(rectify,[status(thm)],[f13]) ).

thf(f13,plain,
    ( ( ( binunionE = $true )
      | ? [X1: $i,X2: $i,X0: $i] :
          ( ( ( in @ X1 @ ( binunion @ X2 @ X0 ) )
            = $true )
          & ( ( in @ X1 @ X2 )
           != $true )
          & ( ( in @ X1 @ X0 )
           != $true ) ) )
    & ( ! [X1: $i,X2: $i,X0: $i] :
          ( ( ( in @ X1 @ ( binunion @ X2 @ X0 ) )
           != $true )
          | ( ( in @ X1 @ X2 )
            = $true )
          | ( ( in @ X1 @ X0 )
            = $true ) )
      | ( binunionE != $true ) ) ),
    inference(nnf_transformation,[status(thm)],[f12]) ).

thf(f12,plain,
    ( ( binunionE = $true )
  <=> ! [X1: $i,X2: $i,X0: $i] :
        ( ( ( in @ X1 @ ( binunion @ X2 @ X0 ) )
         != $true )
        | ( ( in @ X1 @ X2 )
          = $true )
        | ( ( in @ X1 @ X0 )
          = $true ) ) ),
    inference(flattening,[status(thm)],[f11]) ).

thf(f11,plain,
    ( ( binunionE = $true )
  <=> ! [X1: $i,X0: $i,X2: $i] :
        ( ( ( in @ X1 @ X2 )
          = $true )
        | ( ( in @ X1 @ X0 )
          = $true )
        | ( ( in @ X1 @ ( binunion @ X2 @ X0 ) )
         != $true ) ) ),
    inference(ennf_transformation,[status(thm)],[f8]) ).

thf(f8,plain,
    ( ( binunionE = $true )
  <=> ! [X1: $i,X0: $i,X2: $i] :
        ( ( ( in @ X1 @ ( binunion @ X2 @ X0 ) )
          = $true )
       => ( ( ( in @ X1 @ X2 )
            = $true )
          | ( ( in @ X1 @ X0 )
            = $true ) ) ) ),
    inference(fool_elimination,[status(thm)],[f7]) ).

thf(f7,plain,
    ( binunionE
    = ( ! [X0: $i,X1: $i,X2: $i] :
          ( ( in @ X1 @ ( binunion @ X2 @ X0 ) )
         => ( ( in @ X1 @ X0 )
            | ( in @ X1 @ X2 ) ) ) ) ),
    inference(rectify,[status(thm)],[f1]) ).

thf(f1,axiom,
    ( binunionE
    = ( ! [X1: $i,X2: $i,X0: $i] :
          ( ( in @ X2 @ ( binunion @ X0 @ X1 ) )
         => ( ( in @ X2 @ X1 )
            | ( in @ X2 @ X0 ) ) ) ) ),
    file('/export/starexec/sandbox/tmp/tmp.qutryyItS4/DTF2THF_345.p',binunionE) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.09  % Problem  : SEU786^2 : TPTP v9.2.1. Released v3.7.0.
% 0.00/0.10  % Command  : /export/starexec/sandbox/solver/bin/run_DT2H2X /export/starexec/sandbox/benchmark/theBenchmark.p 300
% 0.12/0.30  % Computer : n017.cluster.edu
% 0.12/0.30  % Model    : x86_64 x86_64
% 0.12/0.30  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.30  % Memory   : 8042.1875MB
% 0.12/0.30  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.30  % CPULimit : 300
% 0.12/0.30  % WCLimit  : 300
% 0.12/0.30  % DateTime : Tue Feb 24 12:32:26 EST 2026
% 0.12/0.30  % CPUTime  : 
% 0.12/0.30  Running /export/starexec/sandbox/solver/bin/run_DT2H2X /export/starexec/sandbox/benchmark/theBenchmark.p 300
% 0.18/0.39  ---- Original DTF file ---
% 0.18/0.39  thf(spec,logic,$$dhol).
% 0.18/0.39  %------------------------------------------------------------------------------
% 0.18/0.39  % File     : SEU786^2 : TPTP v9.2.1. Released v3.7.0.
% 0.18/0.39  % Domain   : Set Theory
% 0.18/0.39  % Problem  : Binary Relations on a Set
% 0.18/0.39  % Version  : Especial > Reduced > Especial.
% 0.18/0.39  % English  : (! A:i.! R:i.breln1 A R -> (! S:i.breln1 A S -> (! x:i.in x A ->
% 0.18/0.39  %            (! y:i.in y A -> in (kpair x y) (binunion R S) ->
% 0.18/0.39  %            in (kpair x y) R | in (kpair x y) S))))
% 0.18/0.39  
% 0.18/0.39  % Refs     : [Bro08] Brown (2008), Email to G. Sutcliffe
% 0.18/0.39  % Source   : [Bro08]
% 0.18/0.39  % Names    : ZFC288l [Bro08]
% 0.18/0.39  
% 0.18/0.39  % Status   : Theorem
% 0.18/0.39  % Rating   : 0.00 v8.2.0, 0.08 v8.1.0, 0.00 v6.0.0, 0.14 v5.5.0, 0.17 v5.4.0, 0.20 v5.3.0, 0.40 v5.2.0, 0.20 v4.1.0, 0.00 v3.7.0
% 0.18/0.39  % Syntax   : Number of formulae    :    7 (   1 unt;   5 typ;   1 def)
% 0.18/0.39  %            Number of atoms       :   13 (   1 equ;   0 cnn)
% 0.18/0.39  %            Maximal formula atoms :    8 (   6 avg)
% 0.18/0.39  %            Number of connectives :   39 (   0   ~;   2   |;   0   &;  30   @)
% 0.18/0.39  %                                         (   0 <=>;   7  =>;   0  <=;   0 <~>)
% 0.18/0.39  %            Maximal formula depth :   17 (   9 avg)
% 0.18/0.39  %            Number of types       :    2 (   0 usr)
% 0.18/0.39  %            Number of type conns  :    8 (   8   >;   0   *;   0   +;   0  <<)
% 0.18/0.39  %            Number of symbols     :    6 (   5 usr;   1 con; 0-2 aty)
% 0.18/0.39  %            Number of variables   :    8 (   0   ^;   8   !;   0   ?;   8   :)
% 0.18/0.39  % SPC      : TH0_THM_EQU_NAR
% 0.18/0.39  
% 0.18/0.39  % Comments : http://mathgate.info/detsetitem.php?id=351
% 0.18/0.39  %------------------------------------------------------------------------------
% 0.18/0.39  thf(in_type,type,
% 0.18/0.39      in: $i > $i > $o ).
% 0.18/0.39  
% 0.18/0.39  thf(binunion_type,type,
% 0.18/0.39      binunion: $i > $i > $i ).
% 0.18/0.39  
% 0.18/0.39  thf(binunionE_type,type,
% 0.18/0.39      binunionE: $o ).
% 0.18/0.39  
% 0.18/0.39  thf(binunionE,definition,
% 0.18/0.39      ( binunionE
% 0.18/0.39      = ( ! [A: $i,B: $i,Xx: $i] :
% 0.18/0.39            ( ( in @ Xx @ ( binunion @ A @ B ) )
% 0.18/0.39           => ( ( in @ Xx @ A )
% 0.18/0.39              | ( in @ Xx @ B ) ) ) ) ) ).
% 0.18/0.39  
% 0.18/0.39  thf(kpair_type,type,
% 0.18/0.39      kpair: $i > $i > $i ).
% 0.18/0.39  
% 0.18/0.39  thf(breln1_type,type,
% 0.18/0.39      breln1: $i > $i > $o ).
% 0.18/0.39  
% 0.18/0.39  thf(breln1unionE,conjecture,
% 0.18/0.39      ( binunionE
% 0.18/0.39     => ! [A: $i,R: $i] :
% 0.18/0.39          ( ( breln1 @ A @ R )
% 0.18/0.39         => ! [S: $i] :
% 0.18/0.39              ( ( breln1 @ A @ S )
% 0.18/0.39             => ! [Xx: $i] :
% 0.18/0.39                  ( ( in @ Xx @ A )
% 0.18/0.39                 => ! [Xy: $i] :
% 0.18/0.39                      ( ( in @ Xy @ A )
% 0.18/0.39                     => ( ( in @ ( kpair @ Xx @ Xy ) @ ( binunion @ R @ S ) )
% 0.18/0.39                       => ( ( in @ ( kpair @ Xx @ Xy ) @ R )
% 0.18/0.39                          | ( in @ ( kpair @ Xx @ Xy ) @ S ) ) ) ) ) ) ) ) ).
% 0.18/0.39  
% 0.18/0.39  %------------------------------------------------------------------------------
% 0.18/0.39  ------------------------
% 0.25/1.30  ---- Embedded in THF ---
% 0.25/1.30  %%% This output was generated by embedproblem, version 1.9.5 (library version 1.9).
% 0.25/1.30  %%% Generated on Tue Feb 24 12:32:26 EST 2026
% 0.25/1.30  %%% using '$$dhol' embedding, version 1.3.0.
% 0.25/1.30  %%% Logic specification used:
% 0.25/1.30  %%% thf(spec, logic, $$dhol).
% 0.25/1.30  
% 0.25/1.30  % SZS output start ListOfTHF for /export/starexec/sandbox/tmp/tmp.qutryyItS4/DTF2DTF345.p
% See solution above
% 0.25/1.30  ------------------------
% 0.25/1.31  ---- Cleaned THF ---
% 0.25/1.31  thf(in_type,type,
% 0.25/1.31      in: $i > $i > $o ).
% 0.25/1.31  
% 0.25/1.31  thf(binunion_type,type,
% 0.25/1.31      binunion: $i > $i > $i ).
% 0.25/1.31  
% 0.25/1.31  thf(binunionE_type,type,
% 0.25/1.31      binunionE: $o ).
% 0.25/1.31  
% 0.25/1.31  thf(binunionE,definition,
% 0.25/1.31      ( binunionE
% 0.25/1.31      = ( ! [A: $i,B: $i,Xx: $i] :
% 0.25/1.31            ( ( in @ Xx @ ( binunion @ A @ B ) )
% 0.25/1.31           => ( ( in @ Xx @ A )
% 0.25/1.31              | ( in @ Xx @ B ) ) ) ) ) ).
% 0.25/1.31  
% 0.25/1.31  thf(kpair_type,type,
% 0.25/1.31      kpair: $i > $i > $i ).
% 0.25/1.31  
% 0.25/1.31  thf(breln1_type,type,
% 0.25/1.31      breln1: $i > $i > $o ).
% 0.25/1.31  
% 0.25/1.31  thf(breln1unionE,conjecture,
% 0.25/1.31      ( binunionE
% 0.25/1.31     => ! [A: $i,R: $i] :
% 0.25/1.31          ( ( breln1 @ A @ R )
% 0.25/1.31         => ! [S: $i] :
% 0.25/1.31              ( ( breln1 @ A @ S )
% 0.25/1.31             => ! [Xx: $i] :
% 0.25/1.31                  ( ( in @ Xx @ A )
% 0.25/1.31                 => ! [Xy: $i] :
% 0.25/1.31                      ( ( in @ Xy @ A )
% 0.25/1.31                     => ( ( in @ ( kpair @ Xx @ Xy ) @ ( binunion @ R @ S ) )
% 0.25/1.31                       => ( ( in @ ( kpair @ Xx @ Xy ) @ R )
% 0.25/1.31                          | ( in @ ( kpair @ Xx @ Xy ) @ S ) ) ) ) ) ) ) ) ).
% 0.25/1.31  ------------------------
% 0.25/1.33  % (445)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_345 for (2999ds/27Mi)
% 0.25/1.33  % (449)lrs+1004_1:128_cond=on:e2e=on:sp=weighted_frequency:i=18:si=on:rtra=on_0 on DTF2THF_345 for (2999ds/18Mi)
% 0.25/1.33  % (447)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_345 for (2999ds/2Mi)
% 0.25/1.33  % (444)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_345 for (2999ds/4Mi)
% 0.25/1.33  % (448)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_345 for (2999ds/275Mi)
% 0.25/1.33  % (446)lrs+10_1:1_au=on:inj=on:i=2:si=on:rtra=on_0 on DTF2THF_345 for (2999ds/2Mi)
% 0.25/1.33  % (443)lrs+1002_1:8_bd=off:fd=off:hud=10:tnu=1:i=183:si=on:rtra=on_0 on DTF2THF_345 for (2999ds/183Mi)
% 0.25/1.33  % (446)Instruction limit reached!
% 0.25/1.33  % (446)------------------------------
% 0.25/1.33  % (446)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 0.25/1.33  % (446)Termination reason: Unknown
% 0.25/1.33  % (447)Instruction limit reached!
% 0.25/1.33  % (447)------------------------------
% 0.25/1.33  % (447)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 0.25/1.33  % (446)Termination phase: Preprocessing 3
% 0.25/1.33  
% 0.25/1.33  % (446)Memory used [KB]: 1023
% 0.25/1.33  % (446)Time elapsed: 0.003 s
% 0.25/1.33  % (446)Instructions burned: 2 (million)
% 0.25/1.33  % (446)------------------------------
% 0.25/1.33  % (446)------------------------------
% 0.25/1.33  % (447)Termination reason: Unknown
% 0.25/1.33  % (447)Termination phase: shuffling
% 0.25/1.33  
% 0.25/1.33  % (447)Memory used [KB]: 895
% 0.25/1.33  % (447)Time elapsed: 0.003 s
% 0.25/1.33  % (447)Instructions burned: 2 (million)
% 0.25/1.33  % (447)------------------------------
% 0.25/1.33  % (447)------------------------------
% 0.25/1.33  % (448)First to succeed.
% 0.25/1.33  % (444)Instruction limit reached!
% 0.25/1.33  % (444)------------------------------
% 0.25/1.33  % (444)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 0.25/1.33  % (444)Termination reason: Unknown
% 0.25/1.33  % (444)Termination phase: Saturation
% 0.25/1.33  
% 0.25/1.33  % (444)Memory used [KB]: 5500
% 0.25/1.33  % (444)Time elapsed: 0.005 s
% 0.25/1.33  % (444)Instructions burned: 5 (million)
% 0.25/1.33  % (444)------------------------------
% 0.25/1.33  % (444)------------------------------
% 0.25/1.34  % (443)Also succeeded, but the first one will report.
% 0.25/1.34  % (449)Also succeeded, but the first one will report.
% 0.25/1.34  % (448)Refutation found. Thanks to Tanya!
% 0.25/1.34  % SZS status Theorem for DTF2THF_345
% 0.25/1.34  % SZS output start Proof for DTF2THF_345
% 0.25/1.34  thf(func_def_0, type, in: $i > $i > $o).
% 0.25/1.34  thf(func_def_1, type, binunion: $i > $i > $i).
% 0.25/1.34  thf(func_def_4, type, kpair: $i > $i > $i).
% 0.25/1.34  thf(func_def_5, type, breln1: $i > $i > $o).
% 0.25/1.34  thf(f42,plain,(
% 0.25/1.34    $false),
% 0.25/1.34    inference(subsumption_resolution,[status(thm)],[f41,f33])).
% 0.25/1.34  thf(f33,plain,(
% 0.25/1.34    ((in @ (kpair @ sK6 @ sK7) @ sK5) != $true)),
% 0.25/1.34    inference(cnf_transformation,[status(thm)],[f21])).
% 0.25/1.34  thf(f21,plain,(
% 0.25/1.34    ((((((in @ (kpair @ sK6 @ sK7) @ sK5) != $true) & ((in @ (kpair @ sK6 @ sK7) @ sK3) != $true) & ((in @ (kpair @ sK6 @ sK7) @ (binunion @ sK3 @ sK5)) = $true) & ((in @ sK7 @ sK4) = $true)) & ((in @ sK6 @ sK4) = $true)) & ((breln1 @ sK4 @ sK5) = $true)) & ((breln1 @ sK4 @ sK3) = $true)) & (binunionE = $true)),
% 0.25/1.34    inference(skolemisation,[status(esa),new_symbols(skolem,[sK3,sK4,sK5,sK6,sK7])],[f10,f20,f19,f18,f17])).
% 0.25/1.34  thf(f17,plain,(
% 0.25/1.34    ? [X0 : $i,X1 : $i] : (? [X2 : $i] : (? [X3 : $i] : (? [X4 : $i] : (((in @ (kpair @ X3 @ X4) @ X2) != $true) & ((in @ (kpair @ X3 @ X4) @ X0) != $true) & ((in @ (kpair @ X3 @ X4) @ (binunion @ X0 @ X2)) = $true) & ((in @ X4 @ X1) = $true)) & ($true = (in @ X3 @ X1))) & ((breln1 @ X1 @ X2) = $true)) & ((breln1 @ X1 @ X0) = $true)) => (? [X2 : $i] : (? [X3 : $i] : (? [X4 : $i] : (((in @ (kpair @ X3 @ X4) @ X2) != $true) & ((in @ (kpair @ X3 @ X4) @ sK3) != $true) & ((in @ (kpair @ X3 @ X4) @ (binunion @ sK3 @ X2)) = $true) & ((in @ X4 @ sK4) = $true)) & ((in @ X3 @ sK4) = $true)) & ((breln1 @ sK4 @ X2) = $true)) & ((breln1 @ sK4 @ sK3) = $true))),
% 0.25/1.34    introduced(definition,[],[choice_axiom])).
% 0.25/1.34  thf(f18,plain,(
% 0.25/1.34    ? [X2 : $i] : (? [X3 : $i] : (? [X4 : $i] : (((in @ (kpair @ X3 @ X4) @ X2) != $true) & ((in @ (kpair @ X3 @ X4) @ sK3) != $true) & ((in @ (kpair @ X3 @ X4) @ (binunion @ sK3 @ X2)) = $true) & ((in @ X4 @ sK4) = $true)) & ((in @ X3 @ sK4) = $true)) & ((breln1 @ sK4 @ X2) = $true)) => (? [X3 : $i] : (? [X4 : $i] : (((in @ (kpair @ X3 @ X4) @ sK5) != $true) & ((in @ (kpair @ X3 @ X4) @ sK3) != $true) & ((in @ (kpair @ X3 @ X4) @ (binunion @ sK3 @ sK5)) = $true) & ((in @ X4 @ sK4) = $true)) & ((in @ X3 @ sK4) = $true)) & ((breln1 @ sK4 @ sK5) = $true))),
% 0.25/1.34    introduced(definition,[],[choice_axiom])).
% 0.25/1.34  thf(f19,plain,(
% 0.25/1.34    ? [X3 : $i] : (? [X4 : $i] : (((in @ (kpair @ X3 @ X4) @ sK5) != $true) & ((in @ (kpair @ X3 @ X4) @ sK3) != $true) & ((in @ (kpair @ X3 @ X4) @ (binunion @ sK3 @ sK5)) = $true) & ((in @ X4 @ sK4) = $true)) & ((in @ X3 @ sK4) = $true)) => (? [X4 : $i] : (((in @ (kpair @ sK6 @ X4) @ sK5) != $true) & ((in @ (kpair @ sK6 @ X4) @ sK3) != $true) & ((in @ (kpair @ sK6 @ X4) @ (binunion @ sK3 @ sK5)) = $true) & ((in @ X4 @ sK4) = $true)) & ((in @ sK6 @ sK4) = $true))),
% 0.25/1.34    introduced(definition,[],[choice_axiom])).
% 0.25/1.34  thf(f20,plain,(
% 0.25/1.34    ? [X4 : $i] : (((in @ (kpair @ sK6 @ X4) @ sK5) != $true) & ((in @ (kpair @ sK6 @ X4) @ sK3) != $true) & ((in @ (kpair @ sK6 @ X4) @ (binunion @ sK3 @ sK5)) = $true) & ((in @ X4 @ sK4) = $true)) => (((in @ (kpair @ sK6 @ sK7) @ sK5) != $true) & ((in @ (kpair @ sK6 @ sK7) @ sK3) != $true) & ((in @ (kpair @ sK6 @ sK7) @ (binunion @ sK3 @ sK5)) = $true) & ((in @ sK7 @ sK4) = $true))),
% 0.25/1.34    introduced(definition,[],[choice_axiom])).
% 0.25/1.34  thf(f10,plain,(
% 0.25/1.34    ? [X0 : $i,X1 : $i] : (? [X2 : $i] : (? [X3 : $i] : (? [X4 : $i] : (((in @ (kpair @ X3 @ X4) @ X2) != $true) & ((in @ (kpair @ X3 @ X4) @ X0) != $true) & ((in @ (kpair @ X3 @ X4) @ (binunion @ X0 @ X2)) = $true) & ((in @ X4 @ X1) = $true)) & ($true = (in @ X3 @ X1))) & ((breln1 @ X1 @ X2) = $true)) & ((breln1 @ X1 @ X0) = $true)) & (binunionE = $true)),
% 0.25/1.34    inference(flattening,[status(thm)],[f9])).
% 0.25/1.34  thf(f9,plain,(
% 0.25/1.34    ? [X0 : $i,X1 : $i] : (? [X2 : $i] : (? [X3 : $i] : (? [X4 : $i] : (((((in @ (kpair @ X3 @ X4) @ X0) != $true) & ((in @ (kpair @ X3 @ X4) @ X2) != $true)) & ((in @ (kpair @ X3 @ X4) @ (binunion @ X0 @ X2)) = $true)) & ((in @ X4 @ X1) = $true)) & ($true = (in @ X3 @ X1))) & ((breln1 @ X1 @ X2) = $true)) & ((breln1 @ X1 @ X0) = $true)) & (binunionE = $true)),
% 0.25/1.34    inference(ennf_transformation,[status(thm)],[f6])).
% 0.25/1.34  thf(f6,plain,(
% 0.25/1.34    ~((binunionE = $true) => ! [X0 : $i,X1 : $i] : (((breln1 @ X1 @ X0) = $true) => ! [X2 : $i] : (((breln1 @ X1 @ X2) = $true) => ! [X3 : $i] : (($true = (in @ X3 @ X1)) => ! [X4 : $i] : (((in @ X4 @ X1) = $true) => (((in @ (kpair @ X3 @ X4) @ (binunion @ X0 @ X2)) = $true) => (((in @ (kpair @ X3 @ X4) @ X0) = $true) | ((in @ (kpair @ X3 @ X4) @ X2) = $true))))))))),
% 0.25/1.34    inference(fool_elimination,[status(thm)],[f5])).
% 0.25/1.34  thf(f5,plain,(
% 0.25/1.34    ~(binunionE => ! [X0 : $i,X1 : $i] : ((breln1 @ X1 @ X0) => ! [X2 : $i] : ((breln1 @ X1 @ X2) => ! [X3 : $i] : ((in @ X3 @ X1) => ! [X4 : $i] : ((in @ X4 @ X1) => ((in @ (kpair @ X3 @ X4) @ (binunion @ X0 @ X2)) => ((in @ (kpair @ X3 @ X4) @ X0) | (in @ (kpair @ X3 @ X4) @ X2))))))))),
% 0.25/1.34    inference(rectify,[status(thm)],[f3])).
% 0.25/1.34  thf(f3,negated_conjecture,(
% 0.25/1.34    ~(binunionE => ! [X3 : $i,X0 : $i] : ((breln1 @ X0 @ X3) => ! [X4 : $i] : ((breln1 @ X0 @ X4) => ! [X2 : $i] : ((in @ X2 @ X0) => ! [X5 : $i] : ((in @ X5 @ X0) => ((in @ (kpair @ X2 @ X5) @ (binunion @ X3 @ X4)) => ((in @ (kpair @ X2 @ X5) @ X3) | (in @ (kpair @ X2 @ X5) @ X4))))))))),
% 0.25/1.34    inference(negated_conjecture,[status(cth)],[f2])).
% 0.25/1.34  thf(f2,conjecture,(
% 0.25/1.34    binunionE => ! [X3 : $i,X0 : $i] : ((breln1 @ X0 @ X3) => ! [X4 : $i] : ((breln1 @ X0 @ X4) => ! [X2 : $i] : ((in @ X2 @ X0) => ! [X5 : $i] : ((in @ X5 @ X0) => ((in @ (kpair @ X2 @ X5) @ (binunion @ X3 @ X4)) => ((in @ (kpair @ X2 @ X5) @ X3) | (in @ (kpair @ X2 @ X5) @ X4)))))))),
% 0.25/1.34    file('/export/starexec/sandbox/tmp/tmp.qutryyItS4/DTF2THF_345.p',breln1unionE)).
% 0.25/1.34  thf(f41,plain,(
% 0.25/1.34    ((in @ (kpair @ sK6 @ sK7) @ sK5) = $true)),
% 0.25/1.34    inference(subsumption_resolution,[status(thm)],[f40,f32])).
% 0.25/1.34  thf(f32,plain,(
% 0.25/1.34    ((in @ (kpair @ sK6 @ sK7) @ sK3) != $true)),
% 0.25/1.34    inference(cnf_transformation,[status(thm)],[f21])).
% 0.25/1.34  thf(f40,plain,(
% 0.25/1.34    ((in @ (kpair @ sK6 @ sK7) @ sK3) = $true) | ((in @ (kpair @ sK6 @ sK7) @ sK5) = $true)),
% 0.25/1.34    inference(trivial_inequality_removal,[status(thm)],[f39])).
% 0.25/1.34  thf(f39,plain,(
% 0.25/1.34    ($true != $true) | ((in @ (kpair @ sK6 @ sK7) @ sK5) = $true) | ((in @ (kpair @ sK6 @ sK7) @ sK3) = $true)),
% 0.25/1.34    inference(superposition,[status(thm)],[f38,f31])).
% 0.25/1.34  thf(f31,plain,(
% 0.25/1.34    ((in @ (kpair @ sK6 @ sK7) @ (binunion @ sK3 @ sK5)) = $true)),
% 0.25/1.34    inference(cnf_transformation,[status(thm)],[f21])).
% 0.25/1.34  thf(f38,plain,(
% 0.25/1.34    ( ! [X3 : $i,X4 : $i,X5 : $i] : (((in @ X3 @ (binunion @ X4 @ X5)) != $true) | ((in @ X3 @ X4) = $true) | ((in @ X3 @ X5) = $true)) )),
% 0.25/1.34    inference(trivial_inequality_removal,[status(thm)],[f37])).
% 0.25/1.34  thf(f37,plain,(
% 0.25/1.34    ( ! [X3 : $i,X4 : $i,X5 : $i] : (((in @ X3 @ (binunion @ X4 @ X5)) != $true) | ($true != $true) | ((in @ X3 @ X5) = $true) | ((in @ X3 @ X4) = $true)) )),
% 0.25/1.34    inference(definition_unfolding,[status(thm)],[f22,f26])).
% 0.25/1.34  thf(f26,plain,(
% 0.25/1.34    (binunionE = $true)),
% 0.25/1.34    inference(cnf_transformation,[status(thm)],[f21])).
% 0.25/1.34  thf(f22,plain,(
% 0.25/1.34    ( ! [X3 : $i,X4 : $i,X5 : $i] : (((in @ X3 @ (binunion @ X4 @ X5)) != $true) | ((in @ X3 @ X4) = $true) | ((in @ X3 @ X5) = $true) | (binunionE != $true)) )),
% 0.25/1.34    inference(cnf_transformation,[status(thm)],[f16])).
% 0.25/1.34  thf(f16,plain,(
% 0.25/1.34    ((binunionE = $true) | (((in @ sK0 @ (binunion @ sK1 @ sK2)) = $true) & ((in @ sK0 @ sK1) != $true) & ((in @ sK0 @ sK2) != $true))) & (! [X3 : $i,X4 : $i,X5 : $i] : (((in @ X3 @ (binunion @ X4 @ X5)) != $true) | ((in @ X3 @ X4) = $true) | ((in @ X3 @ X5) = $true)) | (binunionE != $true))),
% 0.25/1.34    inference(skolemisation,[status(esa),new_symbols(skolem,[sK0,sK1,sK2])],[f14,f15])).
% 0.25/1.34  thf(f15,plain,(
% 0.25/1.34    ? [X0 : $i,X1 : $i,X2 : $i] : (($true = (in @ X0 @ (binunion @ X1 @ X2))) & ((in @ X0 @ X1) != $true) & ((in @ X0 @ X2) != $true)) => (((in @ sK0 @ (binunion @ sK1 @ sK2)) = $true) & ((in @ sK0 @ sK1) != $true) & ((in @ sK0 @ sK2) != $true))),
% 0.25/1.34    introduced(definition,[],[choice_axiom])).
% 0.25/1.34  thf(f14,plain,(
% 0.25/1.34    ((binunionE = $true) | ? [X0 : $i,X1 : $i,X2 : $i] : (($true = (in @ X0 @ (binunion @ X1 @ X2))) & ((in @ X0 @ X1) != $true) & ((in @ X0 @ X2) != $true))) & (! [X3 : $i,X4 : $i,X5 : $i] : (((in @ X3 @ (binunion @ X4 @ X5)) != $true) | ((in @ X3 @ X4) = $true) | ((in @ X3 @ X5) = $true)) | (binunionE != $true))),
% 0.25/1.34    inference(rectify,[status(thm)],[f13])).
% 0.25/1.34  thf(f13,plain,(
% 0.25/1.34    ((binunionE = $true) | ? [X1 : $i,X2 : $i,X0 : $i] : (((in @ X1 @ (binunion @ X2 @ X0)) = $true) & ((in @ X1 @ X2) != $true) & ((in @ X1 @ X0) != $true))) & (! [X1 : $i,X2 : $i,X0 : $i] : (((in @ X1 @ (binunion @ X2 @ X0)) != $true) | ((in @ X1 @ X2) = $true) | ((in @ X1 @ X0) = $true)) | (binunionE != $true))),
% 0.25/1.34    inference(nnf_transformation,[status(thm)],[f12])).
% 0.25/1.34  thf(f12,plain,(
% 0.25/1.34    (binunionE = $true) <=> ! [X1 : $i,X2 : $i,X0 : $i] : (((in @ X1 @ (binunion @ X2 @ X0)) != $true) | ((in @ X1 @ X2) = $true) | ((in @ X1 @ X0) = $true))),
% 0.25/1.34    inference(flattening,[status(thm)],[f11])).
% 0.25/1.34  thf(f11,plain,(
% 0.25/1.34    (binunionE = $true) <=> ! [X1 : $i,X0 : $i,X2 : $i] : ((((in @ X1 @ X2) = $true) | ((in @ X1 @ X0) = $true)) | ((in @ X1 @ (binunion @ X2 @ X0)) != $true))),
% 0.25/1.34    inference(ennf_transformation,[status(thm)],[f8])).
% 0.25/1.34  thf(f8,plain,(
% 0.25/1.34    (binunionE = $true) <=> ! [X1 : $i,X0 : $i,X2 : $i] : (((in @ X1 @ (binunion @ X2 @ X0)) = $true) => (((in @ X1 @ X2) = $true) | ((in @ X1 @ X0) = $true)))),
% 0.25/1.34    inference(fool_elimination,[status(thm)],[f7])).
% 0.25/1.34  thf(f7,plain,(
% 0.25/1.34    (binunionE = ! [X0 : $i,X1 : $i,X2 : $i] : ((in @ X1 @ (binunion @ X2 @ X0)) => ((in @ X1 @ X0) | (in @ X1 @ X2))))),
% 0.25/1.34    inference(rectify,[status(thm)],[f1])).
% 0.25/1.34  thf(f1,axiom,(
% 0.25/1.34    (binunionE = ! [X1 : $i,X2 : $i,X0 : $i] : ((in @ X2 @ (binunion @ X0 @ X1)) => ((in @ X2 @ X1) | (in @ X2 @ X0))))),
% 0.25/1.34    file('/export/starexec/sandbox/tmp/tmp.qutryyItS4/DTF2THF_345.p',binunionE)).
% 0.25/1.34  % SZS output end Proof for DTF2THF_345
% 0.25/1.34  % (448)------------------------------
% 0.25/1.34  % (448)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 0.25/1.34  % (448)Termination reason: Refutation
% 0.25/1.34  
% 0.25/1.34  % (448)Memory used [KB]: 5500
% 0.25/1.34  % (448)Time elapsed: 0.006 s
% 0.25/1.34  % (448)Instructions burned: 4 (million)
% 0.25/1.34  % (448)------------------------------
% 0.25/1.34  % (448)------------------------------
% 0.25/1.34  % (442)Success in time 0.02 s
%------------------------------------------------------------------------------