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DT2H2X---1.9.5.THM-Ref.s

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%------------------------------------------------------------------------------
% File     : DT2H2X---1.9.5
% Problem  : NUM769^1 : TPTP v9.2.1. Released v3.7.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : /export/starexec/sandbox2/solver/bin/run_DT2H2X /export/starexec/sandbox2/benchmark/theBenchmark.p 300

% Computer : n003.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 09:24:39 AM UTC 2026

% Result   : Theorem 1.46s 1.27s
% Output   : Refutation 1.46s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   10
%            Number of leaves      :    4
% Syntax   : Number of formulae    :   27 (  14 unt;   0 typ;   0 def)
%            Number of atoms       :   92 (  26 equ;   0 cnn)
%            Maximal formula atoms :    2 (   3 avg)
%            Number of connectives :  158 (  13   ~;   7   |;   0   &; 132   @)
%                                         (   0 <=>;   6  =>;   0  <=;   0 <~>)
%            Maximal formula depth :    9 (   4 avg)
%            Number of types       :    2 (   1 usr)
%            Number of type conns  :    0 (   0   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :   10 (   7 usr;   4 con; 0-2 aty)
%            Number of variables   :   22 (   0   ^;  22   !;   0   ?;  22   :)

% Comments : 
%------------------------------------------------------------------------------
thf(type_def_5,type,
    frac: $tType ).

thf(func_def_0,type,
    frac: $tType ).

thf(func_def_1,type,
    x: frac ).

thf(func_def_2,type,
    y: frac ).

thf(func_def_3,type,
    moref: frac > frac > $o ).

thf(func_def_5,type,
    eq: frac > frac > $o ).

thf(func_def_6,type,
    pf: frac > frac > frac ).

thf(func_def_7,type,
    mf: frac > frac > frac ).

thf(func_def_8,type,
    vEPSILON: 
      !>[X0: $tType] : ( ( X0 > $o ) > X0 ) ).

thf(f30,plain,
    $false,
    inference(trivial_inequality_removal,[status(thm)],[f27]) ).

thf(f27,plain,
    $true != $true,
    inference(superposition,[status(thm)],[f19,f26]) ).

thf(f26,plain,
    ( ( eq @ x @ ( pf @ y @ ( mf @ x @ y ) ) )
    = $true ),
    inference(trivial_inequality_removal,[status(thm)],[f25]) ).

thf(f25,plain,
    ( ( ( eq @ x @ ( pf @ y @ ( mf @ x @ y ) ) )
      = $true )
    | ( $true != $true ) ),
    inference(superposition,[status(thm)],[f22,f24]) ).

thf(f24,plain,
    ( ( eq @ ( pf @ y @ ( mf @ x @ y ) ) @ x )
    = $true ),
    inference(trivial_inequality_removal,[status(thm)],[f23]) ).

thf(f23,plain,
    ( ( $true != $true )
    | ( ( eq @ ( pf @ y @ ( mf @ x @ y ) ) @ x )
      = $true ) ),
    inference(superposition,[status(thm)],[f21,f20]) ).

thf(f20,plain,
    ( ( moref @ x @ y )
    = $true ),
    inference(cnf_transformation,[status(thm)],[f12]) ).

thf(f12,plain,
    ( ( moref @ x @ y )
    = $true ),
    inference(fool_elimination,[status(thm)],[f11]) ).

thf(f11,plain,
    moref @ x @ y,
    inference(rectify,[status(thm)],[f1]) ).

thf(f1,axiom,
    moref @ x @ y,
    file('/export/starexec/sandbox2/tmp/tmp.WCHdhNKxgA/DTF2THF_21388.p',m) ).

thf(f21,plain,
    ! [X0: frac,X1: frac] :
      ( ( ( moref @ X1 @ X0 )
       != $true )
      | ( $true
        = ( eq @ ( pf @ X0 @ ( mf @ X1 @ X0 ) ) @ X1 ) ) ),
    inference(cnf_transformation,[status(thm)],[f16]) ).

thf(f16,plain,
    ! [X0: frac,X1: frac] :
      ( ( ( moref @ X1 @ X0 )
       != $true )
      | ( $true
        = ( eq @ ( pf @ X0 @ ( mf @ X1 @ X0 ) ) @ X1 ) ) ),
    inference(ennf_transformation,[status(thm)],[f14]) ).

thf(f14,plain,
    ! [X0: frac,X1: frac] :
      ( ( ( moref @ X1 @ X0 )
        = $true )
     => ( $true
        = ( eq @ ( pf @ X0 @ ( mf @ X1 @ X0 ) ) @ X1 ) ) ),
    inference(fool_elimination,[status(thm)],[f13]) ).

thf(f13,plain,
    ! [X0: frac,X1: frac] :
      ( ( moref @ X1 @ X0 )
     => ( eq @ ( pf @ X0 @ ( mf @ X1 @ X0 ) ) @ X1 ) ),
    inference(rectify,[status(thm)],[f3]) ).

thf(f3,axiom,
    ! [X1: frac,X0: frac] :
      ( ( moref @ X0 @ X1 )
     => ( eq @ ( pf @ X1 @ ( mf @ X0 @ X1 ) ) @ X0 ) ),
    file('/export/starexec/sandbox2/tmp/tmp.WCHdhNKxgA/DTF2THF_21388.p',satz67c) ).

thf(f22,plain,
    ! [X0: frac,X1: frac] :
      ( ( ( eq @ X0 @ X1 )
       != $true )
      | ( ( eq @ X1 @ X0 )
        = $true ) ),
    inference(cnf_transformation,[status(thm)],[f18]) ).

thf(f18,plain,
    ! [X0: frac,X1: frac] :
      ( ( ( eq @ X1 @ X0 )
        = $true )
      | ( ( eq @ X0 @ X1 )
       != $true ) ),
    inference(rectify,[status(thm)],[f17]) ).

thf(f17,plain,
    ! [X1: frac,X0: frac] :
      ( ( ( eq @ X0 @ X1 )
        = $true )
      | ( ( eq @ X1 @ X0 )
       != $true ) ),
    inference(ennf_transformation,[status(thm)],[f10]) ).

thf(f10,plain,
    ! [X0: frac,X1: frac] :
      ( ( ( eq @ X1 @ X0 )
        = $true )
     => ( ( eq @ X0 @ X1 )
        = $true ) ),
    inference(fool_elimination,[status(thm)],[f9]) ).

thf(f9,plain,
    ! [X0: frac,X1: frac] :
      ( ( eq @ X1 @ X0 )
     => ( eq @ X0 @ X1 ) ),
    inference(rectify,[status(thm)],[f2]) ).

thf(f2,axiom,
    ! [X1: frac,X0: frac] :
      ( ( eq @ X0 @ X1 )
     => ( eq @ X1 @ X0 ) ),
    file('/export/starexec/sandbox2/tmp/tmp.WCHdhNKxgA/DTF2THF_21388.p',satz38) ).

thf(f19,plain,
    ( ( eq @ x @ ( pf @ y @ ( mf @ x @ y ) ) )
   != $true ),
    inference(cnf_transformation,[status(thm)],[f15]) ).

thf(f15,plain,
    ( ( eq @ x @ ( pf @ y @ ( mf @ x @ y ) ) )
   != $true ),
    inference(flattening,[status(thm)],[f8]) ).

thf(f8,plain,
    ( ( eq @ x @ ( pf @ y @ ( mf @ x @ y ) ) )
   != $true ),
    inference(fool_elimination,[status(thm)],[f7]) ).

thf(f7,plain,
    ~ ( eq @ x @ ( pf @ y @ ( mf @ x @ y ) ) ),
    inference(rectify,[status(thm)],[f5]) ).

thf(f5,negated_conjecture,
    ~ ( eq @ x @ ( pf @ y @ ( mf @ x @ y ) ) ),
    inference(negated_conjecture,[status(cth)],[f4]) ).

thf(f4,conjecture,
    eq @ x @ ( pf @ y @ ( mf @ x @ y ) ),
    file('/export/starexec/sandbox2/tmp/tmp.WCHdhNKxgA/DTF2THF_21388.p',satz67d) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.12  % Problem  : NUM769^1 : TPTP v9.2.1. Released v3.7.0.
% 0.00/0.13  % Command  : /export/starexec/sandbox2/solver/bin/run_DT2H2X /export/starexec/sandbox2/benchmark/theBenchmark.p 300
% 0.15/0.34  % Computer : n003.cluster.edu
% 0.15/0.34  % Model    : x86_64 x86_64
% 0.15/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.15/0.34  % Memory   : 8042.1875MB
% 0.15/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.15/0.34  % CPULimit : 300
% 0.15/0.34  % WCLimit  : 300
% 0.15/0.34  % DateTime : Tue Feb 24 11:13:41 EST 2026
% 0.15/0.34  % CPUTime  : 
% 0.15/0.34  Running /export/starexec/sandbox2/solver/bin/run_DT2H2X /export/starexec/sandbox2/benchmark/theBenchmark.p 300
% 0.19/0.46  ---- Original DTF file ---
% 0.19/0.46  thf(spec,logic,$$dhol).
% 0.19/0.46  %------------------------------------------------------------------------------
% 0.19/0.46  % File     : NUM769^1 : TPTP v9.2.1. Released v3.7.0.
% 0.19/0.46  % Domain   : Number Theory
% 0.19/0.46  % Problem  : Landau theorem 67d
% 0.19/0.46  % Version  : Especial.
% 0.19/0.46  % English  : eq x (pf y (mf x y))
% 0.19/0.46  
% 0.19/0.46  % Refs     : [Lan30] Landau (1930), Grundlagen der Analysis
% 0.19/0.46  %          : [vBJ79] van Benthem Jutting (1979), Checking Landau's "Grundla
% 0.19/0.46  %          : [Bro09] Brown (2009), Email to Geoff Sutcliffe
% 0.19/0.46  % Source   : [Bro09]
% 0.19/0.46  % Names    : satz67d [Lan30]
% 0.19/0.46  
% 0.19/0.46  % Status   : Theorem
% 0.19/0.46  %          : Without extensionality : Theorem
% 0.19/0.46  % Rating   : 0.00 v3.7.0
% 0.19/0.46  % Syntax   : Number of formulae    :   11 (   2 unt;   7 typ;   0 def)
% 0.19/0.46  %            Number of atoms       :    6 (   0 equ;   0 cnn)
% 0.19/0.46  %            Maximal formula atoms :    2 (   1 avg)
% 0.19/0.46  %            Number of connectives :   22 (   0   ~;   0   |;   0   &;  20   @)
% 0.19/0.46  %                                         (   0 <=>;   2  =>;   0  <=;   0 <~>)
% 0.19/0.46  %            Maximal formula depth :    9 (   6 avg)
% 0.19/0.46  %            Number of types       :    2 (   1 usr)
% 0.19/0.46  %            Number of type conns  :    8 (   8   >;   0   *;   0   +;   0  <<)
% 0.19/0.46  %            Number of symbols     :    6 (   6 usr;   2 con; 0-2 aty)
% 0.19/0.46  %            Number of variables   :    4 (   0   ^;   4   !;   0   ?;   4   :)
% 0.19/0.46  % SPC      : TH0_THM_NEQ_NAR
% 0.19/0.46  
% 0.19/0.46  % Comments : 
% 0.19/0.46  %------------------------------------------------------------------------------
% 0.19/0.46  thf(frac_type,type,
% 0.19/0.46      frac: $tType ).
% 0.19/0.46  
% 0.19/0.46  thf(x,type,
% 0.19/0.46      x: frac ).
% 0.19/0.46  
% 0.19/0.46  thf(y,type,
% 0.19/0.46      y: frac ).
% 0.19/0.46  
% 0.19/0.46  thf(moref,type,
% 0.19/0.46      moref: frac > frac > $o ).
% 0.19/0.46  
% 0.19/0.46  thf(m,axiom,
% 0.19/0.46      moref @ x @ y ).
% 0.19/0.46  
% 0.19/0.46  thf(eq,type,
% 0.19/0.46      eq: frac > frac > $o ).
% 0.19/0.46  
% 0.19/0.46  thf(pf,type,
% 0.19/0.46      pf: frac > frac > frac ).
% 0.19/0.46  
% 0.19/0.46  thf(mf,type,
% 0.19/0.46      mf: frac > frac > frac ).
% 0.19/0.46  
% 0.19/0.46  thf(satz38,axiom,
% 0.19/0.46      ! [Xx: frac,Xy: frac] :
% 0.19/0.46        ( ( eq @ Xx @ Xy )
% 0.19/0.46       => ( eq @ Xy @ Xx ) ) ).
% 0.19/0.46  
% 0.19/0.46  thf(satz67c,axiom,
% 0.19/0.46      ! [Xx: frac,Xy: frac] :
% 0.19/0.46        ( ( moref @ Xx @ Xy )
% 0.19/0.46       => ( eq @ ( pf @ Xy @ ( mf @ Xx @ Xy ) ) @ Xx ) ) ).
% 0.19/0.46  
% 0.19/0.46  thf(satz67d,conjecture,
% 0.19/0.46      eq @ x @ ( pf @ y @ ( mf @ x @ y ) ) ).
% 0.19/0.46  
% 0.19/0.46  %------------------------------------------------------------------------------
% 0.19/0.46  ------------------------
% 1.46/1.24  ---- Embedded in THF ---
% 1.46/1.24  %%% This output was generated by embedproblem, version 1.9.5 (library version 1.9).
% 1.46/1.24  %%% Generated on Tue Feb 24 11:13:41 EST 2026
% 1.46/1.24  %%% using '$$dhol' embedding, version 1.3.0.
% 1.46/1.24  %%% Logic specification used:
% 1.46/1.24  %%% thf(spec, logic, $$dhol).
% 1.46/1.24  
% 1.46/1.24  % SZS output start ListOfTHF for /export/starexec/sandbox2/tmp/tmp.WCHdhNKxgA/DTF2DTF21388.p
% See solution above
% 1.46/1.24  ------------------------
% 1.46/1.25  ---- Cleaned THF ---
% 1.46/1.25  thf(frac_type,type,
% 1.46/1.25      frac: $tType ).
% 1.46/1.25  
% 1.46/1.25  thf(x,type,
% 1.46/1.25      x: frac ).
% 1.46/1.25  
% 1.46/1.25  thf(y,type,
% 1.46/1.25      y: frac ).
% 1.46/1.25  
% 1.46/1.25  thf(moref,type,
% 1.46/1.25      moref: frac > frac > $o ).
% 1.46/1.25  
% 1.46/1.25  thf(m,axiom,
% 1.46/1.25      moref @ x @ y ).
% 1.46/1.25  
% 1.46/1.25  thf(eq,type,
% 1.46/1.25      eq: frac > frac > $o ).
% 1.46/1.25  
% 1.46/1.25  thf(pf,type,
% 1.46/1.25      pf: frac > frac > frac ).
% 1.46/1.25  
% 1.46/1.25  thf(mf,type,
% 1.46/1.25      mf: frac > frac > frac ).
% 1.46/1.25  
% 1.46/1.25  thf(satz38,axiom,
% 1.46/1.25      ! [Xx: frac,Xy: frac] :
% 1.46/1.25        ( ( eq @ Xx @ Xy )
% 1.46/1.25       => ( eq @ Xy @ Xx ) ) ).
% 1.46/1.25  
% 1.46/1.25  thf(satz67c,axiom,
% 1.46/1.25      ! [Xx: frac,Xy: frac] :
% 1.46/1.25        ( ( moref @ Xx @ Xy )
% 1.46/1.25       => ( eq @ ( pf @ Xy @ ( mf @ Xx @ Xy ) ) @ Xx ) ) ).
% 1.46/1.25  
% 1.46/1.25  thf(satz67d,conjecture,
% 1.46/1.25      eq @ x @ ( pf @ y @ ( mf @ x @ y ) ) ).
% 1.46/1.25  ------------------------
% 1.46/1.27  % (21504)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_21388 for (2999ds/27Mi)
% 1.46/1.27  % (21507)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_21388 for (2999ds/275Mi)
% 1.46/1.27  % (21504)First to succeed.
% 1.46/1.27  % (21507)Also succeeded, but the first one will report.
% 1.46/1.27  % (21504)Refutation found. Thanks to Tanya!
% 1.46/1.27  % SZS status Theorem for DTF2THF_21388
% 1.46/1.27  % SZS output start Proof for DTF2THF_21388
% 1.46/1.27  thf(type_def_5, type, frac: $tType).
% 1.46/1.27  thf(func_def_0, type, frac: $tType).
% 1.46/1.27  thf(func_def_1, type, x: frac).
% 1.46/1.27  thf(func_def_2, type, y: frac).
% 1.46/1.27  thf(func_def_3, type, moref: frac > frac > $o).
% 1.46/1.27  thf(func_def_5, type, eq: frac > frac > $o).
% 1.46/1.27  thf(func_def_6, type, pf: frac > frac > frac).
% 1.46/1.27  thf(func_def_7, type, mf: frac > frac > frac).
% 1.46/1.27  thf(func_def_8, type, vEPSILON: !>[X0: $tType]:((X0 > $o) > X0)).
% 1.46/1.27  thf(f30,plain,(
% 1.46/1.27    $false),
% 1.46/1.27    inference(trivial_inequality_removal,[status(thm)],[f27])).
% 1.46/1.27  thf(f27,plain,(
% 1.46/1.27    ($true != $true)),
% 1.46/1.27    inference(superposition,[status(thm)],[f19,f26])).
% 1.46/1.27  thf(f26,plain,(
% 1.46/1.27    ((eq @ x @ (pf @ y @ (mf @ x @ y))) = $true)),
% 1.46/1.27    inference(trivial_inequality_removal,[status(thm)],[f25])).
% 1.46/1.27  thf(f25,plain,(
% 1.46/1.27    ((eq @ x @ (pf @ y @ (mf @ x @ y))) = $true) | ($true != $true)),
% 1.46/1.27    inference(superposition,[status(thm)],[f22,f24])).
% 1.46/1.27  thf(f24,plain,(
% 1.46/1.27    ((eq @ (pf @ y @ (mf @ x @ y)) @ x) = $true)),
% 1.46/1.27    inference(trivial_inequality_removal,[status(thm)],[f23])).
% 1.46/1.27  thf(f23,plain,(
% 1.46/1.27    ($true != $true) | ((eq @ (pf @ y @ (mf @ x @ y)) @ x) = $true)),
% 1.46/1.27    inference(superposition,[status(thm)],[f21,f20])).
% 1.46/1.27  thf(f20,plain,(
% 1.46/1.27    ((moref @ x @ y) = $true)),
% 1.46/1.27    inference(cnf_transformation,[status(thm)],[f12])).
% 1.46/1.27  thf(f12,plain,(
% 1.46/1.27    ((moref @ x @ y) = $true)),
% 1.46/1.27    inference(fool_elimination,[status(thm)],[f11])).
% 1.46/1.27  thf(f11,plain,(
% 1.46/1.27    (moref @ x @ y)),
% 1.46/1.27    inference(rectify,[status(thm)],[f1])).
% 1.46/1.27  thf(f1,axiom,(
% 1.46/1.27    (moref @ x @ y)),
% 1.46/1.27    file('/export/starexec/sandbox2/tmp/tmp.WCHdhNKxgA/DTF2THF_21388.p',m)).
% 1.46/1.27  thf(f21,plain,(
% 1.46/1.27    ( ! [X0 : frac,X1 : frac] : (((moref @ X1 @ X0) != $true) | ($true = (eq @ (pf @ X0 @ (mf @ X1 @ X0)) @ X1))) )),
% 1.46/1.27    inference(cnf_transformation,[status(thm)],[f16])).
% 1.46/1.27  thf(f16,plain,(
% 1.46/1.27    ! [X0 : frac,X1 : frac] : (((moref @ X1 @ X0) != $true) | ($true = (eq @ (pf @ X0 @ (mf @ X1 @ X0)) @ X1)))),
% 1.46/1.27    inference(ennf_transformation,[status(thm)],[f14])).
% 1.46/1.27  thf(f14,plain,(
% 1.46/1.27    ! [X0 : frac,X1 : frac] : (((moref @ X1 @ X0) = $true) => ($true = (eq @ (pf @ X0 @ (mf @ X1 @ X0)) @ X1)))),
% 1.46/1.27    inference(fool_elimination,[status(thm)],[f13])).
% 1.46/1.27  thf(f13,plain,(
% 1.46/1.27    ! [X0 : frac,X1 : frac] : ((moref @ X1 @ X0) => (eq @ (pf @ X0 @ (mf @ X1 @ X0)) @ X1))),
% 1.46/1.27    inference(rectify,[status(thm)],[f3])).
% 1.46/1.27  thf(f3,axiom,(
% 1.46/1.27    ! [X1 : frac,X0 : frac] : ((moref @ X0 @ X1) => (eq @ (pf @ X1 @ (mf @ X0 @ X1)) @ X0))),
% 1.46/1.27    file('/export/starexec/sandbox2/tmp/tmp.WCHdhNKxgA/DTF2THF_21388.p',satz67c)).
% 1.46/1.27  thf(f22,plain,(
% 1.46/1.27    ( ! [X0 : frac,X1 : frac] : (((eq @ X0 @ X1) != $true) | ((eq @ X1 @ X0) = $true)) )),
% 1.46/1.27    inference(cnf_transformation,[status(thm)],[f18])).
% 1.46/1.27  thf(f18,plain,(
% 1.46/1.27    ! [X0 : frac,X1 : frac] : (((eq @ X1 @ X0) = $true) | ((eq @ X0 @ X1) != $true))),
% 1.46/1.27    inference(rectify,[status(thm)],[f17])).
% 1.46/1.27  thf(f17,plain,(
% 1.46/1.27    ! [X1 : frac,X0 : frac] : (((eq @ X0 @ X1) = $true) | ((eq @ X1 @ X0) != $true))),
% 1.46/1.27    inference(ennf_transformation,[status(thm)],[f10])).
% 1.46/1.27  thf(f10,plain,(
% 1.46/1.27    ! [X0 : frac,X1 : frac] : (((eq @ X1 @ X0) = $true) => ((eq @ X0 @ X1) = $true))),
% 1.46/1.27    inference(fool_elimination,[status(thm)],[f9])).
% 1.46/1.27  thf(f9,plain,(
% 1.46/1.27    ! [X0 : frac,X1 : frac] : ((eq @ X1 @ X0) => (eq @ X0 @ X1))),
% 1.46/1.27    inference(rectify,[status(thm)],[f2])).
% 1.46/1.27  thf(f2,axiom,(
% 1.46/1.27    ! [X1 : frac,X0 : frac] : ((eq @ X0 @ X1) => (eq @ X1 @ X0))),
% 1.46/1.27    file('/export/starexec/sandbox2/tmp/tmp.WCHdhNKxgA/DTF2THF_21388.p',satz38)).
% 1.46/1.27  thf(f19,plain,(
% 1.46/1.27    ((eq @ x @ (pf @ y @ (mf @ x @ y))) != $true)),
% 1.46/1.27    inference(cnf_transformation,[status(thm)],[f15])).
% 1.46/1.27  thf(f15,plain,(
% 1.46/1.27    ((eq @ x @ (pf @ y @ (mf @ x @ y))) != $true)),
% 1.46/1.27    inference(flattening,[status(thm)],[f8])).
% 1.46/1.27  thf(f8,plain,(
% 1.46/1.27    ~((eq @ x @ (pf @ y @ (mf @ x @ y))) = $true)),
% 1.46/1.27    inference(fool_elimination,[status(thm)],[f7])).
% 1.46/1.27  thf(f7,plain,(
% 1.46/1.27    ~(eq @ x @ (pf @ y @ (mf @ x @ y)))),
% 1.46/1.27    inference(rectify,[status(thm)],[f5])).
% 1.46/1.27  thf(f5,negated_conjecture,(
% 1.46/1.27    ~(eq @ x @ (pf @ y @ (mf @ x @ y)))),
% 1.46/1.27    inference(negated_conjecture,[status(cth)],[f4])).
% 1.46/1.27  thf(f4,conjecture,(
% 1.46/1.27    (eq @ x @ (pf @ y @ (mf @ x @ y)))),
% 1.46/1.27    file('/export/starexec/sandbox2/tmp/tmp.WCHdhNKxgA/DTF2THF_21388.p',satz67d)).
% 1.46/1.27  % SZS output end Proof for DTF2THF_21388
% 1.46/1.27  % (21504)------------------------------
% 1.46/1.27  % (21504)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.46/1.27  % (21504)Termination reason: Refutation
% 1.46/1.27  
% 1.46/1.27  % (21504)Memory used [KB]: 5500
% 1.46/1.27  % (21504)Time elapsed: 0.003 s
% 1.46/1.27  % (21504)Instructions burned: 3 (million)
% 1.46/1.27  % (21504)------------------------------
% 1.46/1.27  % (21504)------------------------------
% 1.46/1.27  % (21499)Success in time 0.004 s
%------------------------------------------------------------------------------