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LEO-II---2.3.1.THM-CRf.s

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%------------------------------------------------------------------------------
% File     : LEO-II---2.3.1
% Problem  : NUN025^2 : TPTP v9.3.1. Released v6.4.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox2/solver/bin/eprover /export/starexec/sandbox2/benchmark/theBenchmark.p

% Computer : n026.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8046.5625MB
% OS       : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit  : 300s
% DateTime : Wed Oct  7 10:35:55 AM UTC 2026

% Result   : Theorem 0.08s 0.23s
% Output   : CNFRefutation 0.08s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   20
%            Number of leaves      :    1
% Syntax   : Number of formulae    :   68 (  45 unt;   0 typ;   0 def)
%            Number of atoms       :  352 ( 214 equ;   0 cnn)
%            Maximal formula atoms :    7 (   5 avg)
%            Number of connectives :  542 ( 116   ~;  61   |;  21   &; 331   @)
%                                         (   0 <=>;  13  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   10 (   3 avg)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :   19 (  19   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    7 (   4 usr;   3 con; 0-3 aty)
%            Number of variables   :  146 (   0   ^; 140   !;   6   ?; 146   :)

% Comments : 
%------------------------------------------------------------------------------
thf(tp_h,type,
    h: $i > $i ).

thf(tp_ite,type,
    ite: $o > $i > $i > $i ).

thf(tp_s,type,
    s: $i > $i ).

thf(tp_zero,type,
    zero: $i ).

thf(1,conjecture,
    ( ( ! [X100: $o,U: $i,V: $i] :
          ( X100
         => ( ( ite @ X100 @ U @ V )
            = U ) )
      & ! [X100: $o,U: $i,V: $i] :
          ( ~ X100
         => ( ( ite @ X100 @ U @ V )
            = V ) )
      & ! [X: $i] :
          ( ( s @ X )
         != X )
      & ! [X: $i] :
          ( ( h @ X )
          = ( ite
            @ ( X
              = ( s @ zero ) )
            @ zero
            @ ( s @ zero ) ) ) )
   => ? [H: $i > $i] :
        ( ( ( H @ zero )
          = ( s @ zero ) )
        & ( ( H @ ( s @ zero ) )
          = zero )
        & ( ( H @ ( s @ ( s @ zero ) ) )
          = ( s @ zero ) ) ) ),
    file('/export/starexec/sandbox2/benchmark/theBenchmark.p',n10) ).

thf(2,negated_conjecture,
    ( ( ( ! [X100: $o,U: $i,V: $i] :
            ( X100
           => ( ( ite @ X100 @ U @ V )
              = U ) )
        & ! [X100: $o,U: $i,V: $i] :
            ( ~ X100
           => ( ( ite @ X100 @ U @ V )
              = V ) )
        & ! [X: $i] :
            ( ( s @ X )
           != X )
        & ! [X: $i] :
            ( ( h @ X )
            = ( ite
              @ ( X
                = ( s @ zero ) )
              @ zero
              @ ( s @ zero ) ) ) )
     => ? [H: $i > $i] :
          ( ( ( H @ zero )
            = ( s @ zero ) )
          & ( ( H @ ( s @ zero ) )
            = zero )
          & ( ( H @ ( s @ ( s @ zero ) ) )
            = ( s @ zero ) ) ) )
    = $false ),
    inference(negate_conjecture,[status(cth)],[1]) ).

thf(3,plain,
    ( ( ( ! [X100: $o,U: $i,V: $i] :
            ( X100
           => ( ( ite @ X100 @ U @ V )
              = U ) )
        & ! [X100: $o,U: $i,V: $i] :
            ( ~ X100
           => ( ( ite @ X100 @ U @ V )
              = V ) )
        & ! [X: $i] :
            ( ( s @ X )
           != X )
        & ! [X: $i] :
            ( ( h @ X )
            = ( ite
              @ ( X
                = ( s @ zero ) )
              @ zero
              @ ( s @ zero ) ) ) )
     => ? [H: $i > $i] :
          ( ( ( H @ zero )
            = ( s @ zero ) )
          & ( ( H @ ( s @ zero ) )
            = zero )
          & ( ( H @ ( s @ ( s @ zero ) ) )
            = ( s @ zero ) ) ) )
    = $false ),
    inference(unfold_def,[status(thm)],[2]) ).

thf(4,plain,
    ( ( ! [X100: $o,U: $i,V: $i] :
          ( X100
         => ( ( ite @ X100 @ U @ V )
            = U ) ) )
    = $true ),
    inference(standard_cnf,[status(thm)],[3]) ).

thf(5,plain,
    ( ( ! [X100: $o,U: $i,V: $i] :
          ( ~ X100
         => ( ( ite @ X100 @ U @ V )
            = V ) ) )
    = $true ),
    inference(standard_cnf,[status(thm)],[3]) ).

thf(6,plain,
    ( ( ! [X: $i] :
          ( ( s @ X )
         != X ) )
    = $true ),
    inference(standard_cnf,[status(thm)],[3]) ).

thf(7,plain,
    ( ( ! [X: $i] :
          ( ( h @ X )
          = ( ite
            @ ( X
              = ( s @ zero ) )
            @ zero
            @ ( s @ zero ) ) ) )
    = $true ),
    inference(standard_cnf,[status(thm)],[3]) ).

thf(8,plain,
    ( ( ? [H: $i > $i] :
          ( ( ( H @ zero )
            = ( s @ zero ) )
          & ( ( H @ ( s @ zero ) )
            = zero )
          & ( ( H @ ( s @ ( s @ zero ) ) )
            = ( s @ zero ) ) ) )
    = $false ),
    inference(standard_cnf,[status(thm)],[3]) ).

thf(9,plain,
    ( ( ~ ? [H: $i > $i] :
            ( ( ( H @ zero )
              = ( s @ zero ) )
            & ( ( H @ ( s @ zero ) )
              = zero )
            & ( ( H @ ( s @ ( s @ zero ) ) )
              = ( s @ zero ) ) ) )
    = $true ),
    inference(polarity_switch,[status(thm)],[8]) ).

thf(10,plain,
    ( ( ! [X: $i] :
          ( ( h @ X )
          = ( ite
            @ ( X
              = ( s @ zero ) )
            @ zero
            @ ( s @ zero ) ) ) )
    = $true ),
    inference(copy,[status(thm)],[7]) ).

thf(11,plain,
    ( ( ! [X: $i] :
          ( ( s @ X )
         != X ) )
    = $true ),
    inference(copy,[status(thm)],[6]) ).

thf(12,plain,
    ( ( ! [X100: $o,U: $i,V: $i] :
          ( ~ X100
         => ( ( ite @ X100 @ U @ V )
            = V ) ) )
    = $true ),
    inference(copy,[status(thm)],[5]) ).

thf(13,plain,
    ( ( ! [X100: $o,U: $i,V: $i] :
          ( X100
         => ( ( ite @ X100 @ U @ V )
            = U ) ) )
    = $true ),
    inference(copy,[status(thm)],[4]) ).

thf(14,plain,
    ( ( ~ ? [H: $i > $i] :
            ( ( ( H @ zero )
              = ( s @ zero ) )
            & ( ( H @ ( s @ zero ) )
              = zero )
            & ( ( H @ ( s @ ( s @ zero ) ) )
              = ( s @ zero ) ) ) )
    = $true ),
    inference(copy,[status(thm)],[9]) ).

thf(15,plain,
    ( ( ~ ~ ! [SX0: $i > $i] :
              ~ ~ ( ~ ~ ( ( ( SX0 @ zero )
                         != ( s @ zero ) )
                        | ( ( SX0 @ ( s @ zero ) )
                         != zero ) )
                  | ( ( SX0 @ ( s @ ( s @ zero ) ) )
                   != ( s @ zero ) ) ) )
    = $true ),
    inference(unfold_def,[status(thm)],[14]) ).

thf(16,plain,
    ( ( ! [SX0: $o,SX1: $i,SX2: $i] :
          ( ~ SX0
          | ( ( ite @ SX0 @ SX1 @ SX2 )
            = SX1 ) ) )
    = $true ),
    inference(unfold_def,[status(thm)],[13]) ).

thf(17,plain,
    ( ( ! [SX0: $o,SX1: $i,SX2: $i] :
          ( ~ ~ SX0
          | ( ( ite @ SX0 @ SX1 @ SX2 )
            = SX2 ) ) )
    = $true ),
    inference(unfold_def,[status(thm)],[12]) ).

thf(18,plain,
    ( ( ! [SX0: $i] :
          ( ( s @ SX0 )
         != SX0 ) )
    = $true ),
    inference(unfold_def,[status(thm)],[11]) ).

thf(19,plain,
    ! [SV1: $i] :
      ( ( ( h @ SV1 )
        = ( ite
          @ ( SV1
            = ( s @ zero ) )
          @ zero
          @ ( s @ zero ) ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[10]) ).

thf(20,plain,
    ( ( ~ ! [SX0: $i > $i] :
            ~ ~ ( ~ ~ ( ( ( SX0 @ zero )
                       != ( s @ zero ) )
                      | ( ( SX0 @ ( s @ zero ) )
                       != zero ) )
                | ( ( SX0 @ ( s @ ( s @ zero ) ) )
                 != ( s @ zero ) ) ) )
    = $false ),
    inference(extcnf_not_pos,[status(thm)],[15]) ).

thf(21,plain,
    ! [SV2: $o] :
      ( ( ! [SY9: $i,SY10: $i] :
            ( ~ SV2
            | ( ( ite @ SV2 @ SY9 @ SY10 )
              = SY9 ) ) )
      = $true ),
    inference(extcnf_forall_special_pos,[status(thm)],[16]) ).

thf(22,plain,
    ( ( ! [SX0: $i,SX1: $i] :
          ( ~ $true
          | ( ( ite @ $true @ SX0 @ SX1 )
            = SX0 ) ) )
    = $true ),
    inference(extcnf_forall_special_pos,[status(thm)],[16]) ).

thf(23,plain,
    ( ( ! [SX0: $i,SX1: $i] :
          ( ~ $false
          | ( ( ite @ $false @ SX0 @ SX1 )
            = SX0 ) ) )
    = $true ),
    inference(extcnf_forall_special_pos,[status(thm)],[16]) ).

thf(24,plain,
    ! [SV3: $o] :
      ( ( ! [SY11: $i,SY12: $i] :
            ( ~ ~ SV3
            | ( ( ite @ SV3 @ SY11 @ SY12 )
              = SY12 ) ) )
      = $true ),
    inference(extcnf_forall_special_pos,[status(thm)],[17]) ).

thf(25,plain,
    ( ( ! [SX0: $i,SX1: $i] :
          ( ~ ~ $true
          | ( ( ite @ $true @ SX0 @ SX1 )
            = SX1 ) ) )
    = $true ),
    inference(extcnf_forall_special_pos,[status(thm)],[17]) ).

thf(26,plain,
    ( ( ! [SX0: $i,SX1: $i] :
          ( ~ ~ $false
          | ( ( ite @ $false @ SX0 @ SX1 )
            = SX1 ) ) )
    = $true ),
    inference(extcnf_forall_special_pos,[status(thm)],[17]) ).

thf(27,plain,
    ! [SV4: $i] :
      ( ( ( s @ SV4 )
       != SV4 )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[18]) ).

thf(28,plain,
    ( ( ! [SX0: $i > $i] :
          ~ ~ ( ~ ~ ( ( ( SX0 @ zero )
                     != ( s @ zero ) )
                    | ( ( SX0 @ ( s @ zero ) )
                     != zero ) )
              | ( ( SX0 @ ( s @ ( s @ zero ) ) )
               != ( s @ zero ) ) ) )
    = $true ),
    inference(extcnf_not_neg,[status(thm)],[20]) ).

thf(29,plain,
    ! [SV5: $i,SV2: $o] :
      ( ( ! [SY13: $i] :
            ( ~ SV2
            | ( ( ite @ SV2 @ SV5 @ SY13 )
              = SV5 ) ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[21]) ).

thf(30,plain,
    ! [SV6: $i] :
      ( ( ! [SY14: $i] :
            ( ~ $true
            | ( ( ite @ $true @ SV6 @ SY14 )
              = SV6 ) ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[22]) ).

thf(31,plain,
    ! [SV7: $i] :
      ( ( ! [SY15: $i] :
            ( ~ $false
            | ( ( ite @ $false @ SV7 @ SY15 )
              = SV7 ) ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[23]) ).

thf(32,plain,
    ! [SV8: $i,SV3: $o] :
      ( ( ! [SY16: $i] :
            ( ~ ~ SV3
            | ( ( ite @ SV3 @ SV8 @ SY16 )
              = SY16 ) ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[24]) ).

thf(33,plain,
    ! [SV9: $i] :
      ( ( ! [SY17: $i] :
            ( ~ ~ $true
            | ( ( ite @ $true @ SV9 @ SY17 )
              = SY17 ) ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[25]) ).

thf(34,plain,
    ! [SV10: $i] :
      ( ( ! [SY18: $i] :
            ( ~ ~ $false
            | ( ( ite @ $false @ SV10 @ SY18 )
              = SY18 ) ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[26]) ).

thf(35,plain,
    ! [SV4: $i] :
      ( ( ( s @ SV4 )
        = SV4 )
      = $false ),
    inference(extcnf_not_pos,[status(thm)],[27]) ).

thf(36,plain,
    ! [SV11: $i > $i] :
      ( ( ~ ~ ( ~ ~ ( ( ( SV11 @ zero )
                     != ( s @ zero ) )
                    | ( ( SV11 @ ( s @ zero ) )
                     != zero ) )
              | ( ( SV11 @ ( s @ ( s @ zero ) ) )
               != ( s @ zero ) ) ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[28]) ).

thf(37,plain,
    ! [SV12: $i,SV5: $i,SV2: $o] :
      ( ( ~ SV2
        | ( ( ite @ SV2 @ SV5 @ SV12 )
          = SV5 ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[29]) ).

thf(38,plain,
    ! [SV13: $i,SV6: $i] :
      ( ( ~ $true
        | ( ( ite @ $true @ SV6 @ SV13 )
          = SV6 ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[30]) ).

thf(39,plain,
    ! [SV14: $i,SV7: $i] :
      ( ( ~ $false
        | ( ( ite @ $false @ SV7 @ SV14 )
          = SV7 ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[31]) ).

thf(40,plain,
    ! [SV15: $i,SV8: $i,SV3: $o] :
      ( ( ~ ~ SV3
        | ( ( ite @ SV3 @ SV8 @ SV15 )
          = SV15 ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[32]) ).

thf(41,plain,
    ! [SV16: $i,SV9: $i] :
      ( ( ~ ~ $true
        | ( ( ite @ $true @ SV9 @ SV16 )
          = SV16 ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[33]) ).

thf(42,plain,
    ! [SV17: $i,SV10: $i] :
      ( ( ~ ~ $false
        | ( ( ite @ $false @ SV10 @ SV17 )
          = SV17 ) )
      = $true ),
    inference(extcnf_forall_pos,[status(thm)],[34]) ).

thf(43,plain,
    ! [SV11: $i > $i] :
      ( ( ~ ( ~ ~ ( ( ( SV11 @ zero )
                   != ( s @ zero ) )
                  | ( ( SV11 @ ( s @ zero ) )
                   != zero ) )
            | ( ( SV11 @ ( s @ ( s @ zero ) ) )
             != ( s @ zero ) ) ) )
      = $false ),
    inference(extcnf_not_pos,[status(thm)],[36]) ).

thf(44,plain,
    ! [SV12: $i,SV5: $i,SV2: $o] :
      ( ( ( ~ SV2 ) = $true )
      | ( ( ( ite @ SV2 @ SV5 @ SV12 )
          = SV5 )
        = $true ) ),
    inference(extcnf_or_pos,[status(thm)],[37]) ).

thf(45,plain,
    ! [SV13: $i,SV6: $i] :
      ( ( ( ~ $true ) = $true )
      | ( ( ( ite @ $true @ SV6 @ SV13 )
          = SV6 )
        = $true ) ),
    inference(extcnf_or_pos,[status(thm)],[38]) ).

thf(46,plain,
    ! [SV14: $i,SV7: $i] :
      ( ( ( ~ $false ) = $true )
      | ( ( ( ite @ $false @ SV7 @ SV14 )
          = SV7 )
        = $true ) ),
    inference(extcnf_or_pos,[status(thm)],[39]) ).

thf(47,plain,
    ! [SV15: $i,SV8: $i,SV3: $o] :
      ( ( ( ~ ~ SV3 )
        = $true )
      | ( ( ( ite @ SV3 @ SV8 @ SV15 )
          = SV15 )
        = $true ) ),
    inference(extcnf_or_pos,[status(thm)],[40]) ).

thf(48,plain,
    ! [SV16: $i,SV9: $i] :
      ( ( ( ~ ~ $true )
        = $true )
      | ( ( ( ite @ $true @ SV9 @ SV16 )
          = SV16 )
        = $true ) ),
    inference(extcnf_or_pos,[status(thm)],[41]) ).

thf(49,plain,
    ! [SV17: $i,SV10: $i] :
      ( ( ( ~ ~ $false )
        = $true )
      | ( ( ( ite @ $false @ SV10 @ SV17 )
          = SV17 )
        = $true ) ),
    inference(extcnf_or_pos,[status(thm)],[42]) ).

thf(50,plain,
    ! [SV11: $i > $i] :
      ( ( ~ ~ ( ( ( SV11 @ zero )
               != ( s @ zero ) )
              | ( ( SV11 @ ( s @ zero ) )
               != zero ) )
        | ( ( SV11 @ ( s @ ( s @ zero ) ) )
         != ( s @ zero ) ) )
      = $true ),
    inference(extcnf_not_neg,[status(thm)],[43]) ).

thf(51,plain,
    ! [SV12: $i,SV5: $i,SV2: $o] :
      ( ( SV2 = $false )
      | ( ( ( ite @ SV2 @ SV5 @ SV12 )
          = SV5 )
        = $true ) ),
    inference(extcnf_not_pos,[status(thm)],[44]) ).

thf(52,plain,
    ! [SV13: $i,SV6: $i] :
      ( ( $true = $false )
      | ( ( ( ite @ $true @ SV6 @ SV13 )
          = SV6 )
        = $true ) ),
    inference(extcnf_not_pos,[status(thm)],[45]) ).

thf(53,plain,
    ! [SV14: $i,SV7: $i] :
      ( ( $false = $false )
      | ( ( ( ite @ $false @ SV7 @ SV14 )
          = SV7 )
        = $true ) ),
    inference(extcnf_not_pos,[status(thm)],[46]) ).

thf(54,plain,
    ! [SV15: $i,SV8: $i,SV3: $o] :
      ( ( ( ~ SV3 ) = $false )
      | ( ( ( ite @ SV3 @ SV8 @ SV15 )
          = SV15 )
        = $true ) ),
    inference(extcnf_not_pos,[status(thm)],[47]) ).

thf(55,plain,
    ! [SV16: $i,SV9: $i] :
      ( ( ( ~ $true ) = $false )
      | ( ( ( ite @ $true @ SV9 @ SV16 )
          = SV16 )
        = $true ) ),
    inference(extcnf_not_pos,[status(thm)],[48]) ).

thf(56,plain,
    ! [SV17: $i,SV10: $i] :
      ( ( ( ~ $false ) = $false )
      | ( ( ( ite @ $false @ SV10 @ SV17 )
          = SV17 )
        = $true ) ),
    inference(extcnf_not_pos,[status(thm)],[49]) ).

thf(57,plain,
    ! [SV11: $i > $i] :
      ( ( ( ~ ~ ( ( ( SV11 @ zero )
                 != ( s @ zero ) )
                | ( ( SV11 @ ( s @ zero ) )
                 != zero ) ) )
        = $true )
      | ( ( ( SV11 @ ( s @ ( s @ zero ) ) )
         != ( s @ zero ) )
        = $true ) ),
    inference(extcnf_or_pos,[status(thm)],[50]) ).

thf(58,plain,
    ! [SV15: $i,SV8: $i,SV3: $o] :
      ( ( SV3 = $true )
      | ( ( ( ite @ SV3 @ SV8 @ SV15 )
          = SV15 )
        = $true ) ),
    inference(extcnf_not_neg,[status(thm)],[54]) ).

thf(59,plain,
    ! [SV16: $i,SV9: $i] :
      ( ( $true = $true )
      | ( ( ( ite @ $true @ SV9 @ SV16 )
          = SV16 )
        = $true ) ),
    inference(extcnf_not_neg,[status(thm)],[55]) ).

thf(60,plain,
    ! [SV17: $i,SV10: $i] :
      ( ( $false = $true )
      | ( ( ( ite @ $false @ SV10 @ SV17 )
          = SV17 )
        = $true ) ),
    inference(extcnf_not_neg,[status(thm)],[56]) ).

thf(61,plain,
    ! [SV11: $i > $i] :
      ( ( ( ~ ( ( ( SV11 @ zero )
               != ( s @ zero ) )
              | ( ( SV11 @ ( s @ zero ) )
               != zero ) ) )
        = $false )
      | ( ( ( SV11 @ ( s @ ( s @ zero ) ) )
         != ( s @ zero ) )
        = $true ) ),
    inference(extcnf_not_pos,[status(thm)],[57]) ).

thf(62,plain,
    ! [SV11: $i > $i] :
      ( ( ( ( ( SV11 @ zero )
           != ( s @ zero ) )
          | ( ( SV11 @ ( s @ zero ) )
           != zero ) )
        = $true )
      | ( ( ( SV11 @ ( s @ ( s @ zero ) ) )
         != ( s @ zero ) )
        = $true ) ),
    inference(extcnf_not_neg,[status(thm)],[61]) ).

thf(63,plain,
    ! [SV11: $i > $i] :
      ( ( ( ( SV11 @ zero )
         != ( s @ zero ) )
        = $true )
      | ( ( ( SV11 @ ( s @ zero ) )
         != zero )
        = $true )
      | ( ( ( SV11 @ ( s @ ( s @ zero ) ) )
         != ( s @ zero ) )
        = $true ) ),
    inference(extcnf_or_pos,[status(thm)],[62]) ).

thf(64,plain,
    ! [SV11: $i > $i] :
      ( ( ( ( SV11 @ zero )
          = ( s @ zero ) )
        = $false )
      | ( ( ( SV11 @ ( s @ zero ) )
         != zero )
        = $true )
      | ( ( ( SV11 @ ( s @ ( s @ zero ) ) )
         != ( s @ zero ) )
        = $true ) ),
    inference(extcnf_not_pos,[status(thm)],[63]) ).

thf(65,plain,
    ! [SV11: $i > $i] :
      ( ( ( ( SV11 @ ( s @ zero ) )
          = zero )
        = $false )
      | ( ( ( SV11 @ zero )
          = ( s @ zero ) )
        = $false )
      | ( ( ( SV11 @ ( s @ ( s @ zero ) ) )
         != ( s @ zero ) )
        = $true ) ),
    inference(extcnf_not_pos,[status(thm)],[64]) ).

thf(66,plain,
    ! [SV11: $i > $i] :
      ( ( ( ( SV11 @ ( s @ ( s @ zero ) ) )
          = ( s @ zero ) )
        = $false )
      | ( ( ( SV11 @ zero )
          = ( s @ zero ) )
        = $false )
      | ( ( ( SV11 @ ( s @ zero ) )
          = zero )
        = $false ) ),
    inference(extcnf_not_pos,[status(thm)],[65]) ).

thf(67,plain,
    $false = $true,
    inference(fo_atp_e,[status(thm)],[19,66,60,59,58,53,52,51,35]) ).

thf(68,plain,
    $false,
    inference(solved_all_splits,[solved_all_splits(join,[])],[67]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03  % Problem  : NUN025^2 : TPTP v9.3.1. Released v6.4.0.
% 0.00/0.04  % Command  : leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox2/solver/bin/eprover /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.08/0.18  % Computer : n026.cluster.edu
% 0.08/0.18  % Model    : x86_64 x86_64
% 0.08/0.18  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.08/0.18  % Memory   : 8046.5625MB
% 0.08/0.18  % OS       : Linux 6.8.0-71-generic
% 0.08/0.18  % CPULimit : 300
% 0.08/0.18  % WCLimit  : 300
% 0.08/0.18  % DateTime : Tue Oct  6 13:49:02 UTC 2026
% 0.08/0.18  % CPUTime  : 
% 0.08/0.18  Running leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox2/solver/bin/eprover /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.08/0.23  
% 0.08/0.23   No.of.Axioms: 0
% 0.08/0.23  
% 0.08/0.23   Length.of.Defs: 0
% 0.08/0.23  
% 0.08/0.23   Contains.Choice.Funs: false
% 0.08/0.23  .
% 0.08/0.23  
% 0.08/0.23  ********************************
% 0.08/0.23  *   All subproblems solved!    *
% 0.08/0.23  ********************************
% 0.08/0.23  % SZS status Theorem for /export/starexec/sandbox2/benchmark/theBenchmark.p : (rf:1,axioms:4,ps:0,u:6,ude:true,rLeibEQ:true,rAndEQ:true,use_choice:true,use_extuni:true,use_extcnf_combined:false,expand_extuni:false,foatp:e,atp_timeout:25,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:67,loop_count:0,foatp_calls:1,translation:fof_full)
% 0.08/0.23  
% 0.08/0.23  %**** Beginning of derivation protocol ****
% 0.08/0.23  % SZS output start CNFRefutation
% See solution above
% 0.08/0.23  
% 0.08/0.23  %**** End of derivation protocol ****
% 0.08/0.23  %**** no. of clauses in derivation: 68 ****
% 0.08/0.23  %**** clause counter: 67 ****
% 0.08/0.23  
% 0.08/0.23  % SZS status Theorem for /export/starexec/sandbox2/benchmark/theBenchmark.p : (rf:1,axioms:4,ps:0,u:6,ude:true,rLeibEQ:true,rAndEQ:true,use_choice:true,use_extuni:true,use_extcnf_combined:false,expand_extuni:false,foatp:e,atp_timeout:25,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:67,loop_count:0,foatp_calls:1,translation:fof_full)
%------------------------------------------------------------------------------