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Z3---4.15.1.UNS-Prf.s

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%------------------------------------------------------------------------------
% File     : Z3---4.15.1
% Problem  : SWC372-1 : TPTP v9.0.0. Released v2.4.0.
% Transfm  : none
% Format   : tptp
% Command  : run_E %s %d THM

% Computer : n014.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 : Sat Jun 21 05:31:03 AM UTC 2025

% Result   : Unsatisfiable 0.19s 0.43s
% Output   : Proof 0.19s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   11
%            Number of leaves      :   31
% Syntax   : Number of formulae    :   69 (  27 unt;   0 typ;   0 def)
%            Number of atoms       :  423 (  35 equ)
%            Maximal formula atoms :   23 (   6 avg)
%            Number of connectives :  640 ( 314   ~; 287   |;   0   &)
%                                         (  39 <=>;   0  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   14 (   5 avg)
%            Maximal term depth    :    3 (   1 avg)
%            Number of FOOLs       :   28 (  28 fml;   0 var)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :    0 (   0   >;   0   *;   0   +;   0  <<)
%            Number of predicates  :    8 (   6 usr;   1 prp; 0-3 aty)
%            Number of functors    :    7 (   7 usr;   6 con; 0-2 aty)
%            Number of variables   :  110 ( 100   !;   0   ?; 110   :)

% Comments : 
%------------------------------------------------------------------------------
tff(segmentP_type,type,
    segmentP: ( $i * $i ) > $o ).

tff(sk3_type,type,
    sk3: $i ).

tff(app_type,type,
    app: ( $i * $i ) > $i ).

tff(sk5_type,type,
    sk5: $i ).

tff(nil_type,type,
    nil: $i ).

tff(sk1_type,type,
    sk1: $i ).

tff(sk2_type,type,
    sk2: $i ).

tff(sk4_type,type,
    sk4: $i ).

tff(ssList_type,type,
    ssList: $i > $o ).

tff(1,plain,
    ( ( sk1 = sk3 )
  <=> ( sk1 = sk3 ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(2,axiom,
    sk1 = sk3,
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_6) ).

tff(3,plain,
    sk1 = sk3,
    inference(modus_ponens,[status(thm)],[2,1]) ).

tff(4,plain,
    sk3 = sk1,
    inference(symmetry,[status(thm)],[3]) ).

tff(5,plain,
    ( ( sk2 = sk4 )
  <=> ( sk2 = sk4 ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(6,axiom,
    sk2 = sk4,
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_5) ).

tff(7,plain,
    sk2 = sk4,
    inference(modus_ponens,[status(thm)],[6,5]) ).

tff(8,plain,
    sk4 = sk2,
    inference(symmetry,[status(thm)],[7]) ).

tff(9,plain,
    ( ( app(sk3,sk5) = sk4 )
  <=> ( app(sk3,sk5) = sk4 ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(10,axiom,
    app(sk3,sk5) = sk4,
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_8) ).

tff(11,plain,
    app(sk3,sk5) = sk4,
    inference(modus_ponens,[status(thm)],[10,9]) ).

tff(12,plain,
    ( ssList(sk3)
  <=> ssList(sk3) ),
    inference(rewrite,[status(thm)],[]) ).

tff(13,axiom,
    ssList(sk3),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_3) ).

tff(14,plain,
    ssList(sk3),
    inference(modus_ponens,[status(thm)],[13,12]) ).

tff(15,plain,
    ^ [U: $i] :
      refl(( ( ~ ssList(U)
          | ( app(nil,U) = U ) )
      <=> ( ~ ssList(U)
          | ( app(nil,U) = U ) ) )),
    inference(bind,[status(th)],[]) ).

tff(16,plain,
    ( ! [U: $i] :
        ( ~ ssList(U)
        | ( app(nil,U) = U ) )
  <=> ! [U: $i] :
        ( ~ ssList(U)
        | ( app(nil,U) = U ) ) ),
    inference(quant_intro,[status(thm)],[15]) ).

tff(17,plain,
    ( ! [U: $i] :
        ( ~ ssList(U)
        | ( app(nil,U) = U ) )
  <=> ! [U: $i] :
        ( ~ ssList(U)
        | ( app(nil,U) = U ) ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(18,axiom,
    ! [U: $i] :
      ( ~ ssList(U)
      | ( app(nil,U) = U ) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SWC001-0.ax',clause74) ).

tff(19,plain,
    ! [U: $i] :
      ( ~ ssList(U)
      | ( app(nil,U) = U ) ),
    inference(modus_ponens,[status(thm)],[18,17]) ).

tff(20,plain,
    ! [U: $i] :
      ( ~ ssList(U)
      | ( app(nil,U) = U ) ),
    inference(skolemize,[status(sab)],[19]) ).

tff(21,plain,
    ! [U: $i] :
      ( ~ ssList(U)
      | ( app(nil,U) = U ) ),
    inference(modus_ponens,[status(thm)],[20,16]) ).

tff(22,plain,
    ( ( ~ ! [U: $i] :
            ( ~ ssList(U)
            | ( app(nil,U) = U ) )
      | ~ ssList(sk3)
      | ( app(nil,sk3) = sk3 ) )
  <=> ( ~ ! [U: $i] :
            ( ~ ssList(U)
            | ( app(nil,U) = U ) )
      | ~ ssList(sk3)
      | ( app(nil,sk3) = sk3 ) ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(23,plain,
    ( ~ ! [U: $i] :
          ( ~ ssList(U)
          | ( app(nil,U) = U ) )
    | ~ ssList(sk3)
    | ( app(nil,sk3) = sk3 ) ),
    inference(quant_inst,[status(thm)],[]) ).

tff(24,plain,
    ( ~ ! [U: $i] :
          ( ~ ssList(U)
          | ( app(nil,U) = U ) )
    | ~ ssList(sk3)
    | ( app(nil,sk3) = sk3 ) ),
    inference(modus_ponens,[status(thm)],[23,22]) ).

tff(25,plain,
    app(nil,sk3) = sk3,
    inference(unit_resolution,[status(thm)],[24,21,14]) ).

tff(26,plain,
    app(app(nil,sk3),sk5) = app(sk3,sk5),
    inference(monotonicity,[status(thm)],[25]) ).

tff(27,plain,
    app(app(nil,sk3),sk5) = sk2,
    inference(transitivity,[status(thm)],[26,11,8]) ).

tff(28,plain,
    ( segmentP(app(app(nil,sk3),sk5),sk3)
  <=> segmentP(sk2,sk1) ),
    inference(monotonicity,[status(thm)],[27,4]) ).

tff(29,plain,
    ( segmentP(sk2,sk1)
  <=> segmentP(app(app(nil,sk3),sk5),sk3) ),
    inference(symmetry,[status(thm)],[28]) ).

tff(30,plain,
    ( ~ segmentP(sk2,sk1)
  <=> ~ segmentP(app(app(nil,sk3),sk5),sk3) ),
    inference(monotonicity,[status(thm)],[29]) ).

tff(31,plain,
    ( ~ segmentP(sk2,sk1)
  <=> ~ segmentP(sk2,sk1) ),
    inference(rewrite,[status(thm)],[]) ).

tff(32,axiom,
    ~ segmentP(sk2,sk1),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_11) ).

tff(33,plain,
    ~ segmentP(sk2,sk1),
    inference(modus_ponens,[status(thm)],[32,31]) ).

tff(34,plain,
    ~ segmentP(app(app(nil,sk3),sk5),sk3),
    inference(modus_ponens,[status(thm)],[33,30]) ).

tff(35,plain,
    ^ [U: $i] :
      refl(( ( ~ ssList(U)
          | segmentP(U,U) )
      <=> ( ~ ssList(U)
          | segmentP(U,U) ) )),
    inference(bind,[status(th)],[]) ).

tff(36,plain,
    ( ! [U: $i] :
        ( ~ ssList(U)
        | segmentP(U,U) )
  <=> ! [U: $i] :
        ( ~ ssList(U)
        | segmentP(U,U) ) ),
    inference(quant_intro,[status(thm)],[35]) ).

tff(37,plain,
    ( ! [U: $i] :
        ( ~ ssList(U)
        | segmentP(U,U) )
  <=> ! [U: $i] :
        ( ~ ssList(U)
        | segmentP(U,U) ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(38,axiom,
    ! [U: $i] :
      ( ~ ssList(U)
      | segmentP(U,U) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SWC001-0.ax',clause57) ).

tff(39,plain,
    ! [U: $i] :
      ( ~ ssList(U)
      | segmentP(U,U) ),
    inference(modus_ponens,[status(thm)],[38,37]) ).

tff(40,plain,
    ! [U: $i] :
      ( ~ ssList(U)
      | segmentP(U,U) ),
    inference(skolemize,[status(sab)],[39]) ).

tff(41,plain,
    ! [U: $i] :
      ( ~ ssList(U)
      | segmentP(U,U) ),
    inference(modus_ponens,[status(thm)],[40,36]) ).

tff(42,plain,
    ( ( ~ ! [U: $i] :
            ( ~ ssList(U)
            | segmentP(U,U) )
      | ~ ssList(sk3)
      | segmentP(sk3,sk3) )
  <=> ( ~ ! [U: $i] :
            ( ~ ssList(U)
            | segmentP(U,U) )
      | ~ ssList(sk3)
      | segmentP(sk3,sk3) ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(43,plain,
    ( ~ ! [U: $i] :
          ( ~ ssList(U)
          | segmentP(U,U) )
    | ~ ssList(sk3)
    | segmentP(sk3,sk3) ),
    inference(quant_inst,[status(thm)],[]) ).

tff(44,plain,
    ( ~ ! [U: $i] :
          ( ~ ssList(U)
          | segmentP(U,U) )
    | ~ ssList(sk3)
    | segmentP(sk3,sk3) ),
    inference(modus_ponens,[status(thm)],[43,42]) ).

tff(45,plain,
    segmentP(sk3,sk3),
    inference(unit_resolution,[status(thm)],[44,41,14]) ).

tff(46,plain,
    ( ssList(sk5)
  <=> ssList(sk5) ),
    inference(rewrite,[status(thm)],[]) ).

tff(47,axiom,
    ssList(sk5),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_7) ).

tff(48,plain,
    ssList(sk5),
    inference(modus_ponens,[status(thm)],[47,46]) ).

tff(49,plain,
    ^ [W: $i,V: $i,U: $i,X: $i] :
      refl(( ( ~ ssList(X)
          | ~ ssList(U)
          | ~ ssList(V)
          | ~ segmentP(U,V)
          | segmentP(app(app(X,U),W),V)
          | ~ ssList(W) )
      <=> ( ~ ssList(X)
          | ~ ssList(U)
          | ~ ssList(V)
          | ~ segmentP(U,V)
          | segmentP(app(app(X,U),W),V)
          | ~ ssList(W) ) )),
    inference(bind,[status(th)],[]) ).

tff(50,plain,
    ( ! [W: $i,V: $i,U: $i,X: $i] :
        ( ~ ssList(X)
        | ~ ssList(U)
        | ~ ssList(V)
        | ~ segmentP(U,V)
        | segmentP(app(app(X,U),W),V)
        | ~ ssList(W) )
  <=> ! [W: $i,V: $i,U: $i,X: $i] :
        ( ~ ssList(X)
        | ~ ssList(U)
        | ~ ssList(V)
        | ~ segmentP(U,V)
        | segmentP(app(app(X,U),W),V)
        | ~ ssList(W) ) ),
    inference(quant_intro,[status(thm)],[49]) ).

tff(51,plain,
    ( ! [W: $i,V: $i,U: $i,X: $i] :
        ( ~ ssList(X)
        | ~ ssList(U)
        | ~ ssList(V)
        | ~ segmentP(U,V)
        | segmentP(app(app(X,U),W),V)
        | ~ ssList(W) )
  <=> ! [W: $i,V: $i,U: $i,X: $i] :
        ( ~ ssList(X)
        | ~ ssList(U)
        | ~ ssList(V)
        | ~ segmentP(U,V)
        | segmentP(app(app(X,U),W),V)
        | ~ ssList(W) ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(52,plain,
    ^ [W: $i,V: $i,U: $i,X: $i] :
      trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(rewrite(( ( ~ segmentP(U,V)
                          | ~ ssList(W) )
                      <=> ( ~ segmentP(U,V)
                          | ~ ssList(W) ) )),
                      ( ( ~ segmentP(U,V)
                        | ~ ssList(W)
                        | ~ ssList(X) )
                    <=> ( ~ segmentP(U,V)
                        | ~ ssList(W)
                        | ~ ssList(X) ) )),
                    rewrite(( ( ~ segmentP(U,V)
                        | ~ ssList(W)
                        | ~ ssList(X) )
                    <=> ( ~ ssList(X)
                        | ~ segmentP(U,V)
                        | ~ ssList(W) ) )),
                    ( ( ~ segmentP(U,V)
                      | ~ ssList(W)
                      | ~ ssList(X) )
                  <=> ( ~ ssList(X)
                      | ~ segmentP(U,V)
                      | ~ ssList(W) ) )),
                  ( ( ~ segmentP(U,V)
                    | ~ ssList(W)
                    | ~ ssList(X)
                    | ~ ssList(V) )
                <=> ( ~ ssList(X)
                    | ~ segmentP(U,V)
                    | ~ ssList(W)
                    | ~ ssList(V) ) )),
                rewrite(( ( ~ ssList(X)
                    | ~ segmentP(U,V)
                    | ~ ssList(W)
                    | ~ ssList(V) )
                <=> ( ~ ssList(X)
                    | ~ ssList(V)
                    | ~ segmentP(U,V)
                    | ~ ssList(W) ) )),
                ( ( ~ segmentP(U,V)
                  | ~ ssList(W)
                  | ~ ssList(X)
                  | ~ ssList(V) )
              <=> ( ~ ssList(X)
                  | ~ ssList(V)
                  | ~ segmentP(U,V)
                  | ~ ssList(W) ) )),
              ( ( ~ segmentP(U,V)
                | ~ ssList(W)
                | ~ ssList(X)
                | ~ ssList(V)
                | ~ ssList(U) )
            <=> ( ~ ssList(X)
                | ~ ssList(V)
                | ~ segmentP(U,V)
                | ~ ssList(W)
                | ~ ssList(U) ) )),
            rewrite(( ( ~ ssList(X)
                | ~ ssList(V)
                | ~ segmentP(U,V)
                | ~ ssList(W)
                | ~ ssList(U) )
            <=> ( ~ ssList(X)
                | ~ ssList(U)
                | ~ ssList(V)
                | ~ segmentP(U,V)
                | ~ ssList(W) ) )),
            ( ( ~ segmentP(U,V)
              | ~ ssList(W)
              | ~ ssList(X)
              | ~ ssList(V)
              | ~ ssList(U) )
          <=> ( ~ ssList(X)
              | ~ ssList(U)
              | ~ ssList(V)
              | ~ segmentP(U,V)
              | ~ ssList(W) ) )),
          ( ( ~ segmentP(U,V)
            | ~ ssList(W)
            | ~ ssList(X)
            | ~ ssList(V)
            | ~ ssList(U)
            | segmentP(app(app(X,U),W),V) )
        <=> ( ~ ssList(X)
            | ~ ssList(U)
            | ~ ssList(V)
            | ~ segmentP(U,V)
            | ~ ssList(W)
            | segmentP(app(app(X,U),W),V) ) )),
        rewrite(( ( ~ ssList(X)
            | ~ ssList(U)
            | ~ ssList(V)
            | ~ segmentP(U,V)
            | ~ ssList(W)
            | segmentP(app(app(X,U),W),V) )
        <=> ( ~ ssList(X)
            | ~ ssList(U)
            | ~ ssList(V)
            | ~ segmentP(U,V)
            | segmentP(app(app(X,U),W),V)
            | ~ ssList(W) ) )),
        ( ( ~ segmentP(U,V)
          | ~ ssList(W)
          | ~ ssList(X)
          | ~ ssList(V)
          | ~ ssList(U)
          | segmentP(app(app(X,U),W),V) )
      <=> ( ~ ssList(X)
          | ~ ssList(U)
          | ~ ssList(V)
          | ~ segmentP(U,V)
          | segmentP(app(app(X,U),W),V)
          | ~ ssList(W) ) )),
    inference(bind,[status(th)],[]) ).

tff(53,plain,
    ( ! [W: $i,V: $i,U: $i,X: $i] :
        ( ~ segmentP(U,V)
        | ~ ssList(W)
        | ~ ssList(X)
        | ~ ssList(V)
        | ~ ssList(U)
        | segmentP(app(app(X,U),W),V) )
  <=> ! [W: $i,V: $i,U: $i,X: $i] :
        ( ~ ssList(X)
        | ~ ssList(U)
        | ~ ssList(V)
        | ~ segmentP(U,V)
        | segmentP(app(app(X,U),W),V)
        | ~ ssList(W) ) ),
    inference(quant_intro,[status(thm)],[52]) ).

tff(54,axiom,
    ! [W: $i,V: $i,U: $i,X: $i] :
      ( ~ segmentP(U,V)
      | ~ ssList(W)
      | ~ ssList(X)
      | ~ ssList(V)
      | ~ ssList(U)
      | segmentP(app(app(X,U),W),V) ),
    file('/export/starexec/sandbox/benchmark/Axioms/SWC001-0.ax',clause172) ).

tff(55,plain,
    ! [W: $i,V: $i,U: $i,X: $i] :
      ( ~ ssList(X)
      | ~ ssList(U)
      | ~ ssList(V)
      | ~ segmentP(U,V)
      | segmentP(app(app(X,U),W),V)
      | ~ ssList(W) ),
    inference(modus_ponens,[status(thm)],[54,53]) ).

tff(56,plain,
    ! [W: $i,V: $i,U: $i,X: $i] :
      ( ~ ssList(X)
      | ~ ssList(U)
      | ~ ssList(V)
      | ~ segmentP(U,V)
      | segmentP(app(app(X,U),W),V)
      | ~ ssList(W) ),
    inference(modus_ponens,[status(thm)],[55,51]) ).

tff(57,plain,
    ! [W: $i,V: $i,U: $i,X: $i] :
      ( ~ ssList(X)
      | ~ ssList(U)
      | ~ ssList(V)
      | ~ segmentP(U,V)
      | segmentP(app(app(X,U),W),V)
      | ~ ssList(W) ),
    inference(skolemize,[status(sab)],[56]) ).

tff(58,plain,
    ! [W: $i,V: $i,U: $i,X: $i] :
      ( ~ ssList(X)
      | ~ ssList(U)
      | ~ ssList(V)
      | ~ segmentP(U,V)
      | segmentP(app(app(X,U),W),V)
      | ~ ssList(W) ),
    inference(modus_ponens,[status(thm)],[57,50]) ).

tff(59,plain,
    ( ssList(nil)
  <=> ssList(nil) ),
    inference(rewrite,[status(thm)],[]) ).

tff(60,axiom,
    ssList(nil),
    file('/export/starexec/sandbox/benchmark/Axioms/SWC001-0.ax',clause8) ).

tff(61,plain,
    ssList(nil),
    inference(modus_ponens,[status(thm)],[60,59]) ).

tff(62,plain,
    ( ( ~ ! [W: $i,V: $i,U: $i,X: $i] :
            ( ~ ssList(X)
            | ~ ssList(U)
            | ~ ssList(V)
            | ~ segmentP(U,V)
            | segmentP(app(app(X,U),W),V)
            | ~ ssList(W) )
      | ~ ssList(nil)
      | ~ ssList(sk3)
      | ~ ssList(sk5)
      | ~ segmentP(sk3,sk3)
      | segmentP(app(app(nil,sk3),sk5),sk3) )
  <=> ( ~ ! [W: $i,V: $i,U: $i,X: $i] :
            ( ~ ssList(X)
            | ~ ssList(U)
            | ~ ssList(V)
            | ~ segmentP(U,V)
            | segmentP(app(app(X,U),W),V)
            | ~ ssList(W) )
      | ~ ssList(nil)
      | ~ ssList(sk3)
      | ~ ssList(sk5)
      | ~ segmentP(sk3,sk3)
      | segmentP(app(app(nil,sk3),sk5),sk3) ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(63,plain,
    ( ( ~ ssList(nil)
      | ~ ssList(sk3)
      | ~ ssList(sk3)
      | ~ segmentP(sk3,sk3)
      | segmentP(app(app(nil,sk3),sk5),sk3)
      | ~ ssList(sk5) )
  <=> ( ~ ssList(nil)
      | ~ ssList(sk3)
      | ~ ssList(sk5)
      | ~ segmentP(sk3,sk3)
      | segmentP(app(app(nil,sk3),sk5),sk3) ) ),
    inference(rewrite,[status(thm)],[]) ).

tff(64,plain,
    ( ( ~ ! [W: $i,V: $i,U: $i,X: $i] :
            ( ~ ssList(X)
            | ~ ssList(U)
            | ~ ssList(V)
            | ~ segmentP(U,V)
            | segmentP(app(app(X,U),W),V)
            | ~ ssList(W) )
      | ~ ssList(nil)
      | ~ ssList(sk3)
      | ~ ssList(sk3)
      | ~ segmentP(sk3,sk3)
      | segmentP(app(app(nil,sk3),sk5),sk3)
      | ~ ssList(sk5) )
  <=> ( ~ ! [W: $i,V: $i,U: $i,X: $i] :
            ( ~ ssList(X)
            | ~ ssList(U)
            | ~ ssList(V)
            | ~ segmentP(U,V)
            | segmentP(app(app(X,U),W),V)
            | ~ ssList(W) )
      | ~ ssList(nil)
      | ~ ssList(sk3)
      | ~ ssList(sk5)
      | ~ segmentP(sk3,sk3)
      | segmentP(app(app(nil,sk3),sk5),sk3) ) ),
    inference(monotonicity,[status(thm)],[63]) ).

tff(65,plain,
    ( ( ~ ! [W: $i,V: $i,U: $i,X: $i] :
            ( ~ ssList(X)
            | ~ ssList(U)
            | ~ ssList(V)
            | ~ segmentP(U,V)
            | segmentP(app(app(X,U),W),V)
            | ~ ssList(W) )
      | ~ ssList(nil)
      | ~ ssList(sk3)
      | ~ ssList(sk3)
      | ~ segmentP(sk3,sk3)
      | segmentP(app(app(nil,sk3),sk5),sk3)
      | ~ ssList(sk5) )
  <=> ( ~ ! [W: $i,V: $i,U: $i,X: $i] :
            ( ~ ssList(X)
            | ~ ssList(U)
            | ~ ssList(V)
            | ~ segmentP(U,V)
            | segmentP(app(app(X,U),W),V)
            | ~ ssList(W) )
      | ~ ssList(nil)
      | ~ ssList(sk3)
      | ~ ssList(sk5)
      | ~ segmentP(sk3,sk3)
      | segmentP(app(app(nil,sk3),sk5),sk3) ) ),
    inference(transitivity,[status(thm)],[64,62]) ).

tff(66,plain,
    ( ~ ! [W: $i,V: $i,U: $i,X: $i] :
          ( ~ ssList(X)
          | ~ ssList(U)
          | ~ ssList(V)
          | ~ segmentP(U,V)
          | segmentP(app(app(X,U),W),V)
          | ~ ssList(W) )
    | ~ ssList(nil)
    | ~ ssList(sk3)
    | ~ ssList(sk3)
    | ~ segmentP(sk3,sk3)
    | segmentP(app(app(nil,sk3),sk5),sk3)
    | ~ ssList(sk5) ),
    inference(quant_inst,[status(thm)],[]) ).

tff(67,plain,
    ( ~ ! [W: $i,V: $i,U: $i,X: $i] :
          ( ~ ssList(X)
          | ~ ssList(U)
          | ~ ssList(V)
          | ~ segmentP(U,V)
          | segmentP(app(app(X,U),W),V)
          | ~ ssList(W) )
    | ~ ssList(nil)
    | ~ ssList(sk3)
    | ~ ssList(sk5)
    | ~ segmentP(sk3,sk3)
    | segmentP(app(app(nil,sk3),sk5),sk3) ),
    inference(modus_ponens,[status(thm)],[66,65]) ).

tff(68,plain,
    segmentP(app(app(nil,sk3),sk5),sk3),
    inference(unit_resolution,[status(thm)],[67,61,58,14,48,45]) ).

tff(69,plain,
    $false,
    inference(unit_resolution,[status(thm)],[68,34]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.11/0.12  % Problem    : SWC372-1 : TPTP v9.0.0. Released v2.4.0.
% 0.11/0.12  % Command    : run_E %s %d THM
% 0.12/0.33  % Computer : n014.cluster.edu
% 0.12/0.33  % Model    : x86_64 x86_64
% 0.12/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33  % Memory   : 8042.1875MB
% 0.12/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33  % CPULimit   : 300
% 0.12/0.33  % WCLimit    : 300
% 0.12/0.33  % DateTime   : Fri Jun 20 09:09:09 EDT 2025
% 0.12/0.33  % CPUTime    : 
% 0.19/0.43  % SZS status Unsatisfiable
% 0.19/0.43  % SZS output start Proof
% See solution above
% 0.19/0.45  % E exiting
%------------------------------------------------------------------------------