TSTP Solution File: SWC422-1 by Z3---4.8.9.0

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Z3---4.8.9.0
% Problem  : SWC422-1 : TPTP v8.1.0. Released v2.4.0.
% Transfm  : none
% Format   : tptp
% Command  : z3_tptp -proof -model -t:%d -file:%s

% Computer : n006.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 : Tue Sep 20 11:57:53 EDT 2022

% Result   : Unsatisfiable 0.19s 0.45s
% Output   : Proof 0.19s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   10
%            Number of leaves      :   44
% Syntax   : Number of formulae    :   86 (  13 unt;  13 typ;   0 def)
%            Number of atoms       :  544 ( 160 equ)
%            Maximal formula atoms :   20 (   7 avg)
%            Number of connectives :  831 ( 416   ~; 351   |;   0   &)
%                                         (  64 <=>;   0  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   12 (   5 avg)
%            Maximal term depth    :    4 (   2 avg)
%            Number of FOOLs       :   56 (  56 fml;   0 var)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :    8 (   5   >;   3   *;   0   +;   0  <<)
%            Number of predicates  :   14 (  11 usr;   2 prp; 0-3 aty)
%            Number of functors    :   10 (  10 usr;   8 con; 0-2 aty)
%            Number of variables   :   87 (  75   !;   0   ?;  87   :)

% Comments : 
%------------------------------------------------------------------------------
tff(sk3_type,type,
    sk3: $i ).

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

tff(sk6_type,type,
    sk6: $i ).

tff(cons_type,type,
    cons: ( $i * $i ) > $i ).

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

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

tff(sk7_type,type,
    sk7: $i ).

tff(neq_type,type,
    neq: ( $i * $i ) > $o ).

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

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

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

tff(ssItem_type,type,
    ssItem: $i > $o ).

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

tff(1,plain,
    ( ( $false
      | ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) )
  <=> ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) ),
    inference(rewrite,[status(thm)],]) ).

tff(2,plain,
    ( ~ $true
  <=> $false ),
    inference(rewrite,[status(thm)],]) ).

tff(3,plain,
    ( neq(sk2,nil)
  <=> neq(sk4,nil) ),
    inference(rewrite,[status(thm)],]) ).

tff(4,plain,
    ( neq(sk2,nil)
  <=> neq(sk2,nil) ),
    inference(rewrite,[status(thm)],]) ).

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

tff(6,axiom,
    ( neq(sk2,nil)
    | neq(sk2,nil) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_7) ).

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

tff(8,plain,
    neq(sk2,nil),
    inference(modus_ponens,[status(thm)],[7,4]) ).

tff(9,plain,
    neq(sk4,nil),
    inference(modus_ponens,[status(thm)],[8,3]) ).

tff(10,plain,
    ( neq(sk4,nil)
  <=> $true ),
    inference(iff_true,[status(thm)],[9]) ).

tff(11,plain,
    ( ~ neq(sk4,nil)
  <=> ~ $true ),
    inference(monotonicity,[status(thm)],[10]) ).

tff(12,plain,
    ( ~ neq(sk4,nil)
  <=> $false ),
    inference(transitivity,[status(thm)],[11,2]) ).

tff(13,plain,
    ( ( ~ neq(sk4,nil)
      | ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) )
  <=> ( $false
      | ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) ) ),
    inference(monotonicity,[status(thm)],[12]) ).

tff(14,plain,
    ( ( ~ neq(sk4,nil)
      | ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) )
  <=> ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) ),
    inference(transitivity,[status(thm)],[13,1]) ).

tff(15,plain,
    ( ( ~ neq(sk4,nil)
      | ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) )
  <=> ( ~ neq(sk4,nil)
      | ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(16,plain,
    ( ( ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 )
      | ~ neq(sk4,nil) )
  <=> ( ~ neq(sk4,nil)
      | ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(17,axiom,
    ( ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 )
    | ~ neq(sk4,nil) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_20) ).

tff(18,plain,
    ( ~ neq(sk4,nil)
    | ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) ),
    inference(modus_ponens,[status(thm)],[17,16]) ).

tff(19,plain,
    ( ~ neq(sk4,nil)
    | ( app(app(sk7,cons(sk5,nil)),sk6) = sk3 ) ),
    inference(modus_ponens,[status(thm)],[18,15]) ).

tff(20,plain,
    app(app(sk7,cons(sk5,nil)),sk6) = sk3,
    inference(modus_ponens,[status(thm)],[19,14]) ).

tff(21,plain,
    ( ( $false
      | ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) )
  <=> ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) ),
    inference(rewrite,[status(thm)],]) ).

tff(22,plain,
    ( ( ~ neq(sk4,nil)
      | ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) )
  <=> ( $false
      | ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) ) ),
    inference(monotonicity,[status(thm)],[12]) ).

tff(23,plain,
    ( ( ~ neq(sk4,nil)
      | ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) )
  <=> ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) ),
    inference(transitivity,[status(thm)],[22,21]) ).

tff(24,plain,
    ( ( ~ neq(sk4,nil)
      | ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) )
  <=> ( ~ neq(sk4,nil)
      | ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(25,plain,
    ( ( ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 )
      | ~ neq(sk4,nil) )
  <=> ( ~ neq(sk4,nil)
      | ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(26,axiom,
    ( ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 )
    | ~ neq(sk4,nil) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_19) ).

tff(27,plain,
    ( ~ neq(sk4,nil)
    | ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) ),
    inference(modus_ponens,[status(thm)],[26,25]) ).

tff(28,plain,
    ( ~ neq(sk4,nil)
    | ( app(app(sk6,cons(sk5,nil)),sk7) = sk4 ) ),
    inference(modus_ponens,[status(thm)],[27,24]) ).

tff(29,plain,
    app(app(sk6,cons(sk5,nil)),sk7) = sk4,
    inference(modus_ponens,[status(thm)],[28,23]) ).

tff(30,plain,
    ( ( ssList(sk7)
      | $false )
  <=> ssList(sk7) ),
    inference(rewrite,[status(thm)],]) ).

tff(31,plain,
    ( ( ssList(sk7)
      | ~ neq(sk4,nil) )
  <=> ( ssList(sk7)
      | $false ) ),
    inference(monotonicity,[status(thm)],[12]) ).

tff(32,plain,
    ( ( ssList(sk7)
      | ~ neq(sk4,nil) )
  <=> ssList(sk7) ),
    inference(transitivity,[status(thm)],[31,30]) ).

tff(33,plain,
    ( ( ssList(sk7)
      | ~ neq(sk4,nil) )
  <=> ( ssList(sk7)
      | ~ neq(sk4,nil) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(34,axiom,
    ( ssList(sk7)
    | ~ neq(sk4,nil) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_18) ).

tff(35,plain,
    ( ssList(sk7)
    | ~ neq(sk4,nil) ),
    inference(modus_ponens,[status(thm)],[34,33]) ).

tff(36,plain,
    ssList(sk7),
    inference(modus_ponens,[status(thm)],[35,32]) ).

tff(37,plain,
    ( ( ssList(sk6)
      | $false )
  <=> ssList(sk6) ),
    inference(rewrite,[status(thm)],]) ).

tff(38,plain,
    ( ( ssList(sk6)
      | ~ neq(sk4,nil) )
  <=> ( ssList(sk6)
      | $false ) ),
    inference(monotonicity,[status(thm)],[12]) ).

tff(39,plain,
    ( ( ssList(sk6)
      | ~ neq(sk4,nil) )
  <=> ssList(sk6) ),
    inference(transitivity,[status(thm)],[38,37]) ).

tff(40,plain,
    ( ( ssList(sk6)
      | ~ neq(sk4,nil) )
  <=> ( ssList(sk6)
      | ~ neq(sk4,nil) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(41,axiom,
    ( ssList(sk6)
    | ~ neq(sk4,nil) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_17) ).

tff(42,plain,
    ( ssList(sk6)
    | ~ neq(sk4,nil) ),
    inference(modus_ponens,[status(thm)],[41,40]) ).

tff(43,plain,
    ssList(sk6),
    inference(modus_ponens,[status(thm)],[42,39]) ).

tff(44,plain,
    ( ( ssItem(sk5)
      | $false )
  <=> ssItem(sk5) ),
    inference(rewrite,[status(thm)],]) ).

tff(45,plain,
    ( ( ssItem(sk5)
      | ~ neq(sk4,nil) )
  <=> ( ssItem(sk5)
      | $false ) ),
    inference(monotonicity,[status(thm)],[12]) ).

tff(46,plain,
    ( ( ssItem(sk5)
      | ~ neq(sk4,nil) )
  <=> ssItem(sk5) ),
    inference(transitivity,[status(thm)],[45,44]) ).

tff(47,plain,
    ( ( ssItem(sk5)
      | ~ neq(sk4,nil) )
  <=> ( ssItem(sk5)
      | ~ neq(sk4,nil) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(48,axiom,
    ( ssItem(sk5)
    | ~ neq(sk4,nil) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_16) ).

tff(49,plain,
    ( ssItem(sk5)
    | ~ neq(sk4,nil) ),
    inference(modus_ponens,[status(thm)],[48,47]) ).

tff(50,plain,
    ssItem(sk5),
    inference(modus_ponens,[status(thm)],[49,46]) ).

tff(51,plain,
    ^ [B: $i,A: $i,C: $i] :
      refl(
        ( ( ~ ssList(C)
          | ~ ssItem(A)
          | ~ ssList(B)
          | ( app(app(C,cons(A,nil)),B) != sk3 )
          | ( app(app(B,cons(A,nil)),C) != sk4 ) )
      <=> ( ~ ssList(C)
          | ~ ssItem(A)
          | ~ ssList(B)
          | ( app(app(C,cons(A,nil)),B) != sk3 )
          | ( app(app(B,cons(A,nil)),C) != sk4 ) ) )),
    inference(bind,[status(th)],]) ).

tff(52,plain,
    ( ! [B: $i,A: $i,C: $i] :
        ( ~ ssList(C)
        | ~ ssItem(A)
        | ~ ssList(B)
        | ( app(app(C,cons(A,nil)),B) != sk3 )
        | ( app(app(B,cons(A,nil)),C) != sk4 ) )
  <=> ! [B: $i,A: $i,C: $i] :
        ( ~ ssList(C)
        | ~ ssItem(A)
        | ~ ssList(B)
        | ( app(app(C,cons(A,nil)),B) != sk3 )
        | ( app(app(B,cons(A,nil)),C) != sk4 ) ) ),
    inference(quant_intro,[status(thm)],[51]) ).

tff(53,plain,
    ^ [B: $i,A: $i,C: $i] :
      trans(
        monotonicity(
          trans(
            monotonicity(
              iff_true(
                mp(
                  mp(
                    mp(
                      asserted(
                        ( neq(sk2,nil)
                        | neq(sk2,nil) )),
                      rewrite(
                        ( ( neq(sk2,nil)
                          | neq(sk2,nil) )
                      <=> neq(sk2,nil) )),
                      neq(sk2,nil)),
                    rewrite(
                      ( neq(sk2,nil)
                    <=> neq(sk2,nil) )),
                    neq(sk2,nil)),
                  rewrite(
                    ( neq(sk2,nil)
                  <=> neq(sk4,nil) )),
                  neq(sk4,nil)),
                ( neq(sk4,nil)
              <=> $true )),
              ( ~ neq(sk4,nil)
            <=> ~ $true )),
            rewrite(
              ( ~ $true
            <=> $false )),
            ( ~ neq(sk4,nil)
          <=> $false )),
          ( ( ~ ssList(C)
            | ~ neq(sk4,nil)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) )
        <=> ( ~ ssList(C)
            | $false
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) ) )),
        rewrite(
          ( ( ~ ssList(C)
            | $false
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) )
        <=> ( ~ ssList(C)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) ) )),
        ( ( ~ ssList(C)
          | ~ neq(sk4,nil)
          | ~ ssItem(A)
          | ~ ssList(B)
          | ( app(app(C,cons(A,nil)),B) != sk3 )
          | ( app(app(B,cons(A,nil)),C) != sk4 ) )
      <=> ( ~ ssList(C)
          | ~ ssItem(A)
          | ~ ssList(B)
          | ( app(app(C,cons(A,nil)),B) != sk3 )
          | ( app(app(B,cons(A,nil)),C) != sk4 ) ) )),
    inference(bind,[status(th)],]) ).

tff(54,plain,
    ( ! [B: $i,A: $i,C: $i] :
        ( ~ ssList(C)
        | ~ neq(sk4,nil)
        | ~ ssItem(A)
        | ~ ssList(B)
        | ( app(app(C,cons(A,nil)),B) != sk3 )
        | ( app(app(B,cons(A,nil)),C) != sk4 ) )
  <=> ! [B: $i,A: $i,C: $i] :
        ( ~ ssList(C)
        | ~ ssItem(A)
        | ~ ssList(B)
        | ( app(app(C,cons(A,nil)),B) != sk3 )
        | ( app(app(B,cons(A,nil)),C) != sk4 ) ) ),
    inference(quant_intro,[status(thm)],[53]) ).

tff(55,plain,
    ^ [B: $i,A: $i,C: $i] :
      trans(
        monotonicity(
          rewrite(
            ( ( app(app(C,cons(A,nil)),B) != sk1 )
          <=> ( app(app(C,cons(A,nil)),B) != sk3 ) )),
          rewrite(
            ( ( app(app(B,cons(A,nil)),C) != sk2 )
          <=> ( app(app(B,cons(A,nil)),C) != sk4 ) )),
          ( ( ~ ssList(C)
            | ~ neq(sk4,nil)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk1 )
            | ( app(app(B,cons(A,nil)),C) != sk2 ) )
        <=> ( ~ ssList(C)
            | ~ neq(sk4,nil)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) ) )),
        rewrite(
          ( ( ~ ssList(C)
            | ~ neq(sk4,nil)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) )
        <=> ( ~ ssList(C)
            | ~ neq(sk4,nil)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) ) )),
        ( ( ~ ssList(C)
          | ~ neq(sk4,nil)
          | ~ ssItem(A)
          | ~ ssList(B)
          | ( app(app(C,cons(A,nil)),B) != sk1 )
          | ( app(app(B,cons(A,nil)),C) != sk2 ) )
      <=> ( ~ ssList(C)
          | ~ neq(sk4,nil)
          | ~ ssItem(A)
          | ~ ssList(B)
          | ( app(app(C,cons(A,nil)),B) != sk3 )
          | ( app(app(B,cons(A,nil)),C) != sk4 ) ) )),
    inference(bind,[status(th)],]) ).

tff(56,plain,
    ( ! [B: $i,A: $i,C: $i] :
        ( ~ ssList(C)
        | ~ neq(sk4,nil)
        | ~ ssItem(A)
        | ~ ssList(B)
        | ( app(app(C,cons(A,nil)),B) != sk1 )
        | ( app(app(B,cons(A,nil)),C) != sk2 ) )
  <=> ! [B: $i,A: $i,C: $i] :
        ( ~ ssList(C)
        | ~ neq(sk4,nil)
        | ~ ssItem(A)
        | ~ ssList(B)
        | ( app(app(C,cons(A,nil)),B) != sk3 )
        | ( app(app(B,cons(A,nil)),C) != sk4 ) ) ),
    inference(quant_intro,[status(thm)],[55]) ).

tff(57,plain,
    ( ! [B: $i,A: $i,C: $i] :
        ( ~ ssList(C)
        | ~ neq(sk4,nil)
        | ~ ssItem(A)
        | ~ ssList(B)
        | ( app(app(C,cons(A,nil)),B) != sk1 )
        | ( app(app(B,cons(A,nil)),C) != sk2 ) )
  <=> ! [B: $i,A: $i,C: $i] :
        ( ~ ssList(C)
        | ~ neq(sk4,nil)
        | ~ ssItem(A)
        | ~ ssList(B)
        | ( app(app(C,cons(A,nil)),B) != sk1 )
        | ( app(app(B,cons(A,nil)),C) != sk2 ) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(58,plain,
    ^ [B: $i,A: $i,C: $i] :
      trans(
        monotonicity(
          trans(
            monotonicity(
              trans(
                monotonicity(
                  rewrite(
                    ( ( ~ ssItem(A)
                      | ~ ssList(B)
                      | ~ ssList(C) )
                  <=> ( ~ ssList(C)
                      | ~ ssItem(A)
                      | ~ ssList(B) ) )),
                  ( ( ~ ssItem(A)
                    | ~ ssList(B)
                    | ~ ssList(C)
                    | ( app(app(B,cons(A,nil)),C) != sk2 ) )
                <=> ( ~ ssList(C)
                    | ~ ssItem(A)
                    | ~ ssList(B)
                    | ( app(app(B,cons(A,nil)),C) != sk2 ) ) )),
                rewrite(
                  ( ( ~ ssList(C)
                    | ~ ssItem(A)
                    | ~ ssList(B)
                    | ( app(app(B,cons(A,nil)),C) != sk2 ) )
                <=> ( ~ ssList(C)
                    | ~ ssItem(A)
                    | ~ ssList(B)
                    | ( app(app(B,cons(A,nil)),C) != sk2 ) ) )),
                ( ( ~ ssItem(A)
                  | ~ ssList(B)
                  | ~ ssList(C)
                  | ( app(app(B,cons(A,nil)),C) != sk2 ) )
              <=> ( ~ ssList(C)
                  | ~ ssItem(A)
                  | ~ ssList(B)
                  | ( app(app(B,cons(A,nil)),C) != sk2 ) ) )),
              ( ( ~ ssItem(A)
                | ~ ssList(B)
                | ~ ssList(C)
                | ( app(app(B,cons(A,nil)),C) != sk2 )
                | ( app(app(C,cons(A,nil)),B) != sk1 ) )
            <=> ( ~ ssList(C)
                | ~ ssItem(A)
                | ~ ssList(B)
                | ( app(app(B,cons(A,nil)),C) != sk2 )
                | ( app(app(C,cons(A,nil)),B) != sk1 ) ) )),
            rewrite(
              ( ( ~ ssList(C)
                | ~ ssItem(A)
                | ~ ssList(B)
                | ( app(app(B,cons(A,nil)),C) != sk2 )
                | ( app(app(C,cons(A,nil)),B) != sk1 ) )
            <=> ( ~ ssList(C)
                | ~ ssItem(A)
                | ~ ssList(B)
                | ( app(app(C,cons(A,nil)),B) != sk1 )
                | ( app(app(B,cons(A,nil)),C) != sk2 ) ) )),
            ( ( ~ ssItem(A)
              | ~ ssList(B)
              | ~ ssList(C)
              | ( app(app(B,cons(A,nil)),C) != sk2 )
              | ( app(app(C,cons(A,nil)),B) != sk1 ) )
          <=> ( ~ ssList(C)
              | ~ ssItem(A)
              | ~ ssList(B)
              | ( app(app(C,cons(A,nil)),B) != sk1 )
              | ( app(app(B,cons(A,nil)),C) != sk2 ) ) )),
          ( ( ~ ssItem(A)
            | ~ ssList(B)
            | ~ ssList(C)
            | ( app(app(B,cons(A,nil)),C) != sk2 )
            | ( app(app(C,cons(A,nil)),B) != sk1 )
            | ~ neq(sk4,nil) )
        <=> ( ~ ssList(C)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk1 )
            | ( app(app(B,cons(A,nil)),C) != sk2 )
            | ~ neq(sk4,nil) ) )),
        rewrite(
          ( ( ~ ssList(C)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk1 )
            | ( app(app(B,cons(A,nil)),C) != sk2 )
            | ~ neq(sk4,nil) )
        <=> ( ~ ssList(C)
            | ~ neq(sk4,nil)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk1 )
            | ( app(app(B,cons(A,nil)),C) != sk2 ) ) )),
        ( ( ~ ssItem(A)
          | ~ ssList(B)
          | ~ ssList(C)
          | ( app(app(B,cons(A,nil)),C) != sk2 )
          | ( app(app(C,cons(A,nil)),B) != sk1 )
          | ~ neq(sk4,nil) )
      <=> ( ~ ssList(C)
          | ~ neq(sk4,nil)
          | ~ ssItem(A)
          | ~ ssList(B)
          | ( app(app(C,cons(A,nil)),B) != sk1 )
          | ( app(app(B,cons(A,nil)),C) != sk2 ) ) )),
    inference(bind,[status(th)],]) ).

tff(59,plain,
    ( ! [B: $i,A: $i,C: $i] :
        ( ~ ssItem(A)
        | ~ ssList(B)
        | ~ ssList(C)
        | ( app(app(B,cons(A,nil)),C) != sk2 )
        | ( app(app(C,cons(A,nil)),B) != sk1 )
        | ~ neq(sk4,nil) )
  <=> ! [B: $i,A: $i,C: $i] :
        ( ~ ssList(C)
        | ~ neq(sk4,nil)
        | ~ ssItem(A)
        | ~ ssList(B)
        | ( app(app(C,cons(A,nil)),B) != sk1 )
        | ( app(app(B,cons(A,nil)),C) != sk2 ) ) ),
    inference(quant_intro,[status(thm)],[58]) ).

tff(60,axiom,
    ! [B: $i,A: $i,C: $i] :
      ( ~ ssItem(A)
      | ~ ssList(B)
      | ~ ssList(C)
      | ( app(app(B,cons(A,nil)),C) != sk2 )
      | ( app(app(C,cons(A,nil)),B) != sk1 )
      | ~ neq(sk4,nil) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',co1_15) ).

tff(61,plain,
    ! [B: $i,A: $i,C: $i] :
      ( ~ ssList(C)
      | ~ neq(sk4,nil)
      | ~ ssItem(A)
      | ~ ssList(B)
      | ( app(app(C,cons(A,nil)),B) != sk1 )
      | ( app(app(B,cons(A,nil)),C) != sk2 ) ),
    inference(modus_ponens,[status(thm)],[60,59]) ).

tff(62,plain,
    ! [B: $i,A: $i,C: $i] :
      ( ~ ssList(C)
      | ~ neq(sk4,nil)
      | ~ ssItem(A)
      | ~ ssList(B)
      | ( app(app(C,cons(A,nil)),B) != sk1 )
      | ( app(app(B,cons(A,nil)),C) != sk2 ) ),
    inference(modus_ponens,[status(thm)],[61,57]) ).

tff(63,plain,
    ! [B: $i,A: $i,C: $i] :
      ( ~ ssList(C)
      | ~ neq(sk4,nil)
      | ~ ssItem(A)
      | ~ ssList(B)
      | ( app(app(C,cons(A,nil)),B) != sk3 )
      | ( app(app(B,cons(A,nil)),C) != sk4 ) ),
    inference(modus_ponens,[status(thm)],[62,56]) ).

tff(64,plain,
    ! [B: $i,A: $i,C: $i] :
      ( ~ ssList(C)
      | ~ ssItem(A)
      | ~ ssList(B)
      | ( app(app(C,cons(A,nil)),B) != sk3 )
      | ( app(app(B,cons(A,nil)),C) != sk4 ) ),
    inference(modus_ponens,[status(thm)],[63,54]) ).

tff(65,plain,
    ! [B: $i,A: $i,C: $i] :
      ( ~ ssList(C)
      | ~ ssItem(A)
      | ~ ssList(B)
      | ( app(app(C,cons(A,nil)),B) != sk3 )
      | ( app(app(B,cons(A,nil)),C) != sk4 ) ),
    inference(skolemize,[status(sab)],[64]) ).

tff(66,plain,
    ! [B: $i,A: $i,C: $i] :
      ( ~ ssList(C)
      | ~ ssItem(A)
      | ~ ssList(B)
      | ( app(app(C,cons(A,nil)),B) != sk3 )
      | ( app(app(B,cons(A,nil)),C) != sk4 ) ),
    inference(modus_ponens,[status(thm)],[65,52]) ).

tff(67,plain,
    ( ( ~ ! [B: $i,A: $i,C: $i] :
            ( ~ ssList(C)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) )
      | ~ ssList(sk6)
      | ~ ssList(sk7)
      | ~ ssItem(sk5)
      | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
      | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) )
  <=> ( ~ ! [B: $i,A: $i,C: $i] :
            ( ~ ssList(C)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) )
      | ~ ssList(sk6)
      | ~ ssList(sk7)
      | ~ ssItem(sk5)
      | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
      | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(68,plain,
    ( ( ~ ssList(sk7)
      | ~ ssItem(sk5)
      | ~ ssList(sk6)
      | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
      | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) )
  <=> ( ~ ssList(sk6)
      | ~ ssList(sk7)
      | ~ ssItem(sk5)
      | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
      | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) ) ),
    inference(rewrite,[status(thm)],]) ).

tff(69,plain,
    ( ( ~ ! [B: $i,A: $i,C: $i] :
            ( ~ ssList(C)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) )
      | ~ ssList(sk7)
      | ~ ssItem(sk5)
      | ~ ssList(sk6)
      | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
      | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) )
  <=> ( ~ ! [B: $i,A: $i,C: $i] :
            ( ~ ssList(C)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) )
      | ~ ssList(sk6)
      | ~ ssList(sk7)
      | ~ ssItem(sk5)
      | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
      | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) ) ),
    inference(monotonicity,[status(thm)],[68]) ).

tff(70,plain,
    ( ( ~ ! [B: $i,A: $i,C: $i] :
            ( ~ ssList(C)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) )
      | ~ ssList(sk7)
      | ~ ssItem(sk5)
      | ~ ssList(sk6)
      | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
      | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) )
  <=> ( ~ ! [B: $i,A: $i,C: $i] :
            ( ~ ssList(C)
            | ~ ssItem(A)
            | ~ ssList(B)
            | ( app(app(C,cons(A,nil)),B) != sk3 )
            | ( app(app(B,cons(A,nil)),C) != sk4 ) )
      | ~ ssList(sk6)
      | ~ ssList(sk7)
      | ~ ssItem(sk5)
      | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
      | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) ) ),
    inference(transitivity,[status(thm)],[69,67]) ).

tff(71,plain,
    ( ~ ! [B: $i,A: $i,C: $i] :
          ( ~ ssList(C)
          | ~ ssItem(A)
          | ~ ssList(B)
          | ( app(app(C,cons(A,nil)),B) != sk3 )
          | ( app(app(B,cons(A,nil)),C) != sk4 ) )
    | ~ ssList(sk7)
    | ~ ssItem(sk5)
    | ~ ssList(sk6)
    | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
    | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) ),
    inference(quant_inst,[status(thm)],]) ).

tff(72,plain,
    ( ~ ! [B: $i,A: $i,C: $i] :
          ( ~ ssList(C)
          | ~ ssItem(A)
          | ~ ssList(B)
          | ( app(app(C,cons(A,nil)),B) != sk3 )
          | ( app(app(B,cons(A,nil)),C) != sk4 ) )
    | ~ ssList(sk6)
    | ~ ssList(sk7)
    | ~ ssItem(sk5)
    | ( app(app(sk7,cons(sk5,nil)),sk6) != sk3 )
    | ( app(app(sk6,cons(sk5,nil)),sk7) != sk4 ) ),
    inference(modus_ponens,[status(thm)],[71,70]) ).

tff(73,plain,
    $false,
    inference(unit_resolution,[status(thm)],[72,66,50,43,36,29,20]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.06/0.11  % Problem  : SWC422-1 : TPTP v8.1.0. Released v2.4.0.
% 0.06/0.12  % Command  : z3_tptp -proof -model -t:%d -file:%s
% 0.13/0.32  % Computer : n006.cluster.edu
% 0.13/0.32  % Model    : x86_64 x86_64
% 0.13/0.32  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.32  % Memory   : 8042.1875MB
% 0.13/0.32  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.13/0.32  % CPULimit : 300
% 0.13/0.32  % WCLimit  : 300
% 0.13/0.32  % DateTime : Sun Sep  4 00:52:38 EDT 2022
% 0.13/0.33  % CPUTime  : 
% 0.13/0.33  Z3tptp [4.8.9.0] (c) 2006-20**. Microsoft Corp.
% 0.13/0.33  Usage: tptp [options] [-file:]file
% 0.13/0.33    -h, -?       prints this message.
% 0.13/0.33    -smt2        print SMT-LIB2 benchmark.
% 0.13/0.33    -m, -model   generate model.
% 0.13/0.33    -p, -proof   generate proof.
% 0.13/0.33    -c, -core    generate unsat core of named formulas.
% 0.13/0.33    -st, -statistics display statistics.
% 0.13/0.33    -t:timeout   set timeout (in second).
% 0.13/0.33    -smt2status  display status in smt2 format instead of SZS.
% 0.13/0.33    -check_status check the status produced by Z3 against annotation in benchmark.
% 0.13/0.33    -<param>:<value> configuration parameter and value.
% 0.13/0.33    -o:<output-file> file to place output in.
% 0.19/0.45  % SZS status Unsatisfiable
% 0.19/0.45  % SZS output start Proof
% See solution above
%------------------------------------------------------------------------------