TSTP Solution File: SET931+1 by Leo-III---1.7.7

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%------------------------------------------------------------------------------
% File     : Leo-III---1.7.7
% Problem  : SET931+1 : TPTP v8.1.2. Released v3.2.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : run_Leo-III %s %d

% Computer : n021.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 : Fri May 19 11:54:53 EDT 2023

% Result   : Theorem 2.70s 1.67s
% Output   : Refutation 2.92s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :    3
%            Number of leaves      :   14
% Syntax   : Number of formulae    :   24 (  11 unt;   6 typ;   0 def)
%            Number of atoms       :   52 (  37 equ;   0 cnn)
%            Maximal formula atoms :   10 (   2 avg)
%            Number of connectives :  159 (  39   ~;   0   |;  24   &;  86   @)
%                                         (   4 <=>;   6  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   12 (   6 avg)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :    8 (   8   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    8 (   6 usr;   2 con; 0-2 aty)
%            Number of variables   :   30 (   0   ^;  26   !;   4   ?;  30   :)

% Comments : 
%------------------------------------------------------------------------------
thf(set_difference_type,type,
    set_difference: $i > $i > $i ).

thf(unordered_pair_type,type,
    unordered_pair: $i > $i > $i ).

thf(empty_set_type,type,
    empty_set: $i ).

thf(singleton_type,type,
    singleton: $i > $i ).

thf(empty_type,type,
    empty: $i > $o ).

thf(subset_type,type,
    subset: $i > $i > $o ).

thf(1,conjecture,
    ! [A: $i,B: $i,C: $i] :
      ( ( ( set_difference @ A @ ( unordered_pair @ B @ C ) )
        = empty_set )
    <=> ~ ( ( A != empty_set )
          & ( A
           != ( singleton @ B ) )
          & ( A
           != ( singleton @ C ) )
          & ( A
           != ( unordered_pair @ B @ C ) ) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',t75_zfmisc_1) ).

thf(2,negated_conjecture,
    ~ ! [A: $i,B: $i,C: $i] :
        ( ( ( set_difference @ A @ ( unordered_pair @ B @ C ) )
          = empty_set )
      <=> ~ ( ( A != empty_set )
            & ( A
             != ( singleton @ B ) )
            & ( A
             != ( singleton @ C ) )
            & ( A
             != ( unordered_pair @ B @ C ) ) ) ),
    inference(neg_conjecture,[status(cth)],[1]) ).

thf(10,plain,
    ~ ! [A: $i,B: $i,C: $i] :
        ( ( ( ( set_difference @ A @ ( unordered_pair @ B @ C ) )
            = empty_set )
         => ~ ( ( A != empty_set )
              & ( A
               != ( singleton @ B ) )
              & ( A
               != ( singleton @ C ) )
              & ( A
               != ( unordered_pair @ B @ C ) ) ) )
        & ( ~ ( ( A != empty_set )
              & ( A
               != ( singleton @ B ) )
              & ( A
               != ( singleton @ C ) )
              & ( A
               != ( unordered_pair @ B @ C ) ) )
         => ( ( set_difference @ A @ ( unordered_pair @ B @ C ) )
            = empty_set ) ) ),
    inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).

thf(9,axiom,
    ! [A: $i,B: $i] :
      ( ( ( set_difference @ A @ B )
        = empty_set )
    <=> ( subset @ A @ B ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',t37_xboole_1) ).

thf(53,plain,
    ! [A: $i,B: $i] :
      ( ( ( ( set_difference @ A @ B )
          = empty_set )
       => ( subset @ A @ B ) )
      & ( ( subset @ A @ B )
       => ( ( set_difference @ A @ B )
          = empty_set ) ) ),
    inference(defexp_and_simp_and_etaexpand,[status(thm)],[9]) ).

thf(7,axiom,
    ? [A: $i] :
      ~ ( empty @ A ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',rc2_xboole_0) ).

thf(48,plain,
    ? [A: $i] :
      ~ ( empty @ A ),
    inference(defexp_and_simp_and_etaexpand,[status(thm)],[7]) ).

thf(3,axiom,
    ! [A: $i,B: $i] :
      ( ( unordered_pair @ A @ B )
      = ( unordered_pair @ B @ A ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',commutativity_k2_tarski) ).

thf(26,plain,
    ! [A: $i,B: $i] :
      ( ( unordered_pair @ A @ B )
      = ( unordered_pair @ B @ A ) ),
    inference(defexp_and_simp_and_etaexpand,[status(thm)],[3]) ).

thf(6,axiom,
    ? [A: $i] : ( empty @ A ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',rc1_xboole_0) ).

thf(46,plain,
    ? [A: $i] : ( empty @ A ),
    inference(defexp_and_simp_and_etaexpand,[status(thm)],[6]) ).

thf(4,axiom,
    empty @ empty_set,
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',fc1_xboole_0) ).

thf(29,plain,
    empty @ empty_set,
    inference(defexp_and_simp_and_etaexpand,[status(thm)],[4]) ).

thf(5,axiom,
    ! [A: $i,B: $i,C: $i] :
      ( ( subset @ A @ ( unordered_pair @ B @ C ) )
    <=> ~ ( ( A != empty_set )
          & ( A
           != ( singleton @ B ) )
          & ( A
           != ( singleton @ C ) )
          & ( A
           != ( unordered_pair @ B @ C ) ) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',l46_zfmisc_1) ).

thf(30,plain,
    ! [A: $i,B: $i,C: $i] :
      ( ( ( subset @ A @ ( unordered_pair @ B @ C ) )
       => ~ ( ( A != empty_set )
            & ( A
             != ( singleton @ B ) )
            & ( A
             != ( singleton @ C ) )
            & ( A
             != ( unordered_pair @ B @ C ) ) ) )
      & ( ~ ( ( A != empty_set )
            & ( A
             != ( singleton @ B ) )
            & ( A
             != ( singleton @ C ) )
            & ( A
             != ( unordered_pair @ B @ C ) ) )
       => ( subset @ A @ ( unordered_pair @ B @ C ) ) ) ),
    inference(defexp_and_simp_and_etaexpand,[status(thm)],[5]) ).

thf(8,axiom,
    ! [A: $i,B: $i] : ( subset @ A @ A ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',reflexivity_r1_tarski) ).

thf(51,plain,
    ! [A: $i] : ( subset @ A @ A ),
    inference(defexp_and_simp_and_etaexpand,[status(thm)],[8]) ).

thf(60,plain,
    $false,
    inference(e,[status(thm)],[10,53,48,26,46,29,30,51]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.09  % Problem  : SET931+1 : TPTP v8.1.2. Released v3.2.0.
% 0.08/0.11  % Command  : run_Leo-III %s %d
% 0.11/0.30  % Computer : n021.cluster.edu
% 0.11/0.30  % Model    : x86_64 x86_64
% 0.11/0.30  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.30  % Memory   : 8042.1875MB
% 0.11/0.30  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.11/0.30  % CPULimit : 300
% 0.11/0.30  % WCLimit  : 300
% 0.11/0.30  % DateTime : Thu May 18 19:10:58 EDT 2023
% 0.11/0.30  % CPUTime  : 
% 0.80/0.77  % [INFO] 	 Parsing problem /export/starexec/sandbox/benchmark/theBenchmark.p ... 
% 1.09/0.89  % [INFO] 	 Parsing done (115ms). 
% 1.09/0.89  % [INFO] 	 Running in sequential loop mode. 
% 1.50/1.12  % [INFO] 	 eprover registered as external prover. 
% 1.50/1.13  % [INFO] 	 cvc4 registered as external prover. 
% 1.50/1.13  % [INFO] 	 Scanning for conjecture ... 
% 1.69/1.19  % [INFO] 	 Found a conjecture and 7 axioms. Running axiom selection ... 
% 1.69/1.22  % [INFO] 	 Axiom selection finished. Selected 7 axioms (removed 0 axioms). 
% 1.69/1.23  % [INFO] 	 Problem is first-order (TPTP FOF). 
% 1.69/1.23  % [INFO] 	 Type checking passed. 
% 1.69/1.23  % [CONFIG] 	 Using configuration: timeout(300) with strategy<name(default),share(1.0),primSubst(3),sos(false),unifierCount(4),uniDepth(8),boolExt(true),choice(true),renaming(true),funcspec(false), domConstr(0),specialInstances(39),restrictUniAttempts(true),termOrdering(CPO)>.  Searching for refutation ... 
% 2.70/1.67  % External prover 'e' found a proof!
% 2.70/1.67  % [INFO] 	 Killing All external provers ... 
% 2.70/1.67  % Time passed: 1243ms (effective reasoning time: 770ms)
% 2.70/1.67  % Solved by strategy<name(default),share(1.0),primSubst(3),sos(false),unifierCount(4),uniDepth(8),boolExt(true),choice(true),renaming(true),funcspec(false), domConstr(0),specialInstances(39),restrictUniAttempts(true),termOrdering(CPO)>
% 2.70/1.67  % Axioms used in derivation (7): fc1_xboole_0, l46_zfmisc_1, t37_xboole_1, commutativity_k2_tarski, reflexivity_r1_tarski, rc1_xboole_0, rc2_xboole_0
% 2.70/1.67  % No. of inferences in proof: 18
% 2.70/1.67  % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : 1243 ms resp. 770 ms w/o parsing
% 2.92/1.75  % SZS output start Refutation for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
% 2.92/1.75  % [INFO] 	 Killing All external provers ... 
%------------------------------------------------------------------------------