%------------------------------------------------------------------------------
% File     : SPASS---3.9
% Problem  : SET231-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp
% Command  : run_spass %d %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  : 600s
% DateTime : Tue Jul 19 05:25:10 EDT 2022

% Result   : Unsatisfiable 0.19s 0.44s
% Output   : Refutation 0.19s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :    3
%            Number of leaves      :    4
% Syntax   : Number of clauses     :    7 (   5 unt;   1 nHn;   7 RR)
%            Number of literals    :    9 (   0 equ;   4 neg)
%            Maximal clause size   :    2 (   1 avg)
%            Maximal term depth    :    5 (   2 avg)
%            Number of predicates  :    4 (   3 usr;   1 prp; 0-2 aty)
%            Number of functors    :   11 (  11 usr;   6 con; 0-2 aty)
%            Number of variables   :    0 (   0 sgn)

% Comments : 
%------------------------------------------------------------------------------
cnf(1,axiom,
    ~ subclass(cross_product(x__dfg,y__dfg),z__dfg),
    file('SET231-6.p',unknown),
    [] ).

cnf(2,axiom,
    ~ equal(ordered_pair(first(not_subclass_element(cross_product(x__dfg,y__dfg),z__dfg)),second(not_subclass_element(cross_product(x__dfg,y__dfg),z__dfg))),not_subclass_element(cross_product(x__dfg,y__dfg),z__dfg)),
    file('SET231-6.p',unknown),
    [] ).

cnf(4,axiom,
    ( subclass(u,v)
    | member(not_subclass_element(u,v),u) ),
    file('SET231-6.p',unknown),
    [] ).

cnf(19,axiom,
    ( ~ member(u,cross_product(v,w))
    | equal(ordered_pair(first(u),second(u)),u) ),
    file('SET231-6.p',unknown),
    [] ).

cnf(123,plain,
    ~ member(not_subclass_element(cross_product(x__dfg,y__dfg),z__dfg),cross_product(u,v)),
    inference(res,[status(thm),theory(equality)],[19,2]),
    [iquote('0:Res:19.1,2.0')] ).

cnf(200,plain,
    subclass(cross_product(x__dfg,y__dfg),z__dfg),
    inference(res,[status(thm),theory(equality)],[4,123]),
    [iquote('0:Res:4.1,123.0')] ).

cnf(201,plain,
    $false,
    inference(mrr,[status(thm)],[200,1]),
    [iquote('0:MRR:200.0,1.0')] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.04/0.12  % Problem  : SET231-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.04/0.13  % Command  : run_spass %d %s
% 0.13/0.34  % Computer : n006.cluster.edu
% 0.13/0.34  % Model    : x86_64 x86_64
% 0.13/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.34  % Memory   : 8042.1875MB
% 0.13/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.13/0.34  % CPULimit : 300
% 0.13/0.34  % WCLimit  : 600
% 0.13/0.34  % DateTime : Sun Jul 10 04:52:21 EDT 2022
% 0.13/0.34  % CPUTime  : 
% 0.19/0.44  
% 0.19/0.44  SPASS V 3.9 
% 0.19/0.44  SPASS beiseite: Proof found.
% 0.19/0.44  % SZS status Theorem
% 0.19/0.44  Problem: /export/starexec/sandbox/benchmark/theBenchmark.p 
% 0.19/0.44  SPASS derived 73 clauses, backtracked 0 clauses, performed 1 splits and kept 163 clauses.
% 0.19/0.44  SPASS allocated 75880 KBytes.
% 0.19/0.44  SPASS spent	0:00:00.09 on the problem.
% 0.19/0.44  		0:00:00.04 for the input.
% 0.19/0.44  		0:00:00.00 for the FLOTTER CNF translation.
% 0.19/0.44  		0:00:00.00 for inferences.
% 0.19/0.44  		0:00:00.00 for the backtracking.
% 0.19/0.44  		0:00:00.02 for the reduction.
% 0.19/0.44  
% 0.19/0.44  
% 0.19/0.44  Here is a proof with depth 2, length 7 :
% 0.19/0.44  % SZS output start Refutation
% See solution above
% 0.19/0.44  Formulae used in the proof : prove_cross_product_property6_1 prove_cross_product_property6_2 not_subclass_members1 cartesian_product4
% 0.19/0.44  
%------------------------------------------------------------------------------