TSTP Solution File: SET234-6 by SPASS---3.9
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%------------------------------------------------------------------------------
% File : SPASS---3.9
% Problem : SET234-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp
% Command : run_spass %d %s
% Computer : n010.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 05:25:11 EDT 2022
% Result : Unsatisfiable 4.21s 4.44s
% Output : Refutation 4.21s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 5
% Syntax : Number of clauses : 10 ( 5 unt; 3 nHn; 10 RR)
% Number of literals : 15 ( 0 equ; 3 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,
member(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))),z__dfg),
file('SET234-6.p',unknown),
[] ).
cnf(2,axiom,
~ subclass(cross_product(x__dfg,y__dfg),z__dfg),
file('SET234-6.p',unknown),
[] ).
cnf(4,axiom,
( subclass(u,v)
| member(not_subclass_element(u,v),u) ),
file('SET234-6.p',unknown),
[] ).
cnf(5,axiom,
( ~ member(not_subclass_element(u,v),v)
| subclass(u,v) ),
file('SET234-6.p',unknown),
[] ).
cnf(19,axiom,
( ~ member(u,cross_product(v,w))
| equal(ordered_pair(first(u),second(u)),u) ),
file('SET234-6.p',unknown),
[] ).
cnf(1150,plain,
( subclass(cross_product(u,v),w)
| equal(ordered_pair(first(not_subclass_element(cross_product(u,v),w)),second(not_subclass_element(cross_product(u,v),w))),not_subclass_element(cross_product(u,v),w)) ),
inference(res,[status(thm),theory(equality)],[4,19]),
[iquote('0:Res:4.1,19.0')] ).
cnf(15763,plain,
( subclass(cross_product(x__dfg,y__dfg),z__dfg)
| member(not_subclass_element(cross_product(x__dfg,y__dfg),z__dfg),z__dfg) ),
inference(spr,[status(thm),theory(equality)],[1150,1]),
[iquote('0:SpR:1150.1,1.0')] ).
cnf(15798,plain,
member(not_subclass_element(cross_product(x__dfg,y__dfg),z__dfg),z__dfg),
inference(mrr,[status(thm)],[15763,2]),
[iquote('0:MRR:15763.0,2.0')] ).
cnf(15812,plain,
subclass(cross_product(x__dfg,y__dfg),z__dfg),
inference(res,[status(thm),theory(equality)],[15798,5]),
[iquote('0:Res:15798.0,5.0')] ).
cnf(15813,plain,
$false,
inference(mrr,[status(thm)],[15812,2]),
[iquote('0:MRR:15812.0,2.0')] ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.13 % Problem : SET234-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.13/0.13 % Command : run_spass %d %s
% 0.13/0.35 % Computer : n010.cluster.edu
% 0.13/0.35 % Model : x86_64 x86_64
% 0.13/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.35 % Memory : 8042.1875MB
% 0.13/0.35 % OS : Linux 3.10.0-693.el7.x86_64
% 0.13/0.35 % CPULimit : 300
% 0.13/0.35 % WCLimit : 600
% 0.13/0.35 % DateTime : Mon Jul 11 07:12:15 EDT 2022
% 0.19/0.35 % CPUTime :
% 4.21/4.44
% 4.21/4.44 SPASS V 3.9
% 4.21/4.44 SPASS beiseite: Proof found.
% 4.21/4.44 % SZS status Theorem
% 4.21/4.44 Problem: /export/starexec/sandbox/benchmark/theBenchmark.p
% 4.21/4.44 SPASS derived 12580 clauses, backtracked 464 clauses, performed 5 splits and kept 6260 clauses.
% 4.21/4.44 SPASS allocated 89755 KBytes.
% 4.21/4.44 SPASS spent 0:00:03.99 on the problem.
% 4.21/4.44 0:00:00.04 for the input.
% 4.21/4.44 0:00:00.00 for the FLOTTER CNF translation.
% 4.21/4.44 0:00:00.14 for inferences.
% 4.21/4.44 0:00:00.30 for the backtracking.
% 4.21/4.44 0:00:03.41 for the reduction.
% 4.21/4.44
% 4.21/4.44
% 4.21/4.44 Here is a proof with depth 3, length 10 :
% 4.21/4.44 % SZS output start Refutation
% See solution above
% 4.21/4.44 Formulae used in the proof : prove_cross_product_property9_1 prove_cross_product_property9_2 not_subclass_members1 not_subclass_members2 cartesian_product4
% 4.21/4.44
%------------------------------------------------------------------------------