TSTP Solution File: SET235-6 by SPASS---3.9
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%------------------------------------------------------------------------------
% File : SPASS---3.9
% Problem : SET235-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp
% Command : run_spass %d %s
% Computer : n016.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 4.25s 4.47s
% Output : Refutation 4.25s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 6
% Syntax : Number of clauses : 12 ( 6 unt; 1 nHn; 12 RR)
% Number of literals : 19 ( 0 equ; 10 neg)
% Maximal clause size : 3 ( 1 avg)
% Maximal term depth : 4 ( 1 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(x__dfg,cross_product(universal_class,universal_class)),
file('SET235-6.p',unknown),
[] ).
cnf(2,axiom,
~ member(ordered_pair(first(not_subclass_element(x__dfg,y__dfg)),second(not_subclass_element(x__dfg,y__dfg))),x__dfg),
file('SET235-6.p',unknown),
[] ).
cnf(3,axiom,
~ subclass(x__dfg,y__dfg),
file('SET235-6.p',unknown),
[] ).
cnf(4,axiom,
( ~ member(u,v)
| ~ subclass(v,w)
| member(u,w) ),
file('SET235-6.p',unknown),
[] ).
cnf(5,axiom,
( subclass(u,v)
| member(not_subclass_element(u,v),u) ),
file('SET235-6.p',unknown),
[] ).
cnf(20,axiom,
( ~ member(u,cross_product(v,w))
| equal(ordered_pair(first(u),second(u)),u) ),
file('SET235-6.p',unknown),
[] ).
cnf(119,plain,
member(not_subclass_element(x__dfg,y__dfg),x__dfg),
inference(res,[status(thm),theory(equality)],[5,3]),
[iquote('0:Res:5.1,3.0')] ).
cnf(121,plain,
( ~ member(u,x__dfg)
| member(u,cross_product(universal_class,universal_class)) ),
inference(res,[status(thm),theory(equality)],[1,4]),
[iquote('0:Res:1.0,4.0')] ).
cnf(1031,plain,
( ~ member(u,x__dfg)
| equal(ordered_pair(first(u),second(u)),u) ),
inference(res,[status(thm),theory(equality)],[121,20]),
[iquote('0:Res:121.1,20.0')] ).
cnf(15414,plain,
( ~ member(not_subclass_element(x__dfg,y__dfg),x__dfg)
| ~ member(not_subclass_element(x__dfg,y__dfg),x__dfg) ),
inference(spl,[status(thm),theory(equality)],[1031,2]),
[iquote('0:SpL:1031.1,2.0')] ).
cnf(15430,plain,
~ member(not_subclass_element(x__dfg,y__dfg),x__dfg),
inference(obv,[status(thm),theory(equality)],[15414]),
[iquote('0:Obv:15414.0')] ).
cnf(15431,plain,
$false,
inference(mrr,[status(thm)],[15430,119]),
[iquote('0:MRR:15430.0,119.0')] ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.13 % Problem : SET235-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.07/0.14 % Command : run_spass %d %s
% 0.13/0.35 % Computer : n016.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 03:24:27 EDT 2022
% 0.13/0.35 % CPUTime :
% 4.25/4.47
% 4.25/4.47 SPASS V 3.9
% 4.25/4.47 SPASS beiseite: Proof found.
% 4.25/4.47 % SZS status Theorem
% 4.25/4.47 Problem: /export/starexec/sandbox/benchmark/theBenchmark.p
% 4.25/4.47 SPASS derived 12288 clauses, backtracked 401 clauses, performed 5 splits and kept 5896 clauses.
% 4.25/4.47 SPASS allocated 89588 KBytes.
% 4.25/4.47 SPASS spent 0:00:03.99 on the problem.
% 4.25/4.47 0:00:00.04 for the input.
% 4.25/4.47 0:00:00.00 for the FLOTTER CNF translation.
% 4.25/4.47 0:00:00.14 for inferences.
% 4.25/4.47 0:00:00.12 for the backtracking.
% 4.25/4.47 0:00:03.59 for the reduction.
% 4.25/4.47
% 4.25/4.47
% 4.25/4.47 Here is a proof with depth 3, length 12 :
% 4.25/4.47 % SZS output start Refutation
% See solution above
% 4.25/4.47 Formulae used in the proof : prove_cross_product_property10_1 prove_cross_product_property10_2 prove_cross_product_property10_3 subclass_members not_subclass_members1 cartesian_product4
% 4.25/4.47
%------------------------------------------------------------------------------