TSTP Solution File: SET878+1 by SPASS---3.9
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%------------------------------------------------------------------------------
% File : SPASS---3.9
% Problem : SET878+1 : TPTP v8.1.0. Released v3.2.0.
% 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 05:29:31 EDT 2022
% Result : Theorem 0.22s 0.45s
% Output : Refutation 0.22s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 5
% Syntax : Number of clauses : 12 ( 7 unt; 0 nHn; 12 RR)
% Number of literals : 18 ( 0 equ; 11 neg)
% Maximal clause size : 3 ( 1 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of predicates : 3 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 9 ( 9 usr; 6 con; 0-2 aty)
% Number of variables : 0 ( 0 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(4,axiom,
equal(unordered_pair(u,v),unordered_pair(v,u)),
file('SET878+1.p',unknown),
[] ).
cnf(5,axiom,
equal(set_intersection2(u,v),set_intersection2(v,u)),
file('SET878+1.p',unknown),
[] ).
cnf(7,axiom,
~ equal(set_intersection2(singleton(skc5),unordered_pair(skc5,skc4)),singleton(skc5)),
file('SET878+1.p',unknown),
[] ).
cnf(8,axiom,
( ~ in(u,v)
| equal(set_intersection2(v,singleton(u)),singleton(u)) ),
file('SET878+1.p',unknown),
[] ).
cnf(10,axiom,
( ~ equal(u,v)
| ~ equal(w,unordered_pair(x,v))
| in(u,w) ),
file('SET878+1.p',unknown),
[] ).
cnf(15,plain,
~ equal(set_intersection2(singleton(skc5),unordered_pair(skc4,skc5)),singleton(skc5)),
inference(rew,[status(thm),theory(equality)],[4,7]),
[iquote('0:Rew:4.0,7.0')] ).
cnf(32,plain,
( ~ in(u,v)
| equal(set_intersection2(singleton(u),v),singleton(u)) ),
inference(spr,[status(thm),theory(equality)],[8,5]),
[iquote('0:SpR:8.1,5.0')] ).
cnf(40,plain,
( ~ in(skc5,unordered_pair(skc4,skc5))
| ~ equal(singleton(skc5),singleton(skc5)) ),
inference(spl,[status(thm),theory(equality)],[32,15]),
[iquote('0:SpL:32.1,15.0')] ).
cnf(41,plain,
~ in(skc5,unordered_pair(skc4,skc5)),
inference(obv,[status(thm),theory(equality)],[40]),
[iquote('0:Obv:40.1')] ).
cnf(42,plain,
( ~ equal(u,v)
| in(u,unordered_pair(w,v)) ),
inference(eqr,[status(thm),theory(equality)],[10]),
[iquote('0:EqR:10.1')] ).
cnf(48,plain,
~ equal(skc5,skc5),
inference(res,[status(thm),theory(equality)],[42,41]),
[iquote('0:Res:42.1,41.0')] ).
cnf(49,plain,
$false,
inference(obv,[status(thm),theory(equality)],[48]),
[iquote('0:Obv:48.0')] ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12 % Problem : SET878+1 : TPTP v8.1.0. Released v3.2.0.
% 0.07/0.13 % Command : run_spass %d %s
% 0.14/0.35 % Computer : n006.cluster.edu
% 0.14/0.35 % Model : x86_64 x86_64
% 0.14/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.35 % Memory : 8042.1875MB
% 0.14/0.35 % OS : Linux 3.10.0-693.el7.x86_64
% 0.14/0.35 % CPULimit : 300
% 0.14/0.35 % WCLimit : 600
% 0.14/0.35 % DateTime : Sat Jul 9 23:35:51 EDT 2022
% 0.14/0.35 % CPUTime :
% 0.22/0.45
% 0.22/0.45 SPASS V 3.9
% 0.22/0.45 SPASS beiseite: Proof found.
% 0.22/0.45 % SZS status Theorem
% 0.22/0.45 Problem: /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.22/0.45 SPASS derived 30 clauses, backtracked 0 clauses, performed 0 splits and kept 23 clauses.
% 0.22/0.45 SPASS allocated 85200 KBytes.
% 0.22/0.45 SPASS spent 0:00:00.09 on the problem.
% 0.22/0.45 0:00:00.03 for the input.
% 0.22/0.45 0:00:00.03 for the FLOTTER CNF translation.
% 0.22/0.45 0:00:00.00 for inferences.
% 0.22/0.45 0:00:00.00 for the backtracking.
% 0.22/0.45 0:00:00.00 for the reduction.
% 0.22/0.45
% 0.22/0.45
% 0.22/0.45 Here is a proof with depth 3, length 12 :
% 0.22/0.45 % SZS output start Refutation
% See solution above
% 0.22/0.45 Formulae used in the proof : commutativity_k2_tarski commutativity_k3_xboole_0 t19_zfmisc_1 l32_zfmisc_1 d2_tarski idempotence_k3_xboole_0
% 0.22/0.45
%------------------------------------------------------------------------------