%------------------------------------------------------------------------------
% File : SPASS---3.9
% Problem : LCL440-2 : TPTP v9.3.1. Released v3.2.0.
% Transfm : none
% Format : tptp
% Command : run_spass %d %s
% Computer : n028.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8046.5625MB
% OS : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Mon Sep 7 01:07:32 PM UTC 2026
% Result : Unsatisfiable 0.24s 0.48s
% Output : Refutation 0.24s
% Verified :
% SZS Type : Refutation
% Derivation depth : 1
% Number of leaves : 2
% Syntax : Number of clauses : 3 ( 3 unt; 0 nHn; 3 RR)
% Number of literals : 3 ( 0 equ; 1 neg)
% Maximal clause size : 1 ( 1 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-3 aty)
% Number of functors : 9 ( 9 usr; 6 con; 0-3 aty)
% Number of variables : 0 ( 0 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(1,axiom,
c_in(c_PropLog_Opl_Oop_A_N_62(u,u,v),c_PropLog_Othms(w,v),tc_PropLog_Opl(v)),
file('LCL440-2.p',unknown),
[] ).
cnf(2,axiom,
~ c_in(c_PropLog_Opl_Oop_A_N_62(c_PropLog_Opl_Ofalse,c_PropLog_Opl_Ofalse,t_a),c_PropLog_Othms(c_emptyset,t_a),tc_PropLog_Opl(t_a)),
file('LCL440-2.p',unknown),
[] ).
cnf(3,plain,
$false,
inference(mrr,[status(thm)],[2,1]),
[iquote('0:MRR:2.0,1.0')] ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : LCL440-2 : TPTP v9.3.1. Released v3.2.0.
% 0.00/0.04 % Command : run_spass %d %s
% 0.10/0.36 % Computer : n028.cluster.edu
% 0.10/0.36 % Model : x86_64 x86_64
% 0.10/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.36 % Memory : 8046.5625MB
% 0.10/0.36 % OS : Linux 6.8.0-71-generic
% 0.10/0.36 % CPULimit : 300
% 0.10/0.36 % WCLimit : 300
% 0.10/0.36 % DateTime : Fri Sep 4 15:51:58 UTC 2026
% 0.10/0.37 % CPUTime :
% 0.24/0.48
% 0.24/0.48 SPASS V 3.9
% 0.24/0.48 SPASS beiseite: Proof found.
% 0.24/0.48 % SZS status Theorem
% 0.24/0.48 Problem: /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.24/0.48 SPASS derived 0 clauses, backtracked 0 clauses, performed 0 splits and kept 2 clauses.
% 0.24/0.48 SPASS allocated 63076 KBytes.
% 0.24/0.48 SPASS spent 0:00:00.10 on the problem.
% 0.24/0.48 0:00:00.06 for the input.
% 0.24/0.48 0:00:00.00 for the FLOTTER CNF translation.
% 0.24/0.48 0:00:00.00 for inferences.
% 0.24/0.48 0:00:00.00 for the backtracking.
% 0.24/0.48 0:00:00.00 for the reduction.
% 0.24/0.48
% 0.24/0.48
% 0.24/0.48 Here is a proof with depth 0, length 3 :
% 0.24/0.48 % SZS output start Refutation
% See solution above
% 0.24/0.48 Formulae used in the proof : cls_PropLog_Othms__I_0 cls_conjecture_0
% 0.24/0.48
%------------------------------------------------------------------------------