%------------------------------------------------------------------------------
% File : SPASS---3.9
% Problem : LCL172-1 : TPTP v9.3.1. Released v1.1.0.
% 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 01:06:55 PM UTC 2026
% Result : Unsatisfiable 0.22s 0.48s
% Output : Refutation 0.22s
% Verified :
% SZS Type : Refutation
% Derivation depth : 2
% Number of leaves : 3
% Syntax : Number of clauses : 5 ( 4 unt; 0 nHn; 5 RR)
% Number of literals : 6 ( 0 equ; 3 neg)
% Maximal clause size : 2 ( 1 avg)
% Maximal term depth : 6 ( 2 avg)
% Number of predicates : 3 ( 2 usr; 1 prp; 0-1 aty)
% Number of functors : 8 ( 8 usr; 6 con; 0-2 aty)
% Number of variables : 0 ( 0 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(1,axiom,
~ theorem(or__dfg(not__dfg(or__dfg(not__dfg(p),or__dfg(not__dfg(q),r))),or__dfg(not__dfg(q),or__dfg(not__dfg(p),r)))),
file('LCL172-1.p',unknown),
[] ).
cnf(5,axiom,
axiom(or__dfg(not__dfg(or__dfg(u,or__dfg(v,w))),or__dfg(v,or__dfg(u,w)))),
file('LCL172-1.p',unknown),
[] ).
cnf(7,axiom,
( ~ axiom(u)
| theorem(u) ),
file('LCL172-1.p',unknown),
[] ).
cnf(10,plain,
~ axiom(or__dfg(not__dfg(or__dfg(not__dfg(p),or__dfg(not__dfg(q),r))),or__dfg(not__dfg(q),or__dfg(not__dfg(p),r)))),
inference(res,[status(thm),theory(equality)],[7,1]),
[iquote('0:Res:7.1,1.0')] ).
cnf(13,plain,
$false,
inference(mrr,[status(thm)],[10,5]),
[iquote('0:MRR:10.0,5.0')] ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : LCL172-1 : TPTP v9.3.1. Released v1.1.0.
% 0.00/0.03 % Command : run_spass %d %s
% 0.09/0.36 % Computer : n028.cluster.edu
% 0.09/0.36 % Model : x86_64 x86_64
% 0.09/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.36 % Memory : 8046.5625MB
% 0.09/0.36 % OS : Linux 6.8.0-71-generic
% 0.09/0.36 % CPULimit : 300
% 0.09/0.36 % WCLimit : 300
% 0.09/0.36 % DateTime : Fri Sep 4 22:06:13 UTC 2026
% 0.09/0.37 % CPUTime :
% 0.22/0.48
% 0.22/0.48 SPASS V 3.9
% 0.22/0.48 SPASS beiseite: Proof found.
% 0.22/0.48 % SZS status Theorem
% 0.22/0.48 Problem: /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.22/0.48 SPASS derived 2 clauses, backtracked 0 clauses, performed 0 splits and kept 10 clauses.
% 0.22/0.48 SPASS allocated 75614 KBytes.
% 0.22/0.48 SPASS spent 0:00:00.10 on the problem.
% 0.22/0.48 0:00:00.06 for the input.
% 0.22/0.48 0:00:00.00 for the FLOTTER CNF translation.
% 0.22/0.48 0:00:00.00 for inferences.
% 0.22/0.48 0:00:00.00 for the backtracking.
% 0.22/0.48 0:00:00.00 for the reduction.
% 0.22/0.48
% 0.22/0.48
% 0.22/0.48 Here is a proof with depth 1, length 5 :
% 0.22/0.48 % SZS output start Refutation
% See solution above
% 0.22/0.48 Formulae used in the proof : prove_this axiom_1_5 rule_1
% 0.22/0.48
%------------------------------------------------------------------------------