TSTP Solution File: PUZ035-7 by SPASS---3.9
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%------------------------------------------------------------------------------
% File : SPASS---3.9
% Problem : PUZ035-7 : TPTP v8.1.0. Released v2.0.0.
% Transfm : none
% Format : tptp
% Command : run_spass %d %s
% Computer : n024.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 : Mon Jul 18 18:27:21 EDT 2022
% Result : Unsatisfiable 0.12s 0.40s
% Output : Refutation 0.12s
% Verified :
% SZS Type : Refutation
% Derivation depth : 6
% Number of leaves : 3
% Syntax : Number of clauses : 9 ( 3 unt; 2 nHn; 9 RR)
% Number of literals : 17 ( 0 equ; 9 neg)
% Maximal clause size : 3 ( 1 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of predicates : 3 ( 2 usr; 1 prp; 0-3 aty)
% Number of functors : 11 ( 11 usr; 9 con; 0-2 aty)
% Number of variables : 0 ( 0 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(1,axiom,
( truth(isa(u,knave))
| truth(isa(u,knight)) ),
file('PUZ035-7.p',unknown),
[] ).
cnf(7,axiom,
( reply(u,v,no)
| reply(u,v,yes) ),
file('PUZ035-7.p',unknown),
[] ).
cnf(14,axiom,
( ~ truth(isa(other,u))
| ~ truth(isa(asked,v))
| ~ reply(asked,or__dfg(isa(asked,knight),isa(other,knight)),w) ),
file('PUZ035-7.p',unknown),
[] ).
cnf(45,plain,
( ~ truth(isa(other,u))
| ~ truth(isa(asked,v))
| reply(asked,or__dfg(isa(asked,knight),isa(other,knight)),no) ),
inference(res,[status(thm),theory(equality)],[7,14]),
[iquote('0:Res:7.1,14.2')] ).
cnf(49,plain,
( ~ truth(isa(other,u))
| ~ truth(isa(asked,v)) ),
inference(mrr,[status(thm)],[45,14]),
[iquote('0:MRR:45.2,14.2')] ).
cnf(52,plain,
( ~ truth(isa(asked,u))
| truth(isa(other,knave)) ),
inference(res,[status(thm),theory(equality)],[1,49]),
[iquote('0:Res:1.1,49.0')] ).
cnf(53,plain,
~ truth(isa(asked,u)),
inference(mrr,[status(thm)],[52,49]),
[iquote('0:MRR:52.1,49.0')] ).
cnf(54,plain,
truth(isa(asked,knave)),
inference(res,[status(thm),theory(equality)],[1,53]),
[iquote('0:Res:1.1,53.0')] ).
cnf(55,plain,
$false,
inference(mrr,[status(thm)],[54,53]),
[iquote('0:MRR:54.0,53.0')] ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.10/0.11 % Problem : PUZ035-7 : TPTP v8.1.0. Released v2.0.0.
% 0.10/0.12 % Command : run_spass %d %s
% 0.12/0.33 % Computer : n024.cluster.edu
% 0.12/0.33 % Model : x86_64 x86_64
% 0.12/0.33 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33 % Memory : 8042.1875MB
% 0.12/0.33 % OS : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33 % CPULimit : 300
% 0.12/0.33 % WCLimit : 600
% 0.12/0.33 % DateTime : Sat May 28 20:23:51 EDT 2022
% 0.12/0.33 % CPUTime :
% 0.12/0.40
% 0.12/0.40 SPASS V 3.9
% 0.12/0.40 SPASS beiseite: Proof found.
% 0.12/0.40 % SZS status Theorem
% 0.12/0.40 Problem: /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.12/0.40 SPASS derived 24 clauses, backtracked 0 clauses, performed 0 splits and kept 21 clauses.
% 0.12/0.40 SPASS allocated 75616 KBytes.
% 0.12/0.40 SPASS spent 0:00:00.06 on the problem.
% 0.12/0.40 0:00:00.03 for the input.
% 0.12/0.40 0:00:00.00 for the FLOTTER CNF translation.
% 0.12/0.40 0:00:00.00 for inferences.
% 0.12/0.40 0:00:00.00 for the backtracking.
% 0.12/0.40 0:00:00.00 for the reduction.
% 0.12/0.40
% 0.12/0.40
% 0.12/0.40 Here is a proof with depth 3, length 9 :
% 0.12/0.40 % SZS output start Refutation
% See solution above
% 0.12/0.40 Formulae used in the proof : everyone_a_knight_or_knave yes_or_no prove_answer
% 0.12/0.40
%------------------------------------------------------------------------------