%------------------------------------------------------------------------------
% File : iProver---3.9.4
% Problem : PUZ035-4 : TPTP v9.3.1. Released v2.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_iprover 300 /export/starexec/sandbox2/benchmark/theBenchmark.p THM
% Computer : n008.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 : Fri Sep 25 02:32:47 PM UTC 2026
% Result : Unsatisfiable 1.78s 1.29s
% Output : CNFRefutation 1.78s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 5
% Syntax : Number of formulae : 27 ( 5 unt; 0 def)
% Number of atoms : 55 ( 0 equ)
% Maximal formula atoms : 3 ( 2 avg)
% Number of connectives : 60 ( 32 ~; 28 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 7 ( 3 avg)
% Maximal term depth : 4 ( 1 avg)
% Number of types : 1 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of predicates : 7 ( 6 usr; 4 prp; 0-2 aty)
% Number of functors : 7 ( 7 usr; 4 con; 0-2 aty)
% Number of variables : 14 ( 0 sgn 14 !; 0 ?; 10 :)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X0] :
( truth(isa(X0,knave))
| truth(isa(X0,knight))
| ~ person(X0) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',everyone_a_knight_or_knave) ).
fof(f5,axiom,
( says(asked,not(or(isa(asked,knight),isa(other,knight))))
| says(asked,or(isa(asked,knight),isa(other,knight))) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',one_is_knight_answer) ).
fof(f12,axiom,
person(asked),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',asked_person) ).
fof(f13,axiom,
person(other),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',other_person) ).
fof(f14,negated_conjecture,
! [X2,X0,X1] :
( ~ says(asked,X2)
| ~ truth(isa(other,X1))
| ~ truth(isa(asked,X0)) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_answer) ).
tcf(c_63,plain,
! [X0: $i] :
( truth(isa(X0,knave))
| truth(isa(X0,knight))
| ~ person(X0) ),
inference(cnf_transformation,[],[f1]) ).
tcf(c_67,plain,
( says(asked,or(isa(asked,knight),isa(other,knight)))
| says(asked,not(or(isa(asked,knight),isa(other,knight)))) ),
inference(cnf_transformation,[],[f5]) ).
tcf(c_74,plain,
person(asked),
inference(cnf_transformation,[],[f12]) ).
tcf(c_75,plain,
person(other),
inference(cnf_transformation,[],[f13]) ).
tcf(c_76,negated_conjecture,
! [X0: $i,X1: $i,X2: $i] :
( ~ says(asked,X2)
| ~ truth(isa(other,X1))
| ~ truth(isa(asked,X0)) ),
inference(cnf_transformation,[],[f14]) ).
tcf(c_153,plain,
( truth(isa(asked,knave))
| truth(isa(asked,knight)) ),
inference(resolution,[status(thm)],[c_63,c_74]) ).
tcf(c_160,plain,
( truth(isa(other,knave))
| truth(isa(other,knight)) ),
inference(resolution,[status(thm)],[c_63,c_75]) ).
tcf(c_235,negated_conjecture,
! [X0: $i] :
( ~ iPr_def_10
| ~ truth(isa(other,X0)) ),
inference(splitting,[splitting(split),new_symbols(definition,[iPr_def_10])],[c_76]) ).
tcf(c_236,negated_conjecture,
! [X0: $i] :
( ~ iPr_def_11
| ~ says(asked,X0) ),
inference(splitting,[splitting(split),new_symbols(definition,[iPr_def_11])],[c_76]) ).
tcf(c_237,negated_conjecture,
! [X0: $i] :
( ~ iPr_def_12
| ~ truth(isa(asked,X0)) ),
inference(splitting,[splitting(split),new_symbols(definition,[iPr_def_12])],[c_76]) ).
tcf(c_238,negated_conjecture,
( iPr_def_12
| iPr_def_11
| iPr_def_10 ),
inference(splitting,[splitting(split),new_symbols(definition,[])],[c_76]) ).
tcf(c_239,negated_conjecture,
( iPr_def_12
| iPr_def_11
| iPr_def_10 ),
inference(demodulation,[status(thm)],[c_238]) ).
tcf(c_240,negated_conjecture,
! [X0: $i] :
( ~ iPr_def_12
| ~ truth(isa(asked,X0)) ),
inference(demodulation,[status(thm)],[c_237]) ).
tcf(c_241,negated_conjecture,
! [X0: $i] :
( ~ iPr_def_11
| ~ says(asked,X0) ),
inference(demodulation,[status(thm)],[c_236]) ).
tcf(c_242,negated_conjecture,
! [X0: $i] :
( ~ iPr_def_10
| ~ truth(isa(other,X0)) ),
inference(demodulation,[status(thm)],[c_235]) ).
tcf(c_244,plain,
( ~ iPr_def_10
| ~ truth(isa(other,knight)) ),
inference(instantiation,[status(thm)],[c_242]) ).
tcf(c_245,plain,
( ~ iPr_def_12
| ~ truth(isa(asked,knight)) ),
inference(instantiation,[status(thm)],[c_240]) ).
tcf(c_246,plain,
( ~ iPr_def_10
| ~ truth(isa(other,knave)) ),
inference(instantiation,[status(thm)],[c_242]) ).
tcf(c_267,plain,
( ~ iPr_def_11
| ~ says(asked,or(isa(asked,knight),isa(other,knight))) ),
inference(instantiation,[status(thm)],[c_241]) ).
tcf(c_272,plain,
( ~ iPr_def_11
| ~ says(asked,not(or(isa(asked,knight),isa(other,knight)))) ),
inference(instantiation,[status(thm)],[c_241]) ).
tcf(c_305,plain,
( ~ iPr_def_12
| ~ truth(isa(asked,knave)) ),
inference(instantiation,[status(thm)],[c_240]) ).
tcf(c_306,plain,
$false,
inference(prop_impl_just,[status(thm)],[c_305,c_272,c_267,c_246,c_245,c_244,c_239,c_160,c_153,c_67]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : PUZ035-4 : TPTP v9.3.1. Released v2.0.0.
% 0.00/0.05 % Command : run_iprover 300 /export/starexec/sandbox2/benchmark/theBenchmark.p THM
% 0.13/0.38 % Computer : n008.cluster.edu
% 0.13/0.38 % Model : x86_64 x86_64
% 0.13/0.38 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.38 % Memory : 8046.5625MB
% 0.13/0.38 % OS : Linux 6.8.0-71-generic
% 0.13/0.38 % CPULimit : 300
% 0.13/0.38 % WCLimit : 300
% 0.13/0.38 % DateTime : Thu Sep 24 06:44:39 UTC 2026
% 0.13/0.38 % CPUTime :
% 0.13/0.38 Running run_iprover 300 /export/starexec/sandbox2/benchmark/theBenchmark.p THM
% 0.13/0.41 Running first-order theorem proving
% 0.13/0.41 Running: /export/starexec/sandbox2/solver/bin/iproveropt-multi-core.sh -d -n -l tptp -s fof_schedule -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.13/0.42
% 0.13/0.42 % ======== iProver multi-core TPTP/SMT =========
% 0.13/0.42
% 0.13/0.42 % Detected problem language: tptp
% 0.13/0.43 % Proving...
% 1.78/1.29 % SZS status Started for theBenchmark.p
% 1.78/1.29 % SZS status Unsatisfiable for theBenchmark.p
% 1.78/1.29
% 1.78/1.29 %---------------- iProver v3.9.4 (pre CASC 2026/SMT-COMP 2026) ----------------%
% 1.78/1.29
% 1.78/1.29 % ------ iProver source info
% 1.78/1.29
% 1.78/1.29 % git: date: 2026-07-19 20:42:38 +0200
% 1.78/1.29 % git: sha1: 804e7d636a263075307957e923b7a22a4035de61
% 1.78/1.29 % git: non_committed_changes: false
% 1.78/1.29
% 1.78/1.29 % ------ Parsing...% successful
% 1.78/1.29
% 1.78/1.29
% 1.78/1.29 % ------ Clausification by vclausify_rel & Parsing by iProver...%
% 1.78/1.29
% 1.78/1.29 % ------ Preprocessing... sf_s rm: 0 0s sf_e pe_s pe:1:0s pe_e sf_s rm: 0 0s sf_e pe_s pe_e %
% 1.78/1.29
% 1.78/1.29 % ------ Preprocessing... gs_s sp: 3 0s gs_e snvd_s sp: 0 0s snvd_e
% 1.78/1.29 % ------ Proving...
% 1.78/1.29 % ------ Problem Properties
% 1.78/1.29
% 1.78/1.29 %
% 1.78/1.29 % clauses 16
% 1.78/1.29 % conjectures 4
% 1.78/1.29 % EPR 2
% 1.78/1.29 % Horn 9
% 1.78/1.29 % unary 0
% 1.78/1.29 % binary 10
% 1.78/1.29 % lits 38
% 1.78/1.29 % lits eq 0
% 1.78/1.29 % fd_pure 0
% 1.78/1.29 % fd_pseudo 0
% 1.78/1.29 % fd_cond 0
% 1.78/1.29 % fd_pseudo_cond 0
% 1.78/1.29 % AC symbols 0
% 1.78/1.29
% 1.78/1.29 % ------ Schedule dynamic 5 is on
% 1.78/1.29
% 1.78/1.29 % ------ no equalities: superposition off
% 1.78/1.29
% 1.78/1.29 % ------ Input Options "--resolution_flag false --inst_lit_sel_side none" Time Limit: 10.
% 1.78/1.29
% 1.78/1.29
% 1.78/1.29 % ------
% 1.78/1.29 % Current options:
% 1.78/1.29 % ------
% 1.78/1.29
% 1.78/1.29
% 1.78/1.29 %
% 1.78/1.29
% 1.78/1.29 % ------ Proving...
% 1.78/1.29 %
% 1.78/1.29
% 1.78/1.29 % SZS status Unsatisfiable for theBenchmark.p
% 1.78/1.29
% 1.78/1.29 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
% 1.78/1.29
% 1.78/1.29
%------------------------------------------------------------------------------