%------------------------------------------------------------------------------
% File : iProver---3.9.4
% Problem : PLA017-1 : TPTP v9.3.1. Released v1.1.0.
% Transfm : none
% Format : tptp:raw
% Command : run_iprover 300 /export/starexec/sandbox/benchmark/theBenchmark.p THM
% Computer : n012.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 02:31:00 PM UTC 2026
% Result : Unsatisfiable 0.22s 1.09s
% Output : CNFRefutation 0.22s
% Verified :
% SZS Type : Refutation
% Derivation depth : 8
% Number of leaves : 11
% Syntax : Number of formulae : 30 ( 16 unt; 1 def)
% Number of atoms : 61 ( 1 equ)
% Maximal formula atoms : 5 ( 2 avg)
% Number of connectives : 64 ( 36 ~; 28 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 7 ( 3 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of types : 1 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of predicates : 5 ( 3 usr; 2 prp; 0-2 aty)
% Number of functors : 11 ( 11 usr; 5 con; 0-2 aty)
% Number of variables : 29 ( 0 sgn 29 !; 0 ?; 18 :)
% Comments :
%------------------------------------------------------------------------------
fof(f2,axiom,
! [X0,X1] :
( ~ differ(X0,table)
| ~ holds(clear(X0),X1)
| ~ holds(empty,X1)
| holds(holding(X0),do(pickup(X0),X1)) ),
file('/export/starexec/sandbox/benchmark/Axioms/PLA001-0.ax',pickup_1) ).
fof(f5,axiom,
! [X2,X0,X1] :
( ~ differ(X0,X1)
| ~ holds(clear(X0),X2)
| holds(clear(X0),do(pickup(X1),X2)) ),
file('/export/starexec/sandbox/benchmark/Axioms/PLA001-0.ax',pickup_4) ).
fof(f7,axiom,
! [X2,X0,X1] :
( ~ holds(clear(X1),X2)
| ~ holds(holding(X0),X2)
| holds(on(X0,X1),do(putdown(X0,X1),X2)) ),
file('/export/starexec/sandbox/benchmark/Axioms/PLA001-0.ax',putdown_2) ).
fof(f11,axiom,
! [X0,X1] :
( ~ differ(X1,X0)
| differ(X0,X1) ),
file('/export/starexec/sandbox/benchmark/Axioms/PLA001-1.ax',symmetry_of_differ) ).
fof(f13,axiom,
differ(a,c),
file('/export/starexec/sandbox/benchmark/Axioms/PLA001-1.ax',differ_a_c) ).
fof(f15,axiom,
differ(a,table),
file('/export/starexec/sandbox/benchmark/Axioms/PLA001-1.ax',differ_a_table) ).
fof(f26,axiom,
holds(clear(a),s0),
file('/export/starexec/sandbox/benchmark/Axioms/PLA001-1.ax',initial_state5) ).
fof(f28,axiom,
holds(clear(c),s0),
file('/export/starexec/sandbox/benchmark/Axioms/PLA001-1.ax',initial_state7) ).
fof(f29,axiom,
holds(empty,s0),
file('/export/starexec/sandbox/benchmark/Axioms/PLA001-1.ax',initial_state8) ).
fof(f31,negated_conjecture,
! [X0] : ~ holds(on(a,c),X0),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_AC) ).
tcf(c_81,plain,
! [X0: $i,X1: $i] :
( holds(holding(X0),do(pickup(X0),X1))
| ~ differ(X0,table)
| ~ holds(empty,X1)
| ~ holds(clear(X0),X1) ),
inference(cnf_transformation,[],[f2]) ).
tcf(c_84,plain,
! [X0: $i,X1: $i,X2: $i] :
( holds(clear(X0),do(pickup(X2),X1))
| ~ differ(X0,X2)
| ~ holds(clear(X0),X1) ),
inference(cnf_transformation,[],[f5]) ).
tcf(c_86,plain,
! [X0: $i,X1: $i,X2: $i] :
( holds(on(X2,X0),do(putdown(X2,X0),X1))
| ~ holds(holding(X2),X1)
| ~ holds(clear(X0),X1) ),
inference(cnf_transformation,[],[f7]) ).
tcf(c_90,plain,
! [X0: $i,X1: $i] :
( differ(X1,X0)
| ~ differ(X0,X1) ),
inference(cnf_transformation,[],[f11]) ).
tcf(c_92,plain,
differ(a,c),
inference(cnf_transformation,[],[f13]) ).
tcf(c_94,plain,
differ(a,table),
inference(cnf_transformation,[],[f15]) ).
tcf(c_105,plain,
holds(clear(a),s0),
inference(cnf_transformation,[],[f26]) ).
tcf(c_107,plain,
holds(clear(c),s0),
inference(cnf_transformation,[],[f28]) ).
tcf(c_108,plain,
holds(empty,s0),
inference(cnf_transformation,[],[f29]) ).
tcf(c_110,negated_conjecture,
! [X0: $i] : ~ holds(on(a,c),X0),
inference(cnf_transformation,[],[f31]) ).
tcf(c_329,definition,
iPr_def_10 = on(a,c),
introduced(definition,[new_symbols(definition,[iPr_def_10])],[]) ).
tcf(c_330,negated_conjecture,
! [X0: $i] : ~ holds(iPr_def_10,X0),
inference(demodulation,[status(thm)],[c_110,c_329]) ).
tcf(c_630,plain,
differ(c,a),
inference(superposition,[status(thm)],[c_92,c_90]) ).
tcf(c_701,plain,
! [X0: $i] :
( holds(iPr_def_10,do(putdown(a,c),X0))
| ~ holds(holding(a),X0)
| ~ holds(clear(c),X0) ),
inference(superposition,[status(thm)],[c_329,c_86]) ).
tcf(c_702,plain,
! [X0: $i] :
( ~ holds(holding(a),X0)
| ~ holds(clear(c),X0) ),
inference(forward_subsumption_resolution,[status(thm)],[c_701,c_330]) ).
tcf(c_711,plain,
! [X0: $i,X1: $i] :
( ~ differ(c,X0)
| ~ holds(clear(c),X1)
| ~ holds(holding(a),do(pickup(X0),X1)) ),
inference(superposition,[status(thm)],[c_84,c_702]) ).
tcf(c_752,plain,
! [X0: $i] :
( ~ differ(c,a)
| ~ differ(a,table)
| ~ holds(empty,X0)
| ~ holds(clear(c),X0)
| ~ holds(clear(a),X0) ),
inference(superposition,[status(thm)],[c_81,c_711]) ).
tcf(c_753,plain,
! [X0: $i] :
( ~ holds(empty,X0)
| ~ holds(clear(c),X0)
| ~ holds(clear(a),X0) ),
inference(forward_subsumption_resolution,[status(thm)],[c_752,c_630,c_94]) ).
tcf(c_764,plain,
( ~ holds(empty,s0)
| ~ holds(clear(a),s0) ),
inference(superposition,[status(thm)],[c_107,c_753]) ).
tcf(c_769,plain,
$false,
inference(forward_subsumption_resolution,[status(thm)],[c_764,c_108,c_105]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : PLA017-1 : TPTP v9.3.1. Released v1.1.0.
% 0.00/0.02 % Command : run_iprover 300 /export/starexec/sandbox/benchmark/theBenchmark.p THM
% 0.05/0.32 % Computer : n012.cluster.edu
% 0.05/0.32 % Model : x86_64 x86_64
% 0.05/0.32 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.05/0.32 % Memory : 8046.5625MB
% 0.05/0.32 % OS : Linux 6.8.0-71-generic
% 0.05/0.32 % CPULimit : 300
% 0.05/0.32 % WCLimit : 300
% 0.05/0.32 % DateTime : Thu Sep 24 06:13:21 UTC 2026
% 0.05/0.32 % CPUTime :
% 0.05/0.32 Running run_iprover 300 /export/starexec/sandbox/benchmark/theBenchmark.p THM
% 0.09/0.34 Running first-order theorem proving
% 0.09/0.34 Running: /export/starexec/sandbox/solver/bin/iproveropt-multi-core.sh -d -n -l tptp -s fof_schedule -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.09/0.35
% 0.09/0.35 % ======== iProver multi-core TPTP/SMT =========
% 0.09/0.35
% 0.09/0.35 % Detected problem language: tptp
% 0.09/0.36 % Proving...
% 0.22/1.09 % SZS status Started for theBenchmark.p
% 0.22/1.09 % SZS status Unsatisfiable for theBenchmark.p
% 0.22/1.09
% 0.22/1.09 %---------------- iProver v3.9.4 (pre CASC 2026/SMT-COMP 2026) ----------------%
% 0.22/1.09
% 0.22/1.09 % ------ iProver source info
% 0.22/1.09
% 0.22/1.09 % git: date: 2026-07-19 20:42:38 +0200
% 0.22/1.09 % git: sha1: 804e7d636a263075307957e923b7a22a4035de61
% 0.22/1.09 % git: non_committed_changes: false
% 0.22/1.09
% 0.22/1.09 % ------ Parsing...% successful
% 0.22/1.09
% 0.22/1.09
% 0.22/1.09 % ------ Clausification by vclausify_rel & Parsing by iProver...%
% 0.22/1.09
% 0.22/1.09 % ------ Preprocessing... sf_s rm: 1 0s sf_e pe_s pe_e sf_s rm: 0 0s sf_e pe_s pe_e %
% 0.22/1.09
% 0.22/1.09 % ------ Preprocessing... gs_s sp: 0 0s gs_e snvd_s sp: 0 0s snvd_e %
% 0.22/1.09
% 0.22/1.09 % ------ Preprocessing... sf_s rm: 1 0s sf_e sf_s rm: 0 0s sf_e
% 0.22/1.09 % ------ Proving...
% 0.22/1.09 % ------ Problem Properties
% 0.22/1.09
% 0.22/1.09 %
% 0.22/1.09 % clauses 31
% 0.22/1.09 % conjectures 1
% 0.22/1.09 % EPR 13
% 0.22/1.09 % Horn 31
% 0.22/1.09 % unary 21
% 0.22/1.09 % binary 2
% 0.22/1.09 % lits 51
% 0.22/1.09 % lits eq 1
% 0.22/1.09 % fd_pure 0
% 0.22/1.09 % fd_pseudo 0
% 0.22/1.09 % fd_cond 0
% 0.22/1.09 % fd_pseudo_cond 0
% 0.22/1.09 % AC symbols 0
% 0.22/1.09
% 0.22/1.09 % ------ Schedule dynamic 5 is on
% 0.22/1.09
% 0.22/1.09 % ------ Input Options "--resolution_flag false --inst_lit_sel_side none" Time Limit: 10.
% 0.22/1.09
% 0.22/1.09
% 0.22/1.09 % ------
% 0.22/1.09 % Current options:
% 0.22/1.09 % ------
% 0.22/1.09
% 0.22/1.09
% 0.22/1.09 %
% 0.22/1.09
% 0.22/1.09 % ------ Proving...
% 0.22/1.09 %
% 0.22/1.09
% 0.22/1.09 % SZS status Unsatisfiable for theBenchmark.p
% 0.22/1.09
% 0.22/1.09 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
% 0.22/1.09
% 0.22/1.09
%------------------------------------------------------------------------------