%------------------------------------------------------------------------------
% File : iProver---3.9.4
% Problem : SET061-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : run_iprover 300 /export/starexec/sandbox/benchmark/theBenchmark.p THM
% Computer : n001.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 02:46:18 PM UTC 2026
% Result : Unsatisfiable 4.39s 1.28s
% Output : CNFRefutation 4.39s
% Verified :
% SZS Type : Refutation
% Derivation depth : 8
% Number of leaves : 4
% Syntax : Number of formulae : 16 ( 6 unt; 0 def)
% Number of atoms : 27 ( 10 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 20 ( 9 ~; 11 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 6 ( 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 : 3 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 5 ( 5 usr; 2 con; 0-2 aty)
% Number of variables : 18 ( 0 sgn 18 !; 0 ?; 11 :)
% Comments :
%------------------------------------------------------------------------------
fof(f21,axiom,
! [X2,X0,X1] :
( member(X0,X1)
| ~ member(X0,intersection(X1,X2)) ),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',intersection1) ).
fof(f24,axiom,
! [X0,X1] :
( ~ member(X0,X1)
| ~ member(X0,complement(X1)) ),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',complement1) ).
fof(f69,axiom,
! [X0] :
( intersection(X0,regular(X0)) = null_class
| X0 = null_class ),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',regularity2) ).
fof(f70,plain,
! [X0] :
( null_class = intersection(X0,regular(X0))
| null_class = X0 ),
inference(reorient_equations,[],[f69]) ).
fof(f101,negated_conjecture,
member(z,null_class),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_existence_of_null_class_1) ).
tcf(c_159,plain,
! [X0: $i,X1: $i,X2: $i] :
( member(X0,X1)
| ~ member(X0,intersection(X1,X2)) ),
inference(cnf_transformation,[],[f21]) ).
tcf(c_162,plain,
! [X0: $i,X1: $i] :
( ~ member(X0,X1)
| ~ member(X0,complement(X1)) ),
inference(cnf_transformation,[],[f24]) ).
tcf(c_194,plain,
! [X0: $i] :
( ( X0 = null_class )
| ( intersection(X0,regular(X0)) = null_class ) ),
inference(cnf_transformation,[],[f70]) ).
tcf(c_216,negated_conjecture,
member(z,null_class),
inference(cnf_transformation,[],[f101]) ).
tcf(c_2637,negated_conjecture,
member(z,null_class),
inference(demodulation,[status(thm)],[c_216]) ).
tcf(c_3427,plain,
! [X0: $i,X1: $i] :
( member(X0,X1)
| ( X1 = null_class )
| ~ member(X0,null_class) ),
inference(superposition,[status(thm)],[c_194,c_159]) ).
tcf(c_3790,plain,
! [X0: $i] :
( member(z,X0)
| ( X0 = null_class ) ),
inference(superposition,[status(thm)],[c_2637,c_3427]) ).
tcf(c_3889,plain,
! [X0: $i] :
( ( complement(X0) = null_class )
| ~ member(z,X0) ),
inference(superposition,[status(thm)],[c_3790,c_162]) ).
tcf(c_4004,plain,
complement(null_class) = null_class,
inference(superposition,[status(thm)],[c_2637,c_3889]) ).
tcf(c_4056,plain,
! [X0: $i] : ~ member(X0,null_class),
inference(superposition,[status(thm)],[c_4004,c_162]) ).
tcf(c_4058,plain,
$false,
inference(backward_subsumption_resolution,[status(thm)],[c_2637,c_4056]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SET061-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.04 % Command : run_iprover 300 /export/starexec/sandbox/benchmark/theBenchmark.p THM
% 0.10/0.36 % Computer : n001.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 : Thu Sep 24 09:35:08 UTC 2026
% 0.10/0.37 % CPUTime :
% 0.10/0.37 Running run_iprover 300 /export/starexec/sandbox/benchmark/theBenchmark.p THM
% 0.10/0.40 Running first-order theorem proving
% 0.10/0.40 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
% 0.10/0.41
% 0.10/0.41 % ======== iProver multi-core TPTP/SMT =========
% 0.10/0.41
% 0.10/0.41 % Detected problem language: tptp
% 0.10/0.42 % Proving...
% 4.39/1.28 % SZS status Started for theBenchmark.p
% 4.39/1.28 % SZS status Unsatisfiable for theBenchmark.p
% 4.39/1.28
% 4.39/1.28 %---------------- iProver v3.9.4 (pre CASC 2026/SMT-COMP 2026) ----------------%
% 4.39/1.28
% 4.39/1.28 % ------ iProver source info
% 4.39/1.28
% 4.39/1.28 % git: date: 2026-07-19 20:42:38 +0200
% 4.39/1.28 % git: sha1: 804e7d636a263075307957e923b7a22a4035de61
% 4.39/1.28 % git: non_committed_changes: false
% 4.39/1.28
% 4.39/1.28 % ------ Parsing...% successful
% 4.39/1.28
% 4.39/1.28
% 4.39/1.28 % ------ Clausification by vclausify_rel & Parsing by iProver...%
% 4.39/1.28
% 4.39/1.28 % ------ Preprocessing... sup_sim: 0 sf_s rm: 1 0s sf_e pe_s pe:1:0s pe:2:0s pe_e sup_sim: 0 sf_s rm: 2 0s sf_e pe_s pe_e %
% 4.39/1.28
% 4.39/1.28 % ------ Preprocessing... gs_s sp: 0 0s gs_e snvd_s sp: 0 0s snvd_e %
% 4.39/1.28
% 4.39/1.28 % ------ Preprocessing... sf_s rm: 1 0s sf_e sf_s rm: 0 0s sf_e
% 4.39/1.28 % ------ Proving...
% 4.39/1.28 % ------ Problem Properties
% 4.39/1.28
% 4.39/1.28 %
% 4.39/1.28 % clauses 68
% 4.39/1.28 % conjectures 1
% 4.39/1.28 % EPR 13
% 4.39/1.28 % Horn 60
% 4.39/1.28 % unary 16
% 4.39/1.28 % binary 32
% 4.39/1.28 % lits 146
% 4.39/1.28 % lits eq 20
% 4.39/1.28 % fd_pure 0
% 4.39/1.28 % fd_pseudo 0
% 4.39/1.28 % fd_cond 3
% 4.39/1.28 % fd_pseudo_cond 3
% 4.39/1.28 % AC symbols 0
% 4.39/1.28
% 4.39/1.28 % ------ Schedule dynamic 5 is on
% 4.39/1.28
% 4.39/1.28 % ------ Input Options "--resolution_flag false --inst_lit_sel_side none" Time Limit: 10.
% 4.39/1.28
% 4.39/1.28
% 4.39/1.28 % ------
% 4.39/1.28 % Current options:
% 4.39/1.28 % ------
% 4.39/1.28
% 4.39/1.28
% 4.39/1.28 %
% 4.39/1.28
% 4.39/1.28 % ------ Proving...
% 4.39/1.28 %
% 4.39/1.28
% 4.39/1.28 % SZS status Unsatisfiable for theBenchmark.p
% 4.39/1.28
% 4.39/1.28 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
% 4.39/1.28
% 4.39/1.28
%------------------------------------------------------------------------------