%------------------------------------------------------------------------------
% File : iProver---3.9.4
% Problem : SET208-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : run_iprover 300 /export/starexec/sandbox2/benchmark/theBenchmark.p THM
% Computer : n016.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 02:46:56 PM UTC 2026
% Result : Unsatisfiable 151.67s 21.97s
% Output : CNFRefutation 151.67s
% Verified :
% SZS Type : Refutation
% Derivation depth : 10
% Number of leaves : 11
% Syntax : Number of formulae : 38 ( 12 unt; 0 def)
% Number of atoms : 71 ( 8 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 63 ( 30 ~; 33 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 8 ( 4 avg)
% Maximal term depth : 7 ( 2 avg)
% Number of types : 1 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 10 ( 10 usr; 3 con; 0-2 aty)
% Number of variables : 74 ( 0 sgn 74 !; 0 ?; 32 :)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X2,X0,X1] :
( member(X2,X1)
| ~ member(X2,X0)
| ~ subclass(X0,X1) ),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',subclass_members) ).
fof(f2,axiom,
! [X0,X1] :
( subclass(X0,X1)
| member(not_subclass_element(X0,X1),X0) ),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',not_subclass_members1) ).
fof(f3,axiom,
! [X0,X1] :
( subclass(X0,X1)
| ~ member(not_subclass_element(X0,X1),X1) ),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',not_subclass_members2) ).
fof(f12,axiom,
! [X0] : unordered_pair(X0,X0) = singleton(X0),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',singleton_set) ).
fof(f13,axiom,
! [X0,X1] : unordered_pair(singleton(X0),unordered_pair(X0,singleton(X1))) = ordered_pair(X0,X1),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',ordered_pair) ).
fof(f14,axiom,
! [X2,X3,X0,X1] :
( member(X0,X2)
| ~ member(ordered_pair(X0,X1),cross_product(X2,X3)) ),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',cartesian_product1) ).
fof(f15,axiom,
! [X2,X3,X0,X1] :
( member(X1,X3)
| ~ member(ordered_pair(X0,X1),cross_product(X2,X3)) ),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',cartesian_product2) ).
fof(f16,axiom,
! [X2,X3,X0,X1] :
( member(ordered_pair(X0,X2),cross_product(X1,X3))
| ~ member(X2,X3)
| ~ member(X0,X1) ),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',cartesian_product3) ).
fof(f17,axiom,
! [X2,X0,X1] :
( ordered_pair(first(X0),second(X0)) = X0
| ~ member(X0,cross_product(X1,X2)) ),
file('/export/starexec/sandbox2/benchmark/Axioms/SET004-0.ax',cartesian_product4) ).
fof(f122,negated_conjecture,
subclass(x,y),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_cross_product_is_monotonic1_1) ).
fof(f123,negated_conjecture,
~ subclass(cross_product(x,z),cross_product(y,z)),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_cross_product_is_monotonic1_2) ).
fof(f128,plain,
! [X0,X1] : ordered_pair(X0,X1) = unordered_pair(unordered_pair(X0,X0),unordered_pair(X0,unordered_pair(X1,X1))),
inference(definition_unfolding,[],[f13,f12,f12]) ).
fof(f137,plain,
! [X2,X3,X0,X1] :
( member(X0,X2)
| ~ member(unordered_pair(unordered_pair(X0,X0),unordered_pair(X0,unordered_pair(X1,X1))),cross_product(X2,X3)) ),
inference(definition_unfolding,[],[f14,f128]) ).
fof(f138,plain,
! [X2,X3,X0,X1] :
( member(X1,X3)
| ~ member(unordered_pair(unordered_pair(X0,X0),unordered_pair(X0,unordered_pair(X1,X1))),cross_product(X2,X3)) ),
inference(definition_unfolding,[],[f15,f128]) ).
fof(f139,plain,
! [X2,X3,X0,X1] :
( member(unordered_pair(unordered_pair(X0,X0),unordered_pair(X0,unordered_pair(X2,X2))),cross_product(X1,X3))
| ~ member(X2,X3)
| ~ member(X0,X1) ),
inference(definition_unfolding,[],[f16,f128]) ).
fof(f140,plain,
! [X2,X0,X1] :
( unordered_pair(unordered_pair(first(X0),first(X0)),unordered_pair(first(X0),unordered_pair(second(X0),second(X0)))) = X0
| ~ member(X0,cross_product(X1,X2)) ),
inference(definition_unfolding,[],[f17,f128]) ).
tcf(c_163,plain,
! [X0: $i,X1: $i,X2: $i] :
( member(X2,X1)
| ~ member(X2,X0)
| ~ subclass(X0,X1) ),
inference(cnf_transformation,[],[f1]) ).
tcf(c_164,plain,
! [X0: $i,X1: $i] :
( subclass(X0,X1)
| member(not_subclass_element(X0,X1),X0) ),
inference(cnf_transformation,[],[f2]) ).
tcf(c_165,plain,
! [X0: $i,X1: $i] :
( subclass(X0,X1)
| ~ member(not_subclass_element(X0,X1),X1) ),
inference(cnf_transformation,[],[f3]) ).
tcf(c_174,plain,
! [X0: $i,X1: $i,X2: $i,X3: $i] :
( member(X0,X2)
| ~ member(unordered_pair(unordered_pair(X0,X0),unordered_pair(X0,unordered_pair(X1,X1))),cross_product(X2,X3)) ),
inference(cnf_transformation,[],[f137]) ).
tcf(c_175,plain,
! [X0: $i,X1: $i,X2: $i,X3: $i] :
( member(X1,X3)
| ~ member(unordered_pair(unordered_pair(X0,X0),unordered_pair(X0,unordered_pair(X1,X1))),cross_product(X2,X3)) ),
inference(cnf_transformation,[],[f138]) ).
tcf(c_176,plain,
! [X0: $i,X1: $i,X2: $i,X3: $i] :
( member(unordered_pair(unordered_pair(X0,X0),unordered_pair(X0,unordered_pair(X2,X2))),cross_product(X1,X3))
| ~ member(X2,X3)
| ~ member(X0,X1) ),
inference(cnf_transformation,[],[f139]) ).
tcf(c_177,plain,
! [X0: $i,X1: $i,X2: $i] :
( ( unordered_pair(unordered_pair(first(X0),first(X0)),unordered_pair(first(X0),unordered_pair(second(X0),second(X0)))) = X0 )
| ~ member(X0,cross_product(X1,X2)) ),
inference(cnf_transformation,[],[f140]) ).
tcf(c_256,negated_conjecture,
subclass(x,y),
inference(cnf_transformation,[],[f122]) ).
tcf(c_257,negated_conjecture,
~ subclass(cross_product(x,z),cross_product(y,z)),
inference(cnf_transformation,[],[f123]) ).
tcf(c_15544,plain,
! [X0: $i] :
( member(X0,y)
| ~ member(X0,x) ),
inference(superposition,[status(thm)],[c_256,c_163]) ).
tcf(c_15784,plain,
! [X0: $i,X1: $i,X2: $i] :
( subclass(cross_product(X0,X1),X2)
| ( unordered_pair(unordered_pair(first(not_subclass_element(cross_product(X0,X1),X2)),first(not_subclass_element(cross_product(X0,X1),X2))),unordered_pair(first(not_subclass_element(cross_product(X0,X1),X2)),unordered_pair(second(not_subclass_element(cross_product(X0,X1),X2)),second(not_subclass_element(cross_product(X0,X1),X2))))) = not_subclass_element(cross_product(X0,X1),X2) ) ),
inference(superposition,[status(thm)],[c_164,c_177]) ).
tcf(c_17230,plain,
unordered_pair(unordered_pair(first(not_subclass_element(cross_product(x,z),cross_product(y,z))),first(not_subclass_element(cross_product(x,z),cross_product(y,z)))),unordered_pair(first(not_subclass_element(cross_product(x,z),cross_product(y,z))),unordered_pair(second(not_subclass_element(cross_product(x,z),cross_product(y,z))),second(not_subclass_element(cross_product(x,z),cross_product(y,z)))))) = not_subclass_element(cross_product(x,z),cross_product(y,z)),
inference(superposition,[status(thm)],[c_15784,c_257]) ).
tcf(c_17274,plain,
! [X0: $i,X1: $i] :
( member(second(not_subclass_element(cross_product(x,z),cross_product(y,z))),X1)
| ~ member(not_subclass_element(cross_product(x,z),cross_product(y,z)),cross_product(X0,X1)) ),
inference(superposition,[status(thm)],[c_17230,c_175]) ).
tcf(c_17275,plain,
! [X0: $i,X1: $i] :
( member(first(not_subclass_element(cross_product(x,z),cross_product(y,z))),X0)
| ~ member(not_subclass_element(cross_product(x,z),cross_product(y,z)),cross_product(X0,X1)) ),
inference(superposition,[status(thm)],[c_17230,c_174]) ).
tcf(c_17287,plain,
! [X0: $i,X1: $i] :
( member(not_subclass_element(cross_product(x,z),cross_product(y,z)),cross_product(X0,X1))
| ~ member(second(not_subclass_element(cross_product(x,z),cross_product(y,z))),X1)
| ~ member(first(not_subclass_element(cross_product(x,z),cross_product(y,z))),X0) ),
inference(superposition,[status(thm)],[c_17230,c_176]) ).
tcf(c_17307,plain,
( subclass(cross_product(x,z),cross_product(y,z))
| member(second(not_subclass_element(cross_product(x,z),cross_product(y,z))),z) ),
inference(superposition,[status(thm)],[c_164,c_17274]) ).
tcf(c_17315,plain,
member(second(not_subclass_element(cross_product(x,z),cross_product(y,z))),z),
inference(forward_subsumption_resolution,[status(thm)],[c_17307,c_257]) ).
tcf(c_17328,plain,
( subclass(cross_product(x,z),cross_product(y,z))
| member(first(not_subclass_element(cross_product(x,z),cross_product(y,z))),x) ),
inference(superposition,[status(thm)],[c_164,c_17275]) ).
tcf(c_17336,plain,
member(first(not_subclass_element(cross_product(x,z),cross_product(y,z))),x),
inference(forward_subsumption_resolution,[status(thm)],[c_17328,c_257]) ).
tcf(c_17344,plain,
member(first(not_subclass_element(cross_product(x,z),cross_product(y,z))),y),
inference(superposition,[status(thm)],[c_17336,c_15544]) ).
tcf(c_17743,plain,
( subclass(cross_product(x,z),cross_product(y,z))
| ~ member(second(not_subclass_element(cross_product(x,z),cross_product(y,z))),z)
| ~ member(first(not_subclass_element(cross_product(x,z),cross_product(y,z))),y) ),
inference(superposition,[status(thm)],[c_17287,c_165]) ).
tcf(c_17751,plain,
$false,
inference(forward_subsumption_resolution,[status(thm)],[c_17743,c_257,c_17315,c_17344]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : SET208-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.04 % Command : run_iprover 300 /export/starexec/sandbox2/benchmark/theBenchmark.p THM
% 0.09/0.38 % Computer : n016.cluster.edu
% 0.09/0.38 % Model : x86_64 x86_64
% 0.09/0.38 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.38 % Memory : 8046.5625MB
% 0.09/0.38 % OS : Linux 6.8.0-71-generic
% 0.09/0.38 % CPULimit : 300
% 0.09/0.38 % WCLimit : 300
% 0.09/0.38 % DateTime : Thu Sep 24 10:20:27 UTC 2026
% 0.09/0.38 % CPUTime :
% 0.09/0.38 Running run_iprover 300 /export/starexec/sandbox2/benchmark/theBenchmark.p THM
% 0.09/0.42 Running first-order theorem proving
% 0.09/0.42 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
% 0.09/0.43
% 0.09/0.43 % ======== iProver multi-core TPTP/SMT =========
% 0.09/0.43
% 0.09/0.43 % Detected problem language: tptp
% 0.09/0.45 % Proving...
% 151.67/21.97 % SZS status Started for theBenchmark.p
% 151.67/21.97 % SZS status Unsatisfiable for theBenchmark.p
% 151.67/21.97
% 151.67/21.97 %---------------- iProver v3.9.4 (pre CASC 2026/SMT-COMP 2026) ----------------%
% 151.67/21.97
% 151.67/21.97 % ------ iProver source info
% 151.67/21.97
% 151.67/21.97 % git: date: 2026-07-19 20:42:38 +0200
% 151.67/21.97 % git: sha1: 804e7d636a263075307957e923b7a22a4035de61
% 151.67/21.97 % git: non_committed_changes: false
% 151.67/21.97
% 151.67/21.97 % ------ Parsing...% successful
% 151.67/21.97
% 151.67/21.97
% 151.67/21.97 % ------ Clausification by vclausify_rel & Parsing by iProver...%
% 151.67/21.97
% 151.67/21.97 % ------ Preprocessing... sup_sim: 0 sf_s rm: 1 0s sf_e pe_s pe:1:0s pe:2:0s pe:4:0s pe_e sup_sim: 0 sf_s rm: 3 0s sf_e pe_s pe_e %
% 151.67/21.97
% 151.67/21.97 % ------ Preprocessing... gs_s sp: 0 0s gs_e snvd_s sp: 0 0s snvd_e %
% 151.67/21.97
% 151.67/21.97 % ------ Preprocessing... sf_s rm: 1 0s sf_e sf_s rm: 0 0s sf_e
% 151.67/21.97 % ------ Proving...
% 151.67/21.97 % ------ Problem Properties
% 151.67/21.97
% 151.67/21.97 %
% 151.67/21.97 % clauses 83
% 151.67/21.97 % conjectures 2
% 151.67/21.97 % EPR 13
% 151.67/21.97 % Horn 75
% 151.67/21.97 % unary 22
% 151.67/21.97 % binary 40
% 151.67/21.97 % lits 171
% 151.67/21.97 % lits eq 25
% 151.67/21.97 % fd_pure 0
% 151.67/21.97 % fd_pseudo 0
% 151.67/21.97 % fd_cond 3
% 151.67/21.97 % fd_pseudo_cond 7
% 151.67/21.97 % AC symbols 0
% 151.67/21.97
% 151.67/21.97 % ------ Input Options Time Limit: Unbounded
% 151.67/21.97
% 151.67/21.97
% 151.67/21.97 % ------
% 151.67/21.97 % Current options:
% 151.67/21.97 % ------
% 151.67/21.97
% 151.67/21.97
% 151.67/21.97 %
% 151.67/21.97
% 151.67/21.97 % ------ Proving...
% 151.67/21.97 %
% 151.67/21.97
% 151.67/21.97 % SZS status Unsatisfiable for theBenchmark.p
% 151.67/21.97
% 151.67/21.97 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
% 151.67/21.97
% 151.67/21.97
%------------------------------------------------------------------------------