%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : SET090+1 : TPTP v9.3.1. Bugfixed v7.3.0.
% Transfm : none
% Format : tptp:raw
% Command : java -Xss128m -Xmx2g -Xms1g -jar /export/starexec/sandbox/solver/bin/leo3.jar /export/starexec/sandbox/benchmark/theBenchmark.p -t 300 -p --atp eprover=/export/starexec/sandbox/solver/bin/externals/eprover --instantiate 39
% Computer : n011.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 : Sun Sep 27 08:29:21 AM UTC 2026
% Result : Theorem 6.68s 3.11s
% Output : Refutation 7.35s
% Verified :
% SZS Type : Refutation
% Derivation depth : 3
% Number of leaves : 48
% Syntax : Number of formulae : 98 ( 33 unt; 0 typ; 0 def)
% Number of atoms : 285 ( 58 equ; 0 cnn)
% Maximal formula atoms : 8 ( 2 avg)
% Number of connectives : 1053 ( 15 ~; 12 |; 92 &; 851 @)
% ( 19 <=>; 64 =>; 0 <=; 0 <~>)
% Maximal formula depth : 14 ( 7 avg)
% Number of types : 2 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 34 ( 32 usr; 6 con; 0-3 aty)
% Number of variables : 190 ( 0 ^; 178 !; 12 ?; 190 :)
% Comments :
%------------------------------------------------------------------------------
thf(member_decl,type,
member: $i > $i > $o ).
thf(universal_class_decl,type,
universal_class: $i ).
thf(singleton_decl,type,
singleton: $i > $i ).
thf(member_of_decl,type,
member_of: $i > $i ).
thf(subclass_decl,type,
subclass: $i > $i > $o ).
thf(restrict_decl,type,
restrict: $i > $i > $i > $i ).
thf(intersection_decl,type,
intersection: $i > $i > $i ).
thf(cross_product_decl,type,
cross_product: $i > $i > $i ).
thf(range_of_decl,type,
range_of: $i > $i ).
thf(domain_of_decl,type,
domain_of: $i > $i ).
thf(inverse_decl,type,
inverse: $i > $i ).
thf(apply_decl,type,
apply: $i > $i > $i ).
thf(sum_class_decl,type,
sum_class: $i > $i ).
thf(image_decl,type,
image: $i > $i > $i ).
thf(null_class_decl,type,
null_class: $i ).
thf(flip_decl,type,
flip: $i > $i ).
thf(function_decl,type,
function: $i > $o ).
thf(compose_decl,type,
compose: $i > $i > $i ).
thf(identity_relation_decl,type,
identity_relation: $i ).
thf(inductive_decl,type,
inductive: $i > $o ).
thf(successor_relation_decl,type,
successor_relation: $i ).
thf(power_class_decl,type,
power_class: $i > $i ).
thf(unordered_pair_decl,type,
unordered_pair: $i > $i > $i ).
thf(ordered_pair_decl,type,
ordered_pair: $i > $i > $i ).
thf(disjoint_decl,type,
disjoint: $i > $i > $o ).
thf(first_decl,type,
first: $i > $i ).
thf(second_decl,type,
second: $i > $i ).
thf(rotate_decl,type,
rotate: $i > $i ).
thf(successor_decl,type,
successor: $i > $i ).
thf(element_relation_decl,type,
element_relation: $i ).
thf(union_decl,type,
union: $i > $i > $i ).
thf(complement_decl,type,
complement: $i > $i ).
thf(23,axiom,
! [A: $i,B: $i,C: $i,D: $i] :
( ( D @ ( C @ cross_product ) @ ( B @ ( A @ ordered_pair ) @ member ) )
<=> ( ( D @ ( B @ member ) )
& ( C @ ( A @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',cross_product_defn) ).
thf(170,plain,
! [A: $i,B: $i,C: $i,D: $i] :
( ( ( ( D @ ( B @ member ) )
& ( C @ ( A @ member ) ) )
=> ( D @ ( C @ cross_product ) @ ( B @ ( A @ ordered_pair ) @ member ) ) )
& ( ( D @ ( C @ cross_product ) @ ( B @ ( A @ ordered_pair ) @ member ) )
=> ( ( D @ ( B @ member ) )
& ( C @ ( A @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[23]) ).
thf(40,axiom,
! [A: $i,B: $i] : ( universal_class @ ( universal_class @ cross_product ) @ ( A @ ( B @ compose ) @ subclass ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',compose_defn1) ).
thf(257,plain,
! [A: $i,B: $i] : ( universal_class @ ( universal_class @ cross_product ) @ ( A @ ( B @ compose ) @ subclass ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[40]) ).
thf(25,axiom,
! [A: $i,B: $i] :
( ( ( universal_class @ ( B @ member ) )
& ( universal_class @ ( A @ member ) ) )
=> ( ( ( B @ ( A @ ordered_pair ) @ second )
= B )
& ( ( B @ ( A @ ordered_pair ) @ first )
= A ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',first_second) ).
thf(184,plain,
! [A: $i,B: $i] :
( ( ( universal_class @ ( B @ member ) )
& ( universal_class @ ( A @ member ) ) )
=> ( ( ( B @ ( A @ ordered_pair ) @ second )
= B )
& ( ( B @ ( A @ ordered_pair ) @ first )
= A ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[25]) ).
thf(14,axiom,
! [A: $i] :
( ( ( A @ member_of )
= A )
| ( universal_class @ ( A @ member_of @ member ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',member_universal_self) ).
thf(121,plain,
! [A: $i] :
( ( ( A @ member_of )
= A )
| ( universal_class @ ( A @ member_of @ member ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[14]) ).
thf(47,axiom,
! [A: $i] : ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( A @ flip @ subclass ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',flip) ).
thf(280,plain,
! [A: $i] : ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( A @ flip @ subclass ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[47]) ).
thf(27,axiom,
! [A: $i] :
( ( ( A @ member_of )
= A )
| ( ( A @ member_of @ singleton )
= A ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',singleton_self) ).
thf(192,plain,
! [A: $i] :
( ( ( A @ member_of )
= A )
| ( ( A @ member_of @ singleton )
= A ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[27]) ).
thf(21,axiom,
! [A: $i] :
( ( universal_class @ ( A @ member ) )
=> ( ( A @ singleton @ member_of @ singleton )
= ( A @ singleton ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',member_singleton_singleton) ).
thf(159,plain,
! [A: $i] :
( ( universal_class @ ( A @ member ) )
=> ( ( A @ singleton @ member_of @ singleton )
= ( A @ singleton ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[21]) ).
thf(22,axiom,
! [A: $i,B: $i] :
( ( B @ ( A @ disjoint ) )
<=> ! [C: $i] :
~ ( ( B @ ( C @ member ) )
& ( A @ ( C @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',disjoint_defn) ).
thf(162,plain,
! [A: $i,B: $i] :
( ( ! [C: $i] :
~ ( ( B @ ( C @ member ) )
& ( A @ ( C @ member ) ) )
=> ( B @ ( A @ disjoint ) ) )
& ( ( B @ ( A @ disjoint ) )
=> ! [C: $i] :
~ ( ( B @ ( C @ member ) )
& ( A @ ( C @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[22]) ).
thf(48,axiom,
! [A: $i] :
( ( identity_relation @ ( A @ member ) )
<=> ? [B: $i] :
( ( A
= ( B @ ( B @ ordered_pair ) ) )
& ( universal_class @ ( B @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',identity_relation) ).
thf(282,plain,
! [A: $i] :
( ( ? [B: $i] :
( ( A
= ( B @ ( B @ ordered_pair ) ) )
& ( universal_class @ ( B @ member ) ) )
=> ( identity_relation @ ( A @ member ) ) )
& ( ( identity_relation @ ( A @ member ) )
=> ? [B: $i] :
( ( A
= ( B @ ( B @ ordered_pair ) ) )
& ( universal_class @ ( B @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[48]) ).
thf(5,axiom,
! [A: $i] :
( ( A @ range_of )
= ( A @ inverse @ domain_of ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',range_of_defn) ).
thf(72,plain,
! [A: $i] :
( ( A @ range_of )
= ( A @ inverse @ domain_of ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[5]) ).
thf(13,axiom,
! [A: $i] :
( ( A @ inductive )
<=> ( ( A @ ( A @ ( successor_relation @ image ) @ subclass ) )
& ( A @ ( null_class @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',inductive_defn) ).
thf(114,plain,
! [A: $i] :
( ( ( ( A @ ( A @ ( successor_relation @ image ) @ subclass ) )
& ( A @ ( null_class @ member ) ) )
=> ( A @ inductive ) )
& ( ( A @ inductive )
=> ( ( A @ ( A @ ( successor_relation @ image ) @ subclass ) )
& ( A @ ( null_class @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[13]) ).
thf(26,axiom,
! [A: $i] : ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( A @ rotate @ subclass ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',rotate) ).
thf(190,plain,
! [A: $i] : ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( A @ rotate @ subclass ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[26]) ).
thf(16,axiom,
! [A: $i] :
( ( A @ singleton )
= ( A @ ( A @ unordered_pair ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',singleton_set_defn) ).
thf(131,plain,
! [A: $i] :
( ( A @ singleton )
= ( A @ ( A @ unordered_pair ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[16]) ).
thf(33,axiom,
! [A: $i,B: $i] :
( ( B @ ( A @ ordered_pair ) )
= ( B @ singleton @ ( A @ unordered_pair ) @ ( A @ singleton @ unordered_pair ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',ordered_pair_defn) ).
thf(222,plain,
! [A: $i,B: $i] :
( ( B @ ( A @ ordered_pair ) )
= ( B @ singleton @ ( A @ unordered_pair ) @ ( A @ singleton @ unordered_pair ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[33]) ).
thf(4,axiom,
! [A: $i,B: $i,C: $i] :
( ( C @ ( A @ ( B @ restrict ) ) )
= ( C @ ( A @ cross_product ) @ ( B @ intersection ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',restrict_defn) ).
thf(69,plain,
! [A: $i,B: $i,C: $i] :
( ( C @ ( A @ ( B @ restrict ) ) )
= ( C @ ( A @ cross_product ) @ ( B @ intersection ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[4]) ).
thf(39,axiom,
! [A: $i,B: $i,C: $i] :
( ( B @ ( A @ union ) @ ( C @ member ) )
<=> ( ( B @ ( C @ member ) )
| ( A @ ( C @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',union_defn) ).
thf(249,plain,
! [A: $i,B: $i,C: $i] :
( ( ( ( B @ ( C @ member ) )
| ( A @ ( C @ member ) ) )
=> ( B @ ( A @ union ) @ ( C @ member ) ) )
& ( ( B @ ( A @ union ) @ ( C @ member ) )
=> ( ( B @ ( C @ member ) )
| ( A @ ( C @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[39]) ).
thf(3,axiom,
! [A: $i,B: $i] :
( ( A = B )
<=> ( ( A @ ( B @ subclass ) )
& ( B @ ( A @ subclass ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',extensionality) ).
thf(57,plain,
! [A: $i,B: $i] :
( ( ( ( A @ ( B @ subclass ) )
& ( B @ ( A @ subclass ) ) )
=> ( A = B ) )
& ( ( A = B )
=> ( ( A @ ( B @ subclass ) )
& ( B @ ( A @ subclass ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[3]) ).
thf(42,axiom,
! [A: $i] :
( ( A @ successor )
= ( A @ singleton @ ( A @ union ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',successor_defn) ).
thf(261,plain,
! [A: $i] :
( ( A @ successor )
= ( A @ singleton @ ( A @ union ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[42]) ).
thf(36,axiom,
! [A: $i,B: $i] :
( ( ( B @ function )
& ( universal_class @ ( A @ member ) ) )
=> ( universal_class @ ( A @ ( B @ image ) @ member ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',replacement) ).
thf(233,plain,
! [A: $i,B: $i] :
( ( ( B @ function )
& ( universal_class @ ( A @ member ) ) )
=> ( universal_class @ ( A @ ( B @ image ) @ member ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[36]) ).
thf(32,axiom,
! [A: $i] :
( ( universal_class @ ( A @ member ) )
=> ( universal_class @ ( A @ singleton @ member_of @ member ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',member_singleton_universal) ).
thf(220,plain,
! [A: $i] :
( ( universal_class @ ( A @ member ) )
=> ( universal_class @ ( A @ singleton @ member_of @ member ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[32]) ).
thf(20,axiom,
! [A: $i,B: $i,C: $i] :
( ( B @ ( A @ cross_product ) @ ( C @ member ) )
=> ( C
= ( C @ second @ ( C @ first @ ordered_pair ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',cross_product) ).
thf(156,plain,
! [A: $i,B: $i,C: $i] :
( ( B @ ( A @ cross_product ) @ ( C @ member ) )
=> ( C
= ( C @ second @ ( C @ first @ ordered_pair ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[20]) ).
thf(18,axiom,
! [A: $i,B: $i,C: $i] :
( ( B @ ( A @ intersection ) @ ( C @ member ) )
<=> ( ( B @ ( C @ member ) )
& ( A @ ( C @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',intersection) ).
thf(141,plain,
! [A: $i,B: $i,C: $i] :
( ( ( ( B @ ( C @ member ) )
& ( A @ ( C @ member ) ) )
=> ( B @ ( A @ intersection ) @ ( C @ member ) ) )
& ( ( B @ ( A @ intersection ) @ ( C @ member ) )
=> ( ( B @ ( C @ member ) )
& ( A @ ( C @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[18]) ).
thf(7,axiom,
! [A: $i,B: $i] :
( ( B @ ( A @ apply ) )
= ( B @ singleton @ ( A @ image ) @ sum_class ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',apply_defn) ).
thf(77,plain,
! [A: $i,B: $i] :
( ( B @ ( A @ apply ) )
= ( B @ singleton @ ( A @ image ) @ sum_class ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[7]) ).
thf(10,axiom,
! [A: $i,B: $i] :
( ( B @ ( A @ subclass ) )
<=> ! [C: $i] :
( ( A @ ( C @ member ) )
=> ( B @ ( C @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',subclass_defn) ).
thf(96,plain,
! [A: $i,B: $i] :
( ( ! [C: $i] :
( ( A @ ( C @ member ) )
=> ( B @ ( C @ member ) ) )
=> ( B @ ( A @ subclass ) ) )
& ( ( B @ ( A @ subclass ) )
=> ! [C: $i] :
( ( A @ ( C @ member ) )
=> ( B @ ( C @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[10]) ).
thf(15,axiom,
! [A: $i,B: $i] :
( ( B @ power_class @ ( A @ member ) )
<=> ( ( B @ ( A @ subclass ) )
& ( universal_class @ ( A @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',power_class_defn) ).
thf(124,plain,
! [A: $i,B: $i] :
( ( ( ( B @ ( A @ subclass ) )
& ( universal_class @ ( A @ member ) ) )
=> ( B @ power_class @ ( A @ member ) ) )
& ( ( B @ power_class @ ( A @ member ) )
=> ( ( B @ ( A @ subclass ) )
& ( universal_class @ ( A @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[15]) ).
thf(34,axiom,
? [A: $i] :
( ! [B: $i] :
( ( B @ inductive )
=> ( B @ ( A @ subclass ) ) )
& ( A @ inductive )
& ( universal_class @ ( A @ member ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',infinity) ).
thf(225,plain,
? [A: $i] :
( ! [B: $i] :
( ( B @ inductive )
=> ( B @ ( A @ subclass ) ) )
& ( A @ inductive )
& ( universal_class @ ( A @ member ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[34]) ).
thf(17,axiom,
! [A: $i,B: $i,C: $i,D: $i] :
( ( A @ ( B @ compose ) @ ( D @ ( C @ ordered_pair ) @ member ) )
<=> ( ( C @ singleton @ ( A @ image ) @ ( B @ image ) @ ( D @ member ) )
& ( universal_class @ ( C @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',compose_defn2) ).
thf(134,plain,
! [A: $i,B: $i,C: $i,D: $i] :
( ( ( ( C @ singleton @ ( A @ image ) @ ( B @ image ) @ ( D @ member ) )
& ( universal_class @ ( C @ member ) ) )
=> ( A @ ( B @ compose ) @ ( D @ ( C @ ordered_pair ) @ member ) ) )
& ( ( A @ ( B @ compose ) @ ( D @ ( C @ ordered_pair ) @ member ) )
=> ( ( C @ singleton @ ( A @ image ) @ ( B @ image ) @ ( D @ member ) )
& ( universal_class @ ( C @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[17]) ).
thf(29,axiom,
! [A: $i,B: $i] : ( universal_class @ ( B @ ( A @ unordered_pair ) @ member ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',unordered_pair) ).
thf(205,plain,
! [A: $i,B: $i] : ( universal_class @ ( B @ ( A @ unordered_pair ) @ member ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[29]) ).
thf(19,axiom,
! [A: $i] :
( ( A != null_class )
=> ? [B: $i] :
( ( A @ ( B @ disjoint ) )
& ( A @ ( B @ member ) )
& ( universal_class @ ( B @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',regularity) ).
thf(148,plain,
! [A: $i] :
( ( A != null_class )
=> ? [B: $i] :
( ( A @ ( B @ disjoint ) )
& ( A @ ( B @ member ) )
& ( universal_class @ ( B @ member ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[19]) ).
thf(43,axiom,
! [A: $i,B: $i] :
( ( A @ ( B @ image ) )
= ( universal_class @ ( A @ ( B @ restrict ) ) @ range_of ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',image_defn) ).
thf(264,plain,
! [A: $i,B: $i] :
( ( A @ ( B @ image ) )
= ( universal_class @ ( A @ ( B @ restrict ) ) @ range_of ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[43]) ).
thf(46,axiom,
universal_class @ ( universal_class @ cross_product ) @ ( element_relation @ subclass ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',element_relation) ).
thf(279,plain,
universal_class @ ( universal_class @ cross_product ) @ ( element_relation @ subclass ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[46]) ).
thf(49,axiom,
! [A: $i] :
( ( universal_class @ ( A @ member ) )
=> ( universal_class @ ( A @ sum_class @ member ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',sum_class) ).
thf(291,plain,
! [A: $i] :
( ( universal_class @ ( A @ member ) )
=> ( universal_class @ ( A @ sum_class @ member ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[49]) ).
thf(41,axiom,
! [A: $i] :
( ( universal_class @ ( A @ member ) )
=> ( universal_class @ ( A @ power_class @ member ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',power_class) ).
thf(259,plain,
! [A: $i] :
( ( universal_class @ ( A @ member ) )
=> ( universal_class @ ( A @ power_class @ member ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[41]) ).
thf(31,axiom,
universal_class @ ( universal_class @ cross_product ) @ ( successor_relation @ subclass ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',successor_relation_defn1) ).
thf(219,plain,
universal_class @ ( universal_class @ cross_product ) @ ( successor_relation @ subclass ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[31]) ).
thf(45,axiom,
? [A: $i] :
( ! [B: $i] :
( ( universal_class @ ( B @ member ) )
=> ( ( B @ ( B @ ( A @ apply ) @ member ) )
| ( B = null_class ) ) )
& ( A @ function ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',choice) ).
thf(274,plain,
? [A: $i] :
( ! [B: $i] :
( ( universal_class @ ( B @ member ) )
=> ( ( B @ ( B @ ( A @ apply ) @ member ) )
| ( B = null_class ) ) )
& ( A @ function ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[45]) ).
thf(35,axiom,
! [A: $i] :
~ ( null_class @ ( A @ member ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',null_class_defn) ).
thf(230,plain,
! [A: $i] :
~ ( null_class @ ( A @ member ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[35]) ).
thf(44,axiom,
! [A: $i,B: $i] :
( ( A @ complement @ ( B @ member ) )
<=> ( ~ ( A @ ( B @ member ) )
& ( universal_class @ ( B @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',complement) ).
thf(267,plain,
! [A: $i,B: $i] :
( ( ( ~ ( A @ ( B @ member ) )
& ( universal_class @ ( B @ member ) ) )
=> ( A @ complement @ ( B @ member ) ) )
& ( ( A @ complement @ ( B @ member ) )
=> ( ~ ( A @ ( B @ member ) )
& ( universal_class @ ( B @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[44]) ).
thf(8,axiom,
! [A: $i,B: $i] :
( ( B @ sum_class @ ( A @ member ) )
<=> ? [C: $i] :
( ( B @ ( C @ member ) )
& ( C @ ( A @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',sum_class_defn) ).
thf(80,plain,
! [A: $i,B: $i] :
( ( ? [C: $i] :
( ( B @ ( C @ member ) )
& ( C @ ( A @ member ) ) )
=> ( B @ sum_class @ ( A @ member ) ) )
& ( ( B @ sum_class @ ( A @ member ) )
=> ? [C: $i] :
( ( B @ ( C @ member ) )
& ( C @ ( A @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[8]) ).
thf(1,conjecture,
! [A: $i,B: $i] :
( ( ( A
= ( B @ singleton ) )
& ( universal_class @ ( B @ member ) ) )
=> ( ( A @ member_of )
= B ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',member_of_singleton) ).
thf(2,negated_conjecture,
~ ! [A: $i,B: $i] :
( ( ( A
= ( B @ singleton ) )
& ( universal_class @ ( B @ member ) ) )
=> ( ( A @ member_of )
= B ) ),
inference(neg_conjecture,[status(cth)],[1]) ).
thf(50,plain,
~ ! [A: $i,B: $i] :
( ( ( A
= ( B @ singleton ) )
& ( universal_class @ ( B @ member ) ) )
=> ( ( A @ member_of )
= B ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(24,axiom,
! [A: $i,B: $i,C: $i,D: $i] :
( ( A @ rotate @ ( D @ ( C @ ( B @ ordered_pair ) @ ordered_pair ) @ member ) )
<=> ( ( A @ ( B @ ( D @ ( C @ ordered_pair ) @ ordered_pair ) @ member ) )
& ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( D @ ( C @ ( B @ ordered_pair ) @ ordered_pair ) @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',rotate_defn) ).
thf(177,plain,
! [A: $i,B: $i,C: $i,D: $i] :
( ( ( ( A @ ( B @ ( D @ ( C @ ordered_pair ) @ ordered_pair ) @ member ) )
& ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( D @ ( C @ ( B @ ordered_pair ) @ ordered_pair ) @ member ) ) )
=> ( A @ rotate @ ( D @ ( C @ ( B @ ordered_pair ) @ ordered_pair ) @ member ) ) )
& ( ( A @ rotate @ ( D @ ( C @ ( B @ ordered_pair ) @ ordered_pair ) @ member ) )
=> ( ( A @ ( B @ ( D @ ( C @ ordered_pair ) @ ordered_pair ) @ member ) )
& ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( D @ ( C @ ( B @ ordered_pair ) @ ordered_pair ) @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[24]) ).
thf(9,axiom,
! [A: $i,B: $i] :
( ( A @ domain_of @ ( B @ member ) )
<=> ( ( ( universal_class @ ( B @ singleton @ ( A @ restrict ) ) )
!= null_class )
& ( universal_class @ ( B @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',domain_of) ).
thf(87,plain,
! [A: $i,B: $i] :
( ( ( ( ( universal_class @ ( B @ singleton @ ( A @ restrict ) ) )
!= null_class )
& ( universal_class @ ( B @ member ) ) )
=> ( A @ domain_of @ ( B @ member ) ) )
& ( ( A @ domain_of @ ( B @ member ) )
=> ( ( ( universal_class @ ( B @ singleton @ ( A @ restrict ) ) )
!= null_class )
& ( universal_class @ ( B @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[9]) ).
thf(11,axiom,
! [A: $i] :
( ( A @ inverse )
= ( universal_class @ ( A @ cross_product ) @ flip @ domain_of ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',inverse_defn) ).
thf(104,plain,
! [A: $i] :
( ( A @ inverse )
= ( universal_class @ ( A @ cross_product ) @ flip @ domain_of ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[11]) ).
thf(6,axiom,
! [A: $i] : ( universal_class @ ( A @ subclass ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',class_elements_are_sets) ).
thf(75,plain,
! [A: $i] : ( universal_class @ ( A @ subclass ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[6]) ).
thf(37,axiom,
! [A: $i,B: $i,C: $i,D: $i] :
( ( D @ flip @ ( C @ ( B @ ( A @ ordered_pair ) @ ordered_pair ) @ member ) )
<=> ( ( D @ ( C @ ( A @ ( B @ ordered_pair ) @ ordered_pair ) @ member ) )
& ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( C @ ( B @ ( A @ ordered_pair ) @ ordered_pair ) @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',flip_defn) ).
thf(235,plain,
! [A: $i,B: $i,C: $i,D: $i] :
( ( ( ( D @ ( C @ ( A @ ( B @ ordered_pair ) @ ordered_pair ) @ member ) )
& ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( C @ ( B @ ( A @ ordered_pair ) @ ordered_pair ) @ member ) ) )
=> ( D @ flip @ ( C @ ( B @ ( A @ ordered_pair ) @ ordered_pair ) @ member ) ) )
& ( ( D @ flip @ ( C @ ( B @ ( A @ ordered_pair ) @ ordered_pair ) @ member ) )
=> ( ( D @ ( C @ ( A @ ( B @ ordered_pair ) @ ordered_pair ) @ member ) )
& ( universal_class @ ( universal_class @ ( universal_class @ cross_product ) @ cross_product ) @ ( C @ ( B @ ( A @ ordered_pair ) @ ordered_pair ) @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[37]) ).
thf(30,axiom,
! [A: $i,B: $i,C: $i] :
( ( C @ ( B @ unordered_pair ) @ ( A @ member ) )
<=> ( ( ( A = C )
| ( A = B ) )
& ( universal_class @ ( A @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',unordered_pair_defn) ).
thf(207,plain,
! [A: $i,B: $i,C: $i] :
( ( ( ( ( A = C )
| ( A = B ) )
& ( universal_class @ ( A @ member ) ) )
=> ( C @ ( B @ unordered_pair ) @ ( A @ member ) ) )
& ( ( C @ ( B @ unordered_pair ) @ ( A @ member ) )
=> ( ( ( A = C )
| ( A = B ) )
& ( universal_class @ ( A @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[30]) ).
thf(12,axiom,
! [A: $i] :
( ( A @ function )
<=> ( ( identity_relation @ ( A @ inverse @ ( A @ compose ) @ subclass ) )
& ( universal_class @ ( universal_class @ cross_product ) @ ( A @ subclass ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',function_defn) ).
thf(107,plain,
! [A: $i] :
( ( ( ( identity_relation @ ( A @ inverse @ ( A @ compose ) @ subclass ) )
& ( universal_class @ ( universal_class @ cross_product ) @ ( A @ subclass ) ) )
=> ( A @ function ) )
& ( ( A @ function )
=> ( ( identity_relation @ ( A @ inverse @ ( A @ compose ) @ subclass ) )
& ( universal_class @ ( universal_class @ cross_product ) @ ( A @ subclass ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[12]) ).
thf(38,axiom,
! [A: $i,B: $i] :
( ( element_relation @ ( B @ ( A @ ordered_pair ) @ member ) )
<=> ( ( B @ ( A @ member ) )
& ( universal_class @ ( B @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',element_relation_defn) ).
thf(242,plain,
! [A: $i,B: $i] :
( ( ( ( B @ ( A @ member ) )
& ( universal_class @ ( B @ member ) ) )
=> ( element_relation @ ( B @ ( A @ ordered_pair ) @ member ) ) )
& ( ( element_relation @ ( B @ ( A @ ordered_pair ) @ member ) )
=> ( ( B @ ( A @ member ) )
& ( universal_class @ ( B @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[38]) ).
thf(28,axiom,
! [A: $i,B: $i] :
( ( successor_relation @ ( B @ ( A @ ordered_pair ) @ member ) )
<=> ( ( ( A @ successor )
= B )
& ( universal_class @ ( B @ member ) )
& ( universal_class @ ( A @ member ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',successor_relation_defn2) ).
thf(195,plain,
! [A: $i,B: $i] :
( ( ( ( ( A @ successor )
= B )
& ( universal_class @ ( B @ member ) )
& ( universal_class @ ( A @ member ) ) )
=> ( successor_relation @ ( B @ ( A @ ordered_pair ) @ member ) ) )
& ( ( successor_relation @ ( B @ ( A @ ordered_pair ) @ member ) )
=> ( ( ( A @ successor )
= B )
& ( universal_class @ ( B @ member ) )
& ( universal_class @ ( A @ member ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[28]) ).
thf(319,plain,
$false,
inference(e,[status(thm)],[170,257,184,121,280,192,159,162,282,72,114,190,131,222,69,249,57,261,233,220,156,141,77,96,124,225,134,205,148,264,279,291,259,219,274,230,267,80,50,177,87,104,75,235,207,107,242,195]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : SET090+1 : TPTP v9.3.1. Bugfixed v7.3.0.
% 0.00/0.08 % Command : java -Xss128m -Xmx2g -Xms1g -jar /export/starexec/sandbox/solver/bin/leo3.jar /export/starexec/sandbox/benchmark/theBenchmark.p -t 300 -p --atp eprover=/export/starexec/sandbox/solver/bin/externals/eprover --instantiate 39
% 0.13/0.40 % Computer : n011.cluster.edu
% 0.13/0.40 % Model : x86_64 x86_64
% 0.13/0.40 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.40 % Memory : 8046.5625MB
% 0.13/0.40 % OS : Linux 6.8.0-71-generic
% 0.13/0.40 % CPULimit : 300
% 0.13/0.40 % WCLimit : 300
% 0.13/0.40 % DateTime : Sat Sep 26 07:04:45 UTC 2026
% 0.13/0.40 % CPUTime :
% 0.13/0.40 Running java -Xss128m -Xmx2g -Xms1g -jar /export/starexec/sandbox/solver/bin/leo3.jar /export/starexec/sandbox/benchmark/theBenchmark.p -t 300 -p --atp eprover=/export/starexec/sandbox/solver/bin/externals/eprover --instantiate 39
% 0.86/0.99 % [INFO] Parsing problem /export/starexec/sandbox/benchmark/theBenchmark.p ...
% 1.43/1.22 % [INFO] Parsing done (229ms).
% 1.43/1.24 % [INFO] Running in sequential loop mode.
% 2.34/1.65 % [INFO] eprover registered as external prover.
% 2.34/1.66 % [INFO] Scanning for conjecture ...
% 2.54/1.77 % [INFO] Found a conjecture (or negated_conjecture) and 47 axioms. Running axiom selection ...
% 2.71/1.86 % [INFO] Axiom selection finished. Selected 47 axioms (removed 0 axioms).
% 2.93/1.94 % [INFO] Problem is first-order (TPTP FOF).
% 2.93/1.95 % [INFO] Type checking passed.
% 2.93/1.95 % [CONFIG] Using configuration: timeout(300) with strategy<name(default),share(1.0),primSubst(3),sos(false),unifierCount(4),uniDepth(8),boolExt(true),choice(true),renaming(true),funcspec(false), domConstr(0),specialInstances(39),restrictUniAttempts(true),termOrdering(CPO)>. Searching for refutation ...
% 6.68/3.10 % External prover 'e' found a proof!
% 6.68/3.10 % [INFO] Killing All external provers ...
% 6.68/3.11 % Time passed: 2557ms (effective reasoning time: 1860ms)
% 6.68/3.11 % Solved by strategy<name(default),share(1.0),primSubst(3),sos(false),unifierCount(4),uniDepth(8),boolExt(true),choice(true),renaming(true),funcspec(false), domConstr(0),specialInstances(39),restrictUniAttempts(true),termOrdering(CPO)>
% 6.68/3.11 % Axioms used in derivation (47): sum_class_defn, image_defn, cross_product_defn, infinity, first_second, null_class_defn, sum_class, restrict_defn, member_singleton_universal, compose_defn1, inductive_defn, unordered_pair, cross_product, flip_defn, function_defn, element_relation_defn, identity_relation, unordered_pair_defn, successor_relation_defn1, power_class_defn, intersection, inverse_defn, replacement, element_relation, singleton_set_defn, singleton_self, member_singleton_singleton, extensionality, member_universal_self, rotate, subclass_defn, domain_of, power_class, flip, compose_defn2, choice, complement, disjoint_defn, apply_defn, regularity, successor_defn, ordered_pair_defn, class_elements_are_sets, range_of_defn, union_defn, successor_relation_defn2, rotate_defn
% 6.68/3.11 % No. of inferences in proof: 98
% 6.68/3.11 % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : 2557 ms resp. 1860 ms w/o parsing
% 7.35/3.24 % SZS output start Refutation for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
% 7.35/3.25 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------