%------------------------------------------------------------------------------
% File : Z3---4.15.1
% Problem : SET067-7 : TPTP v9.0.0. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp
% Command : run_E %s %d THM
% Computer : n010.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8042.1875MB
% OS : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Sat Jun 21 05:25:04 AM UTC 2025
% Result : Unsatisfiable 0.19s 0.41s
% Output : Proof 0.19s
% Verified :
% SZS Type : Refutation
% Derivation depth : 15
% Number of leaves : 39
% Syntax : Number of formulae : 105 ( 33 unt; 0 typ; 0 def)
% Number of atoms : 372 ( 77 equ)
% Maximal formula atoms : 12 ( 3 avg)
% Number of connectives : 418 ( 167 ~; 204 |; 0 &)
% ( 47 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 10 ( 5 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of FOOLs : 16 ( 16 fml; 0 var)
% Number of types : 2 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of predicates : 8 ( 6 usr; 1 prp; 0-3 aty)
% Number of functors : 6 ( 6 usr; 3 con; 0-2 aty)
% Number of variables : 220 ( 198 !; 0 ?; 220 :)
% Comments :
%------------------------------------------------------------------------------
tff(subclass_type,type,
subclass: ( $i * $i ) > $o ).
tff(universal_class_type,type,
universal_class: $i ).
tff(singleton_type,type,
singleton: $i > $i ).
tff(x_type,type,
x: $i ).
tff(member_type,type,
member: ( $i * $i ) > $o ).
tff(unordered_pair_type,type,
unordered_pair: ( $i * $i ) > $i ).
tff(not_subclass_element_type,type,
not_subclass_element: ( $i * $i ) > $i ).
tff(y_type,type,
y: $i ).
tff(1,plain,
^ [X: $i] :
refl(( ( unordered_pair(X,X) = singleton(X) )
<=> ( unordered_pair(X,X) = singleton(X) ) )),
inference(bind,[status(th)],[]) ).
tff(2,plain,
( ! [X: $i] : ( unordered_pair(X,X) = singleton(X) )
<=> ! [X: $i] : ( unordered_pair(X,X) = singleton(X) ) ),
inference(quant_intro,[status(thm)],[1]) ).
tff(3,plain,
( ! [X: $i] : ( unordered_pair(X,X) = singleton(X) )
<=> ! [X: $i] : ( unordered_pair(X,X) = singleton(X) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(4,axiom,
! [X: $i] : ( unordered_pair(X,X) = singleton(X) ),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',singleton_set) ).
tff(5,plain,
! [X: $i] : ( unordered_pair(X,X) = singleton(X) ),
inference(modus_ponens,[status(thm)],[4,3]) ).
tff(6,plain,
! [X: $i] : ( unordered_pair(X,X) = singleton(X) ),
inference(skolemize,[status(sab)],[5]) ).
tff(7,plain,
! [X: $i] : ( unordered_pair(X,X) = singleton(X) ),
inference(modus_ponens,[status(thm)],[6,2]) ).
tff(8,plain,
( ~ ! [X: $i] : ( unordered_pair(X,X) = singleton(X) )
| ( unordered_pair(x,x) = singleton(x) ) ),
inference(quant_inst,[status(thm)],[]) ).
tff(9,plain,
unordered_pair(x,x) = singleton(x),
inference(unit_resolution,[status(thm)],[8,7]) ).
tff(10,plain,
singleton(x) = unordered_pair(x,x),
inference(symmetry,[status(thm)],[9]) ).
tff(11,plain,
( member(x,singleton(x))
<=> member(x,unordered_pair(x,x)) ),
inference(monotonicity,[status(thm)],[10]) ).
tff(12,plain,
( member(x,unordered_pair(x,x))
<=> member(x,singleton(x)) ),
inference(symmetry,[status(thm)],[11]) ).
tff(13,plain,
( member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x))
<=> member(not_subclass_element(singleton(x),unordered_pair(x,y)),singleton(x)) ),
inference(monotonicity,[status(thm)],[9]) ).
tff(14,plain,
( member(not_subclass_element(singleton(x),unordered_pair(x,y)),singleton(x))
<=> member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) ),
inference(symmetry,[status(thm)],[13]) ).
tff(15,plain,
( ~ subclass(singleton(x),unordered_pair(x,y))
<=> ~ subclass(singleton(x),unordered_pair(x,y)) ),
inference(rewrite,[status(thm)],[]) ).
tff(16,axiom,
~ subclass(singleton(x),unordered_pair(x,y)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_singleton_in_unordered_pair1_1) ).
tff(17,plain,
~ subclass(singleton(x),unordered_pair(x,y)),
inference(modus_ponens,[status(thm)],[16,15]) ).
tff(18,plain,
^ [Y: $i,X: $i] :
refl(( ( subclass(X,Y)
| member(not_subclass_element(X,Y),X) )
<=> ( subclass(X,Y)
| member(not_subclass_element(X,Y),X) ) )),
inference(bind,[status(th)],[]) ).
tff(19,plain,
( ! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) )
<=> ! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) ) ),
inference(quant_intro,[status(thm)],[18]) ).
tff(20,plain,
( ! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) )
<=> ! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(21,plain,
^ [Y: $i,X: $i] :
rewrite(( ( member(not_subclass_element(X,Y),X)
| subclass(X,Y) )
<=> ( subclass(X,Y)
| member(not_subclass_element(X,Y),X) ) )),
inference(bind,[status(th)],[]) ).
tff(22,plain,
( ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| subclass(X,Y) )
<=> ! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) ) ),
inference(quant_intro,[status(thm)],[21]) ).
tff(23,axiom,
! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| subclass(X,Y) ),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',not_subclass_members1) ).
tff(24,plain,
! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) ),
inference(modus_ponens,[status(thm)],[23,22]) ).
tff(25,plain,
! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) ),
inference(modus_ponens,[status(thm)],[24,20]) ).
tff(26,plain,
! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) ),
inference(skolemize,[status(sab)],[25]) ).
tff(27,plain,
! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) ),
inference(modus_ponens,[status(thm)],[26,19]) ).
tff(28,plain,
( ( ~ ! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) )
| subclass(singleton(x),unordered_pair(x,y))
| member(not_subclass_element(singleton(x),unordered_pair(x,y)),singleton(x)) )
<=> ( ~ ! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) )
| subclass(singleton(x),unordered_pair(x,y))
| member(not_subclass_element(singleton(x),unordered_pair(x,y)),singleton(x)) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(29,plain,
( ~ ! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) )
| subclass(singleton(x),unordered_pair(x,y))
| member(not_subclass_element(singleton(x),unordered_pair(x,y)),singleton(x)) ),
inference(quant_inst,[status(thm)],[]) ).
tff(30,plain,
( ~ ! [Y: $i,X: $i] :
( subclass(X,Y)
| member(not_subclass_element(X,Y),X) )
| subclass(singleton(x),unordered_pair(x,y))
| member(not_subclass_element(singleton(x),unordered_pair(x,y)),singleton(x)) ),
inference(modus_ponens,[status(thm)],[29,28]) ).
tff(31,plain,
member(not_subclass_element(singleton(x),unordered_pair(x,y)),singleton(x)),
inference(unit_resolution,[status(thm)],[30,27,17]) ).
tff(32,plain,
member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)),
inference(modus_ponens,[status(thm)],[31,14]) ).
tff(33,plain,
^ [Y: $i,U: $i,X: $i] :
refl(( ( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
<=> ( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) ) )),
inference(bind,[status(th)],[]) ).
tff(34,plain,
( ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
<=> ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) ) ),
inference(quant_intro,[status(thm)],[33]) ).
tff(35,plain,
( ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
<=> ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(36,plain,
^ [Y: $i,U: $i,X: $i] :
rewrite(( ( ~ member(U,unordered_pair(X,Y))
| ( U = X )
| ( U = Y ) )
<=> ( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) ) )),
inference(bind,[status(th)],[]) ).
tff(37,plain,
( ! [Y: $i,U: $i,X: $i] :
( ~ member(U,unordered_pair(X,Y))
| ( U = X )
| ( U = Y ) )
<=> ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) ) ),
inference(quant_intro,[status(thm)],[36]) ).
tff(38,axiom,
! [Y: $i,U: $i,X: $i] :
( ~ member(U,unordered_pair(X,Y))
| ( U = X )
| ( U = Y ) ),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',unordered_pair_member) ).
tff(39,plain,
! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) ),
inference(modus_ponens,[status(thm)],[38,37]) ).
tff(40,plain,
! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) ),
inference(modus_ponens,[status(thm)],[39,35]) ).
tff(41,plain,
! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) ),
inference(skolemize,[status(sab)],[40]) ).
tff(42,plain,
! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) ),
inference(modus_ponens,[status(thm)],[41,34]) ).
tff(43,plain,
( ( ~ ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) )
<=> ( ~ ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(44,plain,
( ( ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) )
<=> ( ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(45,plain,
( ( ~ ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) )
<=> ( ~ ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) ) ),
inference(monotonicity,[status(thm)],[44]) ).
tff(46,plain,
( ( ~ ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) )
<=> ( ~ ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) ) ),
inference(transitivity,[status(thm)],[45,43]) ).
tff(47,plain,
( ~ ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) ),
inference(quant_inst,[status(thm)],[]) ).
tff(48,plain,
( ~ ! [Y: $i,U: $i,X: $i] :
( ( U = Y )
| ( U = X )
| ~ member(U,unordered_pair(X,Y)) )
| ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) ),
inference(modus_ponens,[status(thm)],[47,46]) ).
tff(49,plain,
( ( not_subclass_element(singleton(x),unordered_pair(x,y)) = x )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,x)) ),
inference(unit_resolution,[status(thm)],[48,42]) ).
tff(50,plain,
not_subclass_element(singleton(x),unordered_pair(x,y)) = x,
inference(unit_resolution,[status(thm)],[49,32]) ).
tff(51,plain,
x = not_subclass_element(singleton(x),unordered_pair(x,y)),
inference(symmetry,[status(thm)],[50]) ).
tff(52,plain,
( member(x,unordered_pair(x,x))
<=> member(not_subclass_element(singleton(x),unordered_pair(x,y)),singleton(x)) ),
inference(monotonicity,[status(thm)],[51,9]) ).
tff(53,plain,
( member(not_subclass_element(singleton(x),unordered_pair(x,y)),singleton(x))
<=> member(x,unordered_pair(x,x)) ),
inference(symmetry,[status(thm)],[52]) ).
tff(54,plain,
member(x,unordered_pair(x,x)),
inference(modus_ponens,[status(thm)],[31,53]) ).
tff(55,plain,
member(x,singleton(x)),
inference(modus_ponens,[status(thm)],[54,12]) ).
tff(56,plain,
( member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,y))
<=> member(x,unordered_pair(x,y)) ),
inference(monotonicity,[status(thm)],[50]) ).
tff(57,plain,
( ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,y))
<=> ~ member(x,unordered_pair(x,y)) ),
inference(monotonicity,[status(thm)],[56]) ).
tff(58,plain,
^ [Y: $i,X: $i] :
refl(( ( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) )
<=> ( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) ) )),
inference(bind,[status(th)],[]) ).
tff(59,plain,
( ! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) )
<=> ! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) ) ),
inference(quant_intro,[status(thm)],[58]) ).
tff(60,plain,
( ! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) )
<=> ! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(61,axiom,
! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) ),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',not_subclass_members2) ).
tff(62,plain,
! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) ),
inference(modus_ponens,[status(thm)],[61,60]) ).
tff(63,plain,
! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) ),
inference(skolemize,[status(sab)],[62]) ).
tff(64,plain,
! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) ),
inference(modus_ponens,[status(thm)],[63,59]) ).
tff(65,plain,
( ( ~ ! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,y))
| subclass(singleton(x),unordered_pair(x,y)) )
<=> ( ~ ! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,y))
| subclass(singleton(x),unordered_pair(x,y)) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(66,plain,
( ~ ! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,y))
| subclass(singleton(x),unordered_pair(x,y)) ),
inference(quant_inst,[status(thm)],[]) ).
tff(67,plain,
( ~ ! [Y: $i,X: $i] :
( ~ member(not_subclass_element(X,Y),Y)
| subclass(X,Y) )
| ~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,y))
| subclass(singleton(x),unordered_pair(x,y)) ),
inference(modus_ponens,[status(thm)],[66,65]) ).
tff(68,plain,
~ member(not_subclass_element(singleton(x),unordered_pair(x,y)),unordered_pair(x,y)),
inference(unit_resolution,[status(thm)],[67,64,17]) ).
tff(69,plain,
~ member(x,unordered_pair(x,y)),
inference(modus_ponens,[status(thm)],[68,57]) ).
tff(70,plain,
^ [Y: $i,X: $i] :
refl(( ( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) )
<=> ( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) ) )),
inference(bind,[status(th)],[]) ).
tff(71,plain,
( ! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) )
<=> ! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) ) ),
inference(quant_intro,[status(thm)],[70]) ).
tff(72,plain,
( ! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) )
<=> ! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(73,axiom,
! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) ),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',unordered_pair2) ).
tff(74,plain,
! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) ),
inference(modus_ponens,[status(thm)],[73,72]) ).
tff(75,plain,
! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) ),
inference(skolemize,[status(sab)],[74]) ).
tff(76,plain,
! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) ),
inference(modus_ponens,[status(thm)],[75,71]) ).
tff(77,plain,
( ( ~ ! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) )
| ~ member(x,universal_class)
| member(x,unordered_pair(x,y)) )
<=> ( ~ ! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) )
| ~ member(x,universal_class)
| member(x,unordered_pair(x,y)) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(78,plain,
( ~ ! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) )
| ~ member(x,universal_class)
| member(x,unordered_pair(x,y)) ),
inference(quant_inst,[status(thm)],[]) ).
tff(79,plain,
( ~ ! [Y: $i,X: $i] :
( ~ member(X,universal_class)
| member(X,unordered_pair(X,Y)) )
| ~ member(x,universal_class)
| member(x,unordered_pair(x,y)) ),
inference(modus_ponens,[status(thm)],[78,77]) ).
tff(80,plain,
( ~ member(x,universal_class)
| member(x,unordered_pair(x,y)) ),
inference(unit_resolution,[status(thm)],[79,76]) ).
tff(81,plain,
~ member(x,universal_class),
inference(unit_resolution,[status(thm)],[80,69]) ).
tff(82,plain,
^ [Y: $i,U: $i,X: $i] :
refl(( ( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) )
<=> ( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ) )),
inference(bind,[status(th)],[]) ).
tff(83,plain,
( ! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) )
<=> ! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ) ),
inference(quant_intro,[status(thm)],[82]) ).
tff(84,plain,
( ! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) )
<=> ! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(85,plain,
^ [Y: $i,U: $i,X: $i] :
trans(monotonicity(rewrite(( ( ~ subclass(X,Y)
| ~ member(U,X) )
<=> ( ~ member(U,X)
| ~ subclass(X,Y) ) )),
( ( ~ subclass(X,Y)
| ~ member(U,X)
| member(U,Y) )
<=> ( ~ member(U,X)
| ~ subclass(X,Y)
| member(U,Y) ) )),
rewrite(( ( ~ member(U,X)
| ~ subclass(X,Y)
| member(U,Y) )
<=> ( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ) )),
( ( ~ subclass(X,Y)
| ~ member(U,X)
| member(U,Y) )
<=> ( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ) )),
inference(bind,[status(th)],[]) ).
tff(86,plain,
( ! [Y: $i,U: $i,X: $i] :
( ~ subclass(X,Y)
| ~ member(U,X)
| member(U,Y) )
<=> ! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ) ),
inference(quant_intro,[status(thm)],[85]) ).
tff(87,axiom,
! [Y: $i,U: $i,X: $i] :
( ~ subclass(X,Y)
| ~ member(U,X)
| member(U,Y) ),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',subclass_members) ).
tff(88,plain,
! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ),
inference(modus_ponens,[status(thm)],[87,86]) ).
tff(89,plain,
! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ),
inference(modus_ponens,[status(thm)],[88,84]) ).
tff(90,plain,
! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ),
inference(skolemize,[status(sab)],[89]) ).
tff(91,plain,
! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) ),
inference(modus_ponens,[status(thm)],[90,83]) ).
tff(92,plain,
( ( ~ ! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) )
| member(x,universal_class)
| ~ member(x,singleton(x))
| ~ subclass(singleton(x),universal_class) )
<=> ( ~ ! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) )
| member(x,universal_class)
| ~ member(x,singleton(x))
| ~ subclass(singleton(x),universal_class) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(93,plain,
( ~ ! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) )
| member(x,universal_class)
| ~ member(x,singleton(x))
| ~ subclass(singleton(x),universal_class) ),
inference(quant_inst,[status(thm)],[]) ).
tff(94,plain,
( ~ ! [Y: $i,U: $i,X: $i] :
( member(U,Y)
| ~ member(U,X)
| ~ subclass(X,Y) )
| member(x,universal_class)
| ~ member(x,singleton(x))
| ~ subclass(singleton(x),universal_class) ),
inference(modus_ponens,[status(thm)],[93,92]) ).
tff(95,plain,
( ~ member(x,singleton(x))
| ~ subclass(singleton(x),universal_class) ),
inference(unit_resolution,[status(thm)],[94,91,81]) ).
tff(96,plain,
~ subclass(singleton(x),universal_class),
inference(unit_resolution,[status(thm)],[95,55]) ).
tff(97,plain,
^ [X: $i] :
refl(( subclass(X,universal_class)
<=> subclass(X,universal_class) )),
inference(bind,[status(th)],[]) ).
tff(98,plain,
( ! [X: $i] : subclass(X,universal_class)
<=> ! [X: $i] : subclass(X,universal_class) ),
inference(quant_intro,[status(thm)],[97]) ).
tff(99,plain,
( ! [X: $i] : subclass(X,universal_class)
<=> ! [X: $i] : subclass(X,universal_class) ),
inference(rewrite,[status(thm)],[]) ).
tff(100,axiom,
! [X: $i] : subclass(X,universal_class),
file('/export/starexec/sandbox/benchmark/Axioms/SET004-0.ax',class_elements_are_sets) ).
tff(101,plain,
! [X: $i] : subclass(X,universal_class),
inference(modus_ponens,[status(thm)],[100,99]) ).
tff(102,plain,
! [X: $i] : subclass(X,universal_class),
inference(skolemize,[status(sab)],[101]) ).
tff(103,plain,
! [X: $i] : subclass(X,universal_class),
inference(modus_ponens,[status(thm)],[102,98]) ).
tff(104,plain,
( ~ ! [X: $i] : subclass(X,universal_class)
| subclass(singleton(x),universal_class) ),
inference(quant_inst,[status(thm)],[]) ).
tff(105,plain,
$false,
inference(unit_resolution,[status(thm)],[104,103,96]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.10/0.11 % Problem : SET067-7 : TPTP v9.0.0. Bugfixed v2.1.0.
% 0.10/0.11 % Command : run_E %s %d THM
% 0.11/0.32 % Computer : n010.cluster.edu
% 0.11/0.32 % Model : x86_64 x86_64
% 0.11/0.32 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.32 % Memory : 8042.1875MB
% 0.11/0.32 % OS : Linux 3.10.0-693.el7.x86_64
% 0.11/0.32 % CPULimit : 300
% 0.11/0.32 % WCLimit : 300
% 0.11/0.32 % DateTime : Fri Jun 20 04:13:57 EDT 2025
% 0.11/0.32 % CPUTime :
% 0.19/0.41 % SZS status Unsatisfiable
% 0.19/0.41 % SZS output start Proof
% See solution above
% 0.19/0.43 % E exiting
%------------------------------------------------------------------------------