%------------------------------------------------------------------------------
% File : Z3---4.15.1
% Problem : SET093-7 : TPTP v9.0.0. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp
% Command : run_E %s %d THM
% Computer : n011.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 05:25:11 AM UTC 2025
% Result : Unsatisfiable 0.22s 0.42s
% Output : Proof 0.22s
% Verified :
% SZS Type : Refutation
% Derivation depth : 6
% Number of leaves : 8
% Syntax : Number of formulae : 20 ( 12 unt; 0 typ; 0 def)
% Number of atoms : 30 ( 4 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 17 ( 8 ~; 1 |; 0 &)
% ( 8 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 2 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of FOOLs : 1 ( 1 fml; 0 var)
% Number of types : 2 ( 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 : 4 ( 4 usr; 2 con; 0-1 aty)
% Number of variables : 10 ( 9 !; 0 ?; 10 :)
% Comments :
%------------------------------------------------------------------------------
tff(member_type,type,
member: ( $i * $i ) > $o ).
tff(universal_class_type,type,
universal_class: $i ).
tff(singleton_type,type,
singleton: $i > $i ).
tff(member_of_type,type,
member_of: $i > $i ).
tff(x_type,type,
x: $i ).
tff(1,plain,
( ( singleton(member_of(x)) = x )
<=> ( singleton(member_of(x)) = x ) ),
inference(rewrite,[status(thm)],[]) ).
tff(2,axiom,
singleton(member_of(x)) = x,
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_corollary_2_to_singletons_are_sets_1) ).
tff(3,plain,
singleton(member_of(x)) = x,
inference(modus_ponens,[status(thm)],[2,1]) ).
tff(4,plain,
( member(singleton(member_of(x)),universal_class)
<=> member(x,universal_class) ),
inference(monotonicity,[status(thm)],[3]) ).
tff(5,plain,
( member(x,universal_class)
<=> member(singleton(member_of(x)),universal_class) ),
inference(symmetry,[status(thm)],[4]) ).
tff(6,plain,
( ~ member(x,universal_class)
<=> ~ member(singleton(member_of(x)),universal_class) ),
inference(monotonicity,[status(thm)],[5]) ).
tff(7,plain,
( ~ member(x,universal_class)
<=> ~ member(x,universal_class) ),
inference(rewrite,[status(thm)],[]) ).
tff(8,axiom,
~ member(x,universal_class),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_corollary_2_to_singletons_are_sets_2) ).
tff(9,plain,
~ member(x,universal_class),
inference(modus_ponens,[status(thm)],[8,7]) ).
tff(10,plain,
~ member(singleton(member_of(x)),universal_class),
inference(modus_ponens,[status(thm)],[9,6]) ).
tff(11,plain,
^ [X: $i] :
refl(( member(singleton(X),universal_class)
<=> member(singleton(X),universal_class) )),
inference(bind,[status(th)],[]) ).
tff(12,plain,
( ! [X: $i] : member(singleton(X),universal_class)
<=> ! [X: $i] : member(singleton(X),universal_class) ),
inference(quant_intro,[status(thm)],[11]) ).
tff(13,plain,
( ! [X: $i] : member(singleton(X),universal_class)
<=> ! [X: $i] : member(singleton(X),universal_class) ),
inference(rewrite,[status(thm)],[]) ).
tff(14,axiom,
! [X: $i] : member(singleton(X),universal_class),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',singletons_are_sets) ).
tff(15,plain,
! [X: $i] : member(singleton(X),universal_class),
inference(modus_ponens,[status(thm)],[14,13]) ).
tff(16,plain,
! [X: $i] : member(singleton(X),universal_class),
inference(skolemize,[status(sab)],[15]) ).
tff(17,plain,
! [X: $i] : member(singleton(X),universal_class),
inference(modus_ponens,[status(thm)],[16,12]) ).
tff(18,plain,
( ~ ! [X: $i] : member(singleton(X),universal_class)
| member(singleton(member_of(x)),universal_class) ),
inference(quant_inst,[status(thm)],[]) ).
tff(19,plain,
member(singleton(member_of(x)),universal_class),
inference(unit_resolution,[status(thm)],[18,17]) ).
tff(20,plain,
$false,
inference(unit_resolution,[status(thm)],[19,10]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.09/0.13 % Problem : SET093-7 : TPTP v9.0.0. Bugfixed v2.1.0.
% 0.09/0.13 % Command : run_E %s %d THM
% 0.14/0.35 % Computer : n011.cluster.edu
% 0.14/0.35 % Model : x86_64 x86_64
% 0.14/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.35 % Memory : 8042.1875MB
% 0.14/0.35 % OS : Linux 3.10.0-693.el7.x86_64
% 0.14/0.35 % CPULimit : 300
% 0.14/0.35 % WCLimit : 300
% 0.14/0.35 % DateTime : Fri Jun 20 04:15:56 EDT 2025
% 0.14/0.35 % CPUTime :
% 0.22/0.42 % SZS status Unsatisfiable
% 0.22/0.42 % SZS output start Proof
% See solution above
% 0.22/0.43 % E exiting
%------------------------------------------------------------------------------