%------------------------------------------------------------------------------
% File : Z3---4.15.1
% Problem : SET064-7 : TPTP v9.0.0. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp
% Command : run_E %s %d THM
% Computer : n012.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 05:25:03 AM UTC 2025
% Result : Unsatisfiable 0.20s 0.41s
% Output : Proof 0.20s
% Verified :
% SZS Type : Refutation
% Derivation depth : 7
% Number of leaves : 15
% Syntax : Number of formulae : 32 ( 13 unt; 0 typ; 0 def)
% Number of atoms : 124 ( 37 equ)
% Maximal formula atoms : 12 ( 3 avg)
% Number of connectives : 118 ( 29 ~; 75 |; 0 &)
% ( 14 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 8 ( 4 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of FOOLs : 3 ( 3 fml; 0 var)
% Number of types : 2 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of predicates : 5 ( 3 usr; 1 prp; 0-2 aty)
% Number of functors : 3 ( 3 usr; 2 con; 0-2 aty)
% Number of variables : 52 ( 47 !; 0 ?; 52 :)
% Comments :
%------------------------------------------------------------------------------
tff(member_type,type,
member: ( $i * $i ) > $o ).
tff(null_class_type,type,
null_class: $i ).
tff(not_subclass_element_type,type,
not_subclass_element: ( $i * $i ) > $i ).
tff(z_type,type,
z: $i ).
tff(1,plain,
( ~ member(not_subclass_element(z,null_class),z)
<=> ~ member(not_subclass_element(z,null_class),z) ),
inference(rewrite,[status(thm)],[]) ).
tff(2,axiom,
~ member(not_subclass_element(z,null_class),z),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_null_class_is_unique_2) ).
tff(3,plain,
~ member(not_subclass_element(z,null_class),z),
inference(modus_ponens,[status(thm)],[2,1]) ).
tff(4,plain,
( ( z != null_class )
<=> ( z != null_class ) ),
inference(rewrite,[status(thm)],[]) ).
tff(5,axiom,
z != null_class,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_null_class_is_unique_1) ).
tff(6,plain,
z != null_class,
inference(modus_ponens,[status(thm)],[5,4]) ).
tff(7,plain,
^ [Y: $i,X: $i] :
refl(( ( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
<=> ( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) ) )),
inference(bind,[status(th)],[]) ).
tff(8,plain,
( ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
<=> ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) ) ),
inference(quant_intro,[status(thm)],[7]) ).
tff(9,plain,
( ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
<=> ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(10,plain,
^ [Y: $i,X: $i] :
rewrite(( ( ( X = Y )
| member(not_subclass_element(X,Y),X)
| member(not_subclass_element(Y,X),Y) )
<=> ( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) ) )),
inference(bind,[status(th)],[]) ).
tff(11,plain,
( ! [Y: $i,X: $i] :
( ( X = Y )
| member(not_subclass_element(X,Y),X)
| member(not_subclass_element(Y,X),Y) )
<=> ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) ) ),
inference(quant_intro,[status(thm)],[10]) ).
tff(12,axiom,
! [Y: $i,X: $i] :
( ( X = Y )
| member(not_subclass_element(X,Y),X)
| member(not_subclass_element(Y,X),Y) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',equality1) ).
tff(13,plain,
! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) ),
inference(modus_ponens,[status(thm)],[12,11]) ).
tff(14,plain,
! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) ),
inference(modus_ponens,[status(thm)],[13,9]) ).
tff(15,plain,
! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) ),
inference(skolemize,[status(sab)],[14]) ).
tff(16,plain,
! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) ),
inference(modus_ponens,[status(thm)],[15,8]) ).
tff(17,plain,
( ( ~ ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
| ( z = null_class )
| member(not_subclass_element(z,null_class),z)
| member(not_subclass_element(null_class,z),null_class) )
<=> ( ~ ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
| ( z = null_class )
| member(not_subclass_element(z,null_class),z)
| member(not_subclass_element(null_class,z),null_class) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(18,plain,
( ( member(not_subclass_element(z,null_class),z)
| ( z = null_class )
| member(not_subclass_element(null_class,z),null_class) )
<=> ( ( z = null_class )
| member(not_subclass_element(z,null_class),z)
| member(not_subclass_element(null_class,z),null_class) ) ),
inference(rewrite,[status(thm)],[]) ).
tff(19,plain,
( ( ~ ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
| member(not_subclass_element(z,null_class),z)
| ( z = null_class )
| member(not_subclass_element(null_class,z),null_class) )
<=> ( ~ ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
| ( z = null_class )
| member(not_subclass_element(z,null_class),z)
| member(not_subclass_element(null_class,z),null_class) ) ),
inference(monotonicity,[status(thm)],[18]) ).
tff(20,plain,
( ( ~ ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
| member(not_subclass_element(z,null_class),z)
| ( z = null_class )
| member(not_subclass_element(null_class,z),null_class) )
<=> ( ~ ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
| ( z = null_class )
| member(not_subclass_element(z,null_class),z)
| member(not_subclass_element(null_class,z),null_class) ) ),
inference(transitivity,[status(thm)],[19,17]) ).
tff(21,plain,
( ~ ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
| member(not_subclass_element(z,null_class),z)
| ( z = null_class )
| member(not_subclass_element(null_class,z),null_class) ),
inference(quant_inst,[status(thm)],[]) ).
tff(22,plain,
( ~ ! [Y: $i,X: $i] :
( member(not_subclass_element(X,Y),X)
| ( X = Y )
| member(not_subclass_element(Y,X),Y) )
| ( z = null_class )
| member(not_subclass_element(z,null_class),z)
| member(not_subclass_element(null_class,z),null_class) ),
inference(modus_ponens,[status(thm)],[21,20]) ).
tff(23,plain,
member(not_subclass_element(null_class,z),null_class),
inference(unit_resolution,[status(thm)],[22,16,6,3]) ).
tff(24,plain,
^ [Z: $i] :
refl(( ~ member(Z,null_class)
<=> ~ member(Z,null_class) )),
inference(bind,[status(th)],[]) ).
tff(25,plain,
( ! [Z: $i] : ~ member(Z,null_class)
<=> ! [Z: $i] : ~ member(Z,null_class) ),
inference(quant_intro,[status(thm)],[24]) ).
tff(26,plain,
( ! [Z: $i] : ~ member(Z,null_class)
<=> ! [Z: $i] : ~ member(Z,null_class) ),
inference(rewrite,[status(thm)],[]) ).
tff(27,axiom,
! [Z: $i] : ~ member(Z,null_class),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',existence_of_null_class) ).
tff(28,plain,
! [Z: $i] : ~ member(Z,null_class),
inference(modus_ponens,[status(thm)],[27,26]) ).
tff(29,plain,
! [Z: $i] : ~ member(Z,null_class),
inference(skolemize,[status(sab)],[28]) ).
tff(30,plain,
! [Z: $i] : ~ member(Z,null_class),
inference(modus_ponens,[status(thm)],[29,25]) ).
tff(31,plain,
( ~ ! [Z: $i] : ~ member(Z,null_class)
| ~ member(not_subclass_element(null_class,z),null_class) ),
inference(quant_inst,[status(thm)],[]) ).
tff(32,plain,
$false,
inference(unit_resolution,[status(thm)],[31,30,23]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.13 % Problem : SET064-7 : TPTP v9.0.0. Bugfixed v2.1.0.
% 0.07/0.13 % Command : run_E %s %d THM
% 0.13/0.34 % Computer : n012.cluster.edu
% 0.13/0.34 % Model : x86_64 x86_64
% 0.13/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.34 % Memory : 8042.1875MB
% 0.13/0.34 % OS : Linux 3.10.0-693.el7.x86_64
% 0.13/0.34 % CPULimit : 300
% 0.13/0.34 % WCLimit : 300
% 0.13/0.34 % DateTime : Fri Jun 20 04:09:55 EDT 2025
% 0.13/0.34 % CPUTime :
% 0.20/0.41 % SZS status Unsatisfiable
% 0.20/0.41 % SZS output start Proof
% See solution above
% 0.20/0.42 % E exiting
%------------------------------------------------------------------------------