<s>
TAPAAL	B-Application
is	O
a	O
tool	O
for	O
modelling	O
,	O
simulation	B-Application
and	O
verification	O
of	O
Timed-Arc	O
Petri	B-Operating_System
nets	I-Operating_System
developed	O
at	O
Department	O
of	O
Computer	O
Science	O
at	O
Aalborg	O
University	O
in	O
Denmark	O
and	O
it	O
is	O
available	O
for	O
Linux	B-Application
,	O
Windows	O
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
platforms	O
.	O
</s>
<s>
Timed-Arc	O
Petri	B-Operating_System
Net	I-Operating_System
(	O
TAPN	O
)	O
is	O
a	O
time	O
extension	O
of	O
the	O
classical	O
Petri	B-Operating_System
net	I-Operating_System
model	O
(	O
a	O
commonly	O
used	O
graphical	O
model	O
of	O
distributed	O
computations	O
introduced	O
by	O
Carl	O
Adam	O
Petri	O
in	O
his	O
dissertation	O
in	O
1962	O
)	O
.	O
</s>
<s>
In	O
TAPAAL	B-Application
tool	O
a	O
further	O
extension	O
of	O
this	O
model	O
with	O
age	O
invariants	O
with	O
transport	O
arcs	O
(	O
which	O
are	O
more	O
expressive	O
than	O
for	O
example	O
previously	O
considered	O
read-arcs	O
)	O
and	O
with	O
inhibitor	O
arcs	O
is	O
implemented	O
.	O
</s>
<s>
The	O
TAPAAL	B-Application
tool	O
offers	O
a	O
graphical	O
editor	O
for	O
drawing	O
TAPN	O
models	O
,	O
simulator	O
for	O
experimenting	O
with	O
the	O
designed	O
nets	O
and	O
a	O
verification	O
environment	O
that	O
automatically	O
answers	O
logical	O
queries	O
formulated	O
in	O
a	O
subset	O
of	O
CTL	O
logic	O
(	O
essentially	O
EF	O
,	O
EG	O
,	O
AF	O
,	O
AG	O
formulae	O
without	O
nesting	O
)	O
.	O
</s>
<s>
It	O
also	O
allows	O
the	O
user	O
to	O
check	O
whether	O
a	O
given	O
net	O
is	O
k-bounded	O
for	O
a	O
given	O
number	O
k	O
.	O
TAPAAL	B-Application
is	O
equipped	O
with	O
its	O
own	O
verification	O
engines	O
distributed	O
together	O
with	O
TAPAAL	B-Application
(	O
one	O
for	O
continuous	O
time	O
and	O
one	O
for	O
discrete	O
time	O
)	O
.	O
</s>
<s>
into	O
UPPAAL	B-Application
and	O
rely	O
on	O
the	O
UPPAAL	B-Application
verification	O
engine	O
.	O
</s>
