<s>
CADP	B-Application
(	O
Construction	B-Application
and	I-Application
Analysis	I-Application
of	I-Application
Distributed	I-Application
Processes	I-Application
)	O
is	O
a	O
toolbox	O
for	O
the	O
design	O
of	O
communication	O
protocols	O
and	O
distributed	O
systems	O
.	O
</s>
<s>
CADP	B-Application
is	O
developed	O
by	O
the	O
CONVECS	O
team	O
(	O
formerly	O
by	O
the	O
VASY	O
team	O
)	O
at	O
INRIA	O
Rhone-Alpes	O
and	O
connected	O
to	O
various	O
complementary	O
tools	O
.	O
</s>
<s>
CADP	B-Application
is	O
maintained	O
,	O
regularly	O
improved	O
,	O
and	O
used	O
in	O
many	O
industrial	O
projects	O
.	O
</s>
<s>
The	O
purpose	O
of	O
the	O
CADP	B-Application
toolkit	O
is	O
to	O
facilitate	O
the	O
design	O
of	O
reliable	O
systems	O
by	O
use	O
of	O
formal	O
description	O
techniques	O
together	O
with	O
software	O
tools	O
for	O
simulation	O
,	O
rapid	O
application	O
development	O
,	O
verification	O
,	O
and	O
test	O
generation	O
.	O
</s>
<s>
CADP	B-Application
can	O
be	O
applied	O
to	O
any	O
system	O
that	O
comprises	O
asynchronous	O
concurrency	O
,	O
i.e.	O
,	O
any	O
system	O
whose	O
behavior	O
can	O
be	O
modeled	O
as	O
a	O
set	O
of	O
parallel	O
processes	O
governed	O
by	O
interleaving	O
semantics	O
.	O
</s>
<s>
Therefore	O
,	O
CADP	B-Application
can	O
be	O
used	O
to	O
design	O
hardware	O
architecture	O
,	O
distributed	O
algorithms	O
,	O
telecommunications	O
protocols	O
,	O
etc	O
.	O
</s>
<s>
The	O
enumerative	O
verification	O
(	O
also	O
known	O
as	O
explicit	O
state	O
verification	O
)	O
techniques	O
implemented	O
in	O
CADP	B-Application
,	O
though	O
less	O
general	O
that	O
theorem	O
proving	O
,	O
enable	O
an	O
automatic	O
,	O
cost-efficient	O
detection	O
of	O
design	O
errors	O
in	O
complex	O
systems	O
.	O
</s>
<s>
CADP	B-Application
includes	O
tools	O
to	O
support	O
use	O
of	O
two	O
approaches	O
in	O
formal	O
methods	O
,	O
both	O
of	O
which	O
are	O
needed	O
for	O
reliable	O
systems	O
design	O
:	O
</s>
<s>
Work	O
began	O
on	O
CADP	B-Application
in	O
1986	O
,	O
when	O
the	O
development	O
of	O
the	O
first	O
two	O
tools	O
,	O
CAESAR	O
and	O
ALDEBARAN	O
,	O
was	O
undertaken	O
.	O
</s>
<s>
In	O
1989	O
,	O
the	O
CADP	B-Application
acronym	O
was	O
coined	O
,	O
which	O
stood	O
for	O
CAESAR/ALDEBARAN	O
Distribution	O
Package	O
.	O
</s>
<s>
Over	O
time	O
,	O
several	O
tools	O
were	O
added	O
,	O
including	O
programming	O
interfaces	O
that	O
enabled	O
tools	O
to	O
be	O
contributed	O
:	O
the	O
CADP	B-Application
acronym	O
then	O
became	O
the	O
CAESAR/ALDEBARAN	O
Development	O
Package	O
.	O
</s>
<s>
Currently	O
CADP	B-Application
contains	O
over	O
50	O
tools	O
.	O
</s>
<s>
Construction	B-Application
and	I-Application
Analysis	I-Application
of	I-Application
Distributed	I-Application
Processes	I-Application
.	O
</s>
<s>
The	O
releases	O
of	O
CADP	B-Application
have	O
been	O
successively	O
named	O
with	O
alphabetic	O
letters	O
(	O
from	O
"	O
A	O
"	O
to	O
"	O
Z	O
"	O
)	O
,	O
then	O
with	O
the	O
names	O
of	O
cities	O
hosting	O
academic	O
research	O
groups	O
actively	O
working	O
on	O
the	O
LOTOS	B-Application
language	O
and	O
,	O
more	O
generally	O
,	O
the	O
names	O
of	O
cities	O
in	O
which	O
major	O
contributions	O
to	O
concurrency	O
theory	O
have	O
been	O
made	O
.	O
</s>
<s>
For	O
more	O
information	O
,	O
see	O
the	O
page	O
on	O
the	O
CADP	B-Application
website	O
.	O
</s>
<s>
CADP	B-Application
offers	O
a	O
wide	O
set	O
of	O
functionalities	O
,	O
ranging	O
from	O
step-by-step	O
simulation	O
to	O
massively	O
parallel	O
model	B-Application
checking	I-Application
.	O
</s>
<s>
High-level	O
protocol	O
descriptions	O
written	O
in	O
the	O
ISO	O
language	O
LOTOS	B-Application
.	O
</s>
<s>
The	O
toolbox	O
contains	O
two	O
compilers	O
(	O
CAESAR	O
and	O
CAESAR.ADT	O
)	O
that	O
translate	O
LOTOS	B-Application
descriptions	O
into	O
C	O
code	O
to	O
be	O
used	O
for	O
simulation	O
,	O
verification	O
,	O
and	O
testing	O
purposes	O
.	O
</s>
<s>
Several	O
equivalence	B-Application
checking	I-Application
tools	O
(	O
minimization	O
and	O
comparisons	O
modulo	O
bisimulation	O
relations	O
)	O
,	O
such	O
as	O
BCG_MIN	O
and	O
BISIMULATOR	O
.	O
</s>
<s>
Several	O
model-checkers	B-Application
for	O
various	O
temporal	O
logic	O
and	O
mu-calculus	O
,	O
such	O
as	O
EVALUATOR	O
and	O
XTL	O
.	O
</s>
<s>
Several	O
verification	O
algorithms	O
combined	O
:	O
enumerative	O
verification	O
,	O
on-the-fly	O
verification	O
,	O
symbolic	O
verification	O
using	O
binary	O
decision	O
diagrams	O
,	O
compositional	O
minimization	O
,	O
partial	O
orders	O
,	O
distributed	O
model	B-Application
checking	I-Application
,	O
etc	O
.	O
</s>
<s>
CADP	B-Application
is	O
designed	O
in	O
a	O
modular	O
way	O
and	O
puts	O
the	O
emphasis	O
on	O
intermediate	O
formats	O
and	O
programming	O
interfaces	O
(	O
such	O
as	O
the	O
BCG	O
and	O
OPEN/CAESAR	O
software	O
environments	O
)	O
,	O
which	O
allow	O
the	O
CADP	B-Application
tools	O
to	O
be	O
combined	O
with	O
other	O
tools	O
and	O
adapted	O
to	O
various	O
specification	O
languages	O
.	O
</s>
<s>
Most	O
of	O
the	O
verification	O
algorithms	O
in	O
CADP	B-Application
are	O
based	O
on	O
the	O
labeled	O
transition	O
systems	O
(	O
or	O
,	O
simply	O
,	O
automata	O
or	O
graphs	O
)	O
model	O
,	O
which	O
consists	O
of	O
a	O
set	O
of	O
states	O
,	O
an	O
initial	O
state	O
,	O
and	O
a	O
transition	O
relation	O
between	O
states	O
.	O
</s>
<s>
In	O
such	O
a	O
case	O
,	O
the	O
natural	O
approach	O
to	O
verification	O
is	O
equivalence	B-Application
checking	I-Application
,	O
which	O
consists	O
in	O
comparing	O
the	O
system	O
model	O
and	O
its	O
properties	O
(	O
both	O
represented	O
as	O
automata	O
)	O
modulo	O
some	O
equivalence	O
or	O
preorder	O
relation	O
.	O
</s>
<s>
CADP	B-Application
contains	O
equivalence	B-Application
checking	I-Application
tools	O
that	O
compare	O
and	O
minimize	O
automata	O
modulo	O
various	O
equivalence	O
and	O
preorder	O
relations	O
;	O
some	O
of	O
these	O
tools	O
also	O
apply	O
to	O
stochastic	O
and	O
probabilistic	O
models	O
(	O
such	O
as	O
Markov	O
chains	O
)	O
.	O
</s>
<s>
CADP	B-Application
also	O
contains	O
visual	O
checking	O
tools	O
that	O
can	O
be	O
used	O
to	O
verify	O
a	O
graphical	O
representation	O
of	O
the	O
system	O
.	O
</s>
<s>
In	O
such	O
a	O
case	O
,	O
the	O
natural	O
approach	O
to	O
verification	O
is	O
model	B-Application
checking	I-Application
,	O
which	O
consists	O
of	O
deciding	O
whether	O
or	O
not	O
the	O
system	O
model	O
satisfies	O
the	O
logical	O
properties	O
.	O
</s>
<s>
CADP	B-Application
contains	O
model	B-Application
checking	I-Application
tools	O
for	O
a	O
powerful	O
form	O
of	O
temporal	O
logic	O
,	O
the	O
modal	O
mu-calculus	O
,	O
which	O
is	O
extended	O
with	O
typed	O
variables	O
and	O
expressions	O
so	O
as	O
to	O
express	O
predicates	O
over	O
the	O
data	O
contained	O
in	O
the	O
model	O
.	O
</s>
<s>
CADP	B-Application
provides	O
software	O
technologies	O
for	O
handling	O
models	O
in	O
two	O
complementary	O
ways	O
:	O
</s>
<s>
CADP	B-Application
acts	O
on	O
a	O
LOTOS	B-Application
description	O
of	O
the	O
system	O
.	O
</s>
<s>
LOTOS	B-Application
is	O
an	O
international	O
standard	O
for	O
protocol	O
description	O
(	O
ISO/IEC	O
standard	O
8807:1989	O
)	O
,	O
which	O
combines	O
the	O
concepts	O
of	O
process	O
algebras	O
(	O
in	O
particular	O
CCS	O
and	O
CSP	O
and	O
algebraic	O
abstract	O
data	O
types	O
.	O
</s>
<s>
Thus	O
,	O
LOTOS	B-Application
can	O
describe	O
both	O
asynchronous	O
concurrent	O
processes	O
and	O
complex	O
data	O
structures	O
.	O
</s>
<s>
LOTOS	B-Application
was	O
heavily	O
revised	O
in	O
2001	O
,	O
leading	O
to	O
the	O
publication	O
of	O
E-LOTOS	O
(	O
Enhanced-Lotos	O
,	O
ISO/IEC	O
standard	O
15437:2001	O
)	O
,	O
which	O
tries	O
to	O
provide	O
a	O
greater	O
expressiveness	O
(	O
for	O
instance	O
,	O
by	O
introducing	O
quantitative	O
time	O
to	O
describe	O
systems	O
with	O
real-time	O
constraints	O
)	O
together	O
with	O
a	O
better	O
user	O
friendliness	O
.	O
</s>
<s>
Several	O
tools	O
exist	O
to	O
convert	O
descriptions	O
in	O
other	O
process	O
calculi	O
or	O
intermediate	O
format	O
into	O
LOTOS	B-Application
,	O
so	O
that	O
the	O
CADP	B-Application
tools	O
can	O
then	O
be	O
used	O
for	O
verification	O
.	O
</s>
<s>
CADP	B-Application
is	O
distributed	O
free	O
of	O
charge	O
to	O
universities	O
and	O
public	O
research	O
centers	O
.	O
</s>
<s>
To	O
request	O
a	O
copy	O
of	O
CADP	B-Application
,	O
complete	O
the	O
registration	O
form	O
at	O
.	O
</s>
<s>
After	O
the	O
license	O
agreement	O
has	O
been	O
signed	O
,	O
you	O
will	O
receive	O
details	O
of	O
how	O
to	O
download	O
and	O
install	O
CADP	B-Application
.	O
</s>
<s>
CAESAR.ADT	O
is	O
a	O
compiler	O
that	O
translates	O
LOTOS	B-Application
abstract	O
data	O
types	O
into	O
C	O
types	O
and	O
C	O
functions	O
.	O
</s>
<s>
CAESAR	O
is	O
a	O
compiler	O
that	O
translates	O
LOTOS	B-Application
processes	O
into	O
either	O
C	O
code	O
(	O
for	O
rapid	O
prototyping	O
and	O
testing	O
purposes	O
)	O
or	O
finite	O
graphs	O
(	O
for	O
verification	O
)	O
.	O
</s>
<s>
In	O
this	O
respect	O
,	O
OPEN/CAESAR	O
plays	O
a	O
central	O
role	O
in	O
CADP	B-Application
by	O
connecting	O
language-oriented	O
tools	O
with	O
model-oriented	O
tools	O
.	O
</s>
<s>
BCG	O
also	O
plays	O
a	O
key	O
role	O
in	O
CADP	B-Application
as	O
many	O
tools	O
rely	O
on	O
this	O
format	O
for	O
their	O
inputs/outputs	O
.	O
</s>
<s>
The	O
CADP	B-Application
toolbox	O
also	O
includes	O
additional	O
tools	O
,	O
such	O
as	O
ALDEBARAN	O
and	O
TGV	O
(	O
Test	O
Generation	O
based	O
on	O
Verification	O
)	O
developed	O
by	O
the	O
Verimag	O
laboratory	O
(	O
Grenoble	O
)	O
and	O
the	O
Vertecs	O
project-team	O
of	O
INRIA	O
Rennes	O
.	O
</s>
<s>
The	O
CADP	B-Application
tools	O
are	O
well-integrated	O
and	O
can	O
be	O
accessed	O
easily	O
using	O
either	O
the	O
EUCALYPTUS	O
graphical	O
interface	O
or	O
the	O
SVL	O
scripting	O
language	O
.	O
</s>
<s>
Both	O
EUCALYPTUS	O
and	O
SVL	O
provide	O
users	O
with	O
an	O
easy	O
,	O
uniform	O
access	O
to	O
the	O
CADP	B-Application
tools	O
by	O
performing	O
file	O
format	O
conversions	O
automatically	O
whenever	O
needed	O
and	O
by	O
supplying	O
appropriate	O
command-line	O
options	O
as	O
the	O
tools	O
are	O
invoked	O
.	O
</s>
<s>
In	O
2002	O
,	O
Radu	O
Mateescu	O
,	O
who	O
designed	O
and	O
developed	O
the	O
EVALUATOR	O
model	B-Application
checker	I-Application
of	O
CADP	B-Application
,	O
received	O
the	O
Information	O
Technology	O
Award	O
attributed	O
during	O
the	O
10th	O
edition	O
of	O
the	O
yearly	O
symposium	O
organized	O
by	O
the	O
Foundation	O
Rhône-Alpes	O
Futur	O
.	O
</s>
<s>
In	O
2011	O
,	O
Hubert	O
Garavel	O
,	O
software	O
architect	O
and	O
developer	O
of	O
CADP	B-Application
,	O
received	O
the	O
Gay-Lussac	O
Humboldt	O
Prize	O
.	O
</s>
<s>
In	O
2019	O
,	O
Frédéric	O
Lang	O
and	O
Franco	O
Mazzanti	O
won	O
all	O
the	O
gold	O
medals	O
for	O
the	O
parallel	O
problems	O
of	O
the	O
RERS	O
challenge	O
by	O
using	O
CADP	B-Application
to	O
successfully	O
and	O
correctly	O
evaluate	O
360	O
computational	O
tree	O
logic	O
(	O
CTL	O
)	O
and	O
linear	O
temporal	O
logic	O
(	O
LTL	O
)	O
formulas	O
on	O
various	O
sets	O
of	O
communicating	O
state	O
machines	O
.	O
</s>
<s>
In	O
2021	O
,	O
Hubert	O
Garavel	O
,	O
Frédéric	O
Lang	O
,	O
Radu	O
Mateescu	O
,	O
and	O
Wendelin	O
Serwe	O
jointly	O
won	O
the	O
Innovation	O
Prize	O
of	O
Inria	O
–	O
Académie	O
des	O
sciences	O
–	O
Dassault	O
Systèmes	O
for	O
their	O
scientific	O
work	O
that	O
led	O
to	O
the	O
development	O
of	O
the	O
CADP	B-Application
toolbox	O
.	O
</s>
