<s>
CPAchecker	B-Language
is	O
a	O
framework	O
and	O
tool	O
for	O
formal	O
software	O
verification	O
,	O
and	O
program	O
analysis	O
,	O
of	O
C	B-Language
programs	I-Language
.	O
</s>
<s>
Some	O
of	O
its	O
ideas	O
and	O
concepts	O
,	O
for	O
example	O
lazy	O
abstraction	O
,	O
were	O
inherited	O
from	O
the	B-Application
software	I-Application
model	I-Application
checker	I-Application
BLAST	I-Application
.	O
</s>
<s>
which	O
is	O
a	O
concept	O
that	O
allows	O
expression	O
of	O
both	O
model	B-Application
checking	I-Application
and	O
program	O
analysis	O
with	O
one	O
formalism	O
.	O
</s>
<s>
When	O
executed	O
,	O
CPAchecker	B-Language
performs	O
a	O
reachability	O
analysis	O
,	O
i.e.	O
,	O
it	O
checks	O
whether	O
a	O
certain	O
state	O
,	O
which	O
violates	O
a	O
given	O
specification	O
,	O
can	O
potentially	O
be	O
reached	O
.	O
</s>
<s>
One	O
application	O
of	O
CPAchecker	B-Language
is	O
the	O
verification	O
of	O
Linux	B-Application
device	I-Application
drivers	I-Application
.	O
</s>
<s>
CPAchecker	B-Language
came	O
first	O
in	O
two	O
categories	O
(	O
Overall	O
and	O
ControlFlowInteger	O
)	O
in	O
the	O
1st	O
Competition	O
on	O
Software	O
Verification	O
(	O
2012	O
)	O
that	O
was	O
held	O
at	O
TACAS	O
2012	O
in	O
Tallinn	O
.	O
</s>
<s>
CPAchecker	B-Language
came	O
first	O
(	O
category	O
Overall	O
)	O
in	O
the	O
2nd	O
Competition	O
on	O
Software	O
Verification	O
(	O
2013	O
)	O
that	O
was	O
held	O
at	O
TACAS	O
2013	O
in	O
Rome	O
.	O
</s>
<s>
CPAchecker	B-Language
operates	O
on	O
a	O
control-flow	O
automaton	O
(	O
CFA	O
)	O
;	O
before	O
a	O
given	O
C	B-Language
program	I-Language
can	O
be	O
analyzed	O
by	O
the	O
CPA	O
algorithm	O
,	O
it	O
gets	O
transformed	O
into	O
a	O
CFA	O
.	O
</s>
