<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
program	O
analysis	O
is	O
the	O
process	O
of	O
automatically	O
analyzing	O
the	O
behavior	O
of	O
computer	O
programs	O
regarding	O
a	O
property	O
such	O
as	O
correctness	O
,	O
robustness	O
,	O
safety	O
and	O
liveness	O
.	O
</s>
<s>
An	O
optimizer	O
that	O
is	O
expected	O
to	O
complete	O
in	O
a	O
relatively	O
short	O
amount	O
of	O
time	O
,	O
such	O
as	O
the	O
optimizer	O
in	O
an	O
optimizing	B-Application
compiler	I-Application
,	O
may	O
use	O
a	O
truncated	O
version	O
of	O
an	O
analysis	O
that	O
is	O
guaranteed	O
to	O
complete	O
in	O
a	O
finite	O
amount	O
of	O
time	O
,	O
and	O
guaranteed	O
to	O
only	O
find	O
correct	O
optimizations	O
.	O
</s>
<s>
However	O
,	O
there	O
is	O
also	O
a	O
third	O
strategy	O
that	O
is	O
sometimes	O
applicable	O
for	O
languages	O
that	O
are	O
not	O
completely	O
specified	O
,	O
such	O
as	O
C	B-Language
.	O
An	O
optimizing	B-Application
compiler	I-Application
is	O
at	O
liberty	O
to	O
generate	O
code	O
that	O
does	O
anything	O
at	O
runtime	O
even	O
crashes	O
if	O
it	O
encounters	O
source	O
code	O
whose	O
semantics	O
are	O
unspecified	O
by	O
the	O
language	O
standard	O
in	O
use	O
.	O
</s>
<s>
This	O
technique	O
is	O
often	O
used	O
to	O
prevent	O
SQL	B-Language
injection	I-Language
attacks	I-Language
.	O
</s>
<s>
This	O
is	O
done	O
by	O
the	O
compiler	O
or	O
interpreter	B-Application
.	O
</s>
<s>
Automated	O
monitoring	O
of	O
programs	O
is	O
sometimes	O
referred	O
to	O
as	O
runtime	B-Application
verification	I-Application
.	O
</s>
