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[Frama-c-discuss] Jessie - behavior

Hello,

There is no way in your code to know that value may be different from
zero at the point of the division (i.e. when status is TRUE at the
beginning of the function); this explains why the prover cannot prove
this. Your code is correct only if you assume that value is different
from zero at the beginning of the function, so you have to add a
precondition like the following one:

/*@ requires value != 0; */

Matthieu

Rovedy Aparecida Busquim e Silva <rovedy at ig.com.br> writes:

> Hi,
>
> Thank for your correction about the line @ requires (status == TRUE) ||
> (status == FALSE).
> I  corrected it.
>
> About the caracter @, the error was only in the email. The space is because
> I have changed the blocks of annotations to test them
> and I forgot to fix in the email. Sorry.
>
> Now, I am sending the 3 screens that are associated with the mencioned
> problem:
> - Screen1 without annotation
> - Screen2 with the short annotation
> - Screen3 with the complete annotation.
>
> Could you help me to understand this question?
>
> Thansk a lot,
> Rovedy
>
>
> 2013/2/22 Pascal Cuoq <pascal.cuoq at gmail.com>
>
>> On Fri, Feb 22, 2013 at 10:09 PM, Rovedy Aparecida Busquim e Silva
>> <rovedy at ig.com.br> wrote:
>>
>> > /* @ requires status == TRUE || FALSE;
>> > ...
>>
>> This is not how you express that status is either TRUE or FALSE in ACSL.
>> Write it as you would in C, status == TRUE || status == FALSE.
>>
>> Besides, you left a space between the '*' character and the '@' character.
>> This causes the entire annotation to be ignored.
>>
>> Pascal
>>
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