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[Frama-c-discuss] Small function on buffer doesn't verify

Julien Signoles wrote:
> Boris Hollas a ?crit :
>> On Mon, 2010-05-17 at 14:59 +0200, Julien Signoles wrote:
>>
>>> It works if you insert a space between .. and BUFF_SIZE like this:
>>>
>>>     /*@ requires \valid(msg+(0.. BUFF_SIZE));
>>>
>>
>> Jessie is still unable to verify the postcondition in my example. The
>> relevant VC is integer_of_int8(select(char_P_char_M_msg_1_1, shift(msg,
>> 4))) = 0.
>> I use the Beryllium2 distribution.
>
> Which provers do you use? I test Alt-Ergo, Simplify and Z3. The first 
> tool is still unable to verify the postcondition. But the two other 
> tools do the job. Combining several provers is often useful.
>
> -- 
> Julien
>
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And for me, with Boron+Why 2.26, it is 100% proved by any prover below

Alt-Ergo 0.91
Simplify 1.5.4
Z3 2.2
Yices 1.0.24
CVC3 2.2

- Claude

-- 
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