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[Frama-c-discuss] Feature or bug?

  • Subject: [Frama-c-discuss] Feature or bug?
  • From: jens.gerlach at first.fraunhofer.de (Jens Gerlach)
  • Date: Thu, 5 Nov 2009 19:55:10 +0100
Hi,

in the following example the function foo is called twice by the  
function bar
and in both cases bar does not fulfill foo's precondition "x >= 0" .

----------------

/*@
     requires 0 <= x;
     ensures   0 <= \result;
*/
int foo(int x);

void bar()
{
     foo(-1);
     foo(-1);
}

--------------

However, all provers "proof" that for the second case the precondition  
is fulfilled (see below).
Is this behaviour of Jessie intended? (I am using the Beryllium1  
release on Mac OS X.)

Regards

Jens Gelach


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