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[Frama-c-discuss] approximations in value analysis

  • Subject: [Frama-c-discuss] approximations in value analysis
  • From: sali.sene at airbus.com (SENE, Sali)
  • Date: Thu, 7 Jul 2011 09:25:02 +0200
Hi all,

I have many approximations in the result of my analysis. Some of this approximations are caused by arithmetic on variable pointer.

Like this:
sources/alloc_new.c:59:[value] reading left-value new.
        It contains a garbled mix of {heap; ioctl_requests; ioctl_args; "DRIVER DSO"; }
        because of Arithmetic {sources/alloc_new.c:56; }.

The line alloc_new.c:56
new->size = (int)next - (int)new - BLOCK_SIZE;

next and new are some variable pointer.

How can I fix this approximation?

Best
S.


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