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[Frama-c-discuss] A small plugin to specific which coq strategy to use per block annotation

  • Subject: [Frama-c-discuss] A small plugin to specific which coq strategy to use per block annotation
  • From: Pierre-Loic.Garoche at onera.fr (Pierre-Loïc Garoche)
  • Date: Tue, 12 Mar 2013 17:23:41 +0100
Hi everybody,

I just committed a plugin that allows to specify for code annotations (spec of blocks) which coq strategy to apply. I hope it can be useful for some of you.

Strategies should be declared as ACSL terms and you should declare the predicate use_strategy:

/*@ axiomatic ellipsoids_proof_tactics {
  @   type ellipsoids_tactics = Intuition | Tactic2;
  @   predicate use_strategy (ellipsoids_tactics t);
  @ }
*/

Then each block specification can use the following grammar extension:

/*@ requires x < 0;
  @ ensures \result <= 0; 
*/
int plus_one (int x) {
int y,z;
/*@ ensures y <= 0; 
  @ PROOF_TACTIC (use_strategy (Intuition));
*/
{
y = x + 1;
}
/*@ ensures z <= 0; 
  @ PROOF_TACTIC (use_strategy (Tactic2));
*/
{
z = 2 * y;
}
return z;
}


The plugin will call WP on each of those block annotations and update the default coq strategy with the specified proof tactic.

URL: https://github.com/ploc/wp-local-tactic

For the moment only block specification are concerned and *not* function specifications.


Cheers

pl
-- 
Pierre-Lo?c Garoche
Research Scientist @ ONERA
pierre-loic.garoche at onera.fr - pierre-loic-garoche at uiowa.edu
http://www.onera.fr/staff/pierre-loic-garoche/
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