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[Frama-c-discuss] Average Problem

  • Subject: [Frama-c-discuss] Average Problem
  • From: sdavrieux at gmail.com (Sebastian)
  • Date: Mon, 29 Sep 2014 10:00:36 +0200
  • In-reply-to: <54291115.1080500@gmail.com>
  • References: <54291115.1080500@gmail.com>
Good morning,
     I'm trying to do the average without overflow, however I'm not able 
to check an assert that contains \sum annotation.
So I decided to make a simpler function that only uses \sum, but it 
doesn't work. What can I do to solve the problem?

Best regards,
Sebastian
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/*@
	requires length > 2;
  requires \valid(a + (0 .. length - 1)); 
  requires \valid_read(a + (0 .. length - 1));
	requires \sum(0, length - 1, \lambda integer k; a[k]) == 6U;
*/
void foo (unsigned int* a, unsigned int length) {
	/*@
		assert \sum(0, length - 1, \lambda integer k; a[k]) == 6U;
	*/
	return;
}