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[Frama-c-discuss] existential variables in ACSL spec in Frama-C/WP Sodium

  • Subject: [Frama-c-discuss] existential variables in ACSL spec in Frama-C/WP Sodium
  • From: junkil.park at cis.upenn.edu (Junkil (David) Park)
  • Date: Sun, 29 Mar 2015 21:06:46 -0400
Hi,

There seems to be something wrong with Frama-C/WP (Sodium) with 5 or more
existential variables in the specification.

// dummy.c
void dummy()
{
double d = 7;
//@ assert \exists real r1, r2, r3, r4, r5; d == r1 + r2 + r3 + r4 + r5;
}

> frama-c -wp dummy.c
[kernel] Parsing FRAMAC_SHARE/libc/__fc_builtin_for_normalization.i (no
preprocessing)
[kernel] Parsing dummy.c (with preprocessing)
[wp] Running WP plugin...
[wp] Collecting axiomatic usage
[wp] warning: Missing RTE guards
[wp] 1 goal scheduled
[wp] Proved goals:    0 / 1

In the example above, Frama-C/WP doesn't try to prove it.

In addition, for the command below, it generate nothing.
> frama-c -wp -wp-prover why3 -wp-gen -wp-out dummy dummy.c

With 4 existential variables instead of 5, Frama-C/WP works fine.


Am I missing something? Or, is it an issue of the new version of Frama-C?

Thanks,
Junkil
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