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I have installed frama-c (18.0) and coqide (8.9) through opam (plus other needed dependencies of course, but that may not be the matter here). Well the point is I simply installed it through opam, not done anything else strange (and I didn't see any particular instruction that I should do otherwise).

Frama-c works as expected when I use Alt-ergo with WP, but if I try to use coq or coqide instead of Alt-ergo, then I get the following error for each goal that Qed does not manage to prove immediately:

[wp] 13 goals scheduled
[wp] [Coq] 'Qed.v' compilation failed.
------------------------------------------------------------
--- Coqc (stderr) :
------------------------------------------------------------
File "/tmp/wp7fe5dc.dir/coqwp/Qed.v", line 27, characters 8-17:
Error:
Cannot find a physical path bound to logical path matching suffix bool.

------------------------------------------------------------
[wp] [Coq] Goal typed_nondet_loop_inv_preserved : Failed
  Compilation of 'Qed.v' failed.

As a note, before displaying the error, it manages to compile some other .v files. I have tried to open manually the files in coqide, and I get the same result. For the record, here are the lines coq complains about:

Require bool.Bool.
Require int.Int.
Require int.Abs.
Require int.ComputerDivision.
Require real.Real.
Require real.RealInfix.
Require real.FromInt.

I have also tried to downgrade coq a bit, but not lower than 8.7 (as otherwise opam complains of incompatible base installation package and I don't really want to screw up my installation), and got the same result.

If someone would have an idea of what is causing that and how I can get to set it up that correctly, that'd be nice. Even if for what I'm doing with it for now, Alt-ergo is sufficient, I would have liked to play a bit with coq to see how it can be used.

Regards,

--

Vincent Penelle.

Vincent Penelle
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1 Answers1

2

First, indeed you need coq < 8.8 (e.g. 8.7.2) if you want to use it with Frama-C/WP, as newer versions are not supported for the moment.

Second, the order in which you have installed your packages is relevant. In particular, if the appropriate version of coq has been installed after frama-c, WP did not compile and install its coq libraries, which are the ones that are missing here. Thus, you may want to do opam reinstall frama-c to compile the package against a compatible coq version.

Virgile
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  • Hi, Many thanks for the answer. It was indeed that. And sorry for the silly question by the way, I thought I had tried that, it seems I forgot to recompile frama-c afterwards. Regards, – Vincent Penelle Mar 09 '19 at 18:08
  • Glad to have helped. Your question was not silly (I upvoted it ): WP could at the very least provide a more helpful error message (e.g. a warning about missing Coq libraries) in cases like that, and `frama-c`'s `opam` package could refine a bit its optional dependencies. – Virgile Mar 10 '19 at 19:13