frama-c/wp generates invalid why3

ID0002471: This issue was created automatically from Mantis Issue 2471. Further discussion may take place here.

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Id	Project	Category	View	Due Date	Updated
ID0002471	Frama-C	Plug-in > wp	public	2019-08-13	2020-02-17

Reporter	abakst	Assigned To	correnson	Resolution	fixed
Priority	normal	Severity	major	Reproducibility	always
Platform	-	OS	macOS	OS Version	10.14
Product Version	Frama-C 19-Potassium	Target Version	-	Fixed in Version	Frama-C 20-Calcium

Description :

There appears to be an issue with some of the why3 files that get generated from user axiomatic definitions. I've installed frama-c using the nix-pkgs on the master branch, and hence have version 19.0, and why3 version 1.2.0.

/*@ axiomatic maps { type model_digit = octet | sextet; 
                     logic integer foo(model_digit i);
                   }
*/
int foo() {
//@assert \forall int i;  i == foo(octet);
  return 0;
}

Given the (silly) program above in simple.c, I get the following behavior

$ frama-c -wp -wp-prover z3-ce simple.c
[kernel] Parsing simple.c (with preprocessing)
[wp] Warning: Missing RTE guards
[wp] 1 goal scheduled
[wp] WPOUT/typed/A_maps.why:13: User Error: why3 syntax error
[wp] [z3-ce] Goal typed_foo_assert : Failed
  why3 syntax error
[wp] Proved goals:    0 / 1
  Why3 (z3-ce):    0  (failed: 1)
[wp] User Error: Deferred error message was emitted during execution. See above messages for more information.
[kernel] Plug-in wp aborted: invalid user input.

The A_maps.why file contains:

(* ---------------------------------------------------------- *)
(* --- Axiomatic 'maps'                                   --- *)
(* ---------------------------------------------------------- *)
theory A_maps

use bool.Bool
use int.Int
use int.ComputerDivision
use real.RealInfix
use Qed.Qed
use int.Abs as IAbs
use map.Map
type a_model_digit | c_octet | c_sextet

function l_foo a_model_digit : int

end

The error seems to be on the line (I'd imagine there should be an '=' but I am not a why3 user)

type a_model_digit | c_octet | c_sextet

Steps To Reproduce :

Copy the C source into a new file, simple.c, and attempt to run the command:

frama-c -wp -wp-prover z3-ce simple.c

Attachments

• bug.c