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[Frama-c-discuss] Can i specify/proove a function to be "just called"?

  • Subject: [Frama-c-discuss] Can i specify/proove a function to be "just called"?
  • From: ds.verification at (ds.verification at
  • Date: Tue, 14 Jan 2014 12:38:19 +0100 (CET)

Hello everybody,

i have browsed the ACSL reference manual in search for a predicate or other
gear to express and prove whether some function is called by some other
So, the idea is that for the function being called that its call has no
(visible-to-Frama-C) effect but i only need to ensure it is called: The
function is "trustable" and has side effects which are out of scope of the

I thought of something like:

/* Does some magic (e.g. external assembly module), but has no contract
 * its own
extern void foo(int val);

int counter = 0;

/* @ensures \called(foo(\old(counter)));
   @ensures \counter=\old(counter)+1;
void test1()

Is this possible in ACSL?

Thanks in advance