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[Frama-c-discuss] Proof conditions with simple pointer assignment

  • Subject: [Frama-c-discuss] Proof conditions with simple pointer assignment
  • From: dak at (Damien Karkinsky)
  • Date: Fri, 11 Dec 2009 16:44:20 +0000


Consider the following spec,

/*@ requries \valid(p);
   @ assigns *p;
   @ ensures *p == 1;
void f(int *p)
    *p = 1;

This generates the proof condition (in consice terms)
H2:  integer_of_int32(result) = 1
int_P_int_M_p_1_0: int(int_P, int32) memory
H3: int_P_int_M_p_1_0 = store(int_P_int_M_p_1, p, result)
integer_of_int32(select (int_P_int_M_p_1_0, p)) = 1

The conditions is not discharged although axiom select_store_eq seems
quite sufficient to discharge it. Is integer_of_int32 somehow getting in
the way?

Thank you