ID0002234: **This issue was created automatically from Mantis Issue 2234. Further discussion may take place here.** --- | **Id** | **Project** | **Category** | **View** | **Due Date** | **Updated** | | --- | --- | --- | --- | --- | --- | | ID0002234 | Frama-C | Plug-in > wp | public | 2016-06-21 | 2016-06-21 | | | | | | | | | --- | --- | --- | --- | --- | --- | | **Reporter** | jrobbins | **Assigned To** | correnson | **Resolution** | open | | **Priority** | normal | **Severity** | major | **Reproducibility** | always | | **Platform** | - | **OS** | - | **OS Version** | - | | **Product Version** | Frama-C Aluminium | **Target Version** | - | **Fixed in Version** | - | ### Description : Pointers that are \valid lose their status as \valid if there is code below it that assigns to a pointer. This only seems to happen when the pointer in question is wrapped in a struct. ### Additional Information : Tested on Aluminum on a Linux machine. ### Steps To Reproduce : == file bug.c: struct s { int* ptr; }; /*@ requires \valid(t.ptr); @*/ void foo(struct s t) { //@ assert \valid(t.ptr); int a; int* x = &a; } == Run command: frama-c bug.c -wp == Output: [kernel] Parsing FRAMAC_SHARE/libc/__fc_builtin_for_normalization.i (no preprocessing) [kernel] Parsing bug.c (with preprocessing) [wp] warning: Missing RTE guards [wp] 1 goal scheduled [wp] [Alt-Ergo] Goal typed_foo_assert : Unknown (51ms) [wp] Proved goals: 0 / 1 Alt-Ergo: 0 (unknown: 1) == File fixed.c: struct s { int* ptr; }; /*@ requires \valid(t.ptr); @*/ void foo(struct s t) { //@ assert \valid(t.ptr); int a; int* x; // = &a; } == Run command: frama-c bug.c -wp == Output: [kernel] Parsing FRAMAC_SHARE/libc/__fc_builtin_for_normalization.i (no preprocessing) [kernel] Parsing bug.c (with preprocessing) [wp] warning: Missing RTE guards [wp] 1 goal scheduled [wp] Proved goals: 1 / 1 Qed: 1