14403: last slicing bug (csmith)
ID0000905: This issue was created automatically from Mantis Issue 905. Further discussion may take place here.
| Id | Project | Category | View | Due Date | Updated |
|---|---|---|---|---|---|
| ID0000905 | Frama-C | Plug-in > slicing | public | 2011-07-31 | 2011-12-19 |
| Reporter | pascal | Assigned To | Anne | Resolution | fixed |
| Priority | normal | Severity | minor | Reproducibility | have not tried |
| Platform | - | OS | - | OS Version | - |
| Product Version | Frama-C GIT, precise the release id | Target Version | - | Fixed in Version | Frama-C Nitrogen-20111001 |
Description :
The value analysis does not find any alarm and finds the values below
~/ppc/bin/toplevel.opt -val-signed-overflow-alarms -no-val-show-progress -cpp-command "gcc -m32 -E -C -I runtime -D__FRAMAC" -no-results -slevel 100000 -machdep x86_32 s.31013054.p.c -val
[value] Called Frama_C_show_each({3781742995}) [value] Called Frama_C_show_each({4095739724}) [value] Called Frama_C_show_each({550094235}) [value] Called Frama_C_show_each({252820852}) [value] Called Frama_C_show_each({624713289}) [value] Called Frama_C_show_each({1426802424}) [value] Called Frama_C_show_each({397183221}) [value] Called Frama_C_show_each({320991826}) [value] Called Frama_C_show_each({1015897994}) [value] Called Frama_C_show_each({3069753974}) [value] Called Frama_C_show_each({4276963908}) [value] Called Frama_C_show_each({1968234281}) [value] Called Frama_C_show_each({1968234281})
Executing (32-bit) finds the same values as above.
But the program sliced with:
~/ppc/bin/toplevel.opt -val-signed-overflow-alarms -no-val-show-progress s.31013054.p.i -slice-calls Frama_C_show_each -slevel 5000 -slevel-function crc32_gentab:0 -then-on 'Slicing export' -print -ocode res.c
$ gcc -m32 res.c show_each.c $ ./a.out [value] Called Frama_C_show_each({3781742995}) [value] Called Frama_C_show_each({4095739724}) [value] Called Frama_C_show_each({550094235}) [value] Called Frama_C_show_each({252820852}) [value] Called Frama_C_show_each({624713289}) [value] Called Frama_C_show_each({1426802424}) [value] Called Frama_C_show_each({397183221}) [value] Called Frama_C_show_each({320991826}) [value] Called Frama_C_show_each({1015897994}) [value] Called Frama_C_show_each({1148365541}) [value] Called Frama_C_show_each({3051573531}) [value] Called Frama_C_show_each({2309422687}) [value] Called Frama_C_show_each({2309422687})
Additional Information :
Le bug a pris 36h * 5 processeurs pour se montrer, ce sera presque sûrement le dernier, sauf si tu en introduis un nouveau en corrigeant celui-ci :)
1015897994 est la dernière valeur correcte. Cela indique une différence dans la valeur finale de g_89[2].