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| ID | Project | Category | View Status | Date Submitted | Last Update |
| 0000905 | Frama-C | Plug-in > slicing | public | 2011-07-31 12:59 | 2011-12-19 10:04 |
|
| Reporter | pascal | |
| Assigned To | Anne | |
| Priority | normal | Severity | minor | Reproducibility | have not tried |
| Status | closed | Resolution | fixed | |
| Platform | | OS | | OS Version | |
| Product Version | Frama-C GIT, precise the release id | |
| Target Version | | Fixed in Version | Frama-C Nitrogen-20111001 | |
|
| Summary | 0000905: 14403: last slicing bug (csmith) |
| 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]. |
| Tags | No tags attached. |
|
| Attached Files |  p.tgz [^] (71,831 bytes) 2011-07-31 12:59 |
|
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