array access in "decreases"-clause causes "Unexpected internal region in logic"
ID0000846:
**This issue was created automatically from Mantis Issue 846. Further discussion may take place here.**
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| **Id** | **Project** | **Category** | **View** | **Due Date** | **Updated** |
| --- | --- | --- | --- | --- | --- |
| ID0000846 | Frama-C | Plug-in > jessie | public | 2011-05-30 | 2011-05-30 |
| | | | | | |
| --- | --- | --- | --- | --- | --- |
| **Reporter** | Jochen | **Assigned To** | cmarche | **Resolution** | open |
| **Priority** | normal | **Severity** | minor | **Reproducibility** | always |
| **Platform** | - | **OS** | - | **OS Version** | - |
| **Product Version** | Frama-C Carbon-20110201 | **Target Version** | - | **Fixed in Version** | - |
### Description :
Jessie reports an uncaught exception: Failure("Unexpected internal region in logic") on the attached file. That message vanishes if either
- the array access "b[f]" in line 4 is replaced e.g. by "0",
- the "decreases" clause in line 8 is deleted, or
- the recursive call in line 11 is deleted.
(The code is nonsensical, but has been boiled down from a reasonable program.)
## Attachments
- [ftest.c](/uploads/9f30f7973db62f3510ab1bdb277ee75a/ftest.c)
issue