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  • #643
Closed
Open
Created Dec 01, 2014 by Jochen Burghardt@burghardt

insufficient preconditions given to verify constructor call from global variable initialization

ID0002003: This issue was created automatically from Mantis Issue 2003. Further discussion may take place here.


Id Project Category View Due Date Updated
ID0002003 Frama-Clang Plug-in > clang public 2014-12-01 2015-05-04
Reporter Jochen Assigned To virgile Resolution open
Priority normal Severity minor Reproducibility always
Platform frama-c-Neon-20140301+dev-stance OS - OS Version xubuntu-cfe13.10
Product Version - Target Version - Fixed in Version -

Description :

The predonditions of the cls() constructor aren't verified for the call originating from the declaration in line 9. The goal in the .mlw file is just "forall i : int. is_sint32(i) -> (0 <> i)", i.e. the fact that i (that is x in the C++ source) has the value 2 isn't given as precondition.

In contrast, when cls() is called explicitly in main(), the actual value of x is given - the .mlw file's goal for line 13 reads: "... -> (0 <> (safe_comp_div(1, 2)))". Note that here the effect of the line-9 cls()-call is ignored in x-value computation; in fact, already the cls()-call in line 12 will crash with zero-divide.

This issues is probably closely related to #2002.

Attachments

  • 178.cpp
  • 476.cpp
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