Formal Verification of Concurrent Embedded Software

Automotive software is mainly concerned with safety critical systems and the functional correctness of the software is very important. Thus static software analysis, being able to detect runtime errors in software, has become a standard in the automotive domain. The most critical runtime error is one which only occurs sporadically and is therefore very difficult to detect and reproduce. A reason for such an error is e. g., a race condition. The introduction of multicore hardware enables an execution of the software in real parallel. Hence, the risk of critical race conditions increases. This thesis introduces the MEMICS software verification approach. In order to produce precise results, MEMICS works based on the formal verification technique, bounded model checking. The internal model is able to represent an entire automotive control unit, including the hardware configuration as well as real-time operating systems like AUTOSAR and OSEK. The proof engine used to check the model is a newly developed interval constraint solver with an embedded memory model. MEMICS is able to detect common runtime errors, like e. g., a division by zero, as well as concurrent ones, like e. g., a critical race condition.


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