Abstract
AbstractFormal Methods comprises of mathematical representation of an embedded system and its system requirements or its corresponding software High Level Requirements (HLRs) and /or software Low Level Requirements (LLRs). When a system and its requirements which dictate its behavior or performance characteristics are expressed as mathematical entities by different mathematical formalisms, it makes a case for carrying out Formal Analysis and Formal Verification of the system to confirm that it behaves as it is expected under all possible scenarios of its execution, for all times. In other words, such formal techniques guarantee absence of errors in the system behavior every time it is made to execute, unlike testing which only exposes presence of defects and not its absence. In this paper we have presented the set of Proof OF Concept Exercises we have carried out on Formal Verification of Avionics Systems, for compliance with DO 178C/DO 333 objectives. Also, this paper talks about the few challenges encountered for the application of Formal Methods in real projects
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