Abstract: As part of our CPS project, we have focused on the problem of model repair for cyber-physical systems. This work involves identifying constraints caused due to physical components during revision. We consider four types of constraints cyber-cyber, cyber-physical, physical-cyber and physical-physical. Based on the complexity limitations caused by these constraints we are developing efficient heuristics to mitigate the cost of model repair. We have also focused on extending revision to code level.

Synopsis: The goal of the High-Assurance Cyber Military Systems (HACMS) program is to create technology for the construction of high-assurance, cyber-physical systems, where high assurance is defined to mean functionally correct and satisfying appropriate safety and security properties. Achieving this goal requires a fundamentally different approach from what the software community has taken to date. HACMS will adopt a clean-slate, formal methods–based approach that enables semi-automated code synthesis from executable, formal specifications.