WCET overapproximation for software in the context of a Cyber-Physical System

We propose an approach for overapproximating the Worst-Case Execution Time (WCET) of embedded control software using formal methods. Model checking is iteratively applied to compute the WCET from the machine code of the software considering a platform and an environment model. We implemented the approach and present first experiments for a thermal controller application executed on a LEON3 processor under different environment constraints.