Measurement and Metrics Testing - Fuzz testing is an indispensable test-generation tool in software security. Fuzz testing uses automated directed randomness to explore a variety of execution paths in software, trying to expose defects such as buffer overflows. Since cyber-physical systems (CPS) are often safety-critical, testing models of CPS can also expose faults. However, while existing coverage-guided fuzz testing methods are effective for software, results can be disappointing when applied to CPS, where systems have continuous states and inputs are applied at different points in time.