Survivability Evaluation of Fluid Critical Infrastructures Using Hybrid Petri Nets

In this paper we propose a formal, model-checking based procedure to evaluate the survivability of fluid critical infrastructures. To do so, we introduce the Stochastic Time Logic (STL), which allows to precisely express intricate state-based and until-based properties for an important class of hybrid Petri nets. We present an efficient model checking procedure which recursively traverses the underlying state-space of the hybrid Petri net model, and identifies those regions (subsets of the discrete-continuous state space) that satisfy STL formulae. A case study studying the survivability of a water refinery and distribution plant shows the feasibility of our approach.