Symbolic Model Checking of Real-Time Systems

We present a new real-time temporal logic for the specification and verification of discrete quantitative temporal properties. This logic is an extension of the well-known logic CTL. Its semantics is defined on discrete time transition systems which are in turn interpreted in an abstract manner instead of the usual stuttering interpretation. Hence, our approach directly supports abstractions of real-time systems by ignoring irrelevant qualitative properties, but without loosing any quantitative information. We analyse the complexity of the presented model checking algorithm and furthermore present a fragment of the logic that can be effi-