The benefits of relaxing punctuality
Rajeev Alur, Tomás Feder, Thomas A. Henzinger · Journal of the ACM · 1991
The most natural, compositional, way of modeling real-time systems uses a dense domain for time.The satistiability of timing constraints that are capable of expressing punctuality in this model, however, is known to be undecidable.We introduce a temporal language that can constrain the time difference between events only with finite, yet arbitrary, precision and show the resulting logic to be EXPSPACE-complete.This result allows us to develop an algorithm for the verification of timing properties of real-time systems with a dense semantics.