@inproceedings{4603,
  abstract     = {Alternating transition systems are a general model for composite systems which allow the study of collaborative as well as adversarial relationships between individual system components. Unlike in labeled transition systems, where each transition corresponds to a possible step of the system (which may involve some or all components), in alternating transition systems, each transition corresponds to a possible move in a game between the components. In this paper, we study refinement relations between alternating transition systems, such as “Does the implementation refine the set A of specification components without constraining the components not in A?” In particular, we generalize the definitions of the simulation and trace containment preorders from labeled transition systems to alternating transition systems. The generalizations are called alternating simulation and alternating trace containment. Unlike existing refinement relations, they allow the refinement of individual components within the context of a composite system description. We show that, like ordinary simulation, alternating simulation can be checked in polynomial time using a fixpoint computation algorithm. While ordinary trace containment is PSPACE-complete, we establish alternating trace containment to be EXPTIME-complete. Finally, we present logical characterizations for the two preorders in terms of ATL, a temporal logic capable of referring to games between system components.},
  author       = {Alur, Rajeev and Henzinger, Thomas A and Kupferman, Orna and Vardi, Moshe},
  booktitle    = {Proceedings of the 9th Interantional Conference on Concurrency Theory},
  isbn         = {978-3-540-64896-3},
  location     = {Nice, France},
  pages        = {163 -- 178},
  publisher    = {Schloss Dagstuhl - Leibniz-Zentrum für Informatik},
  title        = {{Alternating refinement relations}},
  doi          = {10.1007/BFb0055622},
  volume       = {1466},
  year         = {1998},
}

@inproceedings{4515,
  abstract     = {We summarize and reorganize some of the last decade's research on real-time extensions of temporal logic. Our main focus is on tableau constructions for model checking linear temporal formulas with timing constraints. In particular, we find that a great deal of real-time verification can be performed in polynomial space, but also that considerable care must be exercised in order to keep the real-time verification problem in polynomial space, or even decidable.},
  author       = {Henzinger, Thomas A},
  booktitle    = {Proceedings of the 9th Interantional Conference on Concurrency Theory},
  isbn         = {978-3-540-64896-3},
  location     = {Nice, France},
  pages        = {439 -- 454},
  publisher    = {Schloss Dagstuhl - Leibniz-Zentrum für Informatik},
  title        = {{It's about time: Real-time logics reviewed}},
  doi          = {10.1007/BFb0055640},
  volume       = {1466},
  year         = {1998},
}