The satisfiability problems for and are known to be EXPTIME-complete, resp. 2EXPTIME-complete (Fischer and Ladner (1979), Vardi and Stockmeyer (1985)). For fragments that use less temporal or propositional operators, the complexity may decrease. This paper undertakes a systematic study of satisfiability for -and -formulae over restricted sets of propositional and temporal operators. We show that restricting the temporal operators yields satisfiability problems complete for 2EXPTIME, EXPTIME, PSPACE, and NP. Restricting the propositional operators either does not change the complexity (as determined by the temporal operators), or yields very low complexity like NC1, TC0, or NLOGTIME.
The Complexity of Satisfiability for Fragments of CTL and CTL*
A. Meier,Michael Thomas,H. Vollmer,M. Mundhenk
Published 2008 in International Journal of Foundations of Computer Science
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- Publication year
2008
- Venue
International Journal of Foundations of Computer Science
- Publication date
2008-12-01
- Fields of study
Mathematics, Computer Science
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