Thisvolumecontainsthepapersofthe20thInternationalConferenceonRewr- ing Techniques and Applications (RTA 2009), which was held from June 29 to July 1, 2009, in Bras ́ ?lia, Brazil as part of the 5th International Conference on Rewriting, Deduction, and Programming (RDP 2009) together with the Int- national Conference on Typed Lambda Calculi and Applications (TLCA 2009), the International School on Rewriting (ISR 2009), the 4th Workshop on Logical and Semantic Frameworks with Applications (LSFA 2009), the 10th Inter- tional Workshop on Rule-Based Programming (RULE 2009), the 8th Inter- tional Workshop on Functional and (Constraint) Logic Programming (WFLP 2009), the 9th International Workshop on Reduction Strategies in Rewriting and Programming (WRS 2009), and the annual meeting of the IFIP Working Group 1.6 on term rewriting. RTA is the major forum for the presentation of research on all aspects of rewriting.PreviousRTAconferenceswereheldinDijon(1985), Bordeaux(1987), Chapel Hill (1989), Como (1991), Montreal (1993), Kaiserslautern (1995), R- gers (1996), Sitges (1997), Tsukuba (1998), Trento (1999), Norwich (2000), Utrecht(2001), Copenhagen(2002), Valencia(2003), Aachen(2004), Nara(2005), Seattle (2006), Paris (2007), and Hagenberg (2008).
This book constitutes the refereed proceedings of the 13th International Conference on Computer Aided Verification, CAV 2001, held in Paris, France in July 2001. The 33 revised full papers presented were carefully reviewed and selected from 106 regular paper submissions; also included are 13 reviewed tool presentations selected from 27 submissions. The book offers topical sections on model checking and theorem proving, automata techniques, verification core technology, BDD and decision trees, abstraction and refinement, combinations, infinite state systems, temporal logics and verification, microprocessor verification and cache coherence, SAT and applications, and timed automata.