Publication Details
Advanced Ramsey-based Büchi Automata Inclusion Testing
Chen Yu-Fang (ASIN)
Clemente Lorenzo (UEDIN)
Holík Lukáš, doc. Mgr., Ph.D. (DITS FIT BUT)
Hong Chih-Duo (ASIN)
Mayr Richard (UEDIN)
Vojnar Tomáš, prof. Ing., Ph.D. (DITS FIT BUT)
Büchi automata, inclusion checking, Ramsey theorem, simulation relations
Checking language inclusion between two nondeterministic Büchi automata A and B is computationally hard (PSPACE-complete). However, several approaches which are efficient in many practical cases have been proposed. We build on one of these, which is known as the Ramsey-based approach. It has recently been shown that the basic Ramsey-based approach can be drastically optimized by using powerful subsumption techniques, which allow one to prune the search-space when looking for counterexamples to inclusion. While previous works only used subsumption based on set inclusion or forward simulation on A and B, we propose the following new techniques: (1) A larger subsumption relation based on a combination of backward and forward simulations on A and B. (2) A method to additionally use forward simulation between A and B. (3) Abstraction techniques that can speed up the computation and lead to early detection of counterexamples. The new algorithm was implemented and tested on automata derived from real-world model checking benchmarks, and on the Tabakov-Vardi random model, thus showing the usefulness of the proposed techniques.
@TECHREPORT{FITPUB9721,
author = "A. Parosh Abdulla and Yu-Fang Chen and Lorenzo Clemente and Luk\'{a}\v{s} Hol\'{i}k and Chih-Duo Hong and Richard Mayr and Tom\'{a}\v{s} Vojnar",
title = "Advanced Ramsey-based B{\"{u}}chi Automata Inclusion Testing",
pages = 45,
year = 2011,
location = "FIT-TR-2011-03, Brno, CZ",
publisher = "Faculty of Information Technology BUT",
language = "english",
url = "https://www.fit.vut.cz/research/publication/9721"
}