Faculty of Information Technology, BUT

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VATA: A Library for Efficient Manipulation of Non-Deterministic Tree Automata

LENGÁL Ondřej, ŠIMÁČEK Jiří and VOJNAR Tomáš. VATA: A Library for Efficient Manipulation of Non-Deterministic Tree Automata. Lecture Notes in Computer Science, vol. 2012, no. 7214, pp. 79-94. ISSN 0302-9743.
Czech title
VATA: Knihovna pro efektivní manipulaci s nedeterministickými stromovými automaty
Type
journal article
Language
english
Authors
Keywords
tree automaton, language inclusion, antichain, simulation, tree automata library
Abstract
In this paper, we present VATA, a versatile and efficient open-source tree automata library applicable, e.g., in formal verification. The library supports both explicit and semi-symbolic encoding of non-deterministic finite tree automata and provides efficient implementation of standard operations on both. The semi-symbolic encoding is intended for tree automata with large alphabets. For storing their transition functions, a newly implemented MTBDD library is used. In order to enable the widest possible range of applications of the library even for the semi-symbolic encoding, we provide both bottom-up and top-down semi-symbolic representations. The library implements several highly optimised reduction algorithms based on downward and upward simulations as well as algorithms for testing automata inclusion based on upward and downward antichains and simulations. We compare the performance of the algorithms on a set of testcases and we also compare the performance of VATA with our previous implementations of tree automata.
Published
2012
Pages
79-94
Journal
Lecture Notes in Computer Science, vol. 2012, no. 7214, ISSN 0302-9743
Book
Proceedings of TACAS'12
Publisher
Springer Verlag
BibTeX
@ARTICLE{FITPUB9844,
   author = "Ond\v{r}ej Leng\'{a}l and Ji\v{r}\'{i} \v{S}im\'{a}\v{c}ek and Tom\'{a}\v{s} Vojnar",
   title = "VATA: A Library for Efficient Manipulation of Non-Deterministic Tree Automata",
   pages = "79--94",
   booktitle = "Proceedings of TACAS'12",
   journal = "Lecture Notes in Computer Science",
   volume = 2012,
   number = 7214,
   year = 2012,
   publisher = "Springer Verlag",
   ISSN = "0302-9743",
   language = "english",
   url = "https://www.fit.vut.cz/research/publication/9844"
}
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