HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation

Efficient On-the-Fly Computation of Weak Tau-Confluence

Radu Mateescu 1, * Anton Wijs 1
* Corresponding author
1 VASY - System validation - Research and applications
Inria Grenoble - Rhône-Alpes, LIG - Laboratoire d'Informatique de Grenoble
Abstract : The notion of tau-confluence provides a form of partial order reduction of Labelled Transition Systems (LTSs), by allowing to identify the tau-transitions whose execution does not alter the observable behaviour of the system. Several forms of tau-confluence adequate with branching bisimulation were studied in the literature, ranging from strong to weak ones according to the length of tau-transition sequences considered. Weak tau-confluence is more complex to compute than strong tau-confluence, but provides better LTS reductions. In this report, we aim at devising an efficient detection of weak tau-confluent transitions during an on-the-fly exploration of LTSs. To this purpose, we define and prove new encodings of several weak tau-confluence variants using alternation-free boolean equation systems (BESs), and we apply efficient local BES resolution algorithms to perform the detection. The resulting reduction module, developed within the CADP toolbox using the generic OPEN/CAESAR environment for LTS exploration, was experimented on numerous examples of large LTSs underlying communication protocols and distributed systems. These experiments assessed the efficiency of the reduction and allowed us to identify the best variants of weak tau-confluence that are useful in practice.
Complete list of metadata

Cited literature [27 references]  Display  Hide  Download

Contributor : Radu Mateescu Connect in order to contact the contributor
Submitted on : Friday, July 24, 2009 - 3:24:35 PM
Last modification on : Friday, February 4, 2022 - 3:24:18 AM
Long-term archiving on: : Tuesday, June 15, 2010 - 9:17:20 PM


Files produced by the author(s)


  • HAL Id : inria-00407381, version 1


Radu Mateescu, Anton Wijs. Efficient On-the-Fly Computation of Weak Tau-Confluence. [Research Report] RR-7000, INRIA. 2009, pp.42. ⟨inria-00407381⟩



Record views


Files downloads