posted on 2019-06-10, 15:20authored byRupak Majumdar, Nir Piterman, Anne-Kathrin Schmuck
Many problems in reactive synthesis are stated using two formulas—an environment assumption and a system guarantee—and ask for an implementation that satisfies the guarantee in environments that satisfy their assumption. Reactive synthesis tools often produce strategies that formally satisfy such specifications by actively preventing an environment assumption from holding. While formally correct, such strategies do not capture the intention of the designer. We introduce an additional requirement in reactive synthesis, non-conflictingness, which asks that a system strategy should always allow the environment to fulfill its liveness requirements. We give an algorithm for solving GR(1) synthesis that produces non-conflicting strategies. Our algorithm is given by a 4-nested fixed point in the µ-calculus, in contrast to the usual 3-nested fixed point for GR(1). Our algorithm ensures that, in every environment that satisfies its assumptions on its own, traces of the resulting implementation satisfy both the assumptions and the guarantees. In addition, the asymptotic complexity of our algorithm is the same as that of the usual GR(1) solution. We have implemented our algorithm and show how its performance compares to the usual GR(1) synthesis algorithm.
Funding
N. Piterman—Supported by project “d-SynMA” that is funded by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 772459).
History
Citation
Lecture Notes in Computer Science (LNCS), 2019, 11428 , pp. 229-246
Author affiliation
/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Informatics
Source
International Conference on Tools and Algorithms for the Construction and Analysis of Systems TACAS 2019