Automatic abstraction refinement of TR for PDR

2016 ◽  
Author(s):  
Kuan Fan ◽  
Ming-Jen Yang ◽  
Chung-Yang Huang
Keyword(s):  
Abstraction Refinement ◽  
Automatic Abstraction

CONTROLLABILITY AND COOPERATIVENESS ANALYSIS FOR AUTOMATIC ABSTRACTION REFINEMENT

2006 ◽  
Vol 17 (04) ◽  
pp. 763-774
Author(s):  
FREDDY Y. C. MANG ◽  
PEI-HSIN HO
Keyword(s):  
Real World ◽  
Reachability Analysis ◽  
Experimental Results ◽  
The Other ◽  
Formal Property ◽  
Abstract Model ◽  
Abstraction Refinement ◽  
Automatic Abstraction ◽  
Property Verification ◽  
Refinement Algorithm

We present a new abstraction refinement algorithm to better refine the abstract model for formal property verification. In previous work, refinements are selected either based on a set of counter examples of the current abstract model, as in [5, 6, 7, 8, 9, 20, 21], or independent of any counter examples, as in [18]. We (1) introduce a new controllability analysis that is independent of any particular counter examples, (2) apply a new cooperativeness analysis that extracts information from a particular set of counter examples and (3) combine both to better refine the abstract model. We implemented the algorithm and applied it to verify several real-world designs and properties. We compared the algorithm against the abstraction refinement algorithms in [20] and [21] and the interpolation-based reachability analysis in [15]. The experimental results indicate that the new algorithm outperforms the other three algorithms in terms of runtime, abstraction efficiency (as defined in [20]) and the number of proven properties.

scholarly journals Configurable verification of timed automata with discrete variables

2020 ◽  
Author(s):  
Tamás Tóth ◽  
István Majzik
Keyword(s):  
Timed Automata ◽  
Empirical Evaluation ◽  
Real Time Systems ◽  
Discrete Variables ◽  
Reachability Problem ◽  
Abstraction Refinement ◽  
Dependent Behavior ◽  
Wide Range ◽  
Time Systems ◽  
Lazy Abstraction

AbstractAlgorithms and protocols with time dependent behavior are often specified formally using timed automata. For practical real-time systems, besides real-valued clock variables, these specifications typically contain discrete data variables with nontrivial data flow. In this paper, we propose a configurable lazy abstraction framework for the location reachability problem of timed automata that potentially contain discrete variables. Moreover, based on our previous work, we uniformly formalize in our framework several abstraction refinement strategies for both clock and discrete variables that can be freely combined, resulting in many distinct algorithm configurations. Besides the proposed refinement strategies, the configurability of the framework allows the integration of existing efficient lazy abstraction algorithms for clock variables based on $${\textit{LU}}$$ LU -bounds. We demonstrate the applicability of the framework and the proposed refinement strategies by an empirical evaluation on a wide range of timed automata models, including ones that contain discrete variables or diagonal constraints.

Sign in / Sign up

Export Citation Format

Share Document