The Inconsistent Labelling Problem of Stutter-Preserving Partial-Order Reduction

10/22/2019
by   Thomas Neele, et al.
0

In model checking, partial-order reduction (POR) is an effective technique to reduce the size of the state space. Stubborn sets are an established variant of POR and have seen many applications over the past 31 years. One of the early works on stubborn sets shows that a combination of several conditions on the reduction is sufficient to preserve stutter trace equivalence, making stubborn sets suitable for model checking of linear-time properties. In this paper, we identify a flaw in the reasoning and show with a counter-example that stutter trace equivalence is not necessarily preserved. We propose a solution together with an updated correctness proof. Furthermore, we analyse in which formalisms this problem may occur. The impact on practical implementations is limited, since they all compute a correct approximation of the theory.

READ FULL TEXT

page 1

page 2

page 3

page 4

12/31/2020

A Detailed Account of The Inconsistent Labelling Problem of Stutter-Preserving Partial-Order Reduction

One of the most popular state-space reduction techniques for model check...
04/10/2018

POR for Security Protocol Equivalences: Beyond Action-Determinism

Formal methods have proved effective to automatically analyze protocols....
06/27/2011

Theory and Algorithms for Partial Order Based Reduction in Planning

Search is a major technique for planning. It amounts to exploring a stat...
11/09/2021

Stateful Dynamic Partial Order Reduction for Model Checking Event-Driven Applications that Do Not Terminate

Event-driven architectures are broadly used for systems that must respon...
09/03/2019

Value-centric Dynamic Partial Order Reduction

The verification of concurrent programs remains an open challenge, as th...
11/02/2020

Out of Control: Reducing Probabilistic Models by Control-State Elimination

We present a new, simple technique to reduce state space sizes in probab...
05/13/2021

Stateless Model Checking under a Reads-Value-From Equivalence

Stateless model checking (SMC) is one of the standard approaches to the ...