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The advent of ever more complex reactive systems in increasingly critical areas calls for the development of automated verification techniques. Model checking is one such technique, which has proven quite successful. However, the state-explosion problem remains a major stumbling block. Recent experience indicates that solutions are to be found in the… (More)

We describe a framework for compositional verification of finite-state processes. The framework is based on two ideas: a subset of the logic CTL for which satisfaction is preserved under composition, and a preorder on structures which captures the relation between a component and a system containing the component. Satisfaction of a formula in the logic… (More)

The state explosion problem remains a major hurdle in applying symbolic model checking to large hardware designs. State space abstraction, having been essential for verifying designs of industrial complexity, is typically a manual process, requiring considerable creativity and insight.In this article, we present an automatic iterative abstraction-refinement… (More)

We describe a method for using abstraction to reduce the complexity of temporal-logic model checking. Using techniques similar to those involved in abstract interpretation, we construct an abstract model of a program without ever examining the corresponding unabstracted model. We show how this abstract model can be used to verify properties of the original… (More)

Printing remark: Printing takes a lot of time, sorry for the inconvenience. Abstract This paper presents a scalable method for parallel symbolic reachability analysis on a distributed-memory environment of workstations. Our method makes use of an adaptive partitioning algorithm which achieves high reduction of space requirements. The memory balance is… (More)

This paper presents a procedure for the verification of multi-process systems based on considering a series of underapproximated models. The procedure checks models with an increasing set of allowed interleavings of the given set of processes, starting from a single interleaving. The procedure relies on SAT solvers' ability to produce proofs of… (More)

The goal of this work is to improve the efficiency and effectiveness of the abstraction-refinement framework for CTL over the 3-valued semantics. We start by proposing a symbolic (BDD-based) approach for this framework. Next, we generalize the definition of abstract models in order to provide a monotonic abstraction-refinement framework. To do so, we… (More)

We present a minimization algorithm that receives a Kripke structure <i>M</i> and returns the smallest structure that is simulation equivalent to <i>M</i>. The <i>simulation equivalence</i> relation is weaker than bisimulation but stronger than the simulation preorder. It strongly preserves ACTL and LTL (as sublogics of ACTL*).We show that every structure… (More)