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High-Level Petri Net Model Checking with AlPiNA

100%

Hostettler S. , Marechal A. , Linard A. , Risoldi M. , Buchs D.

2011

tom Vol. 113, nr 3/4

229-264

Although model checking is heavily used in the hardware domain, it did not take off in software engineering yet. One of the possible reasons is that software models are very complex. They integrate many dimensions such as data types and concurrency, leading to the infamous state space explosion problem. This article introduces the Algebraic Petri Nets Analyzer (AlPiNA), a symbolic model checker for High-level Petri nets. It is comprised of two independent modules: a GUI plug-in for Eclipse and an underlying model checking engine. AlPiNA is a step towards performing efficient and user-friendly model checking of large software systems. This is achieved by separating the model and its properties from the optimisation artifacts. This article describes the features that AlPiNA provides to the user for designing models and verifying properties. It also presents the techniques and artifacts used for tuning verification performance, along with some theoretical background.

Causal Semantics of Algebraic Petri Nets distinguishing Concurrency and Synchronicity

100%

Juhás G. , Lorenz R. , Mauser S.

2008

tom Vol. 86, nr 3

255-298

In this paper, we show how to obtain causal semantics distinguishing "earlier than" and "not later than" causality between events from algebraic semantics of Petri nets. Janicki and Koutny introduced so called stratified order structures (so-structures) to describe such causal semantics. To obtain algebraic semantics, we redefine our own algebraic approach generating rewrite terms via partial operations of synchronous composition, concurrent composition and sequential composition. These terms are used to produce so-structures which define causal behavior consistent with the (operational) step semantics. For concrete Petri net classes with causal semantics derived from processes minimal so-structures obtained from rewrite terms coincide with minimal so-structures given by processes. This is demonstrated for elementary nets with inhibitor arcs.