Abstract
Dynamic Pushdown Networks (DPNs) are a model for parallel programs with (recursive) procedures and dynamic process creation. Constraints on the sequences of spawned processes allow to extend the basic model with joining of created processes [2]. Orthogonally DPNs can be extended with nested locking [9]. Reachability of a regular set R of configurations in presence of stable constraints as well as reachability without constraints but with nested locking are based on computing the set of predecessors pre *(R). In the present paper, we present a forward-propagating algorithm for deciding reachability for DPNs. We represent sets of executions by sets of execution trees and show that the set of all execution trees resulting in configurations from R which either allow a lock-sensitive execution or a join-sensitive execution, is regular. Here, we rely on basic results about macro tree transducers. As a second contribution, we show that reachability is decidable also for DPNs with both nested locking and joins.
This work was partially funded by the DFG project OpIAT (MU 1508/1-1 and SE 551/13-1) and the ANR project ASOPT.
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Gawlitza, T.M., Lammich, P., Müller-Olm, M., Seidl, H., Wenner, A. (2011). Join-Lock-Sensitive Forward Reachability Analysis for Concurrent Programs with Dynamic Process Creation. In: Jhala, R., Schmidt, D. (eds) Verification, Model Checking, and Abstract Interpretation. VMCAI 2011. Lecture Notes in Computer Science, vol 6538. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-18275-4_15
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