A Saturation Method for Collapsible Pushdown Systems
- Cite this paper as:
- Broadbent C., Carayol A., Hague M., Serre O. (2012) A Saturation Method for Collapsible Pushdown Systems. In: Czumaj A., Mehlhorn K., Pitts A., Wattenhofer R. (eds) Automata, Languages, and Programming. ICALP 2012. Lecture Notes in Computer Science, vol 7392. Springer, Berlin, Heidelberg
We introduce a natural extension of collapsible pushdown systems called annotated pushdown systems that replaces collapse links with stack annotations. We believe this new model has many advantages. We present a saturation method for global backwards reachability analysis of these models that can also be used to analyse collapsible pushdown systems. Beginning with an automaton representing a set of configurations, we build an automaton accepting all configurations that can reach this set. We also improve upon previous saturation techniques for higher-order pushdown systems by significantly reducing the size of the automaton constructed and simplifying the algorithm and proofs.
Unable to display preview. Download preview PDF.