DAG Inlining: A Decision Procedure for Reachability-Modulo-Theories in Hierarchical Programs
A hierarchical program is one with multiple procedures but no loops or recursion. This paper studies the problem of deciding reachability queries in hierarchical programs. This problem is fundamental to verification and most directly applicable to doing bounded reachability in programs, i.e., reachability under a bound on the number of loop iterations and recursive calls.
The usual method of deciding reachability in hierarchical programs is to first inline all procedures and then do reachability on the resulting single-procedure program. Such inlining unfolds the call graph of the program to a tree and may lead to an exponential increase in the size of the program. We design and evaluate a method called DAG inlining that unfolds the call graph to a DAG instead of a tree by sharing the bodies of procedures at certain points during inlining. DAG inlining can produce much more compact representations than tree inlining. Empirically, we show that it leads to significant improvements in a state-of-the-art verifier.
Talk abstract (Pldi15.Abstract.mp4) | 4.46MiB |
Tue 16 Jun Times are displayed in time zone: Tijuana, Baja California change
14:00 - 15:40 | AnalysisResearch Papers at PLDI Main BLUE (Portland 254-255) Chair(s): Yannis SmaragdakisUniversity of Athens | ||
14:00 25mTalk | DAG Inlining: A Decision Procedure for Reachability-Modulo-Theories in Hierarchical Programs Research Papers Media Attached File Attached | ||
14:25 25mTalk | Exploring and Enforcing Security Guarantees via Program Dependence Graphs Research Papers Andrew JohnsonHarvard University, Lucas WayeHarvard University, Scott MooreHarvard University, Stephen ChongHarvard University Media Attached | ||
14:50 25mTalk | Making Numerical Program Analysis Fast Research Papers Media Attached | ||
15:15 25mTalk | Tree Dependence Analysis Research Papers Yusheng WeijiangPurdue University, Shruthi BalakrishnaPurdue University, Jianqiao LiuPurdue University, Milind KulkarniPurdue University Media Attached |