Hybrid On-the-Fly LTL Model Checking with the Sweep-Line Method

Abstract

The sweep-line method allows explicit state model checkers to delete states from memory on-the-fly during state space exploration thereby lowering the memory demands of the verification procedure. The sweep-line method is based on a least progress-first search order that prohibits the immediate use of standard on-the-fly LTL model checking algorithms that rely on a depth-first search order. This paper proposes and experimentally evaluates an algorithm for LTL model checking compatible with the search order prescribed by the sweep-line method.