CTL model checking based on forward state traversal

We present a CTL model checking algorithm based mainly on forward state traversal, which can check many realistic CTL properties without doing backward state traversal. This algorithm is effective in many situations where backward state traversal is more expensive than forward state traversal. We combine it with BDD-based state traversal techniques using partitioned transition relations. Experimental results show that our method can verify actual CTL properties of large industrial models which cannot be handled by conventional model checkers.