Breadth-First with Depth-First BDD Construction: A Hybrid Approach,

This paper presents the technique of operator sifting as a new way of understanding both breadth-first and depth-first approaches to BDD construction. A new algorithm is also proposed to capture the breadth-first approachs advantage of memory access locality, while keeping the depth-first approachs advantage of low memory overhead. Our preliminary experimental results show that our approach is generally faster than other implementations that rely exclusively on either breadth-first or depth-first approaches while keeping memory overhead comparable to that of depth-first approaches.