Roy Armoni Limor Fix Ranan Fraer Tamir Heyman Moshe Y. Vardi Yakir Vizel Yael Zbar Deeper Bound in BMC by Combining Constant Propagation and Abstraction. 304-309 2007 conf/aspdac/2007 ASP-DAC http://doi.ieeecomputersociety.org/10.1109/ASPDAC.2007.358003 db/conf/aspdac/aspdac2007.html#ArmoniFFHVVZ07