Stephen Magill Ming-Hsien Tsai Peter Lee Yih-Kuen Tsay THOR: A Tool for Reasoning about Shape and Arithmetic. 428-432 2008 CAV http://dx.doi.org/10.1007/978-3-540-70545-1_41 conf/cav/2008 db/conf/cav/cav2008.html#MagillTLT08