@inproceedings{NFM2012:BrSi,
 author = {J{\"o}rg Brauer and Axel Simon},
 title = {Inferring Definite Counterexamples through Under-Approximation},
 booktitle = {Proceedings of the 4th  NASA Formal Methods Symposium (NFM 2012)},
 volume = {7226},
 editor = {Alwyn E. Goodloe and Suzette Person},
 location = {Norfolk, VA, USA},
 publisher = {Springer-Verlag},
 address = {Berlin, Heidelberg},
 pages = {54--69},
 month = {April},
 year = {2012}
}