predsxxminusx0xminusxsypredminusxyquot0sy0quotsxsysquotminusxysy2.1minusxsypredminusxyminusxsyminusxyquotsxsyquotminusxysyquotsxsyminusxytruequotsxsyquotminusxysytrue123quot2111quot212s1111minus211000pred111minusx0xminusxsypredminusxypredsxxquotsxsyminusxyfalse12minusxsyminusxytrue1minus200231minus21112s1111minusxsypredminusxyfalse
AProVE
3d3b40ebf1f1cc0cfb76e51606fb79299fd7ea19 rene 20120105 unpublished dirty
http://aprove.informatik.rwth-aachen.de/
John
Doe