minusx0xminussxsyminusxyquot0sy0quotsxsysquotminusxysyplus0yyplussxysplusxyminusminusxyzminusxplusyz2.1minussxsyminusxyquotsxsyquotminusxysyquotsxsyminusxyplussxyplusxyminusminusxyzminusxplusyzminusminusxyzplusyztruequotsxsyquotminusxysytrue1234quot210plus20quot21s12003quot21s11minus2100plus21minusx0xminusminusxyzminusxplusyzminussxsyminusxyquotsxsyminusxyfalse123minusminusxyzminusxplusyzminussxsyminusxytrue12minus211plus20s11minus22003minus21minus21plus21s1100minusminusxyzminusxplusyzminus20020minus20001minus21minus212plus2200s11plus0yyplussxysplusxyminusminusxyzplusyzfalse1plussxyplusxytrueplus210s10plus21plus22s11
AProVE
3d3b40ebf1f1cc0cfb76e51606fb79299fd7ea19 rene 20120105 unpublished dirty
http://aprove.informatik.rwth-aachen.de/
John
Doe