msortnilnilmsort.xy.minxymsortdelminxy.xyminxnilxminx.yzif<=xyminxzminyzdelxnilnildelx.yzif=xyz.ydelxz2.110msort.xyminxymsort.xymsortdelminxy.xymsort.xydelminxy.xyminx.yzminxzminx.yzminyzdelx.yzdelxztruemsort.xymsortdelminxy.xytrueminxnilxminx.yzif<=xyminxzminyzdelx.yzif=xyz.ydelxzdelxnilnilminx0nilminx0.x1x2delx0nildelx0.x1x21.222del211if301msort11.2del2if3delx.yzif=xyz.ydelxzmsort.xyminxyfalsemsort.xydelminxy.xyfalseminx.yzminyzminx.yzminxztrueminx.yzminyz2true12true2minx.yzminxz1false12true2delx.yzdelxztruedelx.yzdelxz1false12true2AProVEAProVE Commit ID: 794c25de1cacf0d048858bcd21c9a779e1221865 marcel 20200619 unpublished dirty Statistics for single proof: 100.00 % (13 real / 0 unknown / 0 assumptions / 13 total proof steps)http://aprove.informatik.rwth-aachen.deJohnDoe