YES active____XYZmark__X__YZactive__XnilmarkXactive__nilXmarkXactiveandttXmarkXactiveisNePal__I__PImarkttmark__X1X2active__markX1markX2marknilactivenilmarkandX1X2activeandmarkX1X2markttactivettmarkisNePalXactiveisNePalmarkX__markX1X2__X1X2__X1markX2__X1X2__activeX1X2__X1X2__X1activeX2__X1X2andmarkX1X2andX1X2andX1markX2andX1X2andactiveX1X2andX1X2andX1activeX2andX1X2isNePalmarkXisNePalXisNePalactiveXisNePalX2.11active111__21112mark111nil00and211122tt00isNePal111active____XYZmark__X__YZactive__XnilmarkXactive__nilXmarkXactiveisNePal__I__PImarkttmark__X1X2active__markX1markX2marknilactivenilmarkandX1X2activeandmarkX1X2markttactivettmarkisNePalXactiveisNePalmarkX__markX1X2__X1X2__X1markX2__X1X2__activeX1X2__X1X2__X1activeX2__X1X2andmarkX1X2andX1X2andX1markX2andX1X2andactiveX1X2andX1X2andX1activeX2andX1X2isNePalmarkXisNePalXisNePalactiveXisNePalX1active111__221112mark111nil00isNePal111tt00and22122active____XYZmark__X__YZmark__X1X2active__markX1markX2marknilactivenilmarkandX1X2activeandmarkX1X2markttactivettmarkisNePalXactiveisNePalmarkX__markX1X2__X1X2__X1markX2__X1X2__activeX1X2__X1X2__X1activeX2__X1X2andmarkX1X2andX1X2andX1markX2andX1X2andactiveX1X2andX1X2andX1activeX2andX1X2isNePalmarkXisNePalXisNePalactiveXisNePalX1active111__222112mark111nil00and22112tt00isNePal111mark__X1X2active__markX1markX2marknilactivenilmarkandX1X2activeandmarkX1X2markttactivettmarkisNePalXactiveisNePalmarkX__markX1X2__X1X2__X1markX2__X1X2__activeX1X2__X1X2__X1activeX2__X1X2andmarkX1X2andX1X2andX1markX2andX1X2andactiveX1X2andX1X2andX1activeX2andX1X2isNePalmarkXisNePalXisNePalactiveXisNePalX1mark121__221122active1211nil02and222112tt02isNePal1221mark__X1X2active__markX1markX2marknilactivenilmarkandX1X2activeandmarkX1X2markttactivettmarkisNePalXactiveisNePalmarkX__markX1X2__X1X2__X1markX2__X1X2andmarkX1X2andX1X2andX1markX2andX1X2isNePalmarkXisNePalX1mark1121__221112active111nil02and211112tt02isNePal1111AProVEAProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty Statistics for single proof: 100.00 % (6 real / 0 unknown / 0 assumptions / 6 total proof steps)http://aprove.informatik.rwth-aachen.deJohnDoe