YES a__U11ttMNa__U12ttMNa__U12ttMNsa__plusmarkNmarkMa__U21ttMNa__U22ttMNa__U22ttMNa__plusa__xmarkNmarkMmarkNa__plusN0markNa__plusNsMa__U11ttMNa__xN00a__xNsMa__U21ttMNmarkU11X1X2X3a__U11markX1X2X3markU12X1X2X3a__U12markX1X2X3markplusX1X2a__plusmarkX1markX2markU21X1X2X3a__U21markX1X2X3markU22X1X2X3a__U22markX1X2X3markxX1X2a__xmarkX1markX2markttttmarksXsmarkXmark00a__U11X1X2X3U11X1X2X3a__U12X1X2X3U12X1X2X3a__plusX1X2plusX1X2a__U21X1X2X3U21X1X2X3a__U22X1X2X3U22X1X2X3a__xX1X2xX1X22.1a__U1131tt00a__U1231s10a__plus21a__U2132a__U2232a__x22003U1131U1231plus21U2132U2232x22a__U113123tt0a__U123123s11a__plus212mark11a__U213321a__U223321a__x21200U113123U123123plus212U213321U223321x212a__U11ttMNa__U12ttMNa__U21ttMNa__U22ttMNmarkU11X1X2X3a__U11markX1X2X3markU12X1X2X3a__U12markX1X2X3markplusX1X2a__plusmarkX1markX2markU21X1X2X3a__U21markX1X2X3markU22X1X2X3a__U22markX1X2X3markxX1X2a__xmarkX1markX2markttttmarksXsmarkXmark00a__U11X1X2X3U11X1X2X3a__U12X1X2X3U12X1X2X3a__plusX1X2plusX1X2a__U21X1X2X3U21X1X2X3a__U22X1X2X3U22X1X2X3a__xX1X2xX1X21tt01100141mark1150s171a__U113110a__U123100a__U21331a__U223130U11300U12390plus240a__plus250U21321U223120x260a__x280AProVEAProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty Statistics for single proof: 100.00 % (3 real / 0 unknown / 0 assumptions / 3 total proof steps)http://aprove.informatik.rwth-aachen.deJohnDoe