set i = a,k1 <=0_goto ((card I) + 2);
set G = Goto ((card J) + 1);
reconsider IJ = (I ';' (Goto ((card J) + 1))) ';' J as shiftable Program of SCMPDS by Lm1;
if>0 a,k1,I,J = (((a,k1 <=0_goto ((card I) + 2)) ';' I) ';' (Goto ((card J) + 1))) ';' J by SCMPDS_6:def 5
.= ((a,k1 <=0_goto ((card I) + 2)) ';' (I ';' (Goto ((card J) + 1)))) ';' J by SCMPDS_4:50
.= (a,k1 <=0_goto ((card I) + 2)) ';' IJ by SCMPDS_4:50
.= (Load (a,k1 <=0_goto ((card I) + 2))) ';' IJ by SCMPDS_4:def 4 ;
hence if>0 a,k1,I,J is shiftable ; :: thesis: verum