Positions where pt and p2 variables are written:

x(lpoint), y(mpoint), z(npoint), lpoint, mpoint, npoint=
 -0.24544E-01 -0.24544E-01  0.00000E+00      67    67     4

x(lpoint2), y(mpoint2), z(npoint2), lpoint2, mpoint2, npoint2=
  -1.6935      -1.6935      0.00000E+00      33    33     4

x(lpoint)-x(lpoint2), y(mpoint)-y(mpoint2), z(npoint)-z(npoint2)=
   1.6690       1.6690      0.00000E+00