This is the snippet of def file after

cts

stage. The design is

spm

. It seemed as if the cells are overlapping each other. This looks more like global placement, shouldn't

detailed_placement

put the cells neatly in the rows with zero overlap?

The overlap is because the power rails at the top/bottom of the cells are shared between adjacent rows.

Ah so that's how it is, I had a hunch. Thanks @tnt