pdr_rel_width = 0.0
if max(ndr_rel_width, pdr_rel_width) > state.width_goal:
# We have to narrow some width.
+ # TODO: Prefer NDR, it could invalidate PDR (not vice versa).
if ndr_rel_width >= pdr_rel_width:
new_tr = self.half_step_up(ndr_rel_width, ndr_lo.target_tr)
logging.info("Bisecting for NDR at %s", new_tr)