Asap7 coralnpu with lower CORE_UTILIZATION gets "stuck" in DRT

[jeffng-or]

Subject

[Stage]: Detail Router.

Describe the bug

When the CORE_UTILIZATION is lowered to 55, asap7 coralnpu gets stuck on two violations in DRT:

Iteration	Violation Count
5	2321
10	511
20	19
28	2
30	2
40	2
50	2
60	2

I interrupted the job after that.

The remaining issues are in the regfile module:

violation type: Short
	srcs: net:core.score/regfile/_07790_ net:core.score/regfile/_07792_
	bbox = (50.1250, 221.5800) - (50.2070, 221.5980) on Layer M2
violation type: Metal Spacing
	srcs: net:core.score/regfile/_07789_ net:VDD
	bbox = (50.0580, 221.6860) - (50.0730, 221.6870) on Layer M3

Expected Behavior

Successful DRT completion

Environment

orfs git commit tag: 7ff3adf8eda37712a40591dbd8ec3bef449e6fee

To Reproduce

mkissue tarball: https://drive.google.com/file/d/1YoLRYEVx808W7DZmkVG7OnpmQxbFC8dR/view?usp=drive_link

Relevant log output

Screenshots

No response

Additional Context

No response