Placer fails with the following error:
ERROR: [Place 30-380] Design has 46680 flops (which belong to 2202 control sets and 0 of them are latches) and 48516 luts. Their placement requires at least 11598 slices but the device has only 11550 slices.
However, in the post-opt utilization report, the LUTs utilization is 39289, which is less than 48516 mentioned in the error message.
Where does the extra LUTs utilization come from?