2 years term for Siddaramaiah, 3 years for DK Shivakumar. Is there a rotational CM formula on cards for Karnataka?

As the suspense continues over who will be the new chief minister of Karnataka, Congress leaders DK Shivakumar and Siddaramaiah, the two top contenders for the CM post, met the party's top leadership in New Delhi on Tuesday. As per sources, Siddaramaiah will hold the CM post for 2 years and DK Shivakumar for 3 years. However, there is no confirmation on the same from the Congress officials.