Akmal,
The mind of one who has become a Sotapanna has been ‘taken over’ by the qualities of a Sotapanna. He will not grasp any of those bad kamma at the dying moment, because his mindset is permanently focused on all that is good – sila, dana, the 5 precepts, ever-increasing comprehension and verification in life of Tilakkhana, and, most importantly, Refuge in the Buddha, Dhamma and Sangha and aveccappasada until the very end.
There will be no room for those bad kamma beeja, the conditions in his mind for them to take hold will not be there.