When is my corn beef done?

Put 2 cheap beers and a pepsi in a pot. Then add corned beef, 1/4 head cabbage, 1 russet potato, 3 carrots, and water to cover. Cook on low for 7-9 hours. Then add the rest of cabbage cut into 1/8s, two more potatoes, and 3 more carrots. Cook this at a low boil for 2 more hours until you can easily pull strips of meat off with a fork. Best corned beef ever. It doesn't have to be well done that girl is a tard, but it will be after 10 hours of cooking.