Tangy Brunswick Stew

Name: Tangy Brunswick Stew
Ingredients: 4 tbsp unsalted butter; 1 yellow onion, diced; 3 cloves garlic, minced; 15 oz can fire roasted diced tomatoes with their juices; 4 C chicken stock; 3/4 C sweet BBQ sauce (I like Sweet Baby Ray's Hickory & Brown Sugar or Maple); 1/2 C apple cider vinegar; 1/4 C white distilled vinegar; 2 tbsp Worcestershire sauce; 1 tbsp liquid smoke; 1 1/2 - 2 lbs pulled pork; 2 C frozen corn kernels; 2 C frozen baby lima beans; 1 tsp kosher salt; 1/2 tsp black pepper