def init_coverage_tables(model1, model1_layer_index, model2, model2_layer_index, model3, model3_layer_index, group_size=1):
    model_layer_dict1 = defaultdict(bool)
    model_layer_dict2 = defaultdict(bool)
    model_layer_dict3 = defaultdict(bool)
    init_dict(model1, model1_layer_index, group_size, model_layer_dict1)
    init_dict(model2, model2_layer_index, group_size, model_layer_dict2)
    init_dict(model3, model3_layer_index, group_size, model_layer_dict3)
    return (model_layer_dict1, model_layer_dict2, model_layer_dict3)
def init_coverage_tables(model1, model1_layer_index, model2, model2_layer_index, model3, model3_layer_index, group_size=1):
    model_layer_dict1 = defaultdict(bool)
    model_layer_dict2 = defaultdict(bool)
    model_layer_dict3 = defaultdict(bool)
    init_dict(model1, model1_layer_index, group_size, model_layer_dict1)
    init_dict(model2, model2_layer_index, group_size, model_layer_dict2)
    init_dict(model3, model3_layer_index, group_size, model_layer_dict3)
    return (model_layer_dict1, model_layer_dict2, model_layer_dict3)