First off, this is not the dog's fault. If this is the first time that you have left her out of her crate home alone for an extended period of time, then I would not be surprised to see a mess - especially after 11 hours. She could have been nervous or scared that you weren't there when she was free in her crate, or as someone else mentioned, the fact that it was loose could be a sign of an upset tummy or another medical problem.
Our 10 month old has had free reign of the house since about 6 months old and only once have we come home from work (9 hours) to an accident of his. To graduate her from the crate, I would start with small periods of time for her to get used to being 'free' and alone, say 1 hour for a few days in a week, and then up to 3 or 4 hours for a few days and work your way up to 8-9 hours. I wouldn't leave her alone for more than that amount of time.