I found Aerosvit's CoC on their Polish web-site, their UA sites just return errors:
Passenger and luggage carriage rules of Aerosvit Airlines
It basically says in the result of a cancellation, for any reason, they will (at your option) transport you on the next flight that has a seat or give you a refund.
No promises to cover any incurred losses (hotels, meals, etc) but that would not protect them from reasonable claims - if you want to go to court.