1. To file for Annulment of Marriage, it has to be done within an year of marriage or within one year after the ground for Annulment is found.
2. Since the marriage was never consummated, the couple can try for Annulment of Marriage. The negative factor is, it's being filed after 11 years of marriage.
3. If you are successful in obtaining decree of Annulment of Marriage, then technically it means the marriage has not happened at all and you will be treated as unmarried and not as married and divorced.
4. Court may call for physical examination to prove impotency.
5. Impotent person may marry once again by getting cured of the problem.
6. Best way for the couple is to opt for Mutual Consent Divorce, wherein you can save time, money and no questions asked.