Your time in prison is irrelevant, if you were married, then anything accumulated during that marriage is considered marital in nature and subject to distribution between you. She is wrong in her statements that it all belongs go her.
As to the house, she can't keep you out without a court order. As to obtaining a court order, it would likely be through a restraining order (RO) or something similar. A RO is based on acts of violence or threats of violence. So, assuming you have not been violent towards her, it's unlikely she could obtain exclusive use of the home during the divorce.
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