Will my wife be considered divorced if she insults me, after I swore: "By God, if my wife insults me, she will not remain in my house for one minute," given that I forgot I was married at the moment of uttering the phrase?

If, by writing the contract, you intended the lawful marriage contract with its pillars, then the wife is subject to divorce. And your statement, "You will not remain in my house for a minute," is an oath regarding the promise of divorcing her, if you intended divorce when reviled. So, if she reviled you and you did not divorce her, you have broken your oath, and an expiation for an oath is incumbent upon you.