He's said the deal was off unless he's convinced by Twitter's bot numbers [1], which isn't a condition of the deal, so, yeah basically he's said he doesn't want to buy.
And you've interpreted: "Producing that evidence is not a contingency in the deal". Which doesn't make a whole lot of sense.
He never said he didn't want to buy it under the negotiated terms, he said he wants to be able to _verify_ that what the company says is accurate.