The colonel whose words provided the headline subsequently admitted misspeaking. From your linked story:
But in an update from the Royal Aeronautical Society on Friday, Hamilton admitted he "misspoke" during his presentation. Hamilton said the story of a rogue AI was a "thought experiment" that came from outside the military, and not based on any actual testing.
"We've never run that experiment, nor would we need to in order to realize that this is a plausible outcome," Hamilton told the Society. "Despite this being a hypothetical example, this illustrates the real-world challenges posed by AI-powered capability."
In a statement to Insider, Air Force spokesperson Ann Stefanek also denied that any simulation took place.
[Emphasis added -- Thump]