Hacker News Reader

Yes, another part of Barr's testimony was a series of proof-of-concept demonstrations on the ECU to demonstrate the ability to kill tasks, leaving the hardware those tasks were controlling in unintended states.

>was it ever demonstrated that unintended acceleration could actually arise from the behavior of this software?

That's entirely the wrong question to ask. The correct question is "has the system design been proven to make it impossible for unintended acceleration to occur?"

> was it ever demonstrated that unintended acceleration could actually arise from the behavior of this software?

No, but the software engineering practices were so bad that it was a moot point.