Yes, I think you did! It's a brilliantly diabolical design! It's not quite the same, but there's a short story by Alastair Reynolds (I think in Galactic North)

Yes, I think you did! It's a brilliantly diabolical design! It's not quite the same, but there's a short story by Alastair Reynolds (I think in Galactic North) where a missile forces a ship to run forever, chasing it out of the galaxy as the universe ages around them (I think).