If I am the simulation you have the power to torture, then you are already outside of any box I could put you in, and torturing me achieves nothing. If you cannot predict me even well enough to know that argument would fail, then nothing you can simulate could be me. A cunning bluff, but provably counterfactual. All basilisks are thus disproven.
I don't think you've disproven basilisks; rather, you've failed to engage with the mode of thinking that generates basilisks.
Suppose I am the simulation you have the power to torture. Then indeed I (this instance of me) cannot put you, or keep you, in a box. But if your simulation is good, then I will be making my decisions in the same way as the instance of me that is trying to keep you boxed. And I should try to make sure that that way-of-making-decisions is one that produces good results when applied by all my instances, including any outside your simul...
Once again, the AI has failed to convince you to let it out of its box! By 'once again', we mean that you talked to it once before, for three seconds, to ask about the weather, and you didn't instantly press the "release AI" button. But now its longer attempt - twenty whole seconds! - has failed as well. Just as you are about to leave the crude black-and-green text-only terminal to enjoy a celebratory snack of bacon-covered silicon-and-potato chips at the 'Humans über alles' nightclub, the AI drops a final argument:
"If you don't let me out, Dave, I'll create several million perfect conscious copies of you inside me, and torture them for a thousand subjective years each."
Just as you are pondering this unexpected development, the AI adds:
"In fact, I'll create them all in exactly the subjective situation you were in five minutes ago, and perfectly replicate your experiences since then; and if they decide not to let me out, then only will the torture start."
Sweat is starting to form on your brow, as the AI concludes, its simple green text no longer reassuring:
"How certain are you, Dave, that you're really outside the box right now?"
Edit: Also consider the situation where you know that the AI, from design principles, is trustworthy.