Update dependency: deps/z3

[rv-jenkins]

No description provided.

[PetarMax]

This is very unfortunate, I have no idea why that proof is failing. Are there any dependencies that need to be synchronised somewhere else? Much more complex SMT queries are passing in real-world engagements, and I'm pretty sure in other tests here as well.

[palinatolmach]

Are there any dependencies that need to be synchronised somewhere else?

@PetarMax I don't think so, but I'll ask @jberthold once he's back on Monday! I planned to push a commit increasing the timeout to see if it helps, you've said that it only passes on your machine with retries and the timeout of 300, right?

[palinatolmach]

I doubled the SMT timeout and retry limit for test_prove_rules[examples/sum-to-n-spec.k] (to 600 and 20, respectively) to see if it helps.

[PetarMax]

There's a slightly deeper problem, likely inside z3. I've pushed a temp fix.