What is the status of remote_z3?

Doing some routine maintenance (e.g. cb9d981fa9a0), I've come across it, and tried it out to see if it still works. All I managed was to produce the following example error:

  declare [[smt_solver = remote_z3, smt_trace]]
  lemma "(p1 ∧ p2) ∨ p3 ⟶ (p1 ⟶ (p3 ∧ p2) ∨ (p1 ∧ p3)) ∨ p1" by smt

  ...
  SMT: Result:
       ssh: connect to host lxlabbroy11 port 22: No route to host


What is the purpose of remote_z3 anyway? Doesn't it require the same non-commercial user agreement as the local version? Maybe it is just a left-over from the old times where Z3 was not uniformly available on all platforms, and we didn't have an Isabelle component for it.


        Makarius
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