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The last example exposes a bug on dealing with extensionality and lambda.
Z3 should have returned unsat (or unknown).
The first axiomatization tends to admit more efficient reasoning because search does not have to expand store-select axioms.
As far as I know, there are three ways to assgin values to an array in z3.
z3 returns unsat when the constraint
(assert (= a1 a2))
is added.Add
(assert (= a3 a4))
and we obtain unsat again.But if we add
(assert (= a5 a6))
, z3 returns sat. Why?By the way, is there any (better) way to assign values to an array in z3?
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