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Flattening problem with set variables #72
Solving the following model produces two solutions: one with "obj = true" and one with "obj= false", while there should really only be the one with "obj = true" as which is constrained to be non-empty.
I could observe the behaviour with 2.0.8 and 2.0.10. Surprisingly enough, the "exists" construct translates into an "array_bool_and", would it be the problem?