Yices model doesn't collect all uninterpreted sort values

[Bupaheh]

In the following example sortValues doesn't contain value

with(KContext()) {
    KYicesSolver(this).use { solver ->
        val sort = mkUninterpretedSort("sort")

        val value = mkUninterpretedSortValue(sort, 0)
        val a by sort

        solver.assert(a neq value)
        solver.check()

        val model = solver.model()
        val sortValues = model.uninterpretedSortUniverse(sort)!!

        println(value in sortValues)
    }
}