消除z3中的条件约束

Question

我有以下限制条件：

# Trying to express these constraints:
# if x == 1:
#   y == 2
# else: 
#   y == 3
# y == 3 || y == 2

x, y = z3.Ints("x y")
goal = z3.Goal()
goal.add(If(x == 1, y == 2, y == 3))
goal.add(Or(y == 2, y == 3))

strat = Then(
          "simplify",
          "propagate-values",
          "split-clause",
          "elim-term-ite")

simplified = strat(goal)
print(simplified.as_expr())                                                                                                                                               
# prints the following:
# Or(And(If(x == 1, y == 2, y == 3),                                                                                                               
#           y == 2),                                                                                                                                                  
#       And(If(x == 1, y == 2, y == 3),                                                                                                               
#           y == 3))

我希望z3消除 OR 约束，因为在给定If约束的情况下它是多余的。我有什么战术可以使用或预处理约束来实现？