Question: Consider Example 5.3. If t is in {x1, x2,, xn}, what do the postconditions say must be true about the value of i after execution?

Consider Example 5.3. If t is in {x1, x2,, xn}, what do the postconditions say must be true about the value of i after execution?

My answer was i = n+1 and Modus ponens but it is incorrect. I'm trying to understand where I went wrong.

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