Proof: Do Line At Unchanged 22
Let's prove the following theorem:
if the following are true:
- expression state at time 22 = "iterate_args"
- the line at time 22 = 3
then the line at time 23 = 3
Proof:
Given
1 | expression state at time 22 = "iterate_args" |
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2 | the line at time 22 = 3 |
# | Claim | Reason |
---|---|---|
1 | the line at time (22 + 1) = the line at time 22 | if expression state at time 22 = "iterate_args", then the line at time (22 + 1) = the line at time 22 |
2 | the line at time (22 + 1) = 3 | if the line at time (22 + 1) = the line at time 22 and the line at time 22 = 3, then the line at time (22 + 1) = 3 |
3 | 22 + 1 = 23 | 22 + 1 = 23 |
4 | the line at time (22 + 1) = the line at time 23 | if 22 + 1 = 23, then the line at time (22 + 1) = the line at time 23 |
5 | the line at time 23 = 3 | if the line at time (22 + 1) = the line at time 23 and the line at time (22 + 1) = 3, then the line at time 23 = 3 |
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