Proof: Do Line At Unchanged 72

Let's prove the following theorem:

if the following are true:
  • expression state at time 72 = "iterate_args"
  • the line at time 72 = 7

then the line at time 73 = 7

Proof:

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Given
1 expression state at time 72 = "iterate_args"
2 the line at time 72 = 7
Proof Table
# Claim Reason
1 the line at time (72 + 1) = the line at time 72 if expression state at time 72 = "iterate_args", then the line at time (72 + 1) = the line at time 72
2 the line at time (72 + 1) = 7 if the line at time (72 + 1) = the line at time 72 and the line at time 72 = 7, then the line at time (72 + 1) = 7
3 72 + 1 = 73 72 + 1 = 73
4 the line at time (72 + 1) = the line at time 73 if 72 + 1 = 73, then the line at time (72 + 1) = the line at time 73
5 the line at time 73 = 7 if the line at time (72 + 1) = the line at time 73 and the line at time (72 + 1) = 7, then the line at time 73 = 7

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