Proof: Do Line At Unchanged 4

Let's prove the following theorem:

if the following are true:
  • expression state at time 4 = "iterate_args"
  • the line at time 4 = 1

then the line at time 5 = 1

Proof:

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

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