Proof: Do Line At Unchanged 69

Let's prove the following theorem:

if the following are true:
  • expression state at time 69 = "call_function_begin"
  • the line at time 69 = 12

then the line at time 70 = 12

Proof:

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Given
1 expression state at time 69 = "call_function_begin"
2 the line at time 69 = 12
Proof Table
# Claim Reason
1 the line at time (69 + 1) = the line at time 69 if expression state at time 69 = "call_function_begin", then the line at time (69 + 1) = the line at time 69
2 the line at time (69 + 1) = 12 if the line at time (69 + 1) = the line at time 69 and the line at time 69 = 12, then the line at time (69 + 1) = 12
3 69 + 1 = 70 69 + 1 = 70
4 the line at time (69 + 1) = the line at time 70 if 69 + 1 = 70, then the line at time (69 + 1) = the line at time 70
5 the line at time 70 = 12 if the line at time (69 + 1) = the line at time 70 and the line at time (69 + 1) = 12, then the line at time 70 = 12

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