Proof: Do Line At Unchanged 39

Let's prove the following theorem:

if the following are true:

expression state at time 39 = "call_function_begin"
the line at time 39 = 2

then the line at time 40 = 2

Proof:

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Given

1	expression state at time 39 = "call_function_begin"
2	the line at time 39 = 2

Proof Table

#	Claim	Reason
1	the line at time (39 + 1) = the line at time 39	if expression state at time 39 = "call_function_begin", then the line at time (39 + 1) = the line at time 39 (Assign Parent (6))
2	the line at time (39 + 1) = 2	if the line at time (39 + 1) = the line at time 39 and the line at time 39 = 2, then the line at time (39 + 1) = 2 (Transitive Property of Equality)
3	39 + 1 = 40	39 + 1 = 40 (Fixed Value Statement)
4	the line at time (39 + 1) = the line at time 40	if 39 + 1 = 40, then the line at time (39 + 1) = the line at time 40 (Substitution)
5	the line at time 40 = 2	if the line at time (39 + 1) = the line at time 40 and the line at time (39 + 1) = 2, then the line at time 40 = 2 (Transitive Property of Equality Variation 2)

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