Proof: Do Variables At Unchanged 65

Let's prove the following theorem:

if the following are true:

expression state at time 65 = "return"
Variables Map at time 65 = [ entry self: (Python reference 0), [ ] ]

then Variables Map at time 66 = [ entry self: (Python reference 0), [ ] ]

Proof:

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Given

1	expression state at time 65 = "return"
2	Variables Map at time 65 = [ entry self: (Python reference 0), [ ] ]

Proof Table

#	Claim	Reason
1	Variables Map at time (65 + 1) = Variables Map at time 65	if expression state at time 65 = "return", then Variables Map at time (65 + 1) = Variables Map at time 65 (Return (5))
2	Variables Map at time (65 + 1) = [ entry self: (Python reference 0), [ ] ]	if Variables Map at time (65 + 1) = Variables Map at time 65 and Variables Map at time 65 = [ entry self: (Python reference 0), [ ] ], then Variables Map at time (65 + 1) = [ entry self: (Python reference 0), [ ] ] (Transitive Property of Equality)
3	65 + 1 = 66	65 + 1 = 66 (Fixed Value Statement)
4	Variables Map at time (65 + 1) = Variables Map at time 66	if 65 + 1 = 66, then Variables Map at time (65 + 1) = Variables Map at time 66 (Substitution)
5	Variables Map at time 66 = [ entry self: (Python reference 0), [ ] ]	if Variables Map at time (65 + 1) = Variables Map at time 66 and Variables Map at time (65 + 1) = [ entry self: (Python reference 0), [ ] ], then Variables Map at time 66 = [ entry self: (Python reference 0), [ ] ] (Transitive Property of Equality Variation 2)

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