Proof: Do Control Map At Unchanged 18

Let's prove the following theorem:

if the following are true:
  • expression state at time 18 = "begin_expr"
  • Control Map at time 18 = [ entry 0: (pair ("while", 2)), [ ] ]

then Control Map at time 19 = [ entry 0: (pair ("while", 2)), [ ] ]

Proof:

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Given
1 expression state at time 18 = "begin_expr"
2 Control Map at time 18 = [ entry 0: (pair ("while", 2)), [ ] ]
Proof Table
# Claim Reason
1 Control Map at time (18 + 1) = Control Map at time 18 if expression state at time 18 = "begin_expr", then Control Map at time (18 + 1) = Control Map at time 18
2 Control Map at time (18 + 1) = [ entry 0: (pair ("while", 2)), [ ] ] if Control Map at time (18 + 1) = Control Map at time 18 and Control Map at time 18 = [ entry 0: (pair ("while", 2)), [ ] ], then Control Map at time (18 + 1) = [ entry 0: (pair ("while", 2)), [ ] ]
3 18 + 1 = 19 18 + 1 = 19
4 Control Map at time (18 + 1) = Control Map at time 19 if 18 + 1 = 19, then Control Map at time (18 + 1) = Control Map at time 19
5 Control Map at time 19 = [ entry 0: (pair ("while", 2)), [ ] ] if Control Map at time (18 + 1) = Control Map at time 19 and Control Map at time (18 + 1) = [ entry 0: (pair ("while", 2)), [ ] ], then Control Map at time 19 = [ entry 0: (pair ("while", 2)), [ ] ]

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