Proof: Write Stmt Control Map At Unchanged 12

Let's prove the following theorem:

if the following are true:
  • the line at time 12 = 3
  • the tab at time 12 = 1
  • statement at line 3, tab 1 = a = __add__(a, 1)
  • Control Map at time 12 = [ entry 0: (pair ("while", 2)), [ ] ]

then Control Map at time 13 = [ entry 0: (pair ("while", 2)), [ ] ]

Proof:

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Given
1 the line at time 12 = 3
2 the tab at time 12 = 1
3 statement at line 3, tab 1 = a = __add__(a, 1)
4 Control Map at time 12 = [ entry 0: (pair ("while", 2)), [ ] ]
Proof Table
# Claim Reason
1 Control Map at time (12 + 1) = Control Map at time 12 if the line at time 12 = 3 and the tab at time 12 = 1 and statement at line 3, tab 1 = a = __add__(a, 1), then Control Map at time (12 + 1) = Control Map at time 12
2 Control Map at time (12 + 1) = [ entry 0: (pair ("while", 2)), [ ] ] if Control Map at time (12 + 1) = Control Map at time 12 and Control Map at time 12 = [ entry 0: (pair ("while", 2)), [ ] ], then Control Map at time (12 + 1) = [ entry 0: (pair ("while", 2)), [ ] ]
3 12 + 1 = 13 12 + 1 = 13
4 Control Map at time (12 + 1) = Control Map at time 13 if 12 + 1 = 13, then Control Map at time (12 + 1) = Control Map at time 13
5 Control Map at time 13 = [ entry 0: (pair ("while", 2)), [ ] ] if Control Map at time (12 + 1) = Control Map at time 13 and Control Map at time (12 + 1) = [ entry 0: (pair ("while", 2)), [ ] ], then Control Map at time 13 = [ entry 0: (pair ("while", 2)), [ ] ]

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