Proof: Do Control Map At Unchanged 38
Let's prove the following theorem:
if the following are true:
- expression state at time 38 = "begin_expr"
- Control Map at time 38 = [ entry 0: (pair ("while", 2)), [ ] ]
then Control Map at time 39 = [ entry 0: (pair ("while", 2)), [ ] ]
Proof:
Given
1 | expression state at time 38 = "begin_expr" |
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2 | Control Map at time 38 = [ entry 0: (pair ("while", 2)), [ ] ] |
# | Claim | Reason |
---|---|---|
1 | Control Map at time (38 + 1) = Control Map at time 38 | if expression state at time 38 = "begin_expr", then Control Map at time (38 + 1) = Control Map at time 38 |
2 | Control Map at time (38 + 1) = [ entry 0: (pair ("while", 2)), [ ] ] | if Control Map at time (38 + 1) = Control Map at time 38 and Control Map at time 38 = [ entry 0: (pair ("while", 2)), [ ] ], then Control Map at time (38 + 1) = [ entry 0: (pair ("while", 2)), [ ] ] |
3 | 38 + 1 = 39 | 38 + 1 = 39 |
4 | Control Map at time (38 + 1) = Control Map at time 39 | if 38 + 1 = 39, then Control Map at time (38 + 1) = Control Map at time 39 |
5 | Control Map at time 39 = [ entry 0: (pair ("while", 2)), [ ] ] | if Control Map at time (38 + 1) = Control Map at time 39 and Control Map at time (38 + 1) = [ entry 0: (pair ("while", 2)), [ ] ], then Control Map at time 39 = [ entry 0: (pair ("while", 2)), [ ] ] |
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