Proof: Do Arg Stack At Unchanged 9
Let's prove the following theorem:
if the following are true:
- expression state at time 9 = "call_function_begin"
- arguments stack at time 9 = [ ]
then arguments stack at time 10 = [ ]
Proof:
Given
1 | expression state at time 9 = "call_function_begin" |
---|---|
2 | arguments stack at time 9 = [ ] |
# | Claim | Reason |
---|---|---|
1 | arguments stack at time (9 + 1) = arguments stack at time 9 | if expression state at time 9 = "call_function_begin", then arguments stack at time (9 + 1) = arguments stack at time 9 |
2 | arguments stack at time (9 + 1) = [ ] | if arguments stack at time (9 + 1) = arguments stack at time 9 and arguments stack at time 9 = [ ], then arguments stack at time (9 + 1) = [ ] |
3 | 9 + 1 = 10 | 9 + 1 = 10 |
4 | arguments stack at time (9 + 1) = arguments stack at time 10 | if 9 + 1 = 10, then arguments stack at time (9 + 1) = arguments stack at time 10 |
5 | arguments stack at time 10 = [ ] | if arguments stack at time (9 + 1) = arguments stack at time 10 and arguments stack at time (9 + 1) = [ ], then arguments stack at time 10 = [ ] |
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