Proof: Byte 3 Stays the Same 10
Let's prove the following theorem:
if the following are true:
- instruction #6 is
jump imm=3
- the PC at time 10 = 6
- value of cell 3 at time 10 = 3
then value of cell 3 at time 11 = 3
Proof:
Given
1 | instruction #6 is jump imm=3 |
---|---|
2 | the PC at time 10 = 6 |
3 | value of cell 3 at time 10 = 3 |
# | Claim | Reason |
---|---|---|
1 | value of cell 3 at time (10 + 1) = value of cell 3 at time 10 | if instruction #6 is jump imm=3 and the PC at time 10 = 6, then value of cell 3 at time (10 + 1) = value of cell 3 at time 10 |
2 | 10 + 1 = 11 | 10 + 1 = 11 |
3 | value of cell 3 at time (10 + 1) = value of cell 3 at time 11 | if 10 + 1 = 11, then value of cell 3 at time (10 + 1) = value of cell 3 at time 11 |
4 | value of cell 3 at time 11 = value of cell 3 at time 10 | if value of cell 3 at time (10 + 1) = value of cell 3 at time 11 and value of cell 3 at time (10 + 1) = value of cell 3 at time 10, then value of cell 3 at time 11 = value of cell 3 at time 10 |
5 | value of cell 3 at time 11 = 3 | if value of cell 3 at time 11 = value of cell 3 at time 10 and value of cell 3 at time 10 = 3, then value of cell 3 at time 11 = 3 |
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