Proof: Addi Insn 24

Let's prove the following theorem:

if the following are true:

instruction #6 is addi dst=2 src=3 imm=0
the PC at time 24 = 6
value of cell 3 at time 24 = 5

then value of cell 2 at time 25 = 5

Instructions

Memory Cells

Program Counter	Time
0	0

LW Computer Simulator

Proof:

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Given

1	instruction #6 is `addi dst=2 src=3 imm=0`
2	the PC at time 24 = 6
3	value of cell 3 at time 24 = 5

Proof Table

#	Claim	Reason
1	value of cell 2 at time (24 + 1) = (value of cell 3 at time 24) + 0	if instruction #6 is `addi dst=2 src=3 imm=0` and the PC at time 24 = 6, then value of cell 2 at time (24 + 1) = (value of cell 3 at time 24) + 0 (ADDI Instruction Property)
2	24 + 1 = 25	24 + 1 = 25 (Fixed Value Statement)
3	value of cell 2 at time (24 + 1) = value of cell 2 at time 25	if 24 + 1 = 25, then value of cell 2 at time (24 + 1) = value of cell 2 at time 25 (Substitution)
4	value of cell 2 at time 25 = (value of cell 3 at time 24) + 0	if value of cell 2 at time (24 + 1) = value of cell 2 at time 25 and value of cell 2 at time (24 + 1) = (value of cell 3 at time 24) + 0, then value of cell 2 at time 25 = (value of cell 3 at time 24) + 0 (Transitive Property of Equality Variation 2)
5	value of cell 2 at time 25 = 5 + 0	if value of cell 2 at time 25 = (value of cell 3 at time 24) + 0 and value of cell 3 at time 24 = 5, then value of cell 2 at time 25 = 5 + 0 (Term 1 Substitution)
6	5 + 0 = 5	5 + 0 = 5 (Additive Identity)
7	value of cell 2 at time 25 = 5	if value of cell 2 at time 25 = 5 + 0 and 5 + 0 = 5, then value of cell 2 at time 25 = 5 (Transitive Property of Equality)

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