Proof: Addi Insn 5

Let's prove the following theorem:

if the following are true:

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

then value of cell 1 at time 6 = 1

Instructions

Memory Cells

Program Counter	Time
0	0

LW Computer Simulator

Proof:

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Given

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

Proof Table

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

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