Proof: Write Skip Line State 5

Let's prove the following theorem:

if the following are true:

the line at time 5 = 6
the tab at time 5 = 1
statement at line 6, tab 2 = self.x = self.x + 5

then expression state at time 6 = "not_expr"

Proof:

View as a tree | View dependent proofs | Try proving it

Given

1	the line at time 5 = 6
2	the tab at time 5 = 1
3	statement at line 6, tab 2 = `self.x = self.x + 5`

Proof Table

#	Claim	Reason
1	2 > 1	2 > 1 (Fixed Value Statement)
2	expression state at time (5 + 1) = "not_expr"	if the line at time 5 = 6 and the tab at time 5 = 1 and statement at line 6, tab 2 = `self.x = self.x + 5` and 2 > 1, then expression state at time (5 + 1) = "not_expr" (Skip Line Tab Property)
3	5 + 1 = 6	5 + 1 = 6 (Fixed Value Statement)
4	expression state at time (5 + 1) = expression state at time 6	if 5 + 1 = 6, then expression state at time (5 + 1) = expression state at time 6 (Substitution)
5	expression state at time 6 = "not_expr"	if expression state at time (5 + 1) = expression state at time 6 and expression state at time (5 + 1) = "not_expr", then expression state at time 6 = "not_expr" (Transitive Property of Equality Variation 2)

Comments

Please log in to add comments