Proof: Write Skip Line State 9

Let's prove the following theorem:

if the following are true:
  • the line at time 9 = 9
  • the tab at time 9 = 1
  • statement at line 9, tab 2 = self.y = 5

then expression state at time 10 = "not_expr"

Proof:

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Given
1 the line at time 9 = 9
2 the tab at time 9 = 1
3 statement at line 9, tab 2 = self.y = 5
Proof Table
# Claim Reason
1 2 > 1 2 > 1
2 expression state at time (9 + 1) = "not_expr" if the line at time 9 = 9 and the tab at time 9 = 1 and statement at line 9, tab 2 = self.y = 5 and 2 > 1, then expression state at time (9 + 1) = "not_expr"
3 9 + 1 = 10 9 + 1 = 10
4 expression state at time (9 + 1) = expression state at time 10 if 9 + 1 = 10, then expression state at time (9 + 1) = expression state at time 10
5 expression state at time 10 = "not_expr" if expression state at time (9 + 1) = expression state at time 10 and expression state at time (9 + 1) = "not_expr", then expression state at time 10 = "not_expr"

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