if the following are true:

• the line at time t = i
• the tab at time t = j
• statement at line i, tab j = for target in iterable:
• map (Control Map at time t) does not contain a for loop entry at line: i and tab: j
• Expression Stack at time t = [ ]

then Expression Stack at time (t + 1) = [ [ iterable, [ ] ], [ ] ]