Proofs

• expression state at time 9 = "begin_expr"
• stack at time 9 = [ ]

then stack at time 10 = [ ]

• expression state at time 9 = "begin_expr"
• Python Object Store at time 9 = [ ]

then Python Object Store at time 10 = [ ]

• expression state at time 9 = "begin_expr"
• Control Map at time 9 = [ ]

then Control Map at time 10 = [ ]

• expression state at time 9 = "begin_expr"
• Variables Map at time 9 = [ ]

then Variables Map at time 10 = [ ]

• expression state at time 9 = "begin_expr"
• Class Map at time 9 = [ ]

then Class Map at time 10 = [ ]

• expression state at time 10 = "return"
• Value Stack at time 10 = [ [ 2, [ 1, [ ] ] ], [ ] ]
• Return Value at time 10 = 3

then Value Stack at time 11 = [ [ 3, [ 2, [ 1, [ ] ] ] ], [ ] ]

• expression state at time 10 = "return"
• Variables Map at time 10 = [ ]

then Variables Map at time 11 = [ ]

• expression state at time 10 = "return"
• the line at time 10 = 1

then the line at time 11 = 1

• expression state at time 10 = "return"
• the tab at time 10 = 0

then the tab at time 11 = 0

• expression state at time 10 = "return"
• arguments stack at time 10 = [ [ ], [ ] ]

then arguments stack at time 11 = [ [ ], [ ] ]

• expression state at time 10 = "return"
• parent stack at time 10 = [ [1, 2, 3], [ ] ]

then parent stack at time 11 = [ [1, 2, 3], [ ] ]

• expression state at time 10 = "return"
• stack at time 10 = [ ]

then stack at time 11 = [ ]

• expression state at time 10 = "return"
• Class Map at time 10 = [ ]

then Class Map at time 11 = [ ]

• expression state at time 10 = "return"
• Python Object Store at time 10 = [ ]

then Python Object Store at time 11 = [ ]

• expression state at time 10 = "return"
• Control Map at time 10 = [ ]

then Control Map at time 11 = [ ]

• expression state at time 11 = "iterate_args"
• arguments stack at time 11 = [ [ ], [ ] ]
• parent stack at time 11 = [ [1, 2, 3], [ ] ]

then expression state at time 12 = "call_function_begin"

• expression state at time 11 = "iterate_args"
• arguments stack at time 11 = [ [ ], [ ] ]
• parent stack at time 11 = [ [1, 2, 3], [ ] ]

then the expression at time 12 = [1, 2, 3]

• expression state at time 11 = "iterate_args"
• arguments stack at time 11 = [ [ ], [ ] ]
• parent stack at time 11 = [ [1, 2, 3], [ ] ]

then parent stack at time 12 = [ ]

• expression state at time 11 = "iterate_args"
• arguments stack at time 11 = [ [ ], [ ] ]
• parent stack at time 11 = [ [1, 2, 3], [ ] ]

then arguments stack at time 12 = [ ]

• expression state at time 11 = "iterate_args"
• Value Stack at time 11 = [ [ 3, [ 2, [ 1, [ ] ] ] ], [ ] ]

then Value Stack at time 12 = [ [ 3, [ 2, [ 1, [ ] ] ] ], [ ] ]

• expression state at time 11 = "iterate_args"
• the line at time 11 = 1

then the line at time 12 = 1

• expression state at time 11 = "iterate_args"
• the tab at time 11 = 0

then the tab at time 12 = 0

• expression state at time 11 = "iterate_args"
• stack at time 11 = [ ]

then stack at time 12 = [ ]

• expression state at time 11 = "iterate_args"
• Python Object Store at time 11 = [ ]

then Python Object Store at time 12 = [ ]

• expression state at time 11 = "iterate_args"
• Control Map at time 11 = [ ]

then Control Map at time 12 = [ ]

• expression state at time 11 = "iterate_args"
• Variables Map at time 11 = [ ]

then Variables Map at time 12 = [ ]

• expression state at time 11 = "iterate_args"
• Class Map at time 11 = [ ]

then Class Map at time 12 = [ ]

• expression state at time 12 = "call_function_begin"
• Value Stack at time 12 = [ [ 3, [ 2, [ 1, [ ] ] ] ], [ ] ]
• the expression at time 12 = [1, 2, 3]
• Python Object Store at time 12 = [ ]

then Python Object Store at time 13 = [ [1, 2, 3], [ ] ]

• expression state at time 12 = "call_function_begin"
• Value Stack at time 12 = [ [ 3, [ 2, [ 1, [ ] ] ] ], [ ] ]
• the expression at time 12 = [1, 2, 3]
• Python Object Store at time 12 = [ ]

then Return Value at time 13 = Python reference 0

• expression state at time 12 = "call_function_begin"
• parent stack at time 12 = [ ]
• the expression at time 12 = [1, 2, 3]

then expression state at time 13 = "end_expr"

• expression state at time 12 = "call_function_begin"
• Value Stack at time 12 = [ [ 3, [ 2, [ 1, [ ] ] ] ], [ ] ]
• the expression at time 12 = [1, 2, 3]

then Value Stack at time 13 = [ ]

• expression state at time 12 = "call_function_begin"
• arguments stack at time 12 = [ ]

then arguments stack at time 13 = [ ]

• expression state at time 12 = "call_function_begin"
• parent stack at time 12 = [ ]

then parent stack at time 13 = [ ]

• expression state at time 12 = "call_function_begin"
• Control Map at time 12 = [ ]

then Control Map at time 13 = [ ]

• expression state at time 12 = "call_function_begin"
• Variables Map at time 12 = [ ]

then Variables Map at time 13 = [ ]

• expression state at time 12 = "call_function_begin"
• the line at time 12 = 1

then the line at time 13 = 1

• expression state at time 12 = "call_function_begin"
• the tab at time 12 = 0

then the tab at time 13 = 0

• expression state at time 12 = "call_function_begin"
• stack at time 12 = [ ]

then stack at time 13 = [ ]

• expression state at time 12 = "call_function_begin"
• Class Map at time 12 = [ ]

then Class Map at time 13 = [ ]

• the line at time 13 = 1
• the tab at time 13 = 0
• statement at line 1, tab 0 = numbers = [1, 2, 3]
• expression state at time 13 = "end_expr"
• Variables Map at time 13 = [ ]
• Return Value at time 13 = Python reference 0

then Variables Map at time 14 = [ entry numbers: (Python reference 0), [ ] ]

• the line at time 13 = 1
• the tab at time 13 = 0
• statement at line 1, tab 0 = numbers = [1, 2, 3]
• expression state at time 13 = "end_expr"

then the line at time 14 = 2

• the line at time 13 = 1
• the tab at time 13 = 0
• statement at line 1, tab 0 = numbers = [1, 2, 3]
• expression state at time 13 = "end_expr"

then the tab at time 14 = 0

• the line at time 13 = 1
• the tab at time 13 = 0
• statement at line 1, tab 0 = numbers = [1, 2, 3]
• expression state at time 13 = "end_expr"
• Python Object Store at time 13 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 14 = [ [1, 2, 3], [ ] ]

• the line at time 13 = 1
• the tab at time 13 = 0
• statement at line 1, tab 0 = numbers = [1, 2, 3]
• stack at time 13 = [ ]
• expression state at time 13 = "end_expr"

then stack at time 14 = [ ]

• the line at time 13 = 1
• the tab at time 13 = 0
• statement at line 1, tab 0 = numbers = [1, 2, 3]
• Control Map at time 13 = [ ]

then Control Map at time 14 = [ ]

• the line at time 13 = 1
• the tab at time 13 = 0
• statement at line 1, tab 0 = numbers = [1, 2, 3]
• Class Map at time 13 = [ ]

then Class Map at time 14 = [ ]

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then the expression at time 15 = numbers

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then expression state at time 15 = "begin_expr"

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then the line at time 15 = 2

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then the tab at time 15 = 0

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then Value Stack at time 15 = [ ]

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then parent stack at time 15 = [ ]

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then arguments stack at time 15 = [ ]

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• Python Object Store at time 14 = [ [1, 2, 3], [ ] ]
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then Python Object Store at time 15 = [ [1, 2, 3], [ ] ]

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• Control Map at time 14 = [ ]
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then Control Map at time 15 = [ ]

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 14 = "not_expr"
• Variables Map at time 14 = [ entry numbers: (Python reference 0), [ ] ]
• map (Control Map at time 14) does not contain a for loop entry at line: 2 and tab: 0

then Variables Map at time 15 = [ entry numbers: (Python reference 0), [ ] ]

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• stack at time 14 = [ ]
• numbers is a variable

then stack at time 15 = [ ]

• the line at time 14 = 2
• the tab at time 14 = 0
• statement at line 2, tab 0 = for value in numbers:
• Class Map at time 14 = [ ]
• numbers is a variable

then Class Map at time 15 = [ ]

• expression state at time 15 = "begin_expr"
• Variables Map at time 15 = [ entry numbers: (Python reference 0), [ ] ]

then Variables Map at time 16 = [ entry numbers: (Python reference 0), [ ] ]

• the expression at time 15 = numbers
• expression state at time 15 = "begin_expr"
• numbers is a variable
• parent stack at time 15 = [ ]

then expression state at time 16 = "end_expr"

• the expression at time 15 = numbers
• expression state at time 15 = "begin_expr"
• numbers is a variable
• Value Stack at time 15 = [ ]

then Value Stack at time 16 = [ ]

• the expression at time 15 = numbers
• expression state at time 15 = "begin_expr"
• numbers is a variable
• arguments stack at time 15 = [ ]

then arguments stack at time 16 = [ ]

• expression state at time 15 = "begin_expr"
• the expression at time 15 = numbers
• numbers is a variable
• Variables Map at time 15 = [ entry numbers: (Python reference 0), [ ] ]

then Return Value at time 16 = Python reference 0

• expression state at time 15 = "begin_expr"
• the expression at time 15 = numbers
• numbers is a variable
• parent stack at time 15 = [ ]

then parent stack at time 16 = [ ]

• expression state at time 15 = "begin_expr"
• the line at time 15 = 2

then the line at time 16 = 2

• expression state at time 15 = "begin_expr"
• the tab at time 15 = 0

then the tab at time 16 = 0

• expression state at time 15 = "begin_expr"
• stack at time 15 = [ ]

then stack at time 16 = [ ]

• expression state at time 15 = "begin_expr"
• Python Object Store at time 15 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 16 = [ [1, 2, 3], [ ] ]

• expression state at time 15 = "begin_expr"
• Control Map at time 15 = [ ]

then Control Map at time 16 = [ ]

• expression state at time 15 = "begin_expr"
• Class Map at time 15 = [ ]

then Class Map at time 16 = [ ]

• the line at time 16 = 2
• the tab at time 16 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 16 = "end_expr"

then the line at time 17 = 2

• the line at time 16 = 2
• the tab at time 16 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 16 = "end_expr"

then the tab at time 17 = 0

• the line at time 16 = 2
• the tab at time 16 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 16 = "end_expr"
• Variables Map at time 16 = [ entry numbers: (Python reference 0), [ ] ]

then Variables Map at time 17 = [ entry numbers: (Python reference 0), [ ] ]

• the line at time 16 = 2
• the tab at time 16 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 16 = "end_expr"
• stack at time 16 = [ ]

then stack at time 17 = [ ]

• the line at time 16 = 2
• the tab at time 16 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 16 = "end_expr"
• Python Object Store at time 16 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 17 = [ [1, 2, 3], [ ] ]

• the line at time 16 = 2
• the tab at time 16 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 16 = "end_expr"
• Class Map at time 16 = [ ]

then Class Map at time 17 = [ ]

• the line at time 16 = 2
• the tab at time 16 = 0
• statement at line 2, tab 0 = for value in numbers:
• expression state at time 16 = "end_expr"
• Return Value at time 16 = Python reference 0
• Control Map at time 16 = [ ]
• the element at index 0 of stack (Python Object Store at time 16) = [1, 2, 3]

then Control Map at time 17 = [ entry 0: (trio ("for", 2, [ 1, [ 2, [ 3, [ ] ] ] ])), [ ] ]

• the line at time 17 = 2
• the tab at time 17 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 17 = [ entry 0: (trio ("for", 2, [ 1, [ 2, [ 3, [ ] ] ] ])), [ ] ]

then the line at time 18 = 3

• the line at time 17 = 2
• the tab at time 17 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 17 = [ entry 0: (trio ("for", 2, [ 1, [ 2, [ 3, [ ] ] ] ])), [ ] ]

then the tab at time 18 = 1

• the line at time 17 = 2
• the tab at time 17 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 17 = [ entry 0: (trio ("for", 2, [ 1, [ 2, [ 3, [ ] ] ] ])), [ ] ]

then expression state at time 18 = "not_expr"

• the line at time 17 = 2
• the tab at time 17 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 17 = [ entry 0: (trio ("for", 2, [ 1, [ 2, [ 3, [ ] ] ] ])), [ ] ]
• Variables Map at time 17 = [ entry numbers: (Python reference 0), [ ] ]

then Variables Map at time 18 = [ entry numbers: (Python reference 0), [ entry value: 1, [ ] ] ]