Proofs

• expression state at time 25 = "return"
• Control Map at time 25 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then Control Map at time 26 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

• expression state at time 26 = "iterate_args"
• arguments stack at time 26 = [ [ ], [ ] ]
• parent stack at time 26 = [ __mul__(value, 4), [ ] ]

then expression state at time 27 = "call_function_begin"

• expression state at time 26 = "iterate_args"
• arguments stack at time 26 = [ [ ], [ ] ]
• parent stack at time 26 = [ __mul__(value, 4), [ ] ]

then the expression at time 27 = __mul__(value, 4)

• expression state at time 26 = "iterate_args"
• arguments stack at time 26 = [ [ ], [ ] ]
• parent stack at time 26 = [ __mul__(value, 4), [ ] ]

then parent stack at time 27 = [ ]

• expression state at time 26 = "iterate_args"
• arguments stack at time 26 = [ [ ], [ ] ]
• parent stack at time 26 = [ __mul__(value, 4), [ ] ]

then arguments stack at time 27 = [ ]

• expression state at time 26 = "iterate_args"
• Value Stack at time 26 = [ [ 4, [ 1, [ ] ] ], [ ] ]

then Value Stack at time 27 = [ [ 4, [ 1, [ ] ] ], [ ] ]

• expression state at time 26 = "iterate_args"
• the line at time 26 = 3

then the line at time 27 = 3

• expression state at time 26 = "iterate_args"
• the tab at time 26 = 1

then the tab at time 27 = 1

• expression state at time 26 = "iterate_args"
• stack at time 26 = [ ]

then stack at time 27 = [ ]

• expression state at time 26 = "iterate_args"
• Python Object Store at time 26 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 27 = [ [1, 2, 3], [ ] ]

• expression state at time 26 = "iterate_args"
• Control Map at time 26 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then Control Map at time 27 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

• expression state at time 26 = "iterate_args"
• Variables Map at time 26 = [ entry numbers: (Python reference 0), [ entry value: 1, [ ] ] ]

then Variables Map at time 27 = [ entry numbers: (Python reference 0), [ entry value: 1, [ ] ] ]

• expression state at time 26 = "iterate_args"
• Class Map at time 26 = [ ]

then Class Map at time 27 = [ ]

• expression state at time 27 = "call_function_begin"
• the expression at time 27 = __mul__(value, 4)
• Python Object Store at time 27 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 28 = [ [1, 2, 3], [ ] ]

• expression state at time 27 = "call_function_begin"
• Value Stack at time 27 = [ [ 4, [ 1, [ ] ] ], [ ] ]
• the expression at time 27 = __mul__(value, 4)

then Return Value at time 28 = 4

• expression state at time 27 = "call_function_begin"
• parent stack at time 27 = [ ]
• the expression at time 27 = __mul__(value, 4)

then expression state at time 28 = "end_expr"

• expression state at time 27 = "call_function_begin"
• Value Stack at time 27 = [ [ 4, [ 1, [ ] ] ], [ ] ]
• the expression at time 27 = __mul__(value, 4)

then Value Stack at time 28 = [ ]

• expression state at time 27 = "call_function_begin"
• arguments stack at time 27 = [ ]

then arguments stack at time 28 = [ ]

• expression state at time 27 = "call_function_begin"
• parent stack at time 27 = [ ]

then parent stack at time 28 = [ ]

• expression state at time 27 = "call_function_begin"
• Control Map at time 27 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then Control Map at time 28 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

• expression state at time 27 = "call_function_begin"
• Variables Map at time 27 = [ entry numbers: (Python reference 0), [ entry value: 1, [ ] ] ]

then Variables Map at time 28 = [ entry numbers: (Python reference 0), [ entry value: 1, [ ] ] ]

• expression state at time 27 = "call_function_begin"
• the line at time 27 = 3

then the line at time 28 = 3

• expression state at time 27 = "call_function_begin"
• the tab at time 27 = 1

then the tab at time 28 = 1

• expression state at time 27 = "call_function_begin"
• stack at time 27 = [ ]

then stack at time 28 = [ ]

• expression state at time 27 = "call_function_begin"
• Class Map at time 27 = [ ]

then Class Map at time 28 = [ ]

• the line at time 28 = 3
• the tab at time 28 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 28 = "end_expr"
• Variables Map at time 28 = [ entry numbers: (Python reference 0), [ entry value: 1, [ ] ] ]
• Return Value at time 28 = 4

then Variables Map at time 29 = [ entry numbers: (Python reference 0), [ entry value: 1, [ entry x: 4, [ ] ] ] ]

• the line at time 28 = 3
• the tab at time 28 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 28 = "end_expr"

then the line at time 29 = 4

• the line at time 28 = 3
• the tab at time 28 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 28 = "end_expr"

then the tab at time 29 = 1

• the line at time 28 = 3
• the tab at time 28 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 28 = "end_expr"
• Python Object Store at time 28 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 29 = [ [1, 2, 3], [ ] ]

• the line at time 28 = 3
• the tab at time 28 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• stack at time 28 = [ ]
• expression state at time 28 = "end_expr"

then stack at time 29 = [ ]

• the line at time 28 = 3
• the tab at time 28 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• Control Map at time 28 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then Control Map at time 29 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

• the line at time 28 = 3
• the tab at time 28 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• Class Map at time 28 = [ ]

then Class Map at time 29 = [ ]

• the line at time 29 = 4
• the tab at time 29 = 1
• number of lines = 3
• Control Map at time 29 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then the line at time 30 = 2

• the line at time 29 = 4
• the tab at time 29 = 1
• number of lines = 3
• Control Map at time 29 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then the tab at time 30 = 0

• the line at time 29 = 4
• the tab at time 29 = 1
• number of lines = 3
• Control Map at time 29 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]
• Variables Map at time 29 = [ entry numbers: (Python reference 0), [ entry value: 1, [ entry x: 4, [ ] ] ] ]

then Variables Map at time 30 = [ entry numbers: (Python reference 0), [ entry value: 1, [ entry x: 4, [ ] ] ] ]

• the line at time 29 = 4
• the tab at time 29 = 1
• number of lines = 3
• Control Map at time 29 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]
• stack at time 29 = [ ]

then stack at time 30 = [ ]

• the line at time 29 = 4
• the tab at time 29 = 1
• number of lines = 3
• Control Map at time 29 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]
• Python Object Store at time 29 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 30 = [ [1, 2, 3], [ ] ]

• the line at time 29 = 4
• the tab at time 29 = 1
• number of lines = 3
• Control Map at time 29 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then Control Map at time 30 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

• the line at time 29 = 4
• the tab at time 29 = 1
• number of lines = 3
• Control Map at time 29 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]
• Class Map at time 29 = [ ]

then Class Map at time 30 = [ ]

• the line at time 30 = 2
• the tab at time 30 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 30 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then the line at time 31 = 3

• the line at time 30 = 2
• the tab at time 30 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 30 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then the tab at time 31 = 1

• the line at time 30 = 2
• the tab at time 30 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 30 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then expression state at time 31 = "not_expr"

• the line at time 30 = 2
• the tab at time 30 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 30 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]
• Variables Map at time 30 = [ entry numbers: (Python reference 0), [ entry value: 1, [ entry x: 4, [ ] ] ] ]

then Variables Map at time 31 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

• the line at time 30 = 2
• the tab at time 30 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 30 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]

then Control Map at time 31 = [ entry 0: (trio ("for", 2, [ 3, [ ] ])), [ ] ]

• the line at time 30 = 2
• the tab at time 30 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 30 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]
• stack at time 30 = [ ]

then stack at time 31 = [ ]

• the line at time 30 = 2
• the tab at time 30 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 30 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]
• Python Object Store at time 30 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 31 = [ [1, 2, 3], [ ] ]

• the line at time 30 = 2
• the tab at time 30 = 0
• statement at line 2, tab 0 = for value in numbers:
• Control Map at time 30 = [ entry 0: (trio ("for", 2, [ 2, [ 3, [ ] ] ])), [ ] ]
• Class Map at time 30 = [ ]

then Class Map at time 31 = [ ]

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"

then the expression at time 32 = __mul__(value, 4)

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"

then expression state at time 32 = "begin_expr"

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"

then the line at time 32 = 3

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"

then the tab at time 32 = 1

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"

then Value Stack at time 32 = [ ]

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"

then parent stack at time 32 = [ ]

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"

then arguments stack at time 32 = [ ]

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"
• Variables Map at time 31 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

then Variables Map at time 32 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"
• stack at time 31 = [ ]

then stack at time 32 = [ ]

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• expression state at time 31 = "not_expr"
• Python Object Store at time 31 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 32 = [ [1, 2, 3], [ ] ]

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• Control Map at time 31 = [ entry 0: (trio ("for", 2, [ 3, [ ] ])), [ ] ]

then Control Map at time 32 = [ entry 0: (trio ("for", 2, [ 3, [ ] ])), [ ] ]

• the line at time 31 = 3
• the tab at time 31 = 1
• statement at line 3, tab 1 = x = __mul__(value, 4)
• Class Map at time 31 = [ ]

then Class Map at time 32 = [ ]

• expression state at time 32 = "begin_expr"
• the expression at time 32 = __mul__(value, 4)
• Value Stack at time 32 = [ ]

then Value Stack at time 33 = [ [ ], [ ] ]

• expression state at time 32 = "begin_expr"
• the expression at time 32 = __mul__(value, 4)
• parent stack at time 32 = [ ]

then parent stack at time 33 = [ __mul__(value, 4), [ ] ]

• expression state at time 32 = "begin_expr"
• the expression at time 32 = __mul__(value, 4)
• arguments stack at time 32 = [ ]

then arguments stack at time 33 = [ [ value, [ 4, [ ] ] ], [ ] ]

• expression state at time 32 = "begin_expr"
• the expression at time 32 = __mul__(value, 4)

then expression state at time 33 = "iterate_args"

• expression state at time 32 = "begin_expr"
• the expression at time 32 = __mul__(value, 4)

then the expression at time 33 = __mul__(value, 4)

• expression state at time 32 = "begin_expr"
• Variables Map at time 32 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

then Variables Map at time 33 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

• expression state at time 32 = "begin_expr"
• the line at time 32 = 3

then the line at time 33 = 3

• expression state at time 32 = "begin_expr"
• the tab at time 32 = 1

then the tab at time 33 = 1

• expression state at time 32 = "begin_expr"
• stack at time 32 = [ ]

then stack at time 33 = [ ]

• expression state at time 32 = "begin_expr"
• Python Object Store at time 32 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 33 = [ [1, 2, 3], [ ] ]

• expression state at time 32 = "begin_expr"
• Control Map at time 32 = [ entry 0: (trio ("for", 2, [ 3, [ ] ])), [ ] ]

then Control Map at time 33 = [ entry 0: (trio ("for", 2, [ 3, [ ] ])), [ ] ]

• expression state at time 32 = "begin_expr"
• Class Map at time 32 = [ ]

then Class Map at time 33 = [ ]

• expression state at time 33 = "iterate_args"
• arguments stack at time 33 = [ [ value, [ 4, [ ] ] ], [ ] ]

then the expression at time 34 = value

• expression state at time 33 = "iterate_args"
• arguments stack at time 33 = [ [ value, [ 4, [ ] ] ], [ ] ]

then arguments stack at time 34 = [ [ 4, [ ] ], [ ] ]

• expression state at time 33 = "iterate_args"
• arguments stack at time 33 = [ [ value, [ 4, [ ] ] ], [ ] ]

then expression state at time 34 = "begin_expr"

• expression state at time 33 = "iterate_args"
• arguments stack at time 33 = [ [ value, [ 4, [ ] ] ], [ ] ]
• parent stack at time 33 = [ __mul__(value, 4), [ ] ]

then parent stack at time 34 = [ __mul__(value, 4), [ ] ]

• expression state at time 33 = "iterate_args"
• Value Stack at time 33 = [ [ ], [ ] ]

then Value Stack at time 34 = [ [ ], [ ] ]

• expression state at time 33 = "iterate_args"
• the line at time 33 = 3

then the line at time 34 = 3

• expression state at time 33 = "iterate_args"
• the tab at time 33 = 1

then the tab at time 34 = 1

• expression state at time 33 = "iterate_args"
• stack at time 33 = [ ]

then stack at time 34 = [ ]

• expression state at time 33 = "iterate_args"
• Python Object Store at time 33 = [ [1, 2, 3], [ ] ]

then Python Object Store at time 34 = [ [1, 2, 3], [ ] ]

• expression state at time 33 = "iterate_args"
• Control Map at time 33 = [ entry 0: (trio ("for", 2, [ 3, [ ] ])), [ ] ]

then Control Map at time 34 = [ entry 0: (trio ("for", 2, [ 3, [ ] ])), [ ] ]

• expression state at time 33 = "iterate_args"
• Variables Map at time 33 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

then Variables Map at time 34 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

• expression state at time 33 = "iterate_args"
• Class Map at time 33 = [ ]

then Class Map at time 34 = [ ]

• expression state at time 34 = "begin_expr"
• Variables Map at time 34 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

then Variables Map at time 35 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

• the expression at time 34 = value
• expression state at time 34 = "begin_expr"
• value is a variable
• parent stack at time 34 = [ __mul__(value, 4), [ ] ]

then expression state at time 35 = "return"

• the expression at time 34 = value
• expression state at time 34 = "begin_expr"
• value is a variable
• Value Stack at time 34 = [ [ ], [ ] ]

then Value Stack at time 35 = [ [ ], [ ] ]

• the expression at time 34 = value
• expression state at time 34 = "begin_expr"
• value is a variable
• arguments stack at time 34 = [ [ 4, [ ] ], [ ] ]

then arguments stack at time 35 = [ [ 4, [ ] ], [ ] ]

• expression state at time 34 = "begin_expr"
• the expression at time 34 = value
• value is a variable
• Variables Map at time 34 = [ entry numbers: (Python reference 0), [ entry value: 2, [ entry x: 4, [ ] ] ] ]

then Return Value at time 35 = 2

• expression state at time 34 = "begin_expr"
• the expression at time 34 = value
• value is a variable
• parent stack at time 34 = [ __mul__(value, 4), [ ] ]

then parent stack at time 35 = [ __mul__(value, 4), [ ] ]

• expression state at time 34 = "begin_expr"
• the line at time 34 = 3

then the line at time 35 = 3

• expression state at time 34 = "begin_expr"
• the tab at time 34 = 1

then the tab at time 35 = 1