Proofs

• expression state at time 54 = "iterate_args"
• the tab at time 54 = 1

then the tab at time 55 = 1

• expression state at time 54 = "iterate_args"
• stack at time 54 = [ ]

then stack at time 55 = [ ]

• expression state at time 54 = "iterate_args"
• Python Object Store at time 54 = [ [4, 7], [ ] ]

then Python Object Store at time 55 = [ [4, 7], [ ] ]

• expression state at time 54 = "iterate_args"
• Control Map at time 54 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then Control Map at time 55 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

• expression state at time 54 = "iterate_args"
• Variables Map at time 54 = [ entry numbers: (Python reference 0), [ entry value: 4, [ entry x: 28, [ ] ] ] ]

then Variables Map at time 55 = [ entry numbers: (Python reference 0), [ entry value: 4, [ entry x: 28, [ ] ] ] ]

• expression state at time 54 = "iterate_args"
• Class Map at time 54 = [ ]

then Class Map at time 55 = [ ]

• expression state at time 55 = "call_function_begin"
• the expression at time 55 = __mul__(value, 4)
• Python Object Store at time 55 = [ [4, 7], [ ] ]

then Python Object Store at time 56 = [ [4, 7], [ ] ]

• expression state at time 55 = "call_function_begin"
• Value Stack at time 55 = [ [ 4, [ 4, [ ] ] ], [ ] ]
• the expression at time 55 = __mul__(value, 4)

then Return Value at time 56 = 16

• expression state at time 55 = "call_function_begin"
• parent stack at time 55 = [ ]
• the expression at time 55 = __mul__(value, 4)

then expression state at time 56 = "end_expr"

• expression state at time 55 = "call_function_begin"
• Value Stack at time 55 = [ [ 4, [ 4, [ ] ] ], [ ] ]
• the expression at time 55 = __mul__(value, 4)

then Value Stack at time 56 = [ ]

• expression state at time 55 = "call_function_begin"
• arguments stack at time 55 = [ ]

then arguments stack at time 56 = [ ]

• expression state at time 55 = "call_function_begin"
• parent stack at time 55 = [ ]

then parent stack at time 56 = [ ]

• expression state at time 55 = "call_function_begin"
• Control Map at time 55 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then Control Map at time 56 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

• expression state at time 55 = "call_function_begin"
• Variables Map at time 55 = [ entry numbers: (Python reference 0), [ entry value: 4, [ entry x: 28, [ ] ] ] ]

then Variables Map at time 56 = [ entry numbers: (Python reference 0), [ entry value: 4, [ entry x: 28, [ ] ] ] ]

• expression state at time 55 = "call_function_begin"
• the line at time 55 = 5

then the line at time 56 = 5

• expression state at time 55 = "call_function_begin"
• the tab at time 55 = 1

then the tab at time 56 = 1

• expression state at time 55 = "call_function_begin"
• stack at time 55 = [ ]

then stack at time 56 = [ ]

• expression state at time 55 = "call_function_begin"
• Class Map at time 55 = [ ]

then Class Map at time 56 = [ ]

• the line at time 56 = 5
• the tab at time 56 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 56 = "end_expr"
• Variables Map at time 56 = [ entry numbers: (Python reference 0), [ entry value: 4, [ entry x: 28, [ ] ] ] ]
• Return Value at time 56 = 16

then Variables Map at time 57 = [ entry numbers: (Python reference 0), [ entry value: 4, [ entry x: 16, [ ] ] ] ]

• the line at time 56 = 5
• the tab at time 56 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 56 = "end_expr"

then the line at time 57 = 6

• the line at time 56 = 5
• the tab at time 56 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 56 = "end_expr"

then the tab at time 57 = 1

• the line at time 56 = 5
• the tab at time 56 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 56 = "end_expr"
• Python Object Store at time 56 = [ [4, 7], [ ] ]

then Python Object Store at time 57 = [ [4, 7], [ ] ]

• the line at time 56 = 5
• the tab at time 56 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• stack at time 56 = [ ]
• expression state at time 56 = "end_expr"

then stack at time 57 = [ ]

• the line at time 56 = 5
• the tab at time 56 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• Control Map at time 56 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then Control Map at time 57 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

• the line at time 56 = 5
• the tab at time 56 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• Class Map at time 56 = [ ]

then Class Map at time 57 = [ ]

• the line at time 57 = 6
• the tab at time 57 = 1
• number of lines = 5
• Control Map at time 57 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then the line at time 58 = 4

• the line at time 57 = 6
• the tab at time 57 = 1
• number of lines = 5
• Control Map at time 57 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then the tab at time 58 = 0

• the line at time 57 = 6
• the tab at time 57 = 1
• number of lines = 5
• Control Map at time 57 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]
• Variables Map at time 57 = [ entry numbers: (Python reference 0), [ entry value: 4, [ entry x: 16, [ ] ] ] ]

then Variables Map at time 58 = [ entry numbers: (Python reference 0), [ entry value: 4, [ entry x: 16, [ ] ] ] ]

• the line at time 57 = 6
• the tab at time 57 = 1
• number of lines = 5
• Control Map at time 57 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]
• stack at time 57 = [ ]

then stack at time 58 = [ ]

• the line at time 57 = 6
• the tab at time 57 = 1
• number of lines = 5
• Control Map at time 57 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]
• Python Object Store at time 57 = [ [4, 7], [ ] ]

then Python Object Store at time 58 = [ [4, 7], [ ] ]

• the line at time 57 = 6
• the tab at time 57 = 1
• number of lines = 5
• Control Map at time 57 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then Control Map at time 58 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

• the line at time 57 = 6
• the tab at time 57 = 1
• number of lines = 5
• Control Map at time 57 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]
• Class Map at time 57 = [ ]

then Class Map at time 58 = [ ]

• the line at time 58 = 4
• the tab at time 58 = 0
• statement at line 4, tab 0 = for value in numbers:
• Control Map at time 58 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then the line at time 59 = 5

• the line at time 58 = 4
• the tab at time 58 = 0
• statement at line 4, tab 0 = for value in numbers:
• Control Map at time 58 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then the tab at time 59 = 1

• the line at time 58 = 4
• the tab at time 58 = 0
• statement at line 4, tab 0 = for value in numbers:
• Control Map at time 58 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then expression state at time 59 = "not_expr"

• the line at time 58 = 4
• the tab at time 58 = 0
• statement at line 4, tab 0 = for value in numbers:
• Control Map at time 58 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]
• Variables Map at time 58 = [ entry numbers: (Python reference 0), [ entry value: 4, [ entry x: 16, [ ] ] ] ]

then Variables Map at time 59 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

• the line at time 58 = 4
• the tab at time 58 = 0
• statement at line 4, tab 0 = for value in numbers:
• Control Map at time 58 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]

then Control Map at time 59 = [ entry 0: (trio ("for", 4, [ ])), [ ] ]

• the line at time 58 = 4
• the tab at time 58 = 0
• statement at line 4, tab 0 = for value in numbers:
• Control Map at time 58 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]
• stack at time 58 = [ ]

then stack at time 59 = [ ]

• the line at time 58 = 4
• the tab at time 58 = 0
• statement at line 4, tab 0 = for value in numbers:
• Control Map at time 58 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]
• Python Object Store at time 58 = [ [4, 7], [ ] ]

then Python Object Store at time 59 = [ [4, 7], [ ] ]

• the line at time 58 = 4
• the tab at time 58 = 0
• statement at line 4, tab 0 = for value in numbers:
• Control Map at time 58 = [ entry 0: (trio ("for", 4, [ 7, [ ] ])), [ ] ]
• Class Map at time 58 = [ ]

then Class Map at time 59 = [ ]

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"

then the expression at time 60 = __mul__(value, 4)

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"

then expression state at time 60 = "begin_expr"

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"

then the line at time 60 = 5

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"

then the tab at time 60 = 1

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"

then Value Stack at time 60 = [ ]

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"

then parent stack at time 60 = [ ]

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"

then arguments stack at time 60 = [ ]

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"
• Variables Map at time 59 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

then Variables Map at time 60 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"
• stack at time 59 = [ ]

then stack at time 60 = [ ]

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• expression state at time 59 = "not_expr"
• Python Object Store at time 59 = [ [4, 7], [ ] ]

then Python Object Store at time 60 = [ [4, 7], [ ] ]

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• Control Map at time 59 = [ entry 0: (trio ("for", 4, [ ])), [ ] ]

then Control Map at time 60 = [ entry 0: (trio ("for", 4, [ ])), [ ] ]

• the line at time 59 = 5
• the tab at time 59 = 1
• statement at line 5, tab 1 = x = __mul__(value, 4)
• Class Map at time 59 = [ ]

then Class Map at time 60 = [ ]

• expression state at time 60 = "begin_expr"
• the expression at time 60 = __mul__(value, 4)
• Value Stack at time 60 = [ ]

then Value Stack at time 61 = [ [ ], [ ] ]

• expression state at time 60 = "begin_expr"
• the expression at time 60 = __mul__(value, 4)
• parent stack at time 60 = [ ]

then parent stack at time 61 = [ __mul__(value, 4), [ ] ]

• expression state at time 60 = "begin_expr"
• the expression at time 60 = __mul__(value, 4)
• arguments stack at time 60 = [ ]

then arguments stack at time 61 = [ [ value, [ 4, [ ] ] ], [ ] ]

• expression state at time 60 = "begin_expr"
• the expression at time 60 = __mul__(value, 4)

then expression state at time 61 = "iterate_args"

• expression state at time 60 = "begin_expr"
• the expression at time 60 = __mul__(value, 4)

then the expression at time 61 = __mul__(value, 4)

• expression state at time 60 = "begin_expr"
• Variables Map at time 60 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

then Variables Map at time 61 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

• expression state at time 60 = "begin_expr"
• the line at time 60 = 5

then the line at time 61 = 5

• expression state at time 60 = "begin_expr"
• the tab at time 60 = 1

then the tab at time 61 = 1

• expression state at time 60 = "begin_expr"
• stack at time 60 = [ ]

then stack at time 61 = [ ]

• expression state at time 60 = "begin_expr"
• Python Object Store at time 60 = [ [4, 7], [ ] ]

then Python Object Store at time 61 = [ [4, 7], [ ] ]

• expression state at time 60 = "begin_expr"
• Control Map at time 60 = [ entry 0: (trio ("for", 4, [ ])), [ ] ]

then Control Map at time 61 = [ entry 0: (trio ("for", 4, [ ])), [ ] ]

• expression state at time 60 = "begin_expr"
• Class Map at time 60 = [ ]

then Class Map at time 61 = [ ]

• expression state at time 61 = "iterate_args"
• arguments stack at time 61 = [ [ value, [ 4, [ ] ] ], [ ] ]

then the expression at time 62 = value

• expression state at time 61 = "iterate_args"
• arguments stack at time 61 = [ [ value, [ 4, [ ] ] ], [ ] ]

then arguments stack at time 62 = [ [ 4, [ ] ], [ ] ]

• expression state at time 61 = "iterate_args"
• arguments stack at time 61 = [ [ value, [ 4, [ ] ] ], [ ] ]

then expression state at time 62 = "begin_expr"

• expression state at time 61 = "iterate_args"
• arguments stack at time 61 = [ [ value, [ 4, [ ] ] ], [ ] ]
• parent stack at time 61 = [ __mul__(value, 4), [ ] ]

then parent stack at time 62 = [ __mul__(value, 4), [ ] ]

• expression state at time 61 = "iterate_args"
• Value Stack at time 61 = [ [ ], [ ] ]

then Value Stack at time 62 = [ [ ], [ ] ]

• expression state at time 61 = "iterate_args"
• the line at time 61 = 5

then the line at time 62 = 5

• expression state at time 61 = "iterate_args"
• the tab at time 61 = 1

then the tab at time 62 = 1

• expression state at time 61 = "iterate_args"
• stack at time 61 = [ ]

then stack at time 62 = [ ]

• expression state at time 61 = "iterate_args"
• Python Object Store at time 61 = [ [4, 7], [ ] ]

then Python Object Store at time 62 = [ [4, 7], [ ] ]

• expression state at time 61 = "iterate_args"
• Control Map at time 61 = [ entry 0: (trio ("for", 4, [ ])), [ ] ]

then Control Map at time 62 = [ entry 0: (trio ("for", 4, [ ])), [ ] ]

• expression state at time 61 = "iterate_args"
• Variables Map at time 61 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

then Variables Map at time 62 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

• expression state at time 61 = "iterate_args"
• Class Map at time 61 = [ ]

then Class Map at time 62 = [ ]

• expression state at time 62 = "begin_expr"
• Variables Map at time 62 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

then Variables Map at time 63 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

• the expression at time 62 = value
• expression state at time 62 = "begin_expr"
• value is a variable
• parent stack at time 62 = [ __mul__(value, 4), [ ] ]

then expression state at time 63 = "return"

• the expression at time 62 = value
• expression state at time 62 = "begin_expr"
• value is a variable
• Value Stack at time 62 = [ [ ], [ ] ]

then Value Stack at time 63 = [ [ ], [ ] ]

• the expression at time 62 = value
• expression state at time 62 = "begin_expr"
• value is a variable
• arguments stack at time 62 = [ [ 4, [ ] ], [ ] ]

then arguments stack at time 63 = [ [ 4, [ ] ], [ ] ]

• expression state at time 62 = "begin_expr"
• the expression at time 62 = value
• value is a variable
• Variables Map at time 62 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

then Return Value at time 63 = 7

• expression state at time 62 = "begin_expr"
• the expression at time 62 = value
• value is a variable
• parent stack at time 62 = [ __mul__(value, 4), [ ] ]

then parent stack at time 63 = [ __mul__(value, 4), [ ] ]

• expression state at time 62 = "begin_expr"
• the line at time 62 = 5

then the line at time 63 = 5

• expression state at time 62 = "begin_expr"
• the tab at time 62 = 1

then the tab at time 63 = 1

• expression state at time 62 = "begin_expr"
• stack at time 62 = [ ]

then stack at time 63 = [ ]

• expression state at time 62 = "begin_expr"
• Python Object Store at time 62 = [ [4, 7], [ ] ]

then Python Object Store at time 63 = [ [4, 7], [ ] ]

• expression state at time 62 = "begin_expr"
• Control Map at time 62 = [ entry 0: (trio ("for", 4, [ ])), [ ] ]

then Control Map at time 63 = [ entry 0: (trio ("for", 4, [ ])), [ ] ]

• expression state at time 62 = "begin_expr"
• Class Map at time 62 = [ ]

then Class Map at time 63 = [ ]

• expression state at time 63 = "return"
• Value Stack at time 63 = [ [ ], [ ] ]
• Return Value at time 63 = 7

then Value Stack at time 64 = [ [ 7, [ ] ], [ ] ]

• expression state at time 63 = "return"
• Variables Map at time 63 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

then Variables Map at time 64 = [ entry numbers: (Python reference 0), [ entry value: 7, [ entry x: 16, [ ] ] ] ]

• expression state at time 63 = "return"
• the line at time 63 = 5

then the line at time 64 = 5

• expression state at time 63 = "return"
• the tab at time 63 = 1

then the tab at time 64 = 1