[20:51:23] ╭──────────────────────────────────────────────────────────────────────────────────────────── 🤖 Prompt: ────────────────────────────────────────────────────────────────────────────────────────────╮ utils.py:24
           │ Write Python code that extends the `Module` class below to complete the following task.                                                                                                            │
           │                                                                                                                                                                                                    │
           │ > Consider a (strongly simplified) booking system at a cashier of a supermarket. The system consists of three processes: the bar code reader BCR, the actual booking program BP, and the printer   │
           │ Printer. The bar code reader reads a bar code and communicates the data of the just scanned product to the booking program. On receiving such data, the booking program transmits the price of the │
           │ article to the printer that prints the article Id together with the price on the receipt. The interactions between the bar code reader and the booking program, and between the booking program    │
           │ and the printer is performed by handshaking. Each process consist of just two states, named 0 and 1. BCR transitions from state 0 to state 1 when a bar code is scanned, and from state 1 to state │
           │ 0 when the data is sent to BP. BP transitions from state 0 to state 1 when it receives data from BCR, and from state 1 to state 0 when it sends the print command to the printer Printer           │
           │ transitions from state 0 to state 1 when the print code is sent by BP, and from state 1 to state 0 when the article is printed.  The complete system is given by: BCR || BP || Printer. Model this │
           │ system. Use the variable names BCR_state, BP_state and Printer_state.                                                                                                                              │
           │                                                                                                                                                                                                    │
           │ Reply with your Python code inside one unique code block.                                                                                                                                          │
           │                                                                                                                                                                                                    │
           │ ```python                                                                                                                                                                                          │
           │ class Module:                                                                                                                                                                                      │
           │     """An abstract class to represent a UCLID5 module."""                                                                                                                                          │
           │                                                                                                                                                                                                    │
           │     def types(self):                                                                                                                                                                               │
           │         """(Optional) Defines the type declarations.                                                                                                                                               │
           │         For example, the following implementation defines a 8-bit type called T:                                                                                                                   │
           │         ```                                                                                                                                                                                        │
           │         def types(self):                                                                                                                                                                           │
           │             self.T = BitVector(8)                                                                                                                                                                  │
           │         ```                                                                                                                                                                                        │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │                                                                                                                                                                                                    │
           │     def locals(self):                                                                                                                                                                              │
           │         """(Optional) Defines the local variables and their types.                                                                                                                                 │
           │         For example, the following implementation defines an 8-bit variable x                                                                                                                      │
           │         and an integer variable y:                                                                                                                                                                 │
           │         ```                                                                                                                                                                                        │
           │         def locals(self):                                                                                                                                                                          │
           │             self.x = BitVector(8)                                                                                                                                                                  │
           │             self.y = Integer()                                                                                                                                                                     │
           │         ```                                                                                                                                                                                        │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │                                                                                                                                                                                                    │
           │     def inputs(self):                                                                                                                                                                              │
           │         """(Optional) Defines the input variables and their types.                                                                                                                                 │
           │         For example, the following implementation defines an input variable x,                                                                                                                     │
           │         which is an array of 8-bit bitvectors indexed by 2-bit bitvectors:                                                                                                                         │
           │         ```                                                                                                                                                                                        │
           │         def inputs(self):                                                                                                                                                                          │
           │             self.x = Array(BitVector(2), BitVector(8))                                                                                                                                             │
           │         ```                                                                                                                                                                                        │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │                                                                                                                                                                                                    │
           │     def outputs(self):                                                                                                                                                                             │
           │         """(Optional) Defines the output variables and their types.                                                                                                                                │
           │         For example, the following implementation defines an output variable y,                                                                                                                    │
           │         which is a real number:                                                                                                                                                                    │
           │         ```                                                                                                                                                                                        │
           │         def outputs(self):                                                                                                                                                                         │
           │             self.y = Real()                                                                                                                                                                        │
           │         ```                                                                                                                                                                                        │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │                                                                                                                                                                                                    │
           │     def shared_vars(self):                                                                                                                                                                         │
           │         """(Optional) Defines the shared variables and their types.                                                                                                                                │
           │         For example, the following implementation defines a shared variable z,                                                                                                                     │
           │         which is an array of booleans indexed by integers:                                                                                                                                         │
           │         ```                                                                                                                                                                                        │
           │         def shared_vars(self):                                                                                                                                                                     │
           │             self.z = Array(Integer(), Boolean())                                                                                                                                                   │
           │         ```                                                                                                                                                                                        │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │                                                                                                                                                                                                    │
           │     def instances(self):                                                                                                                                                                           │
           │         """(Optional) Defines the instances of other modules and relates their                                                                                                                     │
           │         input, output, and shared variables to local variables. Every instance                                                                                                                     │
           │         variable must be related to a local variable. For example, let M be                                                                                                                        │
           │         another module with inputs x and y, and output z. The following                                                                                                                            │
           │         implementation defines an instance of M called m, and connects M's                                                                                                                         │
           │         input variable x to the local variable self.a, M's input variable y to                                                                                                                     │
           │         the local variable self.b, and M's output variable z to the local                                                                                                                          │
           │         variable self.c:                                                                                                                                                                           │
           │         ```                                                                                                                                                                                        │
           │         def instances(self):                                                                                                                                                                       │
           │             self.m = M(x=self.a, y=self.b, z=self.c)                                                                                                                                               │
           │         ```                                                                                                                                                                                        │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │                                                                                                                                                                                                    │
           │     def init(self):                                                                                                                                                                                │
           │         """(Optional) Defines how variables are initialized.                                                                                                                                       │
           │         For example, the following implementation initializes x to 0 if y is                                                                                                                       │
           │         greater than or equal to 20:                                                                                                                                                               │
           │         ```                                                                                                                                                                                        │
           │         def init(self):                                                                                                                                                                            │
           │             if self.y >= 20:                                                                                                                                                                       │
           │                 self.x = 0                                                                                                                                                                         │
           │         ```                                                                                                                                                                                        │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │                                                                                                                                                                                                    │
           │     def next(self):                                                                                                                                                                                │
           │         """(Optional) Defines the transition relation.                                                                                                                                             │
           │         For example, the following implementation increments x or decrements y                                                                                                                     │
           │         depending on z:                                                                                                                                                                            │
           │         ```                                                                                                                                                                                        │
           │         def next(self):                                                                                                                                                                            │
           │             if self.z:                                                                                                                                                                             │
           │                 self.x = self.x + 1                                                                                                                                                                │
           │             else:                                                                                                                                                                                  │
           │                 self.y = self.y - 1                                                                                                                                                                │
           │         ```                                                                                                                                                                                        │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │                                                                                                                                                                                                    │
           │     def specification(self):                                                                                                                                                                       │
           │         """(Optional) Defines the specification in terms of invariant properties.                                                                                                                  │
           │                                                                                                                                                                                                    │
           │         Returns:                                                                                                                                                                                   │
           │             bool: True if the specification is satisfied, False otherwise.                                                                                                                         │
           │                                                                                                                                                                                                    │
           │         For example, the following implementation defines two invariants:                                                                                                                          │
           │         ```                                                                                                                                                                                        │
           │         def specification(self):                                                                                                                                                                   │
           │             return self.x < 10 and self.y > 0                                                                                                                                                      │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │                                                                                                                                                                                                    │
           │     def proof(self):                                                                                                                                                                               │
           │         """(Optional) Defines the control block.                                                                                                                                                   │
           │         For example, the following implementation uses 1-induction to prove                                                                                                                        │
           │         that the specification always holds:                                                                                                                                                       │
           │         ```                                                                                                                                                                                        │
           │         def proof(self):                                                                                                                                                                           │
           │             induction(1)                                                                                                                                                                           │
           │         ```                                                                                                                                                                                        │
           │         """                                                                                                                                                                                        │
           │         pass                                                                                                                                                                                       │
           │ ```                                                                                                                                                                                                │
           │                                                                                                                                                                                                    │
           │ I can definitely do that! Here is the Python code:                                                                                                                                                 │
           │ ```python                                                                                                                                                                                          │
           │                                                                                                                                                                                                    │
           ╰────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
[20:51:25] ╭──────────────────────── 🧠 Response: ────────────────────────╮                                                                                                                                       utils.py:42
           │ class BookingSystem(Module):                                 │
           │     def locals(self):                                        │
           │         self.BCR_state = BitVector(1)                        │
           │         self.BP_state = BitVector(1)                         │
           │         self.Printer_state = BitVector(1)                    │
           │                                                              │
           │     def next(self):                                          │
           │         if self.BCR_state == 0:                              │
           │             self.BCR_state = 1                               │
           │         elif self.BCR_state == 1:                            │
           │             self.BCR_state = 0                               │
           │                                                              │
           │         if self.BP_state == 0 and self.BCR_state == 1:       │
           │             self.BP_state = 1                                │
           │         elif self.BP_state == 1 and self.Printer_state == 0: │
           │             self.BP_state = 0                                │
           │                                                              │
           │         if self.BP_state == 1:                               │
           │             self.Printer_state = 1                           │
           │         elif self.Printer_state == 1:                        │
           │             self.Printer_state = 0                           │
           │ ```                                                          │
           ╰──────────────────────────────────────────────────────────────╯
           ╭─────────────────────── 🤖 Extracted: ────────────────────────╮                                                                                                                                       utils.py:24
           │                                                              │
           │ class BookingSystem(Module):                                 │
           │     def locals(self):                                        │
           │         self.BCR_state = BitVector(1)                        │
           │         self.BP_state = BitVector(1)                         │
           │         self.Printer_state = BitVector(1)                    │
           │                                                              │
           │     def next(self):                                          │
           │         if self.BCR_state == 0:                              │
           │             self.BCR_state = 1                               │
           │         elif self.BCR_state == 1:                            │
           │             self.BCR_state = 0                               │
           │                                                              │
           │         if self.BP_state == 0 and self.BCR_state == 1:       │
           │             self.BP_state = 1                                │
           │         elif self.BP_state == 1 and self.Printer_state == 0: │
           │             self.BP_state = 0                                │
           │                                                              │
           │         if self.BP_state == 1:                               │
           │             self.Printer_state = 1                           │
           │         elif self.Printer_state == 1:                        │
           │             self.Printer_state = 0                           │
           ╰──────────────────────────────────────────────────────────────╯
[20:51:26] ╭────────────────────────────────────────── 🤖 Repaired: ──────────────────────────────────────────╮                                                                                                   utils.py:24
           │ class BookingSystem(Module):                                                                     │
           │   def locals(self):                                                                              │
           │     self.BCR_state = BitVector(1)                                                                │
           │     self.BP_state = BitVector(1)                                                                 │
           │     self.Printer_state = BitVector(1)                                                            │
           │                                                                                                  │
           │   def next(self):                                                                                │
           │     if (self.BCR_state == BitVectorVal(0, 1)):                                                   │
           │       self.BCR_state = BitVectorVal(1, 1)                                                        │
           │     else:                                                                                        │
           │       if (self.BCR_state == BitVectorVal(1, 1)):                                                 │
           │         self.BCR_state = BitVectorVal(0, 1)                                                      │
           │     if ((self.BP_state == BitVectorVal(0, 1)) and (self.BCR_state == BitVectorVal(1, 1))):       │
           │       self.BP_state = BitVectorVal(1, 1)                                                         │
           │     else:                                                                                        │
           │       if ((self.BP_state == BitVectorVal(1, 1)) and (self.Printer_state == BitVectorVal(0, 1))): │
           │         self.BP_state = BitVectorVal(0, 1)                                                       │
           │     if (self.BP_state == BitVectorVal(1, 1)):                                                    │
           │       self.Printer_state = BitVectorVal(1, 1)                                                    │
           │     else:                                                                                        │
           │       if (self.Printer_state == BitVectorVal(1, 1)):                                             │
           │         self.Printer_state = BitVectorVal(0, 1)                                                  │
           │                                                                                                  │
           │                                                                                                  │
           ╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
           ╭────── 🤖 Stats: ──────╮                                                                                                                                                                              utils.py:24
           │ Original Lines: 22    │
           │ Final Lines:    23    │
           │ LLM Calls:      1     │
           │ LLM Time:       2.69s │
           │ Repair Time:    0.61s │
           ╰───────────────────────╯
