module BCR {
  type state_t = enum { S0, S1 };
  var BCR_state : state_t;

  init {
    BCR_state = S0;
  }

  next {
    case
      BCR_state == S0 : BCR_state' = S1;
      BCR_state == S1 : BCR_state' = S0;
      true : BCR_state' = BCR_state;
    esac
  }
}

module BP {
  type state_t = enum { S0, S1 };
  var BP_state : state_t;

  init {
    BP_state = S0;
  }

  next {
    case
      BP_state == S0 : BP_state' = S1;
      BP_state == S1 : BP_state' = S0;
      true : BP_state' = BP_state;
    esac
  }
}

module Printer {
  type state_t = enum { S0, S1 };
  var Printer_state : state_t;

  init {
    Printer_state = S0;
  }

  next {
    case
      Printer_state == S0 : Printer_state' = S1;
      Printer_state == S1 : Printer_state' = S0;
      true : Printer_state' = Printer_state;
    esac
  }
}

module main {
  instance bcr : BCR;
  instance bp : BP;
  instance printer : Printer;

  init {
    // Initialization logic if needed
  }

  next {
    // Model interactions between BCR, BP, and Printer
    // This will likely involve conditional logic to ensure the correct sequencing of state transitions
  }
}
