code: def emulate_until(self, target: int):
          
          self._concrete = True
          self._break_unicorn_at = target
          if self.emu:
              self.emu._stop_at = target
docs: Tells the CPU to set up a concrete unicorn emulator and use it to execute instructions
          until target is reached.
  
          :param target: Where Unicorn should hand control back to Manticore. Set to 0 for all instructions.