converts an input state into a state with symbolic registers
        :return: the symbolic state

def _make_regs_symbolic(input_state, reg_list, project):
        """
        converts an input state into a state with symbolic registers
        :return: the symbolic state
        """
        state = input_state.copy()
        # overwrite all registers
        for reg in reg_list:
            state.registers.store(reg, state.solver.BVS("sreg_" + reg + "-", project.arch.bits, explicit_name=True))
        # restore sp
        state.regs.sp = input_state.regs.sp
        # restore bp
        state.regs.bp = input_state.regs.bp
        return state