def concretize_store_idx(self, idx, strategies=None):
        """
        Concretizes a store index.

        :param idx:             An expression for the index.
        :param strategies:      A list of concretization strategies (to override the default).
        :param min_idx:         Minimum value for a concretized index (inclusive).
        :param max_idx:         Maximum value for a concretized index (exclusive).
        :returns:               A list of concrete indexes.
        """
        if isinstance(idx, int):
            return [idx]
        elif not self.state.solver.symbolic(idx):
            return [self.state.solver.eval(idx)]

        strategies = self.store_strategies if strategies is None else strategies
        return self._apply_concretization_strategies(idx, strategies, 'store')