Validates whether the particular model is created properly

def validate(self):
        """
        Validates whether the particular model is created properly
        """
        if self.stoichiometry_matrix.cols != self.propensities.rows:
            raise ValueError('There must be a column in stoichiometry matrix '
                             'for each row in propensities matrix. '
                             'S ({0.rows}x{0.cols}): {0!r} , '
                             'propensities ({1.rows}x{1.cols}): {1!r}'.format(self.stoichiometry_matrix,
                                                                              self.propensities))

        if self.stoichiometry_matrix.rows != len(self.species):
            raise ValueError('There must be a row in stoichiometry matrix for each variable. '
                             'S ({0.rows}x{0.cols}): {0!r}, variables: {1!r}'.format(self.stoichiometry_matrix,
                                                                                     self.species))

        seen_free_symbols = set()
        parameters = set(self.parameters)
        species = set(self.species)

        # Check if there are any parameters in both lists
        intersection = parameters & species
        if intersection:
            raise ValueError("Some symbols are in both parameters and species lists")

        both = parameters | species
        for row in self.propensities:
            free_symbols = row.free_symbols
            # Do not check the seen symbols twice
            free_symbols = free_symbols - seen_free_symbols
            for symbol in free_symbols:
                if symbol not in both:
                    raise ValueError('Propensity {0!r} '
                                     'contains a free symbol {1!r} '
                                     'that is not in listed in parameters or species lists '
                                     'Parameters: {2!r}; '
                                     'Species: {3!r}'.format(row, symbol,
                                                             self.parameters,
                                                             self.species))

            seen_free_symbols.update(free_symbols)