A couple of interesting points in that article.
“Citicorp North America filed a petition Tuesday in the 24th Judicial District Court, seeking the loan payment through the mall's sale.”
This clarifies that the petition was filed on Tuesday, right after the missed payment, which makes more sense.
“The mall's anchor tenants, Dillard's, Sears and JC Penney, own the buildings they occupy, Roberts said.”
This makes it even more sensible for GGP to let the place go, as they probably could not get $95 million for it at this point anyway.