Another article: http://www.nfl.com/news/story/0ap100000 ... ke-pay-cut
Regarding Dumervil, it's not a cap issue with the Broncos (their cap can absorb Dumervil's contract fine) but rather an issue with value. Peyton Manning and Champ Bailey are already making a ton, and Von Miller is already the team's best pass rusher and overall defensive player. Dumervil's production is nice, and might be worth 12 million dollars a year on another team, but not on the Broncos.
Since Dumervil is most likely not going to accept a pay cut, I see him getting released from the team. He might be willing to restructure like Tom Brady, but since it's not an issue with fitting him under the cap, it won't change anything since the Broncos are looking rather for value. And the Broncos are going to look to invest heavily in Von Miller anyways.