The cicadas die pretty fast after mating and laying their eggs. So here are two pictures of dead ones.
The ants start cleaning up their bodies pretty quickly from what I observed.
The cicada is a pretty tough insect though. None of my pictures turned out but I saw a cicada where the ants had removed its rear abdomen but it was still moving around with ants clinging to it. In its case, I would have hoped for a quicker death.