  Numerical evidence is presented that the Poisson-Israel mass inflation
instability at the inner horizon of an accreting, rotating black hole is
generically followed by Belinskii-Khalatnikov-Lifshitz oscillatory collapse to
a spacelike singularity. The computation involves following all 6 degrees of
freedom of the gravitational field. To simplify the problem, the computation
takes as initial conditions the conformally separable solutions of
arXiv:1010.1269, arXiv:1010.1271 just above the inner horizon of a slowly
accreting, rotating black hole, and integrates the equations inward along
single latitudes.
