Quantum gravitational wave function for the interior of a black hole and the generalized uncertainty principle

We investigate the internal structures of a Schwarzschild black hole by solving Wheeler-DeWitt equation. The generic bounded wave function has bouncing point around $r \simeq M$, where $M$ is mass. Due to this quantum bouncing, there appears an ambiguity define arrow time. If we introduce two arrows time, one can then interpret that classical spacetime annihilated point. Finally, provide conceptual explanation based on generalized uncertainty principle.