Function extern_spec_u64_checked_div 

pub fn extern_spec_u64_checked_div(self_: u64, rhs: u64) -> Option<u64>

extern spec for u64::checked_div

This is not a real function: its only use is for documentation.

terminates

ghost

ensures

(result == None) == (rhs@ == 0 || (self@ == $type::MIN@ && rhs@ == -1))

ensures

forall<r: $type> result == Some(r) ==> r@ == self@ / rhs@