try to introduce proof hints in program structure
try to introduce proof hints in program structure

instead of having the hoare tactic guess predicate rewrites through
hints, try to have explicit predicate-rewriting statements in the
program flow.  need to figure out how to make these predicate-rewrite
statements atomic with respect to a given program step..

mit-pdos/fscq-impl,mit-pdos/fscq-impl,mit-pdos/fscq-impl,mit-pdos/fscq-impl,mit-pdos/fscq-impl