Wp.ProofEngineSourceInteractive Proof Engine
A proof tree
A proof node
Consolidated statistics (memoized).
Consolidated results (memoized).
Leaves are numbered from 0 to n-1
type status = [ | `Unprovedproof obligation not proved
*)| `Provedproof obligation is proved
*)| `Pending of intproof is pending
*)| `Passedsmoke test is passed (PO is not proved)
*)| `Invalidsmoke test has failed (PO is proved)
*)| `StillResist of intproof is pending
*) ]