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MEVEL Glen
iris-time-proofs
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3c5b1c17
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3c5b1c17
authored
Jul 11, 2018
by
MEVEL Glen
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pointers from the paper to the Coq proofs
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3db8a635
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@@ -83,3 +83,48 @@ Important modules are highlighted.
*
`Examples`
: a very simple example illustrating the use of time credits to
specify a program with lists
*
__
`Thunks`
: implementation of timed thunks using time credits__
### From the paper to the Coq code
#### Generic translation and “tick”
The basic properties of the translation are proven in
`Translation.v`
(for
example,
`translation_subst`
and
`translation_of_val`
).
In
`Simulation.v`
:
*
The operational semantics of “tick” in the nonzero case is given by lemma
`exec_tick_success`
.
*
The “Forward Simulation” lemma is
`simulation_exec_success`
.
*
The “Forward Simulation of Unsafe Behaviors” lemma corresponds roughly to
`safe_translation__safe_here`
.
*
The “Safety Transfer” lemma is
`adequate_translation__adequate`
(in the Coq
development, by contrast with the paper, not only do we prove safety of
programs, but also their _adequacy_ with respect to some formula φ; this is
not a difficult property to transfer anyway).
#### Time credits
In
`TimeCredits.v`
:
*
The “Credit Exhaustion” lemma is
`simulation_exec_failure_now`
.
*
The “Soundness of the Time Credit Translation” lemma is
`simulation_exec_failure`
.
*
The “Time Credit Initialization” lemma does not have an exact counterpart in
the Coq development, but corresponds roughly to a portion of the proof of
`spec_tctranslation__adequate`
. The fact that our implementation matches the
interface is stated by
`TC_implementation`
.
*
The “Soundness of Iris^$ ” lemma is
`abstract_spec_tctranslation__adequate_and_bounded`
.
#### Time receipts
In
`TimeReceipts.v`
:
*
The “Time Receipt Initialization” lemma does not have an exact counterpart
in the Coq development, but corresponds roughly to a portion of the proof of
`spec_trtranslation__adequate_translation`
. The fact that our implementation
matches the interface is stated by
`TR_implementation`
.
*
The “Credit Exhaustion” lemma is
`simulation_exec_failure_now`
.
*
The “Soundness of Iris^⧗ ” lemma is
`abstract_spec_trtranslation__adequate`
.
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