From 2be948e492031e44e9c4dadac29d66fc443012ff Mon Sep 17 00:00:00 2001
From: Ralf Jung <jung@mpi-sws.org>
Date: Wed, 16 Mar 2016 14:10:32 +0100
Subject: [PATCH] docs: timeless rule for invariants
---
docs/derived.tex | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/docs/derived.tex b/docs/derived.tex
index 60afd02e5..df8064034 100644
--- a/docs/derived.tex
+++ b/docs/derived.tex
@@ -202,6 +202,18 @@ The following rules can be derived for Hoare triples.
\inferH{Ht-false}
{}
{\hoare{\FALSE}{\expr}{\Ret \val. \prop}[\mask]}
+\and
+\inferH{Ht-inv}
+ {\hoare{\later\propC*\prop}{\expr}{\Ret\val.\later\propC*\propB}[\mask] \and
+ \physatomic{\expr}
+ }
+ {\knowInv\iname\propC \proves \hoare{\prop}{\expr}{\Ret\val.\propB}[\mask \uplus \set\iname]}
+\and
+\inferH{Ht-inv-timeless}
+ {\hoare{\propC*\prop}{\expr}{\Ret\val.\propC*\propB}[\mask] \and
+ \physatomic{\expr} \and \timeless\propC
+ }
+ {\knowInv\iname\propC \proves \hoare{\prop}{\expr}{\Ret\val.\propB}[\mask \uplus \set\iname]}
\end{mathparpagebreakable}
\paragraph{Lifting of operational semantics.}
--
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