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Noticed one invariant in HoareLogic was more complex than required

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Adam Chlipala 2021-04-12 16:03:38 -04:00
parent 1d93f6f994
commit 796fc8d64c
2 changed files with 3 additions and 4 deletions
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4
DependentInductiveTypes_template.v
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@ -540,7 +540,7 @@ Proof.
induct s1; simplify; subst; simplify; auto. induct s1; simplify; subst; simplify; auto.
Qed. Qed.
Local Hint Rewrite substring_app_fst substring_app_snd using solve [trivial]. Hint Rewrite substring_app_fst substring_app_snd using solve [trivial].
(* BOREDOM'S END! *) (* BOREDOM'S END! *)
@ -635,7 +635,7 @@ Proof.
induct s; substring. induct s; substring.
Qed. Qed.
Hint Extern 1 (String _ _ = String _ _) => f_equal : core. Local Hint Extern 1 (String _ _ = String _ _) => f_equal : core.
Lemma substring_stack : forall s n2 m1 m2, Lemma substring_stack : forall s n2 m1 m2,
m1 <= m2 m1 <= m2

3
HoareLogic.v
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@ -398,8 +398,7 @@ Local Hint Extern 1 (_ <= _) => linear_arithmetic : core.
Theorem selectionSort_ok : Theorem selectionSort_ok :
{{_&_ ~> True}} {{_&_ ~> True}}
"i" <- 0;; "i" <- 0;;
{{h&v ~> v $! "i" <= v $! "n" {{h&v ~> (forall i j, i < j < v $! "i" -> h $! (v $! "a" + i) <= h $! (v $! "a" + j))
/\ (forall i j, i < j < v $! "i" -> h $! (v $! "a" + i) <= h $! (v $! "a" + j))
/\ (forall i j, i < v $! "i" -> v $! "i" <= j < v $! "n" -> h $! (v $! "a" + i) <= h $! (v $! "a" + j)) }} /\ (forall i j, i < v $! "i" -> v $! "i" <= j < v $! "n" -> h $! (v $! "a" + i) <= h $! (v $! "a" + j)) }}
while "i" < "n" loop while "i" < "n" loop
"j" <- "i"+1;; "j" <- "i"+1;;