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Adding test for Silicon issue #996 #929

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Merged
marcoeilers merged 1 commit into from
Aug 18, 2026
Merged

Adding test for Silicon issue #996 #929

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24 changes: 24 additions & 0 deletions src/test/resources/all/issues/silicon/0996.vpr
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Original file line number Diff line number Diff line change
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// Any copyright is dedicated to the Public Domain.
// http://creativecommons.org/publicdomain/zero/1.0/


field f: Int
predicate P(x: Ref) { acc(x.f) }
predicate Q(x: Ref) { acc(x.f) }

function snap(x: Ref): Int
requires acc(P(x))
{ unfolding acc(P(x)) in x.f }

method cast(x: Ref)
requires acc(P(x))
ensures acc(Q(x))
ensures unfolding acc(Q(x)) in x.f == old(snap(x))

method test(x: Ref, y: Ref)
requires acc(P(x)) && acc(P(y))
{
package acc(P(y)) --* acc(Q(x)) && acc(P(y)) {
cast(x)
}
}
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