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-rw-r--r--Source/AbsInt/IntervalDomain.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/AbsInt/IntervalDomain.cs b/Source/AbsInt/IntervalDomain.cs
index 3d83bb5c..be62eb58 100644
--- a/Source/AbsInt/IntervalDomain.cs
+++ b/Source/AbsInt/IntervalDomain.cs
@@ -667,7 +667,7 @@ namespace Microsoft.Boogie.AbstractInterpretation
Lo = 1 - hi;
}
if (lo != null) {
- Hi = -lo;
+ Hi = 1 - lo;
}
}
else if (op.Op == UnaryOperator.Opcode.Not) {