diff --git a/SMTInterpol/src/de/uni_freiburg/informatik/ultimate/smtinterpol/interpolate/ArrayInterpolator.java b/SMTInterpol/src/de/uni_freiburg/informatik/ultimate/smtinterpol/interpolate/ArrayInterpolator.java
index 4604a05af..e1887cefa 100644
--- a/SMTInterpol/src/de/uni_freiburg/informatik/ultimate/smtinterpol/interpolate/ArrayInterpolator.java
+++ b/SMTInterpol/src/de/uni_freiburg/informatik/ultimate/smtinterpol/interpolate/ArrayInterpolator.java
@@ -996,9 +996,11 @@ public void addDiseq(Occurrence headOcc, Occurrence tailOcc) {
 				mHead.closeAPath(mTail, boundaryHeadTerm, headOcc);
 				mHead.openAPath(mTail, boundaryHeadTerm, headOcc);
 				mHead.closeAPath(mTail, boundaryHeadTerm, mDiseqInfo);
+				mHead.openAPath(mTail, boundaryHeadTerm, mDiseqInfo);
 				mTail.closeAPath(mHead, boundaryTailTerm, tailOcc);
 				mTail.openAPath(mHead, boundaryTailTerm, tailOcc);
 				mTail.closeAPath(mHead, boundaryTailTerm, mDiseqInfo);
+				mTail.openAPath(mHead, boundaryTailTerm, mDiseqInfo);
 
 				if (mLemmaInfo.getLemmaType().equals(":read-over-weakeq")) {
 					if (mIndexEquality != null) {