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diff --git a/omega/examples/old_test/cfft2d1 b/omega/examples/old_test/cfft2d1
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+#
+# A (memory-based!) data dependence relation from a greatly simplified
+# cfft2d1.t that was causing us trouble.
+#
+
+symbolic line22(1), im_1(2);
+
+flow := { [iii_w,jj_w] -> [iii_r,jj_r] :
+	   im_1(In) = im_1(Out)
+	&& 1 <= jj_w
+	&& jj_w <= line22(In)
+	&& 1 <= iii_w
+	&& iii_w <= 200
+	&& 1 <= jj_r
+	&& jj_r <= line22(Out)
+	&& 1 <= iii_r
+	&& iii_r <= 200 };
+
+zero_plus := { [i1,j1] -> [i2,j2] : i1 = i2 && j1 < j2 };
+
+flow intersection zero_plus;