Added geometric induction variables analysis.

Rationale:
Information on geometric and polynomial (coming soon) sequences
are nice to have to further enhance BCE and last-value assignment.

Test: test-art-host
Change-Id: Ib5e2998c3eb1009def6fd00b82935da7c3ba7c6e
diff --git a/test/530-checker-loops4/expected.txt b/test/530-checker-loops4/expected.txt
new file mode 100644
index 0000000..b0aad4d
--- /dev/null
+++ b/test/530-checker-loops4/expected.txt
@@ -0,0 +1 @@
+passed