abc9 needs a clean afterwards

tests/simple_abc9/run-test.sh

@@ -20,10 +20,12 @@ fi
 cp ../simple/*.v .
 cp ../simple/*.sv .
 DOLLAR='?'
-exec ${MAKE:-make} -f ../tools/autotest.mk $seed *.v EXTRA_FLAGS="-n 300 -p '\
+exec ${MAKE:-make} -f ../tools/autotest.mk $seed *.v *.sv EXTRA_FLAGS="-n 300 -p '\
     hierarchy; \
     synth -run coarse; \
     opt -full; \
-    techmap; abc9 -lut 4 -box ../abc.box; \
+    techmap; \
+    abc9 -lut 4 -box ../abc.box; \
+    clean; \
     check -assert; \
     select -assert-none t:${DOLLAR}_NOT_ t:${DOLLAR}_AND_ %%'"