Fix computation of product acceptance conditions, when the

two operands share some acceptance conditions.
* src/tgba/tgbaproduct.hh (tgba_product::left_acc_complement_,
tgba_product::right_acc_complement_): New attribute.
* src/tgba/tgbaproduct.cc (tgba_product::tgba_product): Set them.
(tgba_product::succ_iter): Use them.
* src/tgba/explpro2.test: New file.
* src/tgba/Makefile.am (TESTS): Add it.

src/tgbatest/Makefile.am

@@ -38,10 +38,11 @@ TESTS = \
   ltlprod.test \
   bddprod.test \
   explprod.test \
+  explpro2.test \
   tripprod.test \
   mixprod.test \
-  spotlbtt.test \
-  ltlmagic.test
+  ltlmagic.test \
+  spotlbtt.test
 
 EXTRA_DIST = $(TESTS)
 

src/tgbatest/explpro2.test

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+. ./defs
+
+set -e
+
+cat >input1 <<EOF
+acc = p1 p2;
+s1, s2, !a, p1;
+s1, s3, !b, p2;
+EOF
+
+cat >input2 <<EOF
+acc = p2 p3;
+s1, s2, b, p2;
+s1, s3, a, p3;
+EOF
+
+cat >expected <<EOF
+acc = "p1" "p2" "p3";
+"s1 * s1", "s2 * s2", ! a b, "p1" "p2";
+"s1 * s1", "s3 * s3", a ! b, "p2" "p3";
+EOF
+
+./explprod input1 input2 > stdout
+
+# Sort out some possible inversions in the output.
+# (The order is not guaranteed by SPOT.)
+sed 's/c a/a c/g;s/b a/a b/g;s/"p3" "p2"/"p2" "p3"/g;s/"p2" "p1"/"p1" "p2"/g' stdout > tmp_ &&
+  mv tmp_ stdout
+
+cat stdout
+diff stdout expected
+rm input1 input2 stdout expected