add ddnf tests, add facility to solve QF_NRA + QF_UF(and other theories) in joint solver to allow broader use of QF_NRA core

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/tactic/smtlogics/qfufnra_tactic.h

@@ -0,0 +1,31 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    qfufnra_tactic.h
+
+Abstract:
+
+    Tactic for QF_UFNRA
+
+Author:
+
+    Leonardo (leonardo) 2012-02-28
+
+Notes:
+
+--*/
+#ifndef _QFUFNRA_TACTIC_
+#define _QFUFNRA_TACTIC_
+
+#include"params.h"
+class ast_manager;
+class tactic;
+
+tactic * mk_qfufnra_tactic(ast_manager & m, params_ref const & p = params_ref());
+/*
+  ADD_TACTIC("qfufnra", "builtin strategy for solving QF_UNFRA problems.", "mk_qfufnra_tactic(m, p)")
+*/
+
+#endif