re-organize muz_qe into separate units

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

src/muz/transforms/dl_mk_loop_counter.h

@@ -0,0 +1,51 @@
+/*++
+Copyright (c) 2013 Microsoft Corporation
+
+Module Name:
+
+    dl_mk_loop_counter.h
+
+Abstract:
+
+    Add loop counter argument to relations.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2013-03-31
+
+Revision History:
+
+--*/
+#ifndef _DL_MK_LOOP_COUNTER_H_
+#define _DL_MK_LOOP_COUNTER_H_
+
+#include"dl_rule_transformer.h"
+#include"arith_decl_plugin.h"
+
+namespace datalog {
+
+    class mk_loop_counter : public rule_transformer::plugin {
+        ast_manager& m;
+        context&     m_ctx;
+        arith_util   a;
+        func_decl_ref_vector m_refs;
+        obj_map<func_decl, func_decl*> m_new2old;
+        obj_map<func_decl, func_decl*> m_old2new;
+
+        app_ref add_arg(rule_set const& src, rule_set& dst, app* fn, unsigned idx);        
+        app_ref del_arg(app* fn);        
+    public:
+        mk_loop_counter(context & ctx, unsigned priority = 33000);
+        ~mk_loop_counter();
+        
+        rule_set * operator()(rule_set const & source);
+
+        func_decl* get_old(func_decl* f) const { return m_new2old.find(f); }
+
+        rule_set * revert(rule_set const& source);
+    };
+
+};
+
+#endif /* _DL_MK_LOOP_COUNTER_H_ */
+