- Some more work on hidelevel backbone.

- Added '--count-states' switch for the Arachne engine.

src/hidelevel.h

@@ -4,6 +4,17 @@
 #include "term.h"
 #include "system.h"
 
+/*
+ * Flags for hidelevel lemma
+ *
+ * Use binary or (|) to compose results: by default, a term can be satisfied by
+ * both the protocol and the initial knowledge.
+ */
+#define HLFLAG_BOTH 0
+#define HLFLAG_KNOW 1
+#define HLFLAG_PROT 2
+#define HLFLAG_NONE 3
+
 /*
  * The structure hiddenterm/Hiddenterm is defined in system.h
  */