- Setup main arachne infrastructure.

src/arachne.c

@@ -0,0 +1,16 @@
+/**
+ *@file arachne.c
+ *
+ * Introduces a method for proofs akin to the Athena modelchecker
+ * http://www.ece.cmu.edu/~dawnsong/athena/
+ *
+ */
+
+#include "system.h"
+#include "arachne.h"
+
+//! Main recursive procedure for Arachne
+int
+arachne (const System sys)
+{
+}

src/arachne.h

@@ -0,0 +1,8 @@
+#ifndef ARACHNE
+#define ARACHNE
+
+#include "system.h"
+
+int arachne (const System sys);
+
+#endif

src/main.c

@@ -87,6 +87,8 @@ main (int argc, char **argv)
     arg_file0 (NULL, NULL, "FILE", "input file ('-' for stdin)");
   struct arg_file *outfile = arg_file0 ("o", "output", "FILE",
 					"output file (default is stdout)");
+  struct arg_lit *switch_arachne =
+    arg_lit0 ("a", "arachne", "use Arachne engine");
   struct arg_str *switch_check = arg_str0 (NULL, "check", "CLAIM",
 					   "claim type to check (default is all)");
   struct arg_int *switch_scenario = arg_int0 ("s", "scenario", NULL,
@@ -166,6 +168,7 @@ main (int argc, char **argv)
     switch_echo,
     switch_progress_bar,
 
+    switch_arachne,
     switch_check,
     switch_traversal_method,
     switch_match_method,
@@ -333,8 +336,10 @@ main (int argc, char **argv)
    */
 
   sys = systemInit ();
-  /* select default engine */
+  if (switch_arachne->count > 0)
-  sys->engine = POR_ENGINE;
+    {
+      sys->engine = ARACHNE_ENGINE;
+    }
   /* init compiler for this system */
   compilerInit (sys);
 
@@ -892,7 +897,17 @@ modelCheck (const System sys)
     }
 
   /* modelcheck the system */
-  traverse (sys);
+  switch (sys->engine)
+    {
+    case POR_ENGINE:
+      traverse (sys);
+      break;
+    case ARACHNE_ENGINE:
+      arachne (sys);
+      break;
+    default:
+      error ("Unknown engine type %i.", sys->engine);
+    }
 
   /* clean up any states display */
   if (sys->switchS > 0)

src/system.c

@@ -54,6 +54,7 @@ systemInit ()
   sys->attack = tracebufInit ();
 
   /* switches */
+  sys->engine = POR_ENGINE;	// default is partial ordering engine
   sys->output = ATTACK;		// default is to show the attacks
   sys->porparam = 0;		// multi-purpose parameter
   sys->latex = 0;		// latex output?