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- Improved pruning.

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This commit is contained in:
ccremers 2004-08-18 19:43:58 +00:00
parent 0f75efc787
commit c95630f93b
2 changed files with 57 additions and 21 deletions
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51
src/arachne.c
View File

@ -25,6 +25,7 @@ extern Term CLAIM_Secret;
extern Term CLAIM_Nisynch;
extern Term CLAIM_Niagree;
extern Term TERM_Agent;
extern Term TERM_Hidden;
static System sys;
Protocol INTRUDER; // Pointers, to be set by the Init
@ -303,8 +304,7 @@ iterate_role_sends (int (*func) ())
*@param subterm determines whether it is a subterm unification or not.
*/
int
bind_existing_to_goal (const Binding b, const int index, const int run,
const int subterm)
bind_existing_to_goal (const Binding b, const int run, const int index)
{
Roledef rd;
int flag;
@ -395,7 +395,7 @@ bind_existing_to_goal (const Binding b, const int index, const int run,
//! Bind a goal to an existing regular run, if possible
int
bind_existing_run (const Binding b, const Protocol p, const Role r,
const int index, const int subterm)
const int index)
{
int run, flag;
@ -409,7 +409,7 @@ bind_existing_run (const Binding b, const Protocol p, const Role r,
termPrint (p->nameterm);
eprintf (", ");
termPrint (r->nameterm);
eprintf (" (%i)\n", subterm);
eprintf ("\n");
}
#endif
flag = 1;
@ -417,7 +417,7 @@ bind_existing_run (const Binding b, const Protocol p, const Role r,
{
if (sys->runs[run].protocol == p && sys->runs[run].role == r)
{
flag = flag && bind_existing_to_goal (b, index, run, subterm);
flag = flag && bind_existing_to_goal (b, run, index);
}
}
return flag;
@ -426,7 +426,7 @@ bind_existing_run (const Binding b, const Protocol p, const Role r,
//! Bind a goal to a new run
int
bind_new_run (const Binding b, const Protocol p, const Role r,
const int index, const int subterm)
const int index)
{
int run;
int flag;
@ -445,10 +445,10 @@ bind_new_run (const Binding b, const Protocol p, const Role r,
termPrint (p->nameterm);
eprintf (", ");
termPrint (r->nameterm);
eprintf (", run %i (subterm:%i)\n", run, subterm);
eprintf (", run %i\n", run);
}
#endif
flag = bind_existing_to_goal (b, index, run, 1);
flag = bind_existing_to_goal (b, run, index);
remove_read_goals (newgoals);
roleInstanceDestroy (sys);
return flag;
@ -548,7 +548,9 @@ select_goal ()
if (!b->done)
{
// We don't care about singular agent variables, so...
if (! (isTermVariable (b->term) && inTermlist (b->term->stype, TERM_Agent)))
if (!
(isTermVariable (b->term)
&& inTermlist (b->term->stype, TERM_Agent)))
{
float cons;
@ -657,7 +659,7 @@ bind_goal_new_encrypt (const Binding b)
rd->next->message = termDuplicate (t2);
rd->next->next->message = termDuplicate (term);
index = 2;
newgoals = add_read_goals (run, 0, index+1);
newgoals = add_read_goals (run, 0, index + 1);
#ifdef DEBUG
if (DEBUGL (3))
{
@ -689,7 +691,7 @@ bind_goal_new_encrypt (const Binding b)
int
bind_goal_new_intruder_run (const Binding b)
{
return (bind_goal_new_m0(b) && bind_goal_new_encrypt(b));
return (bind_goal_new_m0 (b) && bind_goal_new_encrypt (b));
}
//! Bind a regular goal
@ -747,9 +749,9 @@ bind_goal_regular_run (const Binding b)
}
#endif
// Bind to existing run
flag = bind_existing_run (b, p, r, index, 1);
flag = bind_existing_run (b, p, r, index);
// bind to new run
flag = flag && bind_new_run (b, p, r, index, 1);
flag = flag && bind_new_run (b, p, r, index);
return flag;
}
else
@ -772,7 +774,8 @@ bind_goal_regular_run (const Binding b)
// Bind to all possible sends of intruder runs
int bind_goal_old_intruder_run (Binding b)
int
bind_goal_old_intruder_run (Binding b)
{
int run;
int flag;
@ -781,7 +784,7 @@ int bind_goal_old_intruder_run (Binding b)
if (DEBUGL (5))
{
indentPrint ();
eprintf ("Try regular intruder send.\n");
eprintf ("Try existing intruder send.\n");
}
#endif
@ -799,7 +802,7 @@ int bind_goal_old_intruder_run (Binding b)
{
if (rd->type == SEND)
{
flag = flag && bind_existing_to_goal (b, ev, run, 1);
flag = flag && bind_existing_to_goal (b, run, ev);
}
rd = rd->next;
ev++;
@ -836,6 +839,7 @@ int
prune ()
{
Termlist tl;
List bl;
if (indentDepth > 20)
{
@ -919,6 +923,21 @@ prune ()
return 1;
}
// Check for "Hidden" interm goals
bl = sys->bindings;
while (bl != NULL)
{
Binding b;
b = bl->data;
if (termInTerm (b->term, TERM_Hidden))
{
// Prune the state: we can never meet this
return 1;
}
bl = bl->next;
}
return 0;
}

19
src/binding.c
View File

@ -3,6 +3,7 @@
*/
#include "list.h"
#include "role.h"
#include "system.h"
#include "binding.h"
#include "warshall.h"
@ -14,6 +15,9 @@ static System sys;
static int *graph;
static int nodes;
extern Protocol INTRUDER; // The intruder protocol
extern Role I_M; // special role; precedes all other events always
/*
*
* Assist stuff
@ -93,6 +97,7 @@ void
goal_graph_create ()
{
int run, ev;
int last_m;
List bl;
goal_graph_destroy ();
@ -104,6 +109,7 @@ goal_graph_create ()
// Setup run order
run = 0;
last_m = -1; // last I_M run
while (run < sys->maxruns)
{
ev = 1;
@ -113,6 +119,16 @@ goal_graph_create ()
graph[graph_nodes (nodes, run, ev - 1, run, ev)] = 1;
ev++;
}
// Enforce I_M ordering
if (sys->runs[run].protocol == INTRUDER && sys->runs[run].role == I_M)
{
if (last_m != -1)
{
graph[graph_nodes (nodes, last_m, 0, run, 0)] = 1;
}
last_m = run;
}
// Next
run++;
}
// Setup bindings order
@ -232,7 +248,8 @@ goal_add (Term term, const int run, const int ev)
if (run >= sys->maxruns)
error ("Trying to add a goal for a run that does not exist.");
if (ev >= sys->runs[run].step)
error ("Trying to add a goal for an event that is not in the semistate yet.");
error
("Trying to add a goal for an event that is not in the semistate yet.");
#endif
if (realTermTuple (term))
{