Track source span to keep accurate phrase counts

2 files changed, 2255 insertions, 2736 deletions

diff --git a/python/src/sa/_sa.c b/python/src/sa/_sa.c
index 5f42e8ca..dd5ac0f5 100644
--- a/python/src/sa/_sa.c
+++ b/python/src/sa/_sa.c
@@ -1,4 +1,4 @@
-/* Generated by Cython 0.17.1 on Fri Jan  4 19:46:16 2013 */
+/* Generated by Cython 0.17.1 on Fri Jan  4 23:03:37 2013 */
 
 #define PY_SSIZE_T_CLEAN
 #include "Python.h"
@@ -360,7 +360,7 @@ static const char *__pyx_f[] = {
 struct __pyx_obj_3_sa_HieroCachingRuleFactory;
 struct __pyx_obj_3_sa___pyx_scope_struct_9_decode_sentence;
 struct __pyx_obj_3_sa___pyx_scope_struct_17_genexpr;
-struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule;
+struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule;
 struct __pyx_obj_3_sa___pyx_scope_struct_3_compute_stats;
 struct __pyx_obj_3_sa___pyx_scope_struct_12_genexpr;
 struct __pyx_obj_3_sa___pyx_scope_struct_22_genexpr;
@@ -603,14 +603,14 @@ struct __pyx_obj_3_sa___pyx_scope_struct_17_genexpr {
 };
 
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2130
- *         return rules
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2033
  * 
- *     def new_rule(self, f_sym, e_sym, links):             # <<<<<<<<<<<<<<
- *         f = Phrase(f_sym)
- *         e = Phrase(e_sym)
+ *     # Create a rule from source, target, non-terminals, and alignments
+ *     def form_rule(self, f_i, e_i, f_span, e_span, nt, al):             # <<<<<<<<<<<<<<
+ * 
+ *         # Handle non-terminals
  */
-struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule {
+struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule {
   PyObject_HEAD
   PyObject *__pyx_v_links;
   struct __pyx_obj_3_sa_HieroCachingRuleFactory *__pyx_v_self;
@@ -665,16 +665,16 @@ struct __pyx_obj_3_sa___pyx_scope_struct_12_genexpr {
 };
 
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2133
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2090
  *         f = Phrase(f_sym)
  *         e = Phrase(e_sym)
  *         a = tuple(self.alignment.link(i, j) for (i, j) in links)             # <<<<<<<<<<<<<<
- *         return (f, e, a)
+ *         return (f, e, a, f_link_min, f_link_max)
  * 
  */
 struct __pyx_obj_3_sa___pyx_scope_struct_22_genexpr {
   PyObject_HEAD
-  struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule *__pyx_outer_scope;
+  struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule *__pyx_outer_scope;
   PyObject *__pyx_v_i;
   PyObject *__pyx_v_j;
   PyObject *__pyx_t_0;
@@ -1010,9 +1010,9 @@ struct __pyx_obj_3_sa___pyx_scope_struct_15___iter__ {
 };
 
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2136
- *         return (f, e, a)
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2094
  * 
+ *     # Rule string from rule
  *     def fmt_rule(self, f, e, a):             # <<<<<<<<<<<<<<
  *         a_str = ' '.join('{0}-{1}'.format(*self.alignment.unlink(packed)) for packed in a)
  *         return '[X] ||| {0} ||| {1} ||| {2}'.format(f, e, a_str)
@@ -1024,8 +1024,8 @@ struct __pyx_obj_3_sa___pyx_scope_struct_23_fmt_rule {
 };
 
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2137
- * 
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2095
+ *     # Rule string from rule
  *     def fmt_rule(self, f, e, a):
  *         a_str = ' '.join('{0}-{1}'.format(*self.alignment.unlink(packed)) for packed in a)             # <<<<<<<<<<<<<<
  *         return '[X] ||| {0} ||| {1} ||| {2}'.format(f, e, a_str)
@@ -2371,7 +2371,7 @@ static PyTypeObject *__pyx_ptype_3_sa___pyx_scope_struct_17_genexpr = 0;
 static PyTypeObject *__pyx_ptype_3_sa___pyx_scope_struct_18_alignments = 0;
 static PyTypeObject *__pyx_ptype_3_sa___pyx_scope_struct_19_input = 0;
 static PyTypeObject *__pyx_ptype_3_sa___pyx_scope_struct_20_add_instance = 0;
-static PyTypeObject *__pyx_ptype_3_sa___pyx_scope_struct_21_new_rule = 0;
+static PyTypeObject *__pyx_ptype_3_sa___pyx_scope_struct_21_form_rule = 0;
 static PyTypeObject *__pyx_ptype_3_sa___pyx_scope_struct_22_genexpr = 0;
 static PyTypeObject *__pyx_ptype_3_sa___pyx_scope_struct_23_fmt_rule = 0;
 static PyTypeObject *__pyx_ptype_3_sa___pyx_scope_struct_24_genexpr = 0;
@@ -2648,12 +2648,11 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
 static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_25add_instance(struct __pyx_obj_3_sa_HieroCachingRuleFactory *__pyx_v_self, PyObject *__pyx_v_f_words, PyObject *__pyx_v_e_words, PyObject *__pyx_v_alignment); /* proto */
 static PyObject *__pyx_lambda_funcdef_lambda7(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_x, PyObject *__pyx_v_y); /* proto */
 static PyObject *__pyx_lambda_funcdef_lambda8(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_x, PyObject *__pyx_v_y); /* proto */
-static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_27form_rules(struct __pyx_obj_3_sa_HieroCachingRuleFactory *__pyx_v_self, PyObject *__pyx_v_f_i, PyObject *__pyx_v_e_i, PyObject *__pyx_v_f_span, PyObject *__pyx_v_e_span, PyObject *__pyx_v_nt, PyObject *__pyx_v_al); /* proto */
-static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_8new_rule_genexpr(PyObject *__pyx_self); /* proto */
-static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_29new_rule(struct __pyx_obj_3_sa_HieroCachingRuleFactory *__pyx_v_self, PyObject *__pyx_v_f_sym, PyObject *__pyx_v_e_sym, PyObject *__pyx_v_links); /* proto */
+static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_9form_rule_2genexpr(PyObject *__pyx_self); /* proto */
+static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_27form_rule(struct __pyx_obj_3_sa_HieroCachingRuleFactory *__pyx_v_self, PyObject *__pyx_v_f_i, PyObject *__pyx_v_e_i, PyObject *__pyx_v_f_span, PyObject *__pyx_v_e_span, PyObject *__pyx_v_nt, PyObject *__pyx_v_al); /* proto */
 static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_8fmt_rule_genexpr(PyObject *__pyx_self); /* proto */
-static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_31fmt_rule(struct __pyx_obj_3_sa_HieroCachingRuleFactory *__pyx_v_self, PyObject *__pyx_v_f, PyObject *__pyx_v_e, PyObject *__pyx_v_a); /* proto */
-static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_33dump_online_stats(struct __pyx_obj_3_sa_HieroCachingRuleFactory *__pyx_v_self); /* proto */
+static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_29fmt_rule(struct __pyx_obj_3_sa_HieroCachingRuleFactory *__pyx_v_self, PyObject *__pyx_v_f, PyObject *__pyx_v_e, PyObject *__pyx_v_a); /* proto */
+static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_31dump_online_stats(struct __pyx_obj_3_sa_HieroCachingRuleFactory *__pyx_v_self); /* proto */
 static PyObject *__pyx_pf_3_sa_12span_check(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_vec, PyObject *__pyx_v_i, PyObject *__pyx_v_j); /* proto */
 static PyObject *__pyx_pf_3_sa_14span_inc(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_vec, PyObject *__pyx_v_i, PyObject *__pyx_v_j); /* proto */
 static PyObject *__pyx_pf_3_sa_16span_dec(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_vec, PyObject *__pyx_v_i, PyObject *__pyx_v_j); /* proto */
@@ -2812,7 +2811,6 @@ static char __pyx_k__link[] = "link";
 static char __pyx_k__meta[] = "meta";
 static char __pyx_k__name[] = "name";
 static char __pyx_k__open[] = "open";
-static char __pyx_k__rule[] = "rule";
 static char __pyx_k__seek[] = "seek";
 static char __pyx_k__side[] = "side";
 static char __pyx_k__size[] = "size";
@@ -2825,9 +2823,7 @@ static char __pyx_k___SEP_[] = "_SEP_";
 static char __pyx_k__arity[] = "arity";
 static char __pyx_k__chain[] = "chain";
 static char __pyx_k__debug[] = "debug";
-static char __pyx_k__e_sym[] = "e_sym";
 static char __pyx_k__eword[] = "eword";
-static char __pyx_k__f_sym[] = "f_sym";
 static char __pyx_k__fword[] = "fword";
 static char __pyx_k__ifrom[] = "ifrom";
 static char __pyx_k__index[] = "index";
@@ -2909,7 +2905,6 @@ static char __pyx_k__get_f_id[] = "get_f_id";
 static char __pyx_k__get_word[] = "get_word";
 static char __pyx_k__getchunk[] = "getchunk";
 static char __pyx_k__min_dist[] = "min_dist";
-static char __pyx_k__new_rule[] = "new_rule";
 static char __pyx_k__resource[] = "resource";
 static char __pyx_k__ru_stime[] = "ru_stime";
 static char __pyx_k__ru_utime[] = "ru_utime";
@@ -2923,6 +2918,7 @@ static char __pyx_k__TypeError[] = "TypeError";
 static char __pyx_k____enter__[] = "__enter__";
 static char __pyx_k__alignment[] = "alignment";
 static char __pyx_k__enumerate[] = "enumerate";
+static char __pyx_k__form_rule[] = "form_rule";
 static char __pyx_k__from_data[] = "from_data";
 static char __pyx_k__from_text[] = "from_text";
 static char __pyx_k__getLogger[] = "getLogger";
@@ -2938,7 +2934,6 @@ static char __pyx_k__read_text[] = "read_text";
 static char __pyx_k__use_index[] = "use_index";
 static char __pyx_k__IndexError[] = "IndexError";
 static char __pyx_k__alignments[] = "alignments";
-static char __pyx_k__form_rules[] = "form_rules";
 static char __pyx_k__from_stats[] = "from_stats";
 static char __pyx_k__input_span[] = "input_span";
 static char __pyx_k__itervalues[] = "itervalues";
@@ -3149,7 +3144,6 @@ static PyObject *__pyx_n_s__e;
 static PyObject *__pyx_n_s__e_i;
 static PyObject *__pyx_n_s__e_j;
 static PyObject *__pyx_n_s__e_span;
-static PyObject *__pyx_n_s__e_sym;
 static PyObject *__pyx_n_s__e_text;
 static PyObject *__pyx_n_s__e_words;
 static PyObject *__pyx_n_s__earray;
@@ -3166,14 +3160,13 @@ static PyObject *__pyx_n_s__f;
 static PyObject *__pyx_n_s__f_i;
 static PyObject *__pyx_n_s__f_j;
 static PyObject *__pyx_n_s__f_span;
-static PyObject *__pyx_n_s__f_sym;
 static PyObject *__pyx_n_s__f_text;
 static PyObject *__pyx_n_s__f_words;
 static PyObject *__pyx_n_s__fcount;
 static PyObject *__pyx_n_s__fe;
 static PyObject *__pyx_n_s__filename;
 static PyObject *__pyx_n_s__fmt_rule;
-static PyObject *__pyx_n_s__form_rules;
+static PyObject *__pyx_n_s__form_rule;
 static PyObject *__pyx_n_s__format;
 static PyObject *__pyx_n_s__fphrase;
 static PyObject *__pyx_n_s__from_binary;
@@ -3248,7 +3241,6 @@ static PyObject *__pyx_n_s__namedtuple;
 static PyObject *__pyx_n_s__new_e_i;
 static PyObject *__pyx_n_s__new_e_j;
 static PyObject *__pyx_n_s__new_min_bound;
-static PyObject *__pyx_n_s__new_rule;
 static PyObject *__pyx_n_s__next_states;
 static PyObject *__pyx_n_s__nt;
 static PyObject *__pyx_n_s__nt_collision;
@@ -3284,7 +3276,6 @@ static PyObject *__pyx_n_s__reset;
 static PyObject *__pyx_n_s__resource;
 static PyObject *__pyx_n_s__ru_stime;
 static PyObject *__pyx_n_s__ru_utime;
-static PyObject *__pyx_n_s__rule;
 static PyObject *__pyx_n_s__sa;
 static PyObject *__pyx_n_s__sa_high;
 static PyObject *__pyx_n_s__sa_low;
@@ -56912,46 +56903,46 @@ static PyObject *__pyx_pw_3_sa_23HieroCachingRuleFactory_12add_instance_1extract
         case  1:
         if (likely((values[1] = PyDict_GetItem(__pyx_kwds, __pyx_n_s__f_j)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 1); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 1); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
         }
         case  2:
         if (likely((values[2] = PyDict_GetItem(__pyx_kwds, __pyx_n_s__e_i)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 2); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 2); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
         }
         case  3:
         if (likely((values[3] = PyDict_GetItem(__pyx_kwds, __pyx_n_s__e_j)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 3); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 3); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
         }
         case  4:
         if (likely((values[4] = PyDict_GetItem(__pyx_kwds, __pyx_n_s__min_bound)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 4); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 4); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
         }
         case  5:
         if (likely((values[5] = PyDict_GetItem(__pyx_kwds, __pyx_n_s__wc)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 5); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 5); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
         }
         case  6:
         if (likely((values[6] = PyDict_GetItem(__pyx_kwds, __pyx_n_s__links)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 6); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 6); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
         }
         case  7:
         if (likely((values[7] = PyDict_GetItem(__pyx_kwds, __pyx_n_s__nt)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 7); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 7); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
         }
         case  8:
         if (likely((values[8] = PyDict_GetItem(__pyx_kwds, __pyx_n_s__nt_open)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 8); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+          __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, 8); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
         }
       }
       if (unlikely(kw_args > 0)) {
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "extract") < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "extract") < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
       }
     } else if (PyTuple_GET_SIZE(__pyx_args) != 9) {
       goto __pyx_L5_argtuple_error;
@@ -56978,7 +56969,7 @@ static PyObject *__pyx_pw_3_sa_23HieroCachingRuleFactory_12add_instance_1extract
   }
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, PyTuple_GET_SIZE(__pyx_args)); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
+  __Pyx_RaiseArgtupleInvalid("extract", 1, 9, 9, PyTuple_GET_SIZE(__pyx_args)); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
   __pyx_L3_error:;
   __Pyx_AddTraceback("_sa.HieroCachingRuleFactory.add_instance.extract", __pyx_clineno, __pyx_lineno, __pyx_filename);
   __Pyx_RefNannyFinishContext();
@@ -56989,7 +56980,7 @@ static PyObject *__pyx_pw_3_sa_23HieroCachingRuleFactory_12add_instance_1extract
   return __pyx_r;
 }
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1856
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1860
  *         # Extract all possible hierarchical phrases starting at a source index
  *         # f_ i and j are current, e_ i and j are previous
  *         def extract(f_i, f_j, e_i, e_j, min_bound, wc, links, nt, nt_open):             # <<<<<<<<<<<<<<
@@ -57007,7 +56998,6 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
   PyObject *__pyx_v_new_min_bound = NULL;
   PyObject *__pyx_v_i = NULL;
   PyObject *__pyx_v_old_last_nt = NULL;
-  PyObject *__pyx_v_rule = NULL;
   int __pyx_v_nt_collision;
   PyObject *__pyx_v_link = NULL;
   PyObject *__pyx_v_plus_links = NULL;
@@ -57026,8 +57016,9 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
   int __pyx_t_11;
   int __pyx_t_12;
   Py_ssize_t __pyx_t_13;
-  PyObject *(*__pyx_t_14)(PyObject *);
-  int __pyx_t_15;
+  PyObject *__pyx_t_14 = NULL;
+  PyObject *(*__pyx_t_15)(PyObject *);
+  int __pyx_t_16;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
@@ -57035,55 +57026,55 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
   __pyx_outer_scope = (struct __pyx_obj_3_sa___pyx_scope_struct_20_add_instance *) __Pyx_CyFunction_GetClosure(__pyx_self);
   __pyx_cur_scope = __pyx_outer_scope;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1858
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1862
  *         def extract(f_i, f_j, e_i, e_j, min_bound, wc, links, nt, nt_open):
  *             # Phrase extraction limits
  *             if wc + len(nt) > self.max_length or (f_j + 1) > f_len or \             # <<<<<<<<<<<<<<
  *                     (f_j - f_i) + 1 > self.max_initial_size:
  *                 return
  */
-  __pyx_t_1 = PyObject_Length(__pyx_v_nt); if (unlikely(__pyx_t_1 == -1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1858; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_t_2 = PyInt_FromSsize_t(__pyx_t_1); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1858; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = PyObject_Length(__pyx_v_nt); if (unlikely(__pyx_t_1 == -1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1862; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-      /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1867
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-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1869
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-      /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1870
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-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1871
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1874
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1875
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1876
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+  __pyx_t_2 = PyObject_RichCompare(__pyx_t_4, __pyx_t_3, Py_GT); __Pyx_XGOTREF(__pyx_t_2); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1880; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1879
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-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1882
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-        /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1910
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-        /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1911
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+      __pyx_t_2 = __Pyx_GetItemInt(__pyx_t_4, 4, sizeof(long), PyInt_FromLong); if (!__pyx_t_2) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1931; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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+      __pyx_t_4 = PyNumber_Add(__pyx_t_2, __pyx_int_1); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1931; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-      __pyx_t_2 = PyTuple_New(3); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1928; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_2 = PyTuple_New(3); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1931; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(__pyx_t_2);
       __Pyx_INCREF(__pyx_cur_scope->__pyx_v_e_nt_cover);
       PyTuple_SET_ITEM(__pyx_t_2, 0, __pyx_cur_scope->__pyx_v_e_nt_cover);
@@ -58441,16 +58384,16 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
       PyTuple_SET_ITEM(__pyx_t_2, 2, __pyx_v_link_j);
       __Pyx_GIVEREF(__pyx_v_link_j);
       __pyx_t_4 = 0;
-      __pyx_t_4 = PyObject_Call(__pyx_t_3, ((PyObject *)__pyx_t_2), NULL); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1928; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_4 = PyObject_Call(__pyx_t_14, ((PyObject *)__pyx_t_2), NULL); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1931; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(__pyx_t_4);
-      __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
+      __Pyx_DECREF(__pyx_t_14); __pyx_t_14 = 0;
       __Pyx_DECREF(((PyObject *)__pyx_t_2)); __pyx_t_2 = 0;
       __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
-      goto __pyx_L27;
+      goto __pyx_L25;
     }
-    __pyx_L27:;
+    __pyx_L25:;
 
-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1929
+    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1932
  *                     span_dec(cover, nt[-1][4] + 1, link_j)
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@@ -58464,7 +58407,7 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
   }
   __pyx_L17:;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1932
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1935
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  *             # Extract, extend with word
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@@ -58473,45 +58416,45 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
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   __pyx_v_nt_collision = 0;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1933
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1936
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  *             nt_collision = False
  *             for link in al[f_j]:             # <<<<<<<<<<<<<<
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-  __pyx_t_4 = PyObject_GetItem(__pyx_cur_scope->__pyx_v_al, __pyx_v_f_j); if (!__pyx_t_4) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1933; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_4 = PyObject_GetItem(__pyx_cur_scope->__pyx_v_al, __pyx_v_f_j); if (!__pyx_t_4) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1936; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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     __pyx_t_2 = __pyx_t_4; __Pyx_INCREF(__pyx_t_2); __pyx_t_1 = 0;
-    __pyx_t_14 = NULL;
+    __pyx_t_15 = NULL;
   } else {
-    __pyx_t_1 = -1; __pyx_t_2 = PyObject_GetIter(__pyx_t_4); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1933; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __pyx_t_1 = -1; __pyx_t_2 = PyObject_GetIter(__pyx_t_4); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1936; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     __Pyx_GOTREF(__pyx_t_2);
-    __pyx_t_14 = Py_TYPE(__pyx_t_2)->tp_iternext;
+    __pyx_t_15 = Py_TYPE(__pyx_t_2)->tp_iternext;
   }
   __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
   for (;;) {
-    if (!__pyx_t_14 && PyList_CheckExact(__pyx_t_2)) {
+    if (!__pyx_t_15 && PyList_CheckExact(__pyx_t_2)) {
       if (__pyx_t_1 >= PyList_GET_SIZE(__pyx_t_2)) break;
       #if CYTHON_COMPILING_IN_CPYTHON
-      __pyx_t_4 = PyList_GET_ITEM(__pyx_t_2, __pyx_t_1); __Pyx_INCREF(__pyx_t_4); __pyx_t_1++; if (unlikely(0 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1933; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_4 = PyList_GET_ITEM(__pyx_t_2, __pyx_t_1); __Pyx_INCREF(__pyx_t_4); __pyx_t_1++; if (unlikely(0 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1936; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-      __pyx_t_4 = PySequence_ITEM(__pyx_t_2, __pyx_t_1); __pyx_t_1++; if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1933; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_4 = PySequence_ITEM(__pyx_t_2, __pyx_t_1); __pyx_t_1++; if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1936; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       #endif
-    } else if (!__pyx_t_14 && PyTuple_CheckExact(__pyx_t_2)) {
+    } else if (!__pyx_t_15 && PyTuple_CheckExact(__pyx_t_2)) {
       if (__pyx_t_1 >= PyTuple_GET_SIZE(__pyx_t_2)) break;
       #if CYTHON_COMPILING_IN_CPYTHON
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+      __pyx_t_4 = PyTuple_GET_ITEM(__pyx_t_2, __pyx_t_1); __Pyx_INCREF(__pyx_t_4); __pyx_t_1++; if (unlikely(0 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1936; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-      __pyx_t_4 = PySequence_ITEM(__pyx_t_2, __pyx_t_1); __pyx_t_1++; if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1933; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_4 = PySequence_ITEM(__pyx_t_2, __pyx_t_1); __pyx_t_1++; if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1936; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       #endif
     } else {
-      __pyx_t_4 = __pyx_t_14(__pyx_t_2);
+      __pyx_t_4 = __pyx_t_15(__pyx_t_2);
       if (unlikely(!__pyx_t_4)) {
         if (PyErr_Occurred()) {
           if (likely(PyErr_ExceptionMatches(PyExc_StopIteration))) PyErr_Clear();
-          else {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1933; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+          else {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1936; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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@@ -58521,21 +58464,21 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
     __pyx_v_link = __pyx_t_4;
     __pyx_t_4 = 0;
 
-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1934
+    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1937
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  *             for link in al[f_j]:
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-    if (unlikely(!__pyx_cur_scope->__pyx_v_e_nt_cover)) { __Pyx_RaiseClosureNameError("e_nt_cover"); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1934; __pyx_clineno = __LINE__; goto __pyx_L1_error;} }
-    __pyx_t_4 = PyObject_GetItem(__pyx_cur_scope->__pyx_v_e_nt_cover, __pyx_v_link); if (!__pyx_t_4) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1934; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    if (unlikely(!__pyx_cur_scope->__pyx_v_e_nt_cover)) { __Pyx_RaiseClosureNameError("e_nt_cover"); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1937; __pyx_clineno = __LINE__; goto __pyx_L1_error;} }
+    __pyx_t_4 = PyObject_GetItem(__pyx_cur_scope->__pyx_v_e_nt_cover, __pyx_v_link); if (!__pyx_t_4) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1937; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     __Pyx_GOTREF(__pyx_t_4);
-    __pyx_t_5 = __Pyx_PyObject_IsTrue(__pyx_t_4); if (unlikely(__pyx_t_5 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1934; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __pyx_t_5 = __Pyx_PyObject_IsTrue(__pyx_t_4); if (unlikely(__pyx_t_5 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1937; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
     if (__pyx_t_5) {
 
-      /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1935
+      /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1938
  *             for link in al[f_j]:
  *                 if e_nt_cover[link]:
  *                     nt_collision = True             # <<<<<<<<<<<<<<
@@ -58543,13 +58486,13 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
  *             # may be okay for continuing non-terminals
  */
       __pyx_v_nt_collision = 1;
-      goto __pyx_L30;
+      goto __pyx_L28;
     }
-    __pyx_L30:;
+    __pyx_L28:;
   }
   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1938
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1941
  *             # Non-terminal collisions block word extraction and extension, but
  *             # may be okay for continuing non-terminals
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   if (__pyx_t_5) {
 
-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1939
+    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1942
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  *             if not nt_collision:
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  *                 for link in al[f_j]:
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-    __pyx_t_2 = PyList_New(0); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1939; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __pyx_t_2 = PyList_New(0); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1942; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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     __pyx_v_plus_links = __pyx_t_2;
     __pyx_t_2 = 0;
 
-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1940
+    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1943
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  *                 for link in al[f_j]:             # <<<<<<<<<<<<<<
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-    __pyx_t_2 = PyObject_GetItem(__pyx_cur_scope->__pyx_v_al, __pyx_v_f_j); if (!__pyx_t_2) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1940; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __pyx_t_2 = PyObject_GetItem(__pyx_cur_scope->__pyx_v_al, __pyx_v_f_j); if (!__pyx_t_2) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1943; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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     if (PyList_CheckExact(__pyx_t_2) || PyTuple_CheckExact(__pyx_t_2)) {
       __pyx_t_4 = __pyx_t_2; __Pyx_INCREF(__pyx_t_4); __pyx_t_1 = 0;
-      __pyx_t_14 = NULL;
+      __pyx_t_15 = NULL;
     } else {
-      __pyx_t_1 = -1; __pyx_t_4 = PyObject_GetIter(__pyx_t_2); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1940; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_1 = -1; __pyx_t_4 = PyObject_GetIter(__pyx_t_2); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1943; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(__pyx_t_4);
-      __pyx_t_14 = Py_TYPE(__pyx_t_4)->tp_iternext;
+      __pyx_t_15 = Py_TYPE(__pyx_t_4)->tp_iternext;
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     __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
     for (;;) {
-      if (!__pyx_t_14 && PyList_CheckExact(__pyx_t_4)) {
+      if (!__pyx_t_15 && PyList_CheckExact(__pyx_t_4)) {
         if (__pyx_t_1 >= PyList_GET_SIZE(__pyx_t_4)) break;
         #if CYTHON_COMPILING_IN_CPYTHON
-        __pyx_t_2 = PyList_GET_ITEM(__pyx_t_4, __pyx_t_1); __Pyx_INCREF(__pyx_t_2); __pyx_t_1++; if (unlikely(0 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1940; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+        __pyx_t_2 = PyList_GET_ITEM(__pyx_t_4, __pyx_t_1); __Pyx_INCREF(__pyx_t_2); __pyx_t_1++; if (unlikely(0 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1943; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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+        __pyx_t_2 = PySequence_ITEM(__pyx_t_4, __pyx_t_1); __pyx_t_1++; if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1943; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
         #endif
-      } else if (!__pyx_t_14 && PyTuple_CheckExact(__pyx_t_4)) {
+      } else if (!__pyx_t_15 && PyTuple_CheckExact(__pyx_t_4)) {
         if (__pyx_t_1 >= PyTuple_GET_SIZE(__pyx_t_4)) break;
         #if CYTHON_COMPILING_IN_CPYTHON
-        __pyx_t_2 = PyTuple_GET_ITEM(__pyx_t_4, __pyx_t_1); __Pyx_INCREF(__pyx_t_2); __pyx_t_1++; if (unlikely(0 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1940; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+        __pyx_t_2 = PyTuple_GET_ITEM(__pyx_t_4, __pyx_t_1); __Pyx_INCREF(__pyx_t_2); __pyx_t_1++; if (unlikely(0 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1943; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
         #else
-        __pyx_t_2 = PySequence_ITEM(__pyx_t_4, __pyx_t_1); __pyx_t_1++; if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1940; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+        __pyx_t_2 = PySequence_ITEM(__pyx_t_4, __pyx_t_1); __pyx_t_1++; if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1943; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
         #endif
       } else {
-        __pyx_t_2 = __pyx_t_14(__pyx_t_4);
+        __pyx_t_2 = __pyx_t_15(__pyx_t_4);
         if (unlikely(!__pyx_t_2)) {
           if (PyErr_Occurred()) {
             if (likely(PyErr_ExceptionMatches(PyExc_StopIteration))) PyErr_Clear();
-            else {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1940; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+            else {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1943; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
           }
           break;
         }
@@ -58619,14 +58562,14 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
       __pyx_v_link = __pyx_t_2;
       __pyx_t_2 = 0;
 
-      /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1941
+      /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1944
  *                 plus_links = []
  *                 for link in al[f_j]:
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  *                 links.append(plus_links)
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-      __pyx_t_2 = PyTuple_New(2); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1941; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_2 = PyTuple_New(2); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1944; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(__pyx_t_2);
       __Pyx_INCREF(__pyx_v_f_j);
       PyTuple_SET_ITEM(__pyx_t_2, 0, __pyx_v_f_j);
@@ -58634,10 +58577,10 @@ static PyObject *__pyx_pf_3_sa_23HieroCachingRuleFactory_12add_instance_extract(
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       PyTuple_SET_ITEM(__pyx_t_2, 1, __pyx_v_link);
       __Pyx_GIVEREF(__pyx_v_link);
-      __pyx_t_15 = PyList_Append(__pyx_v_plus_links, ((PyObject *)__pyx_t_2)); if (unlikely(__pyx_t_15 == -1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1941; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_16 = PyList_Append(__pyx_v_plus_links, ((PyObject *)__pyx_t_2)); if (unlikely(__pyx_t_16 == -1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1944; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_DECREF(((PyObject *)__pyx_t_2)); __pyx_t_2 = 0;
 
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-    __Pyx_GOTREF(__pyx_t_9);
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-    __Pyx_DECREF(__pyx_t_9); __pyx_t_9 = 0;
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-    __Pyx_GOTREF(__pyx_t_4);
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-    __Pyx_GOTREF(__pyx_t_9);
-    __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
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+    __Pyx_GOTREF(__pyx_t_4);
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-    __Pyx_DECREF(__pyx_t_9); __pyx_t_9 = 0;
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   __Pyx_XDECREF(__pyx_t_4);
   __Pyx_XDECREF(__pyx_t_9);
+  __Pyx_XDECREF(__pyx_t_14);
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-  int __pyx_t_12;
-  Py_ssize_t __pyx_t_13;
-  PyObject *(*__pyx_t_14)(PyObject *);
+  Py_ssize_t __pyx_t_12;
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1832
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- *         # Rules extracted from this instance
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+  __Pyx_RaiseArgtupleInvalid("fmt_rule", 1, 3, 3, PyTuple_GET_SIZE(__pyx_args)); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2094; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
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+  __pyx_r = __pyx_pf_3_sa_23HieroCachingRuleFactory_29fmt_rule(((struct __pyx_obj_3_sa_HieroCachingRuleFactory *)__pyx_v_self), __pyx_v_f, __pyx_v_e, __pyx_v_a);
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-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2137
- * 
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2095
+ *     # Rule string from rule
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+    __pyx_GeneratorObject *gen = __Pyx_Generator_New((__pyx_generator_body_t) __pyx_gb_3_sa_23HieroCachingRuleFactory_8fmt_rule_2generator15, (PyObject *) __pyx_cur_scope); if (unlikely(!gen)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2095; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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+    __pyx_t_2 = -1; __pyx_t_1 = PyObject_GetIter(__pyx_cur_scope->__pyx_outer_scope->__pyx_v_a); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2095; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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+      __pyx_t_4 = PySequence_ITEM(__pyx_t_1, __pyx_t_2); __pyx_t_2++; if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2095; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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+    __pyx_t_6 = PyTuple_New(1); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2095; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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 }
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2136
- *         return (f, e, a)
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2094
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2137
- * 
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2095
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+  __pyx_t_2 = PyObject_Call(__pyx_t_1, ((PyObject *)__pyx_t_3), NULL); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2095; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2138
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2151
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2152
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-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2153
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-      /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2154
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2155
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2158
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2116
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2159
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2162
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-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2163
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+          __Pyx_RaiseArgtupleInvalid("span_inc", 1, 3, 3, 2); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2133; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
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+  __Pyx_RaiseArgtupleInvalid("span_inc", 1, 3, 3, PyTuple_GET_SIZE(__pyx_args)); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2133; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
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-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2175
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2176
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2177
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+    __pyx_t_2 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely(__pyx_t_2 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2135; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2178
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-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2179
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+          __Pyx_RaiseArgtupleInvalid("span_dec", 1, 3, 3, 1); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
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+          __Pyx_RaiseArgtupleInvalid("span_dec", 1, 3, 3, 2); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
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+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "span_dec") < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
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+  __Pyx_RaiseArgtupleInvalid("span_dec", 1, 3, 3, PyTuple_GET_SIZE(__pyx_args)); {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
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-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2181
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2182
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2183
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+    __pyx_t_1 = PyObject_RichCompare(__pyx_v_k, __pyx_v_j, Py_LE); __Pyx_XGOTREF(__pyx_t_1); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2141; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __pyx_t_2 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely(__pyx_t_2 < 0)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2141; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2184
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+    if (PyObject_SetItem(__pyx_v_vec, __pyx_t_1, __pyx_t_4) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2142; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2185
+    /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2143
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-    __pyx_t_1 = PyNumber_InPlaceAdd(__pyx_v_k, __pyx_int_1); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2185; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __pyx_t_1 = PyNumber_InPlaceAdd(__pyx_v_k, __pyx_int_1); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2143; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  {__Pyx_NAMESTR("dump_online_stats"), (PyCFunction)__pyx_pw_3_sa_23HieroCachingRuleFactory_34dump_online_stats, METH_NOARGS, __Pyx_DOCSTR(0)},
+  {__Pyx_NAMESTR("form_rule"), (PyCFunction)__pyx_pw_3_sa_23HieroCachingRuleFactory_28form_rule, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(0)},
+  {__Pyx_NAMESTR("fmt_rule"), (PyCFunction)__pyx_pw_3_sa_23HieroCachingRuleFactory_30fmt_rule, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(0)},
+  {__Pyx_NAMESTR("dump_online_stats"), (PyCFunction)__pyx_pw_3_sa_23HieroCachingRuleFactory_32dump_online_stats, METH_NOARGS, __Pyx_DOCSTR(0)},
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-  p = ((struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule *)o);
+  p = ((struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule *)o);
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-  struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule *p = (struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule *)o;
+static void __pyx_tp_dealloc_3_sa___pyx_scope_struct_21_form_rule(PyObject *o) {
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 }
 
-static int __pyx_tp_traverse_3_sa___pyx_scope_struct_21_new_rule(PyObject *o, visitproc v, void *a) {
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-  struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule *p = (struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule *)o;
+  struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule *p = (struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule *)o;
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@@ -76175,8 +75743,8 @@ static int __pyx_tp_traverse_3_sa___pyx_scope_struct_21_new_rule(PyObject *o, vi
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 }
 
-static int __pyx_tp_clear_3_sa___pyx_scope_struct_21_new_rule(PyObject *o) {
-  struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule *p = (struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule *)o;
+static int __pyx_tp_clear_3_sa___pyx_scope_struct_21_form_rule(PyObject *o) {
+  struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule *p = (struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule *)o;
   PyObject* tmp;
   tmp = ((PyObject*)p->__pyx_v_links);
   p->__pyx_v_links = Py_None; Py_INCREF(Py_None);
@@ -76187,11 +75755,11 @@ static int __pyx_tp_clear_3_sa___pyx_scope_struct_21_new_rule(PyObject *o) {
   return 0;
 }
 
-static PyMethodDef __pyx_methods_3_sa___pyx_scope_struct_21_new_rule[] = {
+static PyMethodDef __pyx_methods_3_sa___pyx_scope_struct_21_form_rule[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_21_new_rule = {
+static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_21_form_rule = {
   0, /*nb_add*/
   0, /*nb_subtract*/
   0, /*nb_multiply*/
@@ -76249,7 +75817,7 @@ static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_21_new_rule = {
   #endif
 };
 
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_21_new_rule = {
+static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_21_form_rule = {
   0, /*sq_length*/
   0, /*sq_concat*/
   0, /*sq_repeat*/
@@ -76262,13 +75830,13 @@ static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_21_new_rule = {
   0, /*sq_inplace_repeat*/
 };
 
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_21_new_rule = {
+static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_21_form_rule = {
   0, /*mp_length*/
   0, /*mp_subscript*/
   0, /*mp_ass_subscript*/
 };
 
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_21_new_rule = {
+static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_21_form_rule = {
   #if PY_MAJOR_VERSION < 3
   0, /*bf_getreadbuffer*/
   #endif
@@ -76289,12 +75857,12 @@ static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_21_new_rule = {
   #endif
 };
 
-static PyTypeObject __pyx_type_3_sa___pyx_scope_struct_21_new_rule = {
+static PyTypeObject __pyx_type_3_sa___pyx_scope_struct_21_form_rule = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_sa.__pyx_scope_struct_21_new_rule"), /*tp_name*/
-  sizeof(struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule), /*tp_basicsize*/
+  __Pyx_NAMESTR("_sa.__pyx_scope_struct_21_form_rule"), /*tp_name*/
+  sizeof(struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_3_sa___pyx_scope_struct_21_new_rule, /*tp_dealloc*/
+  __pyx_tp_dealloc_3_sa___pyx_scope_struct_21_form_rule, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -76304,24 +75872,24 @@ static PyTypeObject __pyx_type_3_sa___pyx_scope_struct_21_new_rule = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_21_new_rule, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_21_new_rule, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_21_new_rule, /*tp_as_mapping*/
+  &__pyx_tp_as_number___pyx_scope_struct_21_form_rule, /*tp_as_number*/
+  &__pyx_tp_as_sequence___pyx_scope_struct_21_form_rule, /*tp_as_sequence*/
+  &__pyx_tp_as_mapping___pyx_scope_struct_21_form_rule, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_21_new_rule, /*tp_as_buffer*/
+  &__pyx_tp_as_buffer___pyx_scope_struct_21_form_rule, /*tp_as_buffer*/
   Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_3_sa___pyx_scope_struct_21_new_rule, /*tp_traverse*/
-  __pyx_tp_clear_3_sa___pyx_scope_struct_21_new_rule, /*tp_clear*/
+  __pyx_tp_traverse_3_sa___pyx_scope_struct_21_form_rule, /*tp_traverse*/
+  __pyx_tp_clear_3_sa___pyx_scope_struct_21_form_rule, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_3_sa___pyx_scope_struct_21_new_rule, /*tp_methods*/
+  __pyx_methods_3_sa___pyx_scope_struct_21_form_rule, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -76331,7 +75899,7 @@ static PyTypeObject __pyx_type_3_sa___pyx_scope_struct_21_new_rule = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_3_sa___pyx_scope_struct_21_new_rule, /*tp_new*/
+  __pyx_tp_new_3_sa___pyx_scope_struct_21_form_rule, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -76388,7 +75956,7 @@ static int __pyx_tp_clear_3_sa___pyx_scope_struct_22_genexpr(PyObject *o) {
   struct __pyx_obj_3_sa___pyx_scope_struct_22_genexpr *p = (struct __pyx_obj_3_sa___pyx_scope_struct_22_genexpr *)o;
   PyObject* tmp;
   tmp = ((PyObject*)p->__pyx_outer_scope);
-  p->__pyx_outer_scope = ((struct __pyx_obj_3_sa___pyx_scope_struct_21_new_rule *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_outer_scope = ((struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   tmp = ((PyObject*)p->__pyx_v_i);
   p->__pyx_v_i = Py_None; Py_INCREF(Py_None);
@@ -77722,7 +77290,6 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
   {&__pyx_n_s__e_i, __pyx_k__e_i, sizeof(__pyx_k__e_i), 0, 0, 1, 1},
   {&__pyx_n_s__e_j, __pyx_k__e_j, sizeof(__pyx_k__e_j), 0, 0, 1, 1},
   {&__pyx_n_s__e_span, __pyx_k__e_span, sizeof(__pyx_k__e_span), 0, 0, 1, 1},
-  {&__pyx_n_s__e_sym, __pyx_k__e_sym, sizeof(__pyx_k__e_sym), 0, 0, 1, 1},
   {&__pyx_n_s__e_text, __pyx_k__e_text, sizeof(__pyx_k__e_text), 0, 0, 1, 1},
   {&__pyx_n_s__e_words, __pyx_k__e_words, sizeof(__pyx_k__e_words), 0, 0, 1, 1},
   {&__pyx_n_s__earray, __pyx_k__earray, sizeof(__pyx_k__earray), 0, 0, 1, 1},
@@ -77739,14 +77306,13 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
   {&__pyx_n_s__f_i, __pyx_k__f_i, sizeof(__pyx_k__f_i), 0, 0, 1, 1},
   {&__pyx_n_s__f_j, __pyx_k__f_j, sizeof(__pyx_k__f_j), 0, 0, 1, 1},
   {&__pyx_n_s__f_span, __pyx_k__f_span, sizeof(__pyx_k__f_span), 0, 0, 1, 1},
-  {&__pyx_n_s__f_sym, __pyx_k__f_sym, sizeof(__pyx_k__f_sym), 0, 0, 1, 1},
   {&__pyx_n_s__f_text, __pyx_k__f_text, sizeof(__pyx_k__f_text), 0, 0, 1, 1},
   {&__pyx_n_s__f_words, __pyx_k__f_words, sizeof(__pyx_k__f_words), 0, 0, 1, 1},
   {&__pyx_n_s__fcount, __pyx_k__fcount, sizeof(__pyx_k__fcount), 0, 0, 1, 1},
   {&__pyx_n_s__fe, __pyx_k__fe, sizeof(__pyx_k__fe), 0, 0, 1, 1},
   {&__pyx_n_s__filename, __pyx_k__filename, sizeof(__pyx_k__filename), 0, 0, 1, 1},
   {&__pyx_n_s__fmt_rule, __pyx_k__fmt_rule, sizeof(__pyx_k__fmt_rule), 0, 0, 1, 1},
-  {&__pyx_n_s__form_rules, __pyx_k__form_rules, sizeof(__pyx_k__form_rules), 0, 0, 1, 1},
+  {&__pyx_n_s__form_rule, __pyx_k__form_rule, sizeof(__pyx_k__form_rule), 0, 0, 1, 1},
   {&__pyx_n_s__format, __pyx_k__format, sizeof(__pyx_k__format), 0, 0, 1, 1},
   {&__pyx_n_s__fphrase, __pyx_k__fphrase, sizeof(__pyx_k__fphrase), 0, 0, 1, 1},
   {&__pyx_n_s__from_binary, __pyx_k__from_binary, sizeof(__pyx_k__from_binary), 0, 0, 1, 1},
@@ -77821,7 +77387,6 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
   {&__pyx_n_s__new_e_i, __pyx_k__new_e_i, sizeof(__pyx_k__new_e_i), 0, 0, 1, 1},
   {&__pyx_n_s__new_e_j, __pyx_k__new_e_j, sizeof(__pyx_k__new_e_j), 0, 0, 1, 1},
   {&__pyx_n_s__new_min_bound, __pyx_k__new_min_bound, sizeof(__pyx_k__new_min_bound), 0, 0, 1, 1},
-  {&__pyx_n_s__new_rule, __pyx_k__new_rule, sizeof(__pyx_k__new_rule), 0, 0, 1, 1},
   {&__pyx_n_s__next_states, __pyx_k__next_states, sizeof(__pyx_k__next_states), 0, 0, 1, 1},
   {&__pyx_n_s__nt, __pyx_k__nt, sizeof(__pyx_k__nt), 0, 0, 1, 1},
   {&__pyx_n_s__nt_collision, __pyx_k__nt_collision, sizeof(__pyx_k__nt_collision), 0, 0, 1, 1},
@@ -77857,7 +77422,6 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
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   {&__pyx_n_s__ru_stime, __pyx_k__ru_stime, sizeof(__pyx_k__ru_stime), 0, 0, 1, 1},
   {&__pyx_n_s__ru_utime, __pyx_k__ru_utime, sizeof(__pyx_k__ru_utime), 0, 0, 1, 1},
-  {&__pyx_n_s__rule, __pyx_k__rule, sizeof(__pyx_k__rule), 0, 0, 1, 1},
   {&__pyx_n_s__sa, __pyx_k__sa, sizeof(__pyx_k__sa), 0, 0, 1, 1},
   {&__pyx_n_s__sa_high, __pyx_k__sa_high, sizeof(__pyx_k__sa_high), 0, 0, 1, 1},
   {&__pyx_n_s__sa_low, __pyx_k__sa_low, sizeof(__pyx_k__sa_low), 0, 0, 1, 1},
@@ -78684,14 +78248,14 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GIVEREF(((PyObject *)__pyx_kp_s_121));
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_122));
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1856
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1860
  *         # Extract all possible hierarchical phrases starting at a source index
  *         # f_ i and j are current, e_ i and j are previous
  *         def extract(f_i, f_j, e_i, e_j, min_bound, wc, links, nt, nt_open):             # <<<<<<<<<<<<<<
  *             # Phrase extraction limits
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  */
-  __pyx_k_tuple_134 = PyTuple_New(20); if (unlikely(!__pyx_k_tuple_134)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_134 = PyTuple_New(19); if (unlikely(!__pyx_k_tuple_134)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_INCREF(((PyObject *)__pyx_n_s__f_i));
   PyTuple_SET_ITEM(__pyx_k_tuple_134, 0, ((PyObject *)__pyx_n_s__f_i));
@@ -78741,141 +78305,138 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_INCREF(((PyObject *)__pyx_n_s__old_last_nt));
   PyTuple_SET_ITEM(__pyx_k_tuple_134, 15, ((PyObject *)__pyx_n_s__old_last_nt));
   __Pyx_GIVEREF(((PyObject *)__pyx_n_s__old_last_nt));
-  __Pyx_INCREF(((PyObject *)__pyx_n_s__rule));
-  PyTuple_SET_ITEM(__pyx_k_tuple_134, 16, ((PyObject *)__pyx_n_s__rule));
-  __Pyx_GIVEREF(((PyObject *)__pyx_n_s__rule));
   __Pyx_INCREF(((PyObject *)__pyx_n_s__nt_collision));
-  PyTuple_SET_ITEM(__pyx_k_tuple_134, 17, ((PyObject *)__pyx_n_s__nt_collision));
+  PyTuple_SET_ITEM(__pyx_k_tuple_134, 16, ((PyObject *)__pyx_n_s__nt_collision));
   __Pyx_GIVEREF(((PyObject *)__pyx_n_s__nt_collision));
   __Pyx_INCREF(((PyObject *)__pyx_n_s__link));
-  PyTuple_SET_ITEM(__pyx_k_tuple_134, 18, ((PyObject *)__pyx_n_s__link));
+  PyTuple_SET_ITEM(__pyx_k_tuple_134, 17, ((PyObject *)__pyx_n_s__link));
   __Pyx_GIVEREF(((PyObject *)__pyx_n_s__link));
   __Pyx_INCREF(((PyObject *)__pyx_n_s__plus_links));
-  PyTuple_SET_ITEM(__pyx_k_tuple_134, 19, ((PyObject *)__pyx_n_s__plus_links));
+  PyTuple_SET_ITEM(__pyx_k_tuple_134, 18, ((PyObject *)__pyx_n_s__plus_links));
   __Pyx_GIVEREF(((PyObject *)__pyx_n_s__plus_links));
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_134));
-  __pyx_k_codeobj_135 = (PyObject*)__Pyx_PyCode_New(9, 0, 20, 0, 0, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_k_tuple_134, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_136, __pyx_n_s__extract, 1856, __pyx_empty_bytes); if (unlikely(!__pyx_k_codeobj_135)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1856; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_codeobj_135 = (PyObject*)__Pyx_PyCode_New(9, 0, 19, 0, 0, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_k_tuple_134, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_136, __pyx_n_s__extract, 1860, __pyx_empty_bytes); if (unlikely(!__pyx_k_codeobj_135)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1860; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2142
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2100
  *     # Debugging
  *     def dump_online_stats(self):
  *         logger.info('------------------------------')             # <<<<<<<<<<<<<<
  *         logger.info('         Online Stats         ')
  *         logger.info('------------------------------')
  */
-  __pyx_k_tuple_140 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_140)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2142; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_140 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_140)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2100; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_k_tuple_140);
   __Pyx_INCREF(((PyObject *)__pyx_kp_s_139));
   PyTuple_SET_ITEM(__pyx_k_tuple_140, 0, ((PyObject *)__pyx_kp_s_139));
   __Pyx_GIVEREF(((PyObject *)__pyx_kp_s_139));
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_140));
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2143
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2101
  *     def dump_online_stats(self):
  *         logger.info('------------------------------')
  *         logger.info('         Online Stats         ')             # <<<<<<<<<<<<<<
  *         logger.info('------------------------------')
  *         logger.info('f')
  */
-  __pyx_k_tuple_142 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_142)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2143; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_142 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_142)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2101; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_k_tuple_142);
   __Pyx_INCREF(((PyObject *)__pyx_kp_s_141));
   PyTuple_SET_ITEM(__pyx_k_tuple_142, 0, ((PyObject *)__pyx_kp_s_141));
   __Pyx_GIVEREF(((PyObject *)__pyx_kp_s_141));
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_142));
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2144
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2102
  *         logger.info('------------------------------')
  *         logger.info('         Online Stats         ')
  *         logger.info('------------------------------')             # <<<<<<<<<<<<<<
  *         logger.info('f')
  *         for w in self.bilex_f:
  */
-  __pyx_k_tuple_143 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_143)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2144; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_143 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_143)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2102; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_INCREF(((PyObject *)__pyx_kp_s_139));
   PyTuple_SET_ITEM(__pyx_k_tuple_143, 0, ((PyObject *)__pyx_kp_s_139));
   __Pyx_GIVEREF(((PyObject *)__pyx_kp_s_139));
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_143));
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2145
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2103
  *         logger.info('         Online Stats         ')
  *         logger.info('------------------------------')
  *         logger.info('f')             # <<<<<<<<<<<<<<
  *         for w in self.bilex_f:
  *             logger.info(sym_tostring(w) + ' : ' + str(self.bilex_f[w]))
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-  __pyx_k_tuple_144 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_144)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2145; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_144 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_144)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2103; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_GIVEREF(((PyObject *)__pyx_n_s__f));
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_144));
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2148
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2106
  *         for w in self.bilex_f:
  *             logger.info(sym_tostring(w) + ' : ' + str(self.bilex_f[w]))
  *         logger.info('e')             # <<<<<<<<<<<<<<
  *         for w in self.bilex_e:
  *             logger.info(sym_tostring(w) + ' : ' + str(self.bilex_e[w]))
  */
-  __pyx_k_tuple_146 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_146)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2148; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_146 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_146)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2106; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_INCREF(((PyObject *)__pyx_n_s__e));
   PyTuple_SET_ITEM(__pyx_k_tuple_146, 0, ((PyObject *)__pyx_n_s__e));
   __Pyx_GIVEREF(((PyObject *)__pyx_n_s__e));
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_146));
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2151
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2109
  *         for w in self.bilex_e:
  *             logger.info(sym_tostring(w) + ' : ' + str(self.bilex_e[w]))
  *         logger.info('fe')             # <<<<<<<<<<<<<<
  *         for w in self.bilex_fe:
  *             for w2 in self.bilex_fe[w]:
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+  __pyx_k_tuple_147 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_147)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2109; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2155
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2113
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+  __pyx_k_tuple_148 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_148)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2113; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_148));
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2158
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2116
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+  __pyx_k_tuple_149 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_149)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2116; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_149));
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2161
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2119
  *         for ph in self.phrases_e:
  *             logger.info(str(ph) + ' ||| ' + str(self.phrases_e[ph]))
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+  __pyx_k_tuple_150 = PyTuple_New(1); if (unlikely(!__pyx_k_tuple_150)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2119; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2167
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2125
  * 
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-  __pyx_k_tuple_169 = PyTuple_New(4); if (unlikely(!__pyx_k_tuple_169)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2167; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_169 = PyTuple_New(4); if (unlikely(!__pyx_k_tuple_169)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2125; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_GIVEREF(((PyObject *)__pyx_n_s__k));
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+  __pyx_k_codeobj_170 = (PyObject*)__Pyx_PyCode_New(3, 0, 4, 0, 0, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_k_tuple_169, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_136, __pyx_n_s__span_check, 2125, __pyx_empty_bytes); if (unlikely(!__pyx_k_codeobj_170)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2125; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2175
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2133
  *     return True
  * 
  * def span_inc(vec, i, j):             # <<<<<<<<<<<<<<
  *     k = i
  *     while k <= j:
  */
-  __pyx_k_tuple_171 = PyTuple_New(4); if (unlikely(!__pyx_k_tuple_171)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2175; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_171 = PyTuple_New(4); if (unlikely(!__pyx_k_tuple_171)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2133; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_GIVEREF(((PyObject *)__pyx_n_s__k));
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+  __pyx_k_codeobj_172 = (PyObject*)__Pyx_PyCode_New(3, 0, 4, 0, 0, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_k_tuple_171, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_136, __pyx_n_s__span_inc, 2133, __pyx_empty_bytes); if (unlikely(!__pyx_k_codeobj_172)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2133; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2181
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2139
  *         k += 1
  * 
  * def span_dec(vec, i, j):             # <<<<<<<<<<<<<<
  *     k = i
  *     while k <= j:
  */
-  __pyx_k_tuple_173 = PyTuple_New(4); if (unlikely(!__pyx_k_tuple_173)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2181; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_173 = PyTuple_New(4); if (unlikely(!__pyx_k_tuple_173)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_INCREF(((PyObject *)__pyx_n_s__vec));
   PyTuple_SET_ITEM(__pyx_k_tuple_173, 0, ((PyObject *)__pyx_n_s__vec));
@@ -79094,7 +78655,7 @@ static int __Pyx_InitCachedConstants(void) {
   PyTuple_SET_ITEM(__pyx_k_tuple_173, 3, ((PyObject *)__pyx_n_s__k));
   __Pyx_GIVEREF(((PyObject *)__pyx_n_s__k));
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_173));
-  __pyx_k_codeobj_174 = (PyObject*)__Pyx_PyCode_New(3, 0, 4, 0, 0, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_k_tuple_173, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_136, __pyx_n_s__span_dec, 2181, __pyx_empty_bytes); if (unlikely(!__pyx_k_codeobj_174)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2181; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_codeobj_174 = (PyObject*)__Pyx_PyCode_New(3, 0, 4, 0, 0, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_k_tuple_173, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_136, __pyx_n_s__span_dec, 2139, __pyx_empty_bytes); if (unlikely(!__pyx_k_codeobj_174)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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@@ -79402,13 +78963,13 @@ PyMODINIT_FUNC PyInit__sa(void)
   __pyx_ptype_3_sa___pyx_scope_struct_19_input = &__pyx_type_3_sa___pyx_scope_struct_19_input;
   if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_20_add_instance) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 1829; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_3_sa___pyx_scope_struct_20_add_instance = &__pyx_type_3_sa___pyx_scope_struct_20_add_instance;
-  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_21_new_rule) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2130; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_3_sa___pyx_scope_struct_21_new_rule = &__pyx_type_3_sa___pyx_scope_struct_21_new_rule;
-  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_22_genexpr) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2133; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_21_form_rule) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2033; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_3_sa___pyx_scope_struct_21_form_rule = &__pyx_type_3_sa___pyx_scope_struct_21_form_rule;
+  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_22_genexpr) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2090; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_3_sa___pyx_scope_struct_22_genexpr = &__pyx_type_3_sa___pyx_scope_struct_22_genexpr;
-  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_23_fmt_rule) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2136; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_23_fmt_rule) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2094; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_3_sa___pyx_scope_struct_23_fmt_rule = &__pyx_type_3_sa___pyx_scope_struct_23_fmt_rule;
-  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_24_genexpr) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2137; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_24_genexpr) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2095; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_3_sa___pyx_scope_struct_24_genexpr = &__pyx_type_3_sa___pyx_scope_struct_24_genexpr;
   if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_25___iter__) < 0) {__pyx_filename = __pyx_f[13]; __pyx_lineno = 15; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_3_sa___pyx_scope_struct_25___iter__ = &__pyx_type_3_sa___pyx_scope_struct_25___iter__;
@@ -79806,40 +79367,40 @@ PyMODINIT_FUNC PyInit__sa(void)
   __Pyx_GIVEREF(__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2167
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2125
  * 
  * # Spans are _inclusive_ on both ends [i, j]
  * def span_check(vec, i, j):             # <<<<<<<<<<<<<<
  *     k = i
  *     while k <= j:
  */
-  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_13span_check, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2167; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_13span_check, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2125; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_1);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_check, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2167; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_check, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2125; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2175
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2133
  *     return True
  * 
  * def span_inc(vec, i, j):             # <<<<<<<<<<<<<<
  *     k = i
  *     while k <= j:
  */
-  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_15span_inc, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2175; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_15span_inc, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2133; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_1);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_inc, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2175; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_inc, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2133; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2181
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2139
  *         k += 1
  * 
  * def span_dec(vec, i, j):             # <<<<<<<<<<<<<<
  *     k = i
  *     while k <= j:
  */
-  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_17span_dec, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2181; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_17span_dec, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_1);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_dec, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2181; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_dec, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
   /* "/home/m/workspace/cdec/python/src/sa/features.pxi":1
diff --git a/python/src/sa/rulefactory.pxi b/python/src/sa/rulefactory.pxi
index 3fcf8879..29bd809c 100644
--- a/python/src/sa/rulefactory.pxi
+++ b/python/src/sa/rulefactory.pxi
@@ -1829,6 +1829,10 @@ cdef class HieroCachingRuleFactory:
     def add_instance(self, f_words, e_words, alignment):
 
         # Rules extracted from this instance
+        # Track span of absolute alignment links to make
+        # sure we don't extract the same rule for the same
+        # span more than once.
+        # (f, e, al, f_min_link, f_max_link)
         rules = set()
 
         f_len = len(f_words)
@@ -1916,8 +1920,7 @@ cdef class HieroCachingRuleFactory:
                 if links:
                     # Make sure we cover all aligned words
                     if f_j >= new_min_bound:
-                        for rule in self.form_rules(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links):
-                            rules.add(rule)
+                            rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
                 extract(f_i, f_j + 1, new_e_i, new_e_j, new_min_bound, wc, links, nt, False)
                 nt[-1] = old_last_nt
                 if link_i < nt[-1][3]:
@@ -1943,8 +1946,7 @@ cdef class HieroCachingRuleFactory:
                 links.append(plus_links)
                 if links:
                     if f_j >= new_min_bound:
-                        for rule in self.form_rules(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links):
-                            rules.add(rule)
+                        rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
                 extract(f_i, f_j + 1, new_e_i, new_e_j, new_min_bound, wc + 1, links, nt, False)
                 links.pop()
                 for link in al[f_j]:
@@ -1970,8 +1972,7 @@ cdef class HieroCachingRuleFactory:
                     nt[-1][4] = link_j
                 if links:
                     if f_j >= new_min_bound:
-                        for rule in self.form_rules(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links):
-                            rules.add(rule)
+                            rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
                 extract(f_i, f_j + 1, new_e_i, new_e_j, new_min_bound, wc, links, nt, False)
                 nt[-1] = old_last_nt
                 if new_e_i < nt[-1][3]:
@@ -1991,8 +1992,7 @@ cdef class HieroCachingRuleFactory:
                 # Require at least one word in phrase
                 if links:
                     if f_j >= new_min_bound:
-                        for rule in self.form_rules(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links):
-                            rules.add(rule)
+                        rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
                 extract(f_i, f_j + 1, new_e_i, new_e_j, new_min_bound, wc, links, nt, False)
                 nt.pop()
                 span_dec(cover, link_i, link_j)
@@ -2009,21 +2009,16 @@ cdef class HieroCachingRuleFactory:
             f_i += 1
 
         for rule in sorted(rules):
-            logger.info(self.fmt_rule(*rule))
+            logger.info(self.fmt_rule(*rule[:3]))
         
         # Update phrase counts
-        f_set = set()
-        e_set = set()
-        for (f_ph, e_ph, al) in rules:
-            f_set.add(f_ph)
-            e_set.add(e_ph)
+        for rule in rules:
+            (f_ph, e_ph, al) = rule[:3]
+            self.phrases_f[f_ph] += 1
+            self.phrases_e[e_ph] += 1 
             self.phrases_fe[f_ph][e_ph] += 1
             if not self.phrases_al[f_ph][e_ph]:
                 self.phrases_al[f_ph][e_ph] = al
-        for f_ph in f_set:
-            self.phrases_f[f_ph] += 1
-        for e_ph in e_set:
-            self.phrases_e[e_ph] += 1
             
         # Update Bilexical counts
         for e_w in e_words:
@@ -2035,11 +2030,10 @@ cdef class HieroCachingRuleFactory:
 
 
     # Create a rule from source, target, non-terminals, and alignments
-    def form_rules(self, f_i, e_i, f_span, e_span, nt, al):
-    
-        # This could be more efficient but is unlikely to be the bottleneck
-        rules = []
+    def form_rule(self, f_i, e_i, f_span, e_span, nt, al):
     
+        # Handle non-terminals    
+        
         nt_inv = sorted(nt, cmp=lambda x, y: cmp(x[3], y[3]))
     
         f_sym = list(f_span[:])
@@ -2066,6 +2060,8 @@ cdef class HieroCachingRuleFactory:
     
         # Adjusting alignment links takes some doing
         links = [list(link) for sub in al for link in sub]
+        f_link_min = links[0][0]
+        f_link_max = links[-1][0]
         links_inv = sorted(links, cmp=lambda x, y: cmp(x[1], y[1]))
         links_len = len(links)
         nt_len = len(nt)
@@ -2088,51 +2084,13 @@ cdef class HieroCachingRuleFactory:
             links_inv[i][1] -= off
             i += 1
         
-        # Rule
-        rules.append(self.new_rule(f_sym, e_sym, links))
-        if len(f_sym) >= self.max_length or len(nt) >= self.max_nonterminals:
-            return rules
-        # DEBUG: no boundary NTs
-        return rules
-        last_index = nt[-1][0] if nt else 0
-        # Rule [X]
-        if not nt or not sym_isvar(f_sym[-1]):
-            f_sym.append(sym_setindex(self.category, last_index + 1))
-            e_sym.append(sym_setindex(self.category, last_index + 1))
-            rules.append(self.new_rule(f_sym, e_sym, links))
-            f_sym.pop()
-            e_sym.pop()
-        # [X] Rule
-        f_len = len(f_sym)
-        e_len = len(e_sym)
-        if not nt or not sym_isvar(f_sym[0]):
-            for i from 0 <= i < f_len:
-                if sym_isvar(f_sym[i]):
-                    f_sym[i] = sym_setindex(self.category, sym_getindex(f_sym[i]) + 1)
-            for i from 0 <= i < e_len:
-                if sym_isvar(e_sym[i]):
-                    e_sym[i] = sym_setindex(self.category, sym_getindex(e_sym[i]) + 1)
-            for link in links:
-                link[0] += 1
-                link[1] += 1
-            f_sym.insert(0, sym_setindex(self.category, 1))
-            e_sym.insert(0, sym_setindex(self.category, 1))
-            rules.append(self.new_rule(f_sym, e_sym, links))
-        if len(f_sym) >= self.max_length or len(nt) + 1 >= self.max_nonterminals:
-            return rules
-        # [X] Rule [X]
-        if not nt or not sym_isvar(f_sym[-1]):
-            f_sym.append(sym_setindex(self.category, last_index + 2))
-            e_sym.append(sym_setindex(self.category, last_index + 2))
-            rules.append(self.new_rule(f_sym, e_sym, links))
-        return rules
-
-    def new_rule(self, f_sym, e_sym, links):
+        # Create rule (f_phrase, e_phrase, links, f_link_min, f_link_max)
         f = Phrase(f_sym)
         e = Phrase(e_sym)
         a = tuple(self.alignment.link(i, j) for (i, j) in links)
-        return (f, e, a)
-    
+        return (f, e, a, f_link_min, f_link_max)
+
+    # Rule string from rule
     def fmt_rule(self, f, e, a):
         a_str = ' '.join('{0}-{1}'.format(*self.alignment.unlink(packed)) for packed in a)
         return '[X] ||| {0} ||| {1} ||| {2}'.format(f, e, a_str)