+void Predicate::add_predicate_expr(token_t token, FuncInst * func_inst, bool value)
+{
+ struct pred_expr *ptr = new pred_expr(token, func_inst, value);
+ pred_expressions.add(ptr);
+}
+
+void Predicate::add_child(Predicate * child)
+{
+ /* check duplication? */
+ children.push_back(child);
+}
+
+void Predicate::set_parent(Predicate * parent_pred)
+{
+ parent = parent_pred;
+ depth = parent_pred->get_depth() + 1;
+}
+
+void Predicate::set_exit(Predicate * exit_pred)
+{
+ exit = exit_pred;
+}
+
+void Predicate::copy_predicate_expr(Predicate * other)
+{
+ PredExprSet * other_pred_expressions = other->get_pred_expressions();
+ PredExprSetIter * it = other_pred_expressions->iterator();
+
+ while (it->hasNext()) {
+ struct pred_expr * ptr = it->next();
+ struct pred_expr * copy = new pred_expr(ptr->token, ptr->func_inst, ptr->value);
+ pred_expressions.add(copy);
+ }
+
+ delete it;
+}
+
+/* Follow the child if any child whose FuncInst matches with inst
+ *
+ * @param inst must be an ATOMIC_WRITE FuncInst
+ * @return NULL if no such child is found.
+ */
+Predicate * Predicate::follow_write_child(FuncInst * inst)
+{
+ ASSERT(inst->get_type() == ATOMIC_WRITE);
+
+ for (uint i = 0;i < children.size();i++) {
+ Predicate * child = children[i];
+ if (child->get_func_inst() == inst)
+ return child;
+ }
+
+ return NULL;
+}
+
+/* Evaluate predicate expressions against the given inst_act_map */
+ConcretePredicate * Predicate::evaluate(inst_act_map_t * inst_act_map, thread_id_t tid)
+{
+ ConcretePredicate * concrete = new ConcretePredicate(tid);
+ PredExprSetIter * it = pred_expressions.iterator();
+
+ while (it->hasNext()) {
+ struct pred_expr * ptr = it->next();
+ uint64_t value = 0;
+
+ switch(ptr->token) {
+ case NOPREDICATE:
+ break;
+ case EQUALITY:
+ FuncInst * to_be_compared;
+ ModelAction * last_act;
+
+ to_be_compared = ptr->func_inst;
+ last_act = inst_act_map->get(to_be_compared);
+ value = last_act->get_reads_from_value();
+ break;
+ case NULLITY:
+ break;
+ default:
+ break;
+ }
+
+ concrete->add_expression(ptr->token, value, ptr->value);
+ }
+
+ delete it;
+ return concrete;
+}
+
+void Predicate::print_predicate()