Abstract values for SMT-LIB.

Also fix bug 421 relating to incrementality and models.

(this commit was certified error- and warning-free by the test-and-commit script.)

1 files changed, 8 insertions, 1 deletions

diff --git a/src/expr/node_builder.h b/src/expr/node_builder.h
index 0c8ac40f8..351cf3639 100644
--- a/src/expr/node_builder.h
+++ b/src/expr/node_builder.h
@@ -1305,7 +1305,14 @@ inline void NodeBuilder<nchild_thresh>::maybeCheckType(const TNode n) const
     kind::MetaKind mk = n.getMetaKind();
     if( mk != kind::metakind::VARIABLE
         && mk != kind::metakind::CONSTANT ) {
-      d_nm->getType(n, true);
+      try {
+        d_nm->getType(n, true);
+      } catch(UnknownTypeException&) {
+        // Ignore the error; this expression doesn't have a type,
+        // because it has an abstract value in it.  If the user
+        // depends on the type of this expression, he should get an
+        // exception, but so far he's only constructed it.
+      }
     }
   }
 }