Add option fmf-empty-sorts.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/theory/quantifiers/model_engine.cpp b/src/theory/quantifiers/model_engine.cpp
index a3a18cf30..f5a063eb8 100644
--- a/src/theory/quantifiers/model_engine.cpp
+++ b/src/theory/quantifiers/model_engine.cpp
@@ -227,7 +227,16 @@ bool ModelEngine::considerQuantifiedFormula( Node q ) {
   if( !d_quantEngine->getModelBuilder()->isQuantifierActive( q ) ){ //!d_quantEngine->getModel()->isQuantifierActive( q );
     return false;
   }else{
-    if( options::fmfFunWellDefinedRelevant() ){
+    if( options::fmfEmptySorts() ){
+      for( unsigned i=0; i<q[0].getNumChildren(); i++ ){
+        TypeNode tn = q[0][i].getType();
+        //we are allowed to assume the type is empty
+        if( d_quantEngine->getModel()->d_rep_set.getNumRelevantGroundReps( tn )==0 ){
+          Trace("model-engine-debug") << "Empty domain quantified formula : " << q << std::endl;
+          return false;
+        }
+      }
+    }else if( options::fmfFunWellDefinedRelevant() ){
       if( q[0].getNumChildren()==1 ){
         TypeNode tn = q[0][0].getType();
         if( tn.getAttribute(AbsTypeFunDefAttribute()) ){