Remove spurious assertion in nonlinear extension (#1972)

diff --git a/src/theory/arith/nonlinear_extension.cpp b/src/theory/arith/nonlinear_extension.cpp
index 2ad79ac578ebd9c34ad6e1e967090aecc21c867b..c9a4c5075f84b61d6433521cb668e27b86757b57 100644 (file)
--- a/src/theory/arith/nonlinear_extension.cpp
+++ b/src/theory/arith/nonlinear_extension.cpp
@@ -1038,7 +1038,6 @@ bool NonlinearExtension::checkModel(const std::vector<Node>& assertions,
 void NonlinearExtension::addCheckModelSubstitution(TNode v, TNode s)
 {
   // should not substitute the same variable twice
-  Assert(v.isVar());
   Assert(!hasCheckModelAssignment(v));
   for (unsigned i = 0, size = d_check_model_subs.size(); i < size; i++)
   {