Typos

src/smt/smt_model_checker.cpp

@@ -521,7 +521,7 @@ namespace smt {
     // the instantiation rules for store(a, i, v) are:
     //     sotre(a, i, v)[j] = if i = j then v else a[j] with patterns {a[j], store(a, i, v)} { store(a, i, v)[j] }
     // The first pattern is not included.
-    // TBD use a model-based scheme for exracting instantiations instead of
+    // TBD use a model-based scheme for extracting instantiations instead of
     // using multi-patterns.
     //