fix memleak

src/ast/recfun_decl_plugin.cpp

@@ -342,6 +342,12 @@ namespace recfun {
         m_plugin = dynamic_cast<decl::plugin*>(m.get_plugin(m_family_id));
     }
 
+    util::~util() {
+        for (auto & kv : m_dlimit_map) {
+            dealloc(kv.m_value);
+        }
+    }
+
     def * util::decl_fun(symbol const& name, unsigned n, sort *const * domain, sort * range) {
         return alloc(def, m(), m_family_id, name, n, domain, range);
     }

src/ast/recfun_decl_plugin.h

@@ -233,6 +233,7 @@ namespace recfun {
         void set_definition(promise_def & d, unsigned n_vars, var * const * vars, expr * rhs);
     public:
         util(ast_manager &m, family_id);
+        virtual ~util();
 
         ast_manager & m() { return m_manager; }
         th_rewriter & get_th_rewriter() { return m_th_rw; }

src/smt/theory_recfun.cpp

@@ -62,7 +62,7 @@ namespace smt {
         for (auto & kv : m_guards) {
             m().dec_ref(kv.m_key);
         }
-        m_guards.reset();   
+        m_guards.reset();
     }
 
     char const * theory_recfun::get_name() const { return "recfun"; }