fix #3557

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/tactic/core/cofactor_elim_term_ite.cpp

@@ -33,8 +33,7 @@ struct cofactor_elim_term_ite::imp {
     void checkpoint() { 
         if (memory::get_allocation_size() > m_max_memory)
             throw tactic_exception(TACTIC_MAX_MEMORY_MSG);
-        if (m.canceled())
-            throw tactic_exception(m.limit().get_cancel_msg());
+        tactic::checkpoint(m);
     }
 
     // Collect atoms that contain term if-then-else

src/tactic/core/ctx_simplify_tactic.cpp

@@ -203,8 +203,7 @@ struct ctx_simplify_tactic::imp {
     void checkpoint() {
         if (memory::get_allocation_size() > m_max_memory)
             throw tactic_exception(TACTIC_MAX_MEMORY_MSG);
-        if (m.canceled())
-            throw tactic_exception(m.limit().get_cancel_msg());
+        tactic::checkpoint(m);
     }
 
     bool shared(expr * t) const {

src/tactic/core/occf_tactic.cpp

@@ -35,8 +35,7 @@ class occf_tactic : public tactic {
         }
 
         void checkpoint() {
-            if (m.canceled())
-                throw tactic_exception(TACTIC_CANCELED_MSG);
+            tactic::checkpoint(m);
         }
 
         bool is_literal(expr * t) const {

src/tactic/core/reduce_args_tactic.cpp

@@ -112,8 +112,7 @@ struct reduce_args_tactic::imp {
     }
 
     void checkpoint() { 
-        if (m_manager.canceled())
-            throw tactic_exception(m_manager.limit().get_cancel_msg());
+        tactic::checkpoint(m_manager);
     }
     
     struct find_non_candidates_proc {

src/tactic/core/reduce_invertible_tactic.cpp

@@ -101,8 +101,7 @@ public:
 
 private:
     void checkpoint() { 
-        if (m.canceled())
-            throw tactic_exception(m.limit().get_cancel_msg());
+        tactic::checkpoint(m);
     }
 
     bool is_bv_neg(expr * e) {

src/tactic/core/solve_eqs_tactic.cpp

@@ -86,8 +86,7 @@ class solve_eqs_tactic : public tactic {
         }
                 
         void checkpoint() {
-            if (m().canceled())
-                throw tactic_exception(m().limit().get_cancel_msg());
+            tactic::checkpoint(m());
         }
         
         // Check if the number of occurrences of t is below the specified threshold :solve-eqs-max-occs

src/tactic/core/tseitin_cnf_tactic.cpp

@@ -786,8 +786,7 @@ class tseitin_cnf_tactic : public tactic {
         
         
         void checkpoint() {
-            if (m.canceled())
-                throw tactic_exception(TACTIC_CANCELED_MSG);
+            tactic::checkpoint(m);
             if (memory::get_allocation_size() > m_max_memory)
                 throw tactic_exception(TACTIC_MAX_MEMORY_MSG);
         }