diff --git a/sbysrc/sby_engine_aiger.py b/sbysrc/sby_engine_aiger.py
index 3b6c7dc..b08195a 100644
--- a/sbysrc/sby_engine_aiger.py
+++ b/sbysrc/sby_engine_aiger.py
@@ -138,6 +138,11 @@ def run(mode, task, engine_idx, engine):
                     proc_status = "FAIL"
             return None
 
+        if solver_args[0] == "rIC3":
+            match = re.match(r".*all workers unexpectedly exited.*", line)
+            if match:
+                proc_status = "ERROR"
+
         if proc_status is not None:
             if not end_of_cex and not produced_cex and line.isdigit():
                 produced_cex = True
diff --git a/sbysrc/sby_engine_btor.py b/sbysrc/sby_engine_btor.py
index 3d6d177..b155763 100644
--- a/sbysrc/sby_engine_btor.py
+++ b/sbysrc/sby_engine_btor.py
@@ -287,6 +287,9 @@ def run(mode, task, engine_idx, engine):
                 match = re.match(r".*bmc found counter-example in depth (\d+).*", line)
                 if match:
                     common_state.current_step = int(match[1])
+                match = re.match(r".*all workers unexpectedly exited.*", line)
+                if match:
+                    common_state.solver_status = "error"
                 if line == "UNSAT":
                     if common_state.solver_status is None:
                         common_state.solver_status = "unsat"