-V{t#,#}- Verilated::debug is on. Message prefix indicates {<thread>,<sequence_number>}.
-V{t#,#}+    Vt_unopt_converge_run_bad::_change_request
-V{t#,#}        CHANGE: t/t_unopt_converge.v:18: x
%Error: t/t_unopt_converge.v:6: Verilated model didn't converge
Aborting...