anchor.diff:  
         // NOTE: DOES NOT check register x0 because set value to Zero when read
         regfile.upd(rd, rd_value);
  -      cpu_state <= STATE_FINISH;
  +      cpu_state <= STATE_FETCH;
      endrule
   
   
  -   // ---------------- FINISH: increment csr_instret or record explicit CSRRx update of csr_instret
  -
  -   rule rl_finish(cpu_state == STATE_FINISH);
  -      if (cfg_verbose > 1) $display("[%7d] rl_finish: ", csr_cycle);
  -
  -      csr_instret <= csr_instret + 1;
  -      cpu_state   <= STATE_FETCH;
  -   endrule
   
      // ---------------- Increment csr_cycle according to external oracles
   
  
positive.code:    function Action fa_finish_with_no_output();
        action
           pc        <= fv_fall_through_pc(pc);
           cpu_state <= STATE_FINISH;
        endaction
     endfunction
  
  
negative.code:    function Action fa_finish_cond_branch(Bool condition_taken, Addr next_pc);
        action
           pc        <= (condition_taken ? next_pc : fv_fall_through_pc(pc));
           cpu_state <= STATE_FETCH;
        endaction
     endfunction
  
  