In reply to Suguna R:
he source codes days:
// Class: uvm_reg_single_bit_bash_seq
//
// Verify the implementation of a single register
// by attempting to write 1's and 0's to every bit in it,
// via every address map in which the register is mapped,
// making sure that the resulting value matches the mirrored value.
This is what it is doing in your environment. Right.
If you want to do this on all registers you have to do this for all registers, running in a loop.