Supreme Court of India
State Of Punjab vs Surjit Singh & Another on 6 January, 1967
as i already said, bigamy is offense against state.
bigamy is criminal case and would be tried expeditiously as compared to the civil case of divorce. however, since its very difficult to prove 2nd ceremonial marriage, acquittal of wife in 494 wont help the divorce case.
the husband has to prove her adultry and get divorce on this ground.
of course, filing 494 would pressurize the wife side and make her settle all the litigations.
the husband should also think about her adultry (497) which would help him in civil case of divorce too.