Trey Anastasio received a reduced sentence of three years’ probation for a drug conviction after he successfully completed a counseling and treatment program. The former Phish frontman had pleaded guilty to a felony charge for possessing painkillers without a prescription during a traffic stop in December 2006. He faced up to three years in prison if he failed the drug program, which he began in April 2007. The 43-year-old’s guilty plea was reduced to a misdemeanor Wednesday in Port Edward, N.Y., because he will graduate from the drug program next month and has completed community service.