Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:20:41 2013 Optimize a model with 30910 rows, 30360 columns and 121110 nonzeros Presolve removed 55 rows and 0 columns Presolve time: 0.13s Presolved: 30855 rows, 30360 columns, 121055 nonzeros Variable types: 30305 continuous, 55 integer (55 binary) Root relaxation: objective 5.005036e+04, 5405 iterations, 2.77 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50050.3582 0 49 - 50050.3582 - - 3s H 0 0 71921.000000 50050.3582 30.4% - 4s 0 0 66710.7500 0 2 71921.0000 66710.7500 7.24% - 6s H 0 0 67972.500000 66710.7500 1.86% - 6s H 0 0 67413.000000 66710.7500 1.04% - 6s 0 0 66936.1111 0 1 67413.0000 66936.1111 0.71% - 7s 0 2 66938.1800 0 1 67413.0000 66938.1800 0.70% - 7s * 2 2 2 66994.000000 66994.0000 0.0% 76.0 7s Cutting planes: Gomory: 1 Implied bound: 45 Explored 3 nodes (8922 simplex iterations) in 7.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.699400000000e+04, best bound 6.699400000000e+04, gap 0.0%