Gurobi 5.0.1 (linux64) logging started Fri Jan 18 08:09:34 2013 Optimize a model with 50800 rows, 125150 columns and 400250 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 1.53s Presolved: 50750 rows, 125100 columns, 350200 nonzeros Variable types: 75100 continuous, 50000 integer (50000 binary) Root relaxation: objective 2.198499e+05, 5114 iterations, 0.59 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 219849.939 0 4 - 219849.939 - - 4s 0 0 219901.208 0 3 - 219901.208 - - 5s 0 0 219930.514 0 2 - 219930.514 - - 6s 0 0 219931.664 0 2 - 219931.664 - - 6s 0 0 219940.023 0 2 - 219940.023 - - 7s 0 0 219940.023 0 2 - 219940.023 - - 7s 0 0 219941.765 0 2 - 219941.765 - - 8s 0 0 219944.047 0 2 - 219944.047 - - 9s 0 0 219944.047 0 2 - 219944.047 - - 9s 0 0 219944.047 0 2 - 219944.047 - - 10s 0 0 219944.047 0 2 - 219944.047 - - 11s 0 0 219944.047 0 2 - 219944.047 - - 12s 0 0 219944.047 0 2 - 219944.047 - - 12s 0 2 219944.047 0 2 - 219944.047 - - 19s 2 4 220221.271 1 4 - 220221.271 - 354 20s 46 48 222057.117 23 2 - 220955.102 - 68.1 25s * 79 25 40 222622.35999 220955.102 0.75% 45.7 27s 104 30 221990.518 14 2 222622.360 221014.973 0.72% 45.4 30s * 109 19 17 221990.67135 221014.973 0.44% 43.5 30s * 162 7 35 221988.58882 221928.039 0.03% 36.4 34s 170 1 cutoff 7 221988.589 221942.027 0.02% 35.1 35s Cutting planes: Gomory: 2 Implied bound: 78 Explored 172 nodes (13852 simplex iterations) in 35.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.219885888237e+05, best bound 2.219885888237e+05, gap 0.0%