Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:33:19 2013 Optimize a model with 1559 rows, 47472 columns and 2076328 nonzeros Presolve removed 20 rows and 127 columns (presolve time = 5s) ... Presolve removed 21 rows and 139 columns Presolve time: 7.45s Presolved: 1538 rows, 47333 columns, 2070154 nonzeros Variable types: 0 continuous, 47333 integer (47333 binary) Found heuristic solution: objective 23324.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 9514 1.6136569e+04 5.880578e+02 0.000000e+00 5s 13762 1.6233135e+04 1.201563e+02 0.000000e+00 10s 15138 1.6242000e+04 0.000000e+00 0.000000e+00 13s Root relaxation: objective 1.624200e+04, 15138 iterations, 12.64 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16242.0000 0 58 23324.0000 16242.0000 30.4% - 20s H 0 0 21286.000000 16242.0000 23.7% - 22s 0 0 16242.0000 0 56 21286.0000 16242.0000 23.7% - 23s H 0 0 16511.000000 16242.0000 1.63% - 24s H 0 0 16424.000000 16242.0000 1.11% - 24s 0 0 16242.0000 0 56 16424.0000 16242.0000 1.11% - 26s H 0 0 16413.000000 16242.0000 1.04% - 39s 0 0 16242.0000 0 60 16413.0000 16242.0000 1.04% - 46s 0 0 16242.0000 0 56 16413.0000 16242.0000 1.04% - 48s 0 0 16242.0000 0 58 16413.0000 16242.0000 1.04% - 49s 0 0 16243.5000 0 104 16413.0000 16243.5000 1.03% - 52s 0 0 16244.0000 0 60 16413.0000 16244.0000 1.03% - 54s 0 0 16244.0000 0 62 16413.0000 16244.0000 1.03% - 56s 0 0 16245.0000 0 60 16413.0000 16245.0000 1.02% - 58s 0 0 16245.0000 0 62 16413.0000 16245.0000 1.02% - 59s 0 0 16245.6000 0 122 16413.0000 16245.6000 1.02% - 60s 0 0 16246.8372 0 193 16413.0000 16246.8372 1.01% - 62s * 0 0 0 16248.000000 16248.0000 0.0% - 64s Cutting planes: Clique: 18 Zero half: 32 Explored 0 nodes (29941 simplex iterations) in 64.79 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.624800000000e+04, best bound 1.624800000000e+04, gap 0.0%