Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:20:11 2013 Optimize a model with 1760 rows, 256160 columns and 512160 nonzeros Presolve time: 0.67s Presolved: 1760 rows, 256160 columns, 512160 nonzeros Variable types: 256000 continuous, 160 integer (160 binary) Root relaxation: objective 2.688348e+05, 9512 iterations, 0.89 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 268834.804 0 5 - 268834.804 - - 1s H 0 0 279988.00000 268834.804 3.98% - 2s 0 0 269013.068 0 3 279988.000 269013.068 3.92% - 3s H 0 0 270479.00000 269013.068 0.54% - 3s 0 0 269021.706 0 3 270479.000 269021.706 0.54% - 4s 0 0 269021.706 0 5 270479.000 269021.706 0.54% - 5s 0 0 269021.706 0 3 270479.000 269021.706 0.54% - 6s 0 0 269021.706 0 3 270479.000 269021.706 0.54% - 6s 0 0 269025.551 0 3 270479.000 269025.551 0.54% - 6s 0 0 269032.979 0 4 270479.000 269032.979 0.53% - 6s 0 0 269034.493 0 3 270479.000 269034.493 0.53% - 7s 0 0 269034.493 0 3 270479.000 269034.493 0.53% - 7s 0 0 269034.493 0 3 270479.000 269034.493 0.53% - 7s 0 0 269034.535 0 3 270479.000 269034.535 0.53% - 7s 0 0 269035.900 0 3 270479.000 269035.900 0.53% - 8s 0 0 269035.932 0 2 270479.000 269035.932 0.53% - 8s 0 0 269035.932 0 2 270479.000 269035.932 0.53% - 8s 0 2 269036.777 0 2 270479.000 269036.777 0.53% - 9s 3 5 269172.220 3 2 270479.000 269136.704 0.50% 168 10s H 5 5 270271.00000 269136.704 0.42% 109 10s H 7 6 269830.50000 269136.704 0.26% 128 10s * 10 4 9 269585.00000 269136.704 0.17% 115 10s * 12 4 3 269561.00000 269228.000 0.12% 132 11s Cutting planes: Implied bound: 92 Flow cover: 5 Explored 17 nodes (18074 simplex iterations) in 11.80 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.695610000000e+05, best bound 2.695610000000e+05, gap 0.0%