Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:36:02 2013 Optimize a model with 2600 rows, 105900 columns and 242200 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.33s Presolved: 2500 rows, 105800 columns, 237100 nonzeros Variable types: 105200 continuous, 600 integer (600 binary) Root relaxation: objective 8.654105e+05, 6777 iterations, 0.66 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 6 - 865410.545 - - 1s 0 0 865463.393 0 6 - 865463.393 - - 1s 0 0 865502.983 0 6 - 865502.983 - - 1s 0 0 865504.662 0 6 - 865504.662 - - 2s 0 0 865505.494 0 7 - 865505.494 - - 2s 0 0 865508.827 0 7 - 865508.827 - - 2s 0 0 865508.827 0 7 - 865508.827 - - 3s 0 0 865509.654 0 7 - 865509.654 - - 3s 0 0 865512.896 0 7 - 865512.896 - - 3s 0 0 865513.771 0 7 - 865513.771 - - 3s 0 0 865514.350 0 7 - 865514.350 - - 4s 0 0 865514.350 0 7 - 865514.350 - - 4s 0 0 865514.457 0 7 - 865514.457 - - 5s 0 0 865514.457 0 7 - 865514.457 - - 6s 0 2 865521.778 0 7 - 865521.778 - - 10s 15 17 867505.225 12 3 - 865896.389 - 160 15s * 42 17 39 868329.09610 865896.389 0.28% 69.0 18s 54 20 866676.815 11 3 868329.096 865938.634 0.28% 78.7 20s H 125 45 867538.89232 865938.634 0.18% 36.1 23s 154 49 867211.690 110 1 867538.892 865938.634 0.18% 29.8 25s 235 60 867360.818 12 2 867538.892 866673.756 0.10% 34.3 30s * 246 57 23 867428.19114 866673.756 0.09% 33.2 30s H 289 15 866879.65023 866771.014 0.01% 30.9 32s Cutting planes: Flow cover: 17 Explored 303 nodes (18338 simplex iterations) in 32.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.668796502261e+05, best bound 8.667984266279e+05, gap 0.0094%