Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:30:22 2013 Optimize a model with 1600 rows, 100700 columns and 201900 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.27s Presolved: 1500 rows, 100600 columns, 201500 nonzeros Variable types: 100500 continuous, 100 integer (100 binary) Root relaxation: objective 9.053666e+05, 5949 iterations, 0.42 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 905366.638 0 2 - 905366.638 - - 0s H 0 0 925632.03755 905366.638 2.19% - 0s 0 0 905393.438 0 2 925632.038 905393.438 2.19% - 1s 0 0 905440.957 0 2 925632.038 905440.957 2.18% - 1s 0 0 905440.957 0 2 925632.038 905440.957 2.18% - 1s 0 0 905447.957 0 2 925632.038 905447.957 2.18% - 2s 0 0 905447.957 0 2 925632.038 905447.957 2.18% - 2s 0 0 905447.957 0 2 925632.038 905447.957 2.18% - 2s 0 0 905452.768 0 2 925632.038 905452.768 2.18% - 3s 0 0 905458.668 0 2 925632.038 905458.668 2.18% - 3s 0 0 905458.668 0 2 925632.038 905458.668 2.18% - 3s 0 0 905459.470 0 2 925632.038 905459.470 2.18% - 3s 0 0 905460.365 0 2 925632.038 905460.365 2.18% - 4s 0 0 905460.710 0 2 925632.038 905460.710 2.18% - 4s 0 0 905460.710 0 2 925632.038 905460.710 2.18% - 4s 0 2 905463.510 0 2 925632.038 905463.510 2.18% - 5s * 17 6 17 907923.98716 906216.208 0.19% 96.8 8s 27 6 cutoff 6 907923.987 906821.471 0.12% 124 10s Cutting planes: Flow cover: 21 Explored 45 nodes (14280 simplex iterations) in 12.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.079239871585e+05, best bound 9.078834754011e+05, gap 0.0045%