Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:28:49 2013 Optimize a model with 3600 rows, 104300 columns and 214500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.44s Presolved: 3500 rows, 104200 columns, 212400 nonzeros Variable types: 102200 continuous, 2000 integer (2000 binary) Root relaxation: objective 9.053666e+05, 6532 iterations, 0.57 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 905366.638 0 4 - 905366.638 - - 1s H 0 0 1167852.4821 905366.638 22.5% - 1s H 0 0 927917.55197 905366.638 2.43% - 2s 0 0 905396.739 0 4 927917.552 905396.739 2.43% - 2s 0 0 905443.098 0 4 927917.552 905443.098 2.42% - 2s 0 0 905444.112 0 4 927917.552 905444.112 2.42% - 3s 0 0 905450.337 0 4 927917.552 905450.337 2.42% - 3s 0 0 905450.337 0 4 927917.552 905450.337 2.42% - 4s 0 0 905455.558 0 4 927917.552 905455.558 2.42% - 4s 0 0 905459.893 0 4 927917.552 905459.893 2.42% - 4s 0 0 905461.286 0 4 927917.552 905461.286 2.42% - 5s 0 0 905461.428 0 4 927917.552 905461.428 2.42% - 5s 0 0 905462.165 0 4 927917.552 905462.165 2.42% - 5s 0 0 905462.595 0 4 927917.552 905462.595 2.42% - 6s 0 0 905462.595 0 4 927917.552 905462.595 2.42% - 6s 0 2 905462.595 0 4 927917.552 905462.595 2.42% - 7s 3 5 907882.074 2 4 927917.552 905753.258 2.39% 777 10s 23 25 910571.996 12 2 927917.552 906347.749 2.32% 299 15s 52 52 908003.795 26 2 927917.552 906347.749 2.32% 197 20s H 54 24 910000.38435 906347.749 0.40% 190 20s * 56 14 28 908013.94925 906347.749 0.18% 190 20s 77 12 cutoff 4 908013.949 907292.733 0.08% 177 25s Cutting planes: Implied bound: 8 Flow cover: 22 Explored 106 nodes (24619 simplex iterations) in 26.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.080139492532e+05, best bound 9.079723940132e+05, gap 0.0046%