Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:47:19 2013 Optimize a model with 11600 rows, 120300 columns and 270500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.53s Presolved: 11500 rows, 120200 columns, 260400 nonzeros Variable types: 110200 continuous, 10000 integer (10000 binary) Root relaxation: objective 9.053666e+05, 10798 iterations, 0.74 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 0 0 905443.068 0 4 - 905443.068 - - 2s 0 0 905460.240 0 4 - 905460.240 - - 3s 0 0 905462.750 0 4 - 905462.750 - - 3s 0 0 905467.310 0 4 - 905467.310 - - 3s 0 0 905467.310 0 4 - 905467.310 - - 4s 0 0 905467.859 0 4 - 905467.859 - - 4s 0 0 905467.859 0 4 - 905467.859 - - 4s 0 0 905467.859 0 4 - 905467.859 - - 5s 0 0 905467.859 0 4 - 905467.859 - - 6s H 0 0 911574.40526 905467.859 0.67% - 6s 0 2 905467.859 0 4 911574.405 905467.859 0.67% - 8s 3 5 907882.074 2 4 911574.405 905753.258 0.64% 809 10s 20 18 907821.047 12 2 911574.405 906347.749 0.57% 304 15s 52 29 909090.763 33 2 911574.405 906347.749 0.57% 153 20s H 54 12 908030.30218 906347.749 0.19% 148 20s * 95 9 74 908018.35356 906347.749 0.18% 89.3 23s 102 12 906711.736 4 2 908018.354 906347.749 0.18% 90.2 25s 126 12 907963.306 27 4 908018.354 906347.749 0.18% 88.3 30s Cutting planes: Implied bound: 35 Flow cover: 13 Explored 159 nodes (28112 simplex iterations) in 32.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.080183535562e+05, best bound 9.079362137297e+05, gap 0.0090%