Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:05:52 2013 Optimize a model with 2100 rows, 101300 columns and 204000 nonzeros Presolve removed 200 rows and 200 columns Presolve time: 0.68s Presolved: 1900 rows, 101100 columns, 203300 nonzeros Variable types: 100700 continuous, 400 integer (400 binary) Root relaxation: objective 9.053666e+05, 6561 iterations, 0.79 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 - - 1s H 0 0 969595.08113 905366.638 6.62% - 1s 0 0 905393.238 0 2 969595.081 905393.238 6.62% - 2s 0 0 905437.018 0 2 969595.081 905437.018 6.62% - 2s 0 0 905437.018 0 2 969595.081 905437.018 6.62% - 3s 0 0 905437.187 0 2 969595.081 905437.187 6.62% - 3s 0 0 905440.285 0 2 969595.081 905440.285 6.62% - 4s 0 0 905445.405 0 2 969595.081 905445.405 6.62% - 4s 0 0 905450.491 0 2 969595.081 905450.491 6.62% - 4s 0 0 905451.652 0 2 969595.081 905451.652 6.62% - 5s 0 0 905454.126 0 2 969595.081 905454.126 6.62% - 5s 0 0 905455.850 0 2 969595.081 905455.850 6.62% - 5s 0 0 905455.914 0 2 969595.081 905455.914 6.62% - 6s 0 0 905456.624 0 2 969595.081 905456.624 6.61% - 6s 0 0 905456.968 0 2 969595.081 905456.968 6.61% - 7s 0 0 905456.968 0 2 969595.081 905456.968 6.61% - 8s 0 2 905463.053 0 2 969595.081 905463.053 6.61% - 9s 3 5 906252.832 3 1 969595.081 906252.832 6.53% 203 10s * 19 8 19 907989.63518 906252.832 0.19% 73.9 13s 26 10 907071.254 6 1 907989.635 906841.866 0.13% 101 15s 61 8 907648.915 5 1 907989.635 907648.915 0.04% 109 20s Cutting planes: Flow cover: 23 Explored 73 nodes (15956 simplex iterations) in 21.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.079896351764e+05, best bound 9.079723940132e+05, gap 0.0019%