Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:34:48 2013 Optimize a model with 2400 rows, 102800 columns and 215900 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.38s Presolved: 2300 rows, 102700 columns, 213800 nonzeros Variable types: 102200 continuous, 500 integer (500 binary) Root relaxation: objective 9.053666e+05, 5946 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 905366.638 0 6 - 905366.638 - - 0s H 0 0 1167852.4821 905366.638 22.5% - 1s H 0 0 927917.55197 905366.638 2.43% - 1s 0 0 905392.238 0 6 927917.552 905392.238 2.43% - 1s 0 0 905433.271 0 6 927917.552 905433.271 2.42% - 2s 0 0 905433.271 0 6 927917.552 905433.271 2.42% - 2s 0 0 905445.364 0 6 927917.552 905445.364 2.42% - 2s 0 0 905452.581 0 6 927917.552 905452.581 2.42% - 2s 0 0 905452.581 0 6 927917.552 905452.581 2.42% - 3s 0 0 905455.505 0 6 927917.552 905455.505 2.42% - 3s 0 0 905455.505 0 6 927917.552 905455.505 2.42% - 3s 0 0 905457.077 0 6 927917.552 905457.077 2.42% - 4s 0 0 905457.333 0 6 927917.552 905457.333 2.42% - 4s 0 0 905457.978 0 6 927917.552 905457.978 2.42% - 4s 0 0 905458.824 0 6 927917.552 905458.824 2.42% - 5s 0 0 905458.824 0 6 927917.552 905458.824 2.42% - 6s H 0 0 910176.25595 905458.824 0.52% - 6s 0 2 905465.640 0 6 910176.256 905465.640 0.52% - 7s 8 5 907513.412 8 3 910176.256 906249.388 0.43% 173 10s * 26 9 26 908013.94925 906249.388 0.19% 73.2 12s 34 11 906840.654 5 3 908013.949 906840.654 0.13% 90.6 15s Cutting planes: Flow cover: 21 Explored 85 nodes (16395 simplex iterations) in 19.55 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%