Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:51:59 2013 Optimize a model with 2800 rows, 111000 columns and 292500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.51s Presolved: 2700 rows, 110900 columns, 282400 nonzeros Variable types: 110200 continuous, 700 integer (700 binary) Root relaxation: objective 7.543716e+05, 5729 iterations, 0.75 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 754371.571 0 12 - 754371.571 - - 1s 0 0 754419.452 0 9 - 754419.452 - - 2s 0 0 754431.695 0 13 - 754431.695 - - 2s 0 0 754435.893 0 13 - 754435.893 - - 3s 0 0 754442.597 0 11 - 754442.597 - - 3s 0 0 754443.188 0 13 - 754443.188 - - 3s 0 0 754443.581 0 13 - 754443.581 - - 4s 0 0 754446.356 0 13 - 754446.356 - - 5s 0 0 754447.439 0 13 - 754447.439 - - 5s 0 0 754448.965 0 13 - 754448.965 - - 6s 0 0 754450.640 0 13 - 754450.640 - - 6s 0 0 754450.958 0 13 - 754450.958 - - 6s 0 0 754451.810 0 16 - 754451.810 - - 7s 0 0 754451.847 0 16 - 754451.847 - - 8s 0 0 754451.847 0 16 - 754451.847 - - 10s H 0 0 757701.44705 754451.847 0.43% - 11s 0 2 754456.860 0 16 757701.447 754456.860 0.43% - 12s 7 9 755070.021 6 3 757701.447 754663.962 0.40% 257 15s 28 17 755452.303 27 3 757701.447 754663.962 0.40% 76.1 20s 48 19 755844.487 47 1 757701.447 754663.962 0.40% 51.2 25s 78 22 756958.958 77 1 757701.447 754663.962 0.40% 37.1 30s 139 32 754806.845 4 6 757701.447 754716.705 0.39% 27.3 35s 178 57 755649.671 40 3 757701.447 754716.705 0.39% 29.8 40s H 189 37 755699.50225 754716.705 0.13% 28.4 42s 214 41 cutoff 6 755699.502 754836.240 0.11% 35.1 45s 282 46 755349.363 4 3 755699.502 755182.508 0.07% 46.3 50s 353 23 755557.373 9 3 755699.502 755539.363 0.02% 46.2 55s Cutting planes: Flow cover: 30 Explored 368 nodes (24998 simplex iterations) in 55.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.556995022485e+05, best bound 7.556257027981e+05, gap 0.0098%