Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:21:48 2013 Optimize a model with 2800 rows, 126500 columns and 401500 nonzeros Presolve removed 100 rows and 5700 columns Presolve time: 0.51s Presolved: 2700 rows, 120800 columns, 381500 nonzeros Variable types: 120100 continuous, 700 integer (700 binary) Root relaxation: objective 7.543716e+05, 6386 iterations, 0.51 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 754371.571 0 16 - 754371.571 - - 1s 0 0 754416.553 0 12 - 754416.553 - - 1s 0 0 754429.713 0 12 - 754429.713 - - 2s 0 0 754434.342 0 12 - 754434.342 - - 2s 0 0 754435.673 0 12 - 754435.673 - - 2s 0 0 754436.902 0 12 - 754436.902 - - 3s 0 0 754437.071 0 12 - 754437.071 - - 3s 0 0 754438.643 0 12 - 754438.643 - - 3s 0 0 754438.889 0 12 - 754438.889 - - 4s 0 0 754439.387 0 12 - 754439.387 - - 4s 0 0 754440.070 0 12 - 754440.070 - - 5s 0 0 754441.984 0 12 - 754441.984 - - 5s 0 0 754442.231 0 12 - 754442.231 - - 6s 0 0 754442.729 0 12 - 754442.729 - - 6s 0 0 754442.976 0 12 - 754442.976 - - 6s 0 0 754443.519 0 12 - 754443.519 - - 7s 0 0 754443.519 0 12 - 754443.519 - - 9s H 0 0 757960.97996 754443.519 0.46% - 9s 0 2 754451.471 0 12 757960.980 754451.471 0.46% - 11s 21 22 755048.102 21 5 757960.980 754534.362 0.45% 77.7 15s 50 36 755660.766 47 4 757960.980 754534.362 0.45% 45.3 20s H 54 32 755699.50225 754534.362 0.15% 42.1 21s 117 70 755615.600 57 4 755699.502 754778.285 0.12% 32.3 25s 193 84 755558.052 15 9 755699.502 755014.732 0.09% 46.5 30s 264 74 cutoff 10 755699.502 755220.436 0.06% 54.0 35s 379 39 755638.429 38 4 755699.502 755539.363 0.02% 47.4 40s H 439 22 755696.43566 755602.622 0.01% 42.2 41s H 466 25 755693.26978 755616.342 0.01% 40.1 42s Cutting planes: Flow cover: 27 Explored 480 nodes (30146 simplex iterations) in 42.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.556932697793e+05, best bound 7.556199579837e+05, gap 0.0097%