Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:35:43 2013 Optimize a model with 1400 rows, 102300 columns and 206400 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.26s Presolved: 1300 rows, 102200 columns, 204300 nonzeros Variable types: 102200 continuous, 0 integer (0 binary) Root relaxation: objective 8.570461e+05, 8788 iterations, 0.96 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 857046.104 0 1 - 857046.104 - - 1s H 0 0 925447.43800 857046.104 7.39% - 2s 0 2 857046.104 0 1 925447.438 857046.104 7.39% - 2s 7 9 862774.600 4 1 925447.438 858246.035 7.26% 297 5s 27 29 870891.201 14 2 925447.438 858246.035 7.26% 235 10s 54 56 860235.246 27 1 925447.438 858246.035 7.26% 180 15s * 73 73 37 895811.73760 858246.035 4.19% 158 18s * 79 61 40 872121.37626 858246.035 1.59% 148 18s 99 69 867374.461 50 1 872121.376 858246.035 1.59% 123 20s * 103 47 52 866383.22778 858246.035 0.94% 120 20s * 121 35 61 865341.69340 858246.035 0.82% 107 21s 184 46 864368.907 92 1 865341.693 858246.035 0.82% 74.5 25s * 264 50 132 865297.08290 858246.035 0.81% 53.3 27s 285 63 858783.781 12 1 865297.083 858246.035 0.81% 55.6 30s * 316 12 28 859254.01295 858246.035 0.12% 52.2 32s * 322 8 31 859247.37396 858246.035 0.12% 51.4 32s 383 11 858924.368 9 1 859247.374 858797.976 0.05% 47.4 35s * 434 10 24 859152.84787 858797.976 0.04% 42.8 36s * 463 27 40 859009.72854 858915.149 0.01% 40.2 36s Explored 468 nodes (27398 simplex iterations) in 36.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.590097285444e+05, best bound 8.589366879433e+05, gap 0.0085%