Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:20:54 2013 Optimize a model with 1400 rows, 120300 columns and 260400 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.19s Presolved: 1300 rows, 120200 columns, 240300 nonzeros Variable types: 120200 continuous, 0 integer (0 binary) Root relaxation: objective 8.570461e+05, 9000 iterations, 0.76 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 0 2 857046.104 0 1 - 857046.104 - - 2s 19 21 865635.219 10 1 - 858246.035 - 209 5s * 73 73 37 895811.73760 858246.035 4.19% 125 9s * 79 61 40 872121.37626 858246.035 1.59% 118 9s 84 64 861519.164 42 1 872121.376 858246.035 1.59% 113 10s * 103 47 52 866383.22778 858246.035 0.94% 96.3 10s 276 76 866045.420 138 1 866383.228 858246.035 0.94% 41.2 15s 367 115 859242.815 28 1 866383.228 858246.035 0.94% 43.1 20s * 380 12 35 859250.04541 858246.035 0.12% 42.6 20s * 500 10 28 859153.38127 858797.976 0.04% 36.7 23s * 533 31 44 859020.90062 858915.149 0.01% 34.6 24s Explored 538 nodes (27424 simplex iterations) in 24.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.590209006189e+05, best bound 8.589366879433e+05, gap 0.0098%