Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:34:40 2013 Optimize a model with 1500 rows, 35550 columns and 151400 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 0.20s Presolved: 1450 rows, 35500 columns, 141350 nonzeros Variable types: 35100 continuous, 400 integer (400 binary) Root relaxation: objective 2.198499e+05, 2592 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 219849.939 0 6 - 219849.939 - - 0s 0 0 219854.091 0 6 - 219854.091 - - 0s 0 0 219855.543 0 8 - 219855.543 - - 0s 0 0 219855.543 0 8 - 219855.543 - - 0s 0 0 219856.242 0 8 - 219856.242 - - 0s 0 0 219856.657 0 9 - 219856.657 - - 0s 0 0 219856.844 0 9 - 219856.844 - - 0s 0 0 219856.881 0 9 - 219856.881 - - 1s 0 0 219856.881 0 9 - 219856.881 - - 1s 0 2 219859.854 0 9 - 219859.854 - - 2s * 61 55 60 223291.54392 220220.935 1.38% 30.2 4s 77 64 222143.083 15 3 223291.544 220287.277 1.35% 32.1 5s H 174 131 222833.36052 220555.635 1.02% 19.2 5s * 191 133 71 222670.36942 220555.635 0.95% 17.8 5s * 283 143 52 222524.13138 220792.510 0.78% 22.1 7s H 310 132 222423.82126 220802.950 0.73% 21.8 8s * 314 132 39 222423.04907 220802.950 0.73% 21.5 8s * 360 141 46 222379.11076 220955.957 0.64% 24.6 8s H 393 138 222359.57564 221056.143 0.59% 25.0 9s * 404 109 39 222214.13702 221056.143 0.52% 24.6 9s H 447 77 222146.14343 221423.866 0.33% 26.0 9s * 467 66 37 222083.70307 221423.866 0.30% 25.1 9s 474 66 222029.112 15 3 222083.703 221435.988 0.29% 25.2 10s H 501 49 222062.26289 221590.147 0.21% 24.9 10s * 506 36 17 221990.67135 221590.147 0.18% 24.7 10s Cutting planes: Flow cover: 7 Explored 543 nodes (16468 simplex iterations) in 10.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.219906713538e+05, best bound 2.219703889480e+05, gap 0.0091%