Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:04:03 2013 Optimize a model with 2140 rows, 7020 columns and 18010 nonzeros Presolve removed 20 rows and 30 columns Presolve time: 0.18s Presolved: 2120 rows, 6990 columns, 13980 nonzeros Variable types: 5000 continuous, 1990 integer (1990 binary) Root relaxation: objective 1.997658e+04, 131 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19976.5790 0 2 - 19976.5790 - - 0s 0 0 19978.3310 0 4 - 19978.3310 - - 0s 0 0 19978.8300 0 4 - 19978.8300 - - 0s 0 0 19979.3535 0 4 - 19979.3535 - - 0s 0 0 19979.3535 0 4 - 19979.3535 - - 0s 0 2 19982.0960 0 4 - 19982.0960 - - 0s * 224 114 222 20295.205206 20069.9019 1.11% 1.3 1s * 260 126 69 20188.144527 20069.9132 0.59% 1.3 1s * 469 144 70 20187.623473 20071.7311 0.57% 1.4 1s * 470 143 69 20187.466597 20071.7311 0.57% 1.4 1s * 572 145 70 20186.775296 20073.1765 0.56% 1.4 1s * 648 142 70 20186.072258 20073.8884 0.56% 1.5 1s * 747 147 71 20185.357998 20075.2910 0.55% 1.5 1s * 843 152 71 20184.629661 20076.6657 0.53% 1.5 1s * 939 155 71 20184.006045 20078.3030 0.52% 1.5 1s * 1034 157 72 20183.558369 20080.2332 0.51% 1.5 1s * 1098 160 73 20183.319210 20081.1884 0.51% 1.5 1s * 1099 157 72 20183.099136 20081.1884 0.50% 1.5 1s * 1191 164 73 20182.627921 20083.0548 0.49% 1.5 1s * 1287 168 74 20182.525713 20084.5946 0.49% 1.5 2s * 1288 163 73 20182.142852 20084.5946 0.48% 1.5 2s * 1348 166 74 20181.696526 20085.8666 0.47% 1.5 2s * 1349 164 73 20181.647158 20085.8666 0.47% 1.5 2s * 1437 166 74 20181.136698 20087.6418 0.46% 1.5 2s H 1441 156 20178.014727 20088.7964 0.44% 1.5 2s * 1782 175 37 20172.957884 20140.1434 0.16% 2.0 3s * 1792 136 21 20159.743458 20141.2936 0.09% 2.0 3s * 2091 57 58 20158.810385 20143.9154 0.07% 2.0 3s * 2142 52 46 20158.556800 20144.9362 0.07% 2.0 3s * 2155 50 56 20158.535950 20144.9362 0.07% 2.0 3s * 2904 134 66 20158.451417 20152.3180 0.03% 2.1 4s Cutting planes: Gomory: 2 Flow cover: 4 Explored 3287 nodes (7196 simplex iterations) in 4.87 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.015845141674e+04, best bound 2.015646868654e+04, gap 0.0098%