Gurobi 5.0.1 (linux64) logging started Sun Dec 9 06:11:30 2012 Optimize a model with 570 rows, 540 columns and 1789 nonzeros Presolve removed 28 rows and 17 columns Presolve time: 0.01s Presolved: 542 rows, 523 columns, 1721 nonzeros Variable types: 349 continuous, 174 integer (174 binary) Root relaxation: objective 5.247878e+04, 267 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52478.7831 0 87 - 52478.7831 - - 0s H 0 0 83460.000000 52478.7831 37.1% - 0s 0 0 62457.0263 0 39 83460.0000 62457.0263 25.2% - 0s 0 0 63040.5611 0 27 83460.0000 63040.5611 24.5% - 0s 0 0 63082.3655 0 16 83460.0000 63082.3655 24.4% - 0s 0 0 63091.2380 0 13 83460.0000 63091.2380 24.4% - 0s 0 0 63095.7015 0 14 83460.0000 63095.7015 24.4% - 0s H 0 0 63792.000000 63095.7015 1.09% - 0s 0 2 63095.7621 0 14 63792.0000 63095.7621 1.09% - 0s H 27 27 63597.000000 63098.2013 0.78% 3.1 0s * 32 26 25 63563.000000 63098.2013 0.73% 3.4 0s H 54 40 63520.000000 63112.9391 0.64% 3.2 0s H 66 35 63431.000000 63121.3432 0.49% 3.1 1s * 96 48 35 63386.000000 63121.3432 0.42% 3.2 1s * 264 115 15 63364.000000 63181.5983 0.29% 3.8 3s 332 143 63315.3233 7 6 63364.0000 63193.6720 0.27% 3.8 5s * 368 132 18 63348.000000 63212.1537 0.21% 3.8 5s H 485 128 63333.000000 63240.1772 0.15% 3.9 7s 639 126 63305.3650 20 2 63333.0000 63274.9105 0.09% 3.8 10s Cutting planes: Gomory: 16 Flow cover: 81 Flow path: 53 Explored 839 nodes (3491 simplex iterations) in 13.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.333300000000e+04, best bound 6.332685384433e+04, gap 0.0097%