Gurobi 5.0.1 (linux64) logging started Sat Dec 8 02:35:26 2012 Optimize a model with 285 rows, 270 columns and 890 nonzeros Presolve removed 20 rows and 12 columns Presolve time: 0.00s Presolved: 265 rows, 258 columns, 853 nonzeros Variable types: 172 continuous, 86 integer (86 binary) Root relaxation: objective 2.893718e+04, 147 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28937.1796 0 51 - 28937.1796 - - 0s H 0 0 46971.000000 28937.1796 38.4% - 0s 0 0 33007.7979 0 25 46971.0000 33007.7979 29.7% - 0s 0 0 33138.8906 0 19 46971.0000 33138.8906 29.4% - 0s 0 0 33168.1709 0 18 46971.0000 33168.1709 29.4% - 0s 0 0 33176.8925 0 32 46971.0000 33176.8925 29.4% - 0s 0 2 33179.4890 0 32 46971.0000 33179.4890 29.4% - 0s H 26 26 36322.715274 33206.1291 8.58% 8.8 0s H 27 24 34173.000000 33206.1291 2.83% 8.6 0s * 35 26 28 34141.000000 33206.1291 2.74% 7.1 0s H 138 68 34104.000000 33345.4965 2.22% 6.8 0s * 144 61 27 34072.000000 33345.4965 2.13% 6.6 0s * 221 73 17 34021.000000 33516.2538 1.48% 6.3 0s * 331 117 24 33977.000000 33573.2650 1.19% 6.0 1s * 433 103 13 33870.000000 33654.4754 0.64% 6.0 2s Cutting planes: Gomory: 11 Cover: 5 Flow cover: 48 Flow path: 25 Explored 836 nodes (4934 simplex iterations) in 4.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.387000000000e+04, best bound 3.386674632604e+04, gap 0.0096%