Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:30:44 2013 Optimize a model with 2324 rows, 576 columns and 7200 nonzeros Presolve removed 352 rows and 290 columns Presolve time: 0.02s Presolved: 1972 rows, 286 columns, 6189 nonzeros Variable types: 13 continuous, 273 integer (273 binary) Found heuristic solution: objective 8534.0000000 Root relaxation: objective 6.280655e+03, 1518 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 6280.65517 0 11 8534.00000 6280.65517 26.4% - 0s H 0 0 6301.0000000 6280.65517 0.32% - 0s H 0 0 6293.0000000 6280.65517 0.20% - 0s 0 0 6281.00000 0 21 6293.00000 6281.00000 0.19% - 0s 0 0 6281.00000 0 11 6293.00000 6281.00000 0.19% - 0s 0 0 6281.00000 0 21 6293.00000 6281.00000 0.19% - 0s 0 0 6281.00000 0 34 6293.00000 6281.00000 0.19% - 0s 0 0 6281.00000 0 17 6293.00000 6281.00000 0.19% - 0s 0 0 6281.00000 0 20 6293.00000 6281.00000 0.19% - 0s 0 0 6281.00000 0 27 6293.00000 6281.00000 0.19% - 0s 0 0 6281.00000 0 10 6293.00000 6281.00000 0.19% - 0s H 0 0 6292.0000000 6281.00000 0.17% - 0s 0 2 6281.00000 0 10 6292.00000 6281.00000 0.17% - 0s H 187 113 6291.0000000 6281.52632 0.15% 14.3 0s H 413 170 6290.0000000 6281.89300 0.13% 15.3 0s H 467 172 6289.0000000 6281.91468 0.11% 15.5 0s H 553 108 6287.0000000 6282.39412 0.07% 16.5 0s Cutting planes: Gomory: 4 Cover: 36 Implied bound: 63 Clique: 1 MIR: 38 Zero half: 6 Explored 913 nodes (17599 simplex iterations) in 0.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.287000000000e+03, best bound 6.287000000000e+03, gap 0.0%