Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:40 2012 Optimize a model with 2372 rows, 462 columns and 7474 nonzeros Presolve removed 889 rows and 2 columns Presolve time: 0.06s Presolved: 1504 rows, 460 columns, 7771 nonzeros Variable types: 0 continuous, 460 integer (460 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 4.000000e+00, 1016 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4.00000 0 84 21.00000 4.00000 81.0% - 0s H 0 0 16.0000000 4.00000 75.0% - 0s 0 0 4.13889 0 150 16.00000 4.13889 74.1% - 0s H 0 0 8.0000000 4.13889 48.3% - 0s H 0 0 7.0000000 4.13889 40.9% - 0s 0 0 4.15480 0 151 7.00000 4.15480 40.6% - 0s H 0 0 6.0000000 4.15480 30.8% - 0s 0 0 4.15562 0 455 6.00000 4.15562 30.7% - 0s 0 0 4.16347 0 349 6.00000 4.16347 30.6% - 0s 0 0 4.16611 0 459 6.00000 4.16611 30.6% - 0s 0 0 4.16877 0 459 6.00000 4.16877 30.5% - 0s 0 0 4.17743 0 437 6.00000 4.17743 30.4% - 0s 0 0 4.18813 0 455 6.00000 4.18813 30.2% - 0s 0 0 4.19092 0 454 6.00000 4.19092 30.2% - 0s 0 0 4.19416 0 451 6.00000 4.19416 30.1% - 1s 0 0 4.19583 0 456 6.00000 4.19583 30.1% - 1s 0 0 4.19583 0 451 6.00000 4.19583 30.1% - 1s 0 2 4.19584 0 451 6.00000 4.19584 30.1% - 1s Cutting planes: Gomory: 1 Clique: 2 Zero half: 25 Explored 219 nodes (35289 simplex iterations) in 3.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%