Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:08:06 2012 Optimize a model with 9119 rows, 3306 columns and 30379 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.21s Presolved: 9117 rows, 3304 columns, 30059 nonzeros Variable types: 0 continuous, 3304 integer (3304 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 2.000000e+00, 2183 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 114 57.00000 2.00000 96.5% - 0s H 0 0 56.0000000 2.00000 96.4% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 2348 5.00000 2.66667 46.7% - 1s H 0 0 4.0000000 2.66667 33.3% - 1s 0 0 2.66667 0 833 4.00000 2.66667 33.3% - 2s 0 0 2.66667 0 2768 4.00000 2.66667 33.3% - 2s 0 0 2.66667 0 367 4.00000 2.66667 33.3% - 7s 0 0 2.69182 0 2465 4.00000 2.69182 32.7% - 10s 0 0 2.69182 0 2654 4.00000 2.69182 32.7% - 11s 0 0 2.69182 0 2593 4.00000 2.69182 32.7% - 14s 0 0 2.69182 0 2470 4.00000 2.69182 32.7% - 16s 0 0 2.69182 0 2584 4.00000 2.69182 32.7% - 18s 0 0 2.69182 0 2594 4.00000 2.69182 32.7% - 21s 0 0 2.69182 0 2433 4.00000 2.69182 32.7% - 23s 0 0 2.69182 0 2537 4.00000 2.69182 32.7% - 25s 0 0 2.69182 0 2537 4.00000 2.69182 32.7% - 26s 0 1 3.00000 0 2537 4.00000 3.00000 25.0% - 35s Cutting planes: Clique: 124 Zero half: 14 Explored 22 nodes (105951 simplex iterations) in 36.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%