Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:10:39 2012 Optimize a model with 9119 rows, 3306 columns and 30379 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.20s Presolved: 9174 rows, 3304 columns, 33308 nonzeros Variable types: 0 continuous, 3304 integer (3304 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 2.000000e+00, 2229 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 55.0000000 2.00000 96.4% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 2289 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 1325 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 2s 0 0 2.66667 0 2404 4.00000 2.66667 33.3% - 2s 0 0 2.66667 0 134 4.00000 2.66667 33.3% - 5s 0 0 2.67073 0 2438 4.00000 2.67073 33.2% - 11s 0 0 2.67073 0 2654 4.00000 2.67073 33.2% - 11s 0 0 2.67073 0 2561 4.00000 2.67073 33.2% - 15s 0 0 2.67073 0 2653 4.00000 2.67073 33.2% - 18s 0 0 2.67073 0 2255 4.00000 2.67073 33.2% - 22s 0 0 2.67073 0 2456 4.00000 2.67073 33.2% - 25s 0 0 2.67073 0 2284 4.00000 2.67073 33.2% - 28s 0 0 2.67073 0 2435 4.00000 2.67073 33.2% - 31s 0 0 2.67073 0 2467 4.00000 2.67073 33.2% - 34s 0 0 2.67073 0 2467 4.00000 2.67073 33.2% - 36s 0 2 2.80000 0 2467 4.00000 2.80000 30.0% - 44s 5 5 3.00000 3 127 4.00000 3.00000 25.0% 1969 45s Cutting planes: Clique: 49 Zero half: 11 Explored 17 nodes (151567 simplex iterations) in 46.62 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%