Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:03:09 2012 Optimize a model with 4991 rows, 2352 columns and 17086 nonzeros Presolve removed 530 rows and 2 columns Presolve time: 0.11s Presolved: 4509 rows, 2350 columns, 17956 nonzeros Variable types: 0 continuous, 2350 integer (2350 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 3.000000e+00, 3598 iterations, 0.32 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 156 48.00000 3.00000 93.8% - 1s H 0 0 39.0000000 3.00000 92.3% - 1s H 0 0 34.0000000 3.00000 91.2% - 1s H 0 0 7.0000000 3.00000 57.1% - 1s 0 0 3.00000 0 202 7.00000 3.00000 57.1% - 2s H 0 0 5.0000000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 70 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 73 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 70 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 76 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 73 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 44 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 86 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 79 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 68 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 99 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 98 4.00000 3.00000 25.0% - 13s 0 2 3.00000 0 79 4.00000 3.00000 25.0% - 15s 6 6 3.00000 1 48 4.00000 3.00000 25.0% 396 20s Cutting planes: Zero half: 11 Explored 28 nodes (170140 simplex iterations) in 24.95 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%