Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:19:16 2012 Optimize a model with 3566 rows, 1722 columns and 12216 nonzeros Presolve removed 699 rows and 2 columns Presolve time: 0.12s Presolved: 2908 rows, 1720 columns, 12158 nonzeros Variable types: 0 continuous, 1720 integer (1720 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 3.000000e+00, 2472 iterations, 0.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 58 41.00000 3.00000 92.7% - 0s H 0 0 40.0000000 3.00000 92.5% - 0s H 0 0 8.0000000 3.00000 62.5% - 0s H 0 0 5.0000000 3.00000 40.0% - 0s 0 0 3.00000 0 64 5.00000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 42 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 81 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 83 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 52 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 408 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 46 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 44 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 65 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 65 4.00000 3.00000 25.0% - 6s 0 2 3.00000 0 65 4.00000 3.00000 25.0% - 6s 7 6 3.00000 1 72 4.00000 3.00000 25.0% 211 10s Cutting planes: Gomory: 8 Zero half: 10 Explored 16 nodes (109120 simplex iterations) in 14.48 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%