Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:48:41 2012 Optimize a model with 12771 rows, 3906 columns and 41910 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.35s Presolved: 12769 rows, 3904 columns, 41498 nonzeros Variable types: 0 continuous, 3904 integer (3904 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 2.000000e+00, 2708 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 124 62.00000 2.00000 96.8% - 0s H 0 0 49.0000000 2.00000 95.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 169 5.00000 2.66667 46.7% - 2s 0 0 2.67039 0 3670 5.00000 2.67039 46.6% - 2s 0 0 2.67039 0 3650 5.00000 2.67039 46.6% - 3s 0 0 2.67039 0 3655 5.00000 2.67039 46.6% - 3s 0 0 2.67039 0 3452 5.00000 2.67039 46.6% - 5s 0 0 2.67039 0 3430 5.00000 2.67039 46.6% - 7s 0 0 2.67039 0 3463 5.00000 2.67039 46.6% - 9s 0 0 2.67039 0 3477 5.00000 2.67039 46.6% - 10s 0 0 2.67039 0 3494 5.00000 2.67039 46.6% - 12s 0 0 2.67039 0 3498 5.00000 2.67039 46.6% - 14s 0 0 2.67039 0 3498 5.00000 2.67039 46.6% - 14s 0 2 2.80000 0 3498 5.00000 2.80000 44.0% - 22s 11 3 4.00000 2 104 5.00000 3.00000 40.0% 1134 25s * 29 3 16 4.0000000 3.00000 25.0% 512 26s Cutting planes: Clique: 98 Zero half: 5 Explored 33 nodes (63286 simplex iterations) in 28.65 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%