Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:47:31 2012 Optimize a model with 10560 rows, 3540 columns and 34926 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.25s Presolved: 10617 rows, 3538 columns, 38049 nonzeros Variable types: 0 continuous, 3538 integer (3538 binary) Found heuristic solution: objective 59.0000000 Root relaxation: objective 2.000000e+00, 2580 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 0 118 59.00000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 885 5.00000 2.66667 46.7% - 1s 0 0 2.67059 0 3057 5.00000 2.67059 46.6% - 2s 0 0 2.67059 0 3073 5.00000 2.67059 46.6% - 3s 0 0 2.67059 0 2718 5.00000 2.67059 46.6% - 7s 0 0 2.67059 0 2637 5.00000 2.67059 46.6% - 11s 0 0 2.67059 0 2658 5.00000 2.67059 46.6% - 14s 0 0 2.67059 0 2748 5.00000 2.67059 46.6% - 16s 0 0 2.67059 0 2770 5.00000 2.67059 46.6% - 19s 0 0 2.67059 0 2720 5.00000 2.67059 46.6% - 22s 0 0 2.67059 0 2608 5.00000 2.67059 46.6% - 25s 0 0 2.67059 0 2690 5.00000 2.67059 46.6% - 28s 0 0 2.67059 0 2690 5.00000 2.67059 46.6% - 30s 0 2 2.80000 0 2690 5.00000 2.80000 44.0% - 38s * 19 4 12 4.0000000 3.00000 25.0% 616 39s 23 0 cutoff 1 4.00000 4.00000 0.0% 756 40s Cutting planes: Clique: 51 Zero half: 13 Explored 24 nodes (113209 simplex iterations) in 40.45 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%