Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:05:23 2012 Optimize a model with 10799 rows, 3660 columns and 35758 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.27s Presolved: 10857 rows, 3658 columns, 38998 nonzeros Variable types: 0 continuous, 3658 integer (3658 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 2.000000e+00, 2741 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 120 60.00000 2.00000 96.7% - 0s H 0 0 57.0000000 2.00000 96.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 220 5.00000 2.66667 46.7% - 1s 0 0 2.67442 0 3301 5.00000 2.67442 46.5% - 2s 0 0 2.67442 0 3312 5.00000 2.67442 46.5% - 3s 0 0 2.67442 0 2944 5.00000 2.67442 46.5% - 5s 0 0 2.67442 0 2877 5.00000 2.67442 46.5% - 6s 0 0 2.67442 0 2858 5.00000 2.67442 46.5% - 7s 0 0 2.67442 0 2799 5.00000 2.67442 46.5% - 8s 0 0 2.67442 0 2837 5.00000 2.67442 46.5% - 9s 0 0 2.67442 0 2843 5.00000 2.67442 46.5% - 10s 0 0 2.67442 0 2820 5.00000 2.67442 46.5% - 12s 0 0 2.67442 0 2856 5.00000 2.67442 46.5% - 13s H 0 0 4.0000000 2.67442 33.1% - 13s 0 0 2.67442 0 2869 4.00000 2.67442 33.1% - 14s 0 0 2.67442 0 2869 4.00000 2.67442 33.1% - 15s 0 1 3.00000 0 2869 4.00000 3.00000 25.0% - 18s Cutting planes: Clique: 101 Zero half: 5 Explored 10 nodes (44115 simplex iterations) in 18.84 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%