Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:01:05 2012 Optimize a model with 9899 rows, 3660 columns and 33058 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.25s Presolved: 9897 rows, 3658 columns, 32728 nonzeros Variable types: 0 continuous, 3658 integer (3658 binary) Found heuristic solution: objective 59.0000000 Root relaxation: objective 2.000000e+00, 2617 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 120 59.00000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s H 0 0 4.0000000 2.00000 50.0% - 0s 0 0 2.66667 0 3009 4.00000 2.66667 33.3% - 1s 0 0 2.66667 0 1694 4.00000 2.66667 33.3% - 2s 0 0 2.66667 0 2102 4.00000 2.66667 33.3% - 3s 0 0 2.66667 0 186 4.00000 2.66667 33.3% - 8s 0 0 2.67442 0 2759 4.00000 2.67442 33.1% - 11s 0 0 2.67442 0 2774 4.00000 2.67442 33.1% - 12s 0 0 2.67442 0 2845 4.00000 2.67442 33.1% - 16s 0 0 2.67442 0 2818 4.00000 2.67442 33.1% - 20s 0 0 2.67442 0 2808 4.00000 2.67442 33.1% - 24s 0 0 2.67442 0 2816 4.00000 2.67442 33.1% - 26s 0 0 2.67442 0 2810 4.00000 2.67442 33.1% - 30s 0 0 2.67442 0 2810 4.00000 2.67442 33.1% - 33s 0 1 3.00000 0 2810 4.00000 3.00000 25.0% - 45s Cutting planes: Clique: 76 Zero half: 8 Explored 14 nodes (114734 simplex iterations) in 47.43 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%