Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:09:03 2012 Optimize a model with 9974 rows, 3306 columns and 32944 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.24s Presolved: 9972 rows, 3304 columns, 32594 nonzeros Variable types: 0 continuous, 3304 integer (3304 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 2.000000e+00, 2217 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 0 114 57.00000 2.00000 96.5% - 0s H 0 0 55.0000000 2.00000 96.4% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 156 5.00000 2.66667 46.7% - 1s 0 0 2.67073 0 2903 5.00000 2.67073 46.6% - 1s 0 0 2.67073 0 2902 5.00000 2.67073 46.6% - 3s 0 0 2.67073 0 2901 5.00000 2.67073 46.6% - 3s 0 0 2.67073 0 2908 5.00000 2.67073 46.6% - 4s 0 0 2.67073 0 2778 5.00000 2.67073 46.6% - 7s 0 0 2.67073 0 2628 5.00000 2.67073 46.6% - 10s 0 0 2.67073 0 2689 5.00000 2.67073 46.6% - 12s 0 0 2.67073 0 2728 5.00000 2.67073 46.6% - 15s 0 0 2.67073 0 2633 5.00000 2.67073 46.6% - 18s 0 0 2.67073 0 2570 5.00000 2.67073 46.6% - 21s 0 0 2.67073 0 2595 5.00000 2.67073 46.6% - 24s 0 0 2.67073 0 2643 5.00000 2.67073 46.6% - 27s 0 0 2.67073 0 2586 5.00000 2.67073 46.6% - 29s 0 2 2.80000 0 2586 5.00000 2.80000 44.0% - 33s 13 1 cutoff 1 5.00000 3.00000 40.0% 929 35s H 27 3 4.0000000 4.00000 0.0% 623 36s Cutting planes: Clique: 80 Zero half: 13 Explored 27 nodes (107997 simplex iterations) in 36.34 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%