Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:20:21 2012 Optimize a model with 11040 rows, 3782 columns and 36598 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.29s Presolved: 11038 rows, 3780 columns, 36236 nonzeros Variable types: 0 continuous, 3780 integer (3780 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2725 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 0 122 61.00000 2.00000 96.7% - 0s H 0 0 59.0000000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 173 5.00000 2.66667 46.7% - 1s 0 0 2.67045 0 3344 5.00000 2.67045 46.6% - 2s 0 0 2.67045 0 3308 5.00000 2.67045 46.6% - 3s 0 0 2.67045 0 3289 5.00000 2.67045 46.6% - 4s 0 0 2.67045 0 3291 5.00000 2.67045 46.6% - 4s 0 0 2.67045 0 3019 5.00000 2.67045 46.6% - 6s 0 0 2.67045 0 3030 5.00000 2.67045 46.6% - 9s 0 0 2.67045 0 2961 5.00000 2.67045 46.6% - 10s 0 0 2.67045 0 2950 5.00000 2.67045 46.6% - 12s 0 0 2.67045 0 2925 5.00000 2.67045 46.6% - 14s 0 0 2.67045 0 2905 5.00000 2.67045 46.6% - 16s 0 0 2.67045 0 2818 5.00000 2.67045 46.6% - 17s 0 0 2.67045 0 3038 5.00000 2.67045 46.6% - 19s 0 0 2.67045 0 3111 5.00000 2.67045 46.6% - 21s 0 0 2.67045 0 3014 5.00000 2.67045 46.6% - 23s 0 0 2.67045 0 3031 5.00000 2.67045 46.6% - 25s 0 0 2.67045 0 2982 5.00000 2.67045 46.6% - 26s 0 2 2.80000 0 2982 5.00000 2.80000 44.0% - 31s * 20 5 12 4.0000000 3.00000 25.0% 524 32s Cutting planes: Clique: 79 Zero half: 15 Explored 26 nodes (93490 simplex iterations) in 33.96 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%