Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:26:43 2012 Optimize a model with 10430 rows, 3782 columns and 34768 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.26s Presolved: 10489 rows, 3780 columns, 38147 nonzeros Variable types: 0 continuous, 3780 integer (3780 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2670 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 0 120 61.00000 2.00000 96.7% - 0s H 0 0 44.0000000 2.00000 95.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 150 5.00000 2.66667 46.7% - 1s 0 0 2.67045 0 3373 5.00000 2.67045 46.6% - 1s 0 0 2.67045 0 3370 5.00000 2.67045 46.6% - 3s 0 0 2.67045 0 3362 5.00000 2.67045 46.6% - 3s 0 0 2.67045 0 3349 5.00000 2.67045 46.6% - 4s 0 0 2.67045 0 3326 5.00000 2.67045 46.6% - 4s 0 0 2.67045 0 3345 5.00000 2.67045 46.6% - 5s 0 0 2.67045 0 3002 5.00000 2.67045 46.6% - 8s 0 0 2.67045 0 2989 5.00000 2.67045 46.6% - 10s 0 0 2.67045 0 3051 5.00000 2.67045 46.6% - 12s 0 0 2.67045 0 3107 5.00000 2.67045 46.6% - 13s 0 0 2.67045 0 3100 5.00000 2.67045 46.6% - 16s 0 0 2.67045 0 3065 5.00000 2.67045 46.6% - 17s 0 0 2.67045 0 3142 5.00000 2.67045 46.6% - 19s 0 0 2.67045 0 3126 5.00000 2.67045 46.6% - 21s 0 0 2.67045 0 2983 5.00000 2.67045 46.6% - 24s 0 0 2.67045 0 3058 5.00000 2.67045 46.6% - 25s 0 0 2.67045 0 3058 5.00000 2.67045 46.6% - 26s 0 2 2.80000 0 3058 5.00000 2.80000 44.0% - 31s * 25 4 14 4.0000000 3.00000 25.0% 618 34s 29 0 cutoff 1 4.00000 4.00000 0.0% 754 36s Cutting planes: Clique: 70 Zero half: 6 Explored 30 nodes (89130 simplex iterations) in 36.01 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%