Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:26:00 2012 Optimize a model with 10091 rows, 3422 columns and 33406 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.24s Presolved: 10089 rows, 3420 columns, 33058 nonzeros Variable types: 0 continuous, 3420 integer (3420 binary) Found heuristic solution: objective 58.0000000 Root relaxation: objective 2.000000e+00, 2549 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 0 116 58.00000 2.00000 96.6% - 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 0 331 5.00000 2.66667 46.7% - 1s 0 0 2.68293 0 3071 5.00000 2.68293 46.3% - 2s 0 0 2.68293 0 3089 5.00000 2.68293 46.3% - 3s 0 0 2.68293 0 2873 5.00000 2.68293 46.3% - 7s 0 0 2.68293 0 2742 5.00000 2.68293 46.3% - 10s 0 0 2.68293 0 2716 5.00000 2.68293 46.3% - 14s 0 0 2.68293 0 2670 5.00000 2.68293 46.3% - 18s 0 0 2.68293 0 2642 5.00000 2.68293 46.3% - 21s 0 0 2.68293 0 2692 5.00000 2.68293 46.3% - 25s 0 0 2.68293 0 2704 5.00000 2.68293 46.3% - 28s 0 0 2.68293 0 2687 5.00000 2.68293 46.3% - 30s 0 0 2.68293 0 2721 5.00000 2.68293 46.3% - 33s 0 0 2.68293 0 2721 5.00000 2.68293 46.3% - 34s 0 2 3.00000 0 2721 5.00000 3.00000 40.0% - 40s * 12 6 10 4.0000000 3.00000 25.0% 976 41s Cutting planes: Clique: 144 Zero half: 10 Explored 22 nodes (117566 simplex iterations) in 42.31 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%