Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:08:45 2012 Optimize a model with 10487 rows, 3306 columns and 34483 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.25s Presolved: 10485 rows, 3304 columns, 34115 nonzeros Variable types: 0 continuous, 3304 integer (3304 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 2.000000e+00, 2372 iterations, 0.06 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 54.0000000 2.00000 96.3% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 2773 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 654 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 2s 0 0 2.66667 0 634 4.00000 2.66667 33.3% - 2s 0 0 2.67901 0 2696 4.00000 2.67901 33.0% - 3s 0 0 2.67901 0 2676 4.00000 2.67901 33.0% - 4s 0 0 2.67901 0 2668 4.00000 2.67901 33.0% - 4s 0 0 2.67901 0 2678 4.00000 2.67901 33.0% - 5s 0 0 2.67901 0 2673 4.00000 2.67901 33.0% - 6s 0 0 2.67901 0 2667 4.00000 2.67901 33.0% - 7s 0 0 2.67901 0 2656 4.00000 2.67901 33.0% - 8s 0 0 2.67901 0 2391 4.00000 2.67901 33.0% - 10s 0 0 2.67901 0 2390 4.00000 2.67901 33.0% - 10s 0 0 2.67901 0 2344 4.00000 2.67901 33.0% - 11s 0 0 2.67901 0 2371 4.00000 2.67901 33.0% - 12s 0 0 2.67901 0 2391 4.00000 2.67901 33.0% - 13s 0 0 2.67901 0 2400 4.00000 2.67901 33.0% - 14s 0 0 2.67901 0 2400 4.00000 2.67901 33.0% - 15s 0 1 3.00000 0 2400 4.00000 3.00000 25.0% - 17s Cutting planes: Clique: 123 Zero half: 7 Explored 4 nodes (42036 simplex iterations) in 17.96 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%