Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:41:45 2012 Optimize a model with 10029 rows, 3540 columns and 33333 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.25s Presolved: 10027 rows, 3538 columns, 32993 nonzeros Variable types: 0 continuous, 3538 integer (3538 binary) Found heuristic solution: objective 59.0000000 Root relaxation: objective 2.000000e+00, 2518 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 0 118 59.00000 2.00000 96.6% - 0s H 0 0 52.0000000 2.00000 96.2% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 154 5.00000 2.66667 46.7% - 1s 0 0 2.67059 0 3089 5.00000 2.67059 46.6% - 1s 0 0 2.67059 0 3111 5.00000 2.67059 46.6% - 3s 0 0 2.67059 0 2874 5.00000 2.67059 46.6% - 7s 0 0 2.67059 0 2716 5.00000 2.67059 46.6% - 10s 0 0 2.67059 0 2586 5.00000 2.67059 46.6% - 12s 0 0 2.67059 0 2668 5.00000 2.67059 46.6% - 15s 0 0 2.67059 0 2576 5.00000 2.67059 46.6% - 18s 0 0 2.67059 0 2779 5.00000 2.67059 46.6% - 21s 0 0 2.67059 0 2785 5.00000 2.67059 46.6% - 24s 0 0 2.67059 0 2726 5.00000 2.67059 46.6% - 27s 0 0 2.67059 0 2617 5.00000 2.67059 46.6% - 29s 0 0 2.67059 0 2703 5.00000 2.67059 46.6% - 31s 0 0 2.67059 0 2703 5.00000 2.67059 46.6% - 33s 0 2 2.80000 0 2703 5.00000 2.80000 44.0% - 39s 5 5 3.00000 3 108 5.00000 3.00000 40.0% 1367 40s * 32 3 20 4.0000000 4.00000 0.0% 514 42s Cutting planes: Clique: 69 Zero half: 13 Explored 33 nodes (124204 simplex iterations) in 42.22 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%