Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:21:45 2012 Optimize a model with 9395 rows, 2970 columns and 30886 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.20s Presolved: 9447 rows, 2968 columns, 33454 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 2.000000e+00, 2371 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 0 108 54.00000 2.00000 96.3% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 516 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 2458 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 290 5.00000 2.66667 46.7% - 6s 0 0 2.68421 0 2457 5.00000 2.68421 46.3% - 12s 0 0 2.68421 0 2545 5.00000 2.68421 46.3% - 13s 0 0 2.68421 0 2478 5.00000 2.68421 46.3% - 18s 0 0 2.68421 0 2523 5.00000 2.68421 46.3% - 22s 0 0 2.68421 0 2438 5.00000 2.68421 46.3% - 27s 0 0 2.68421 0 2536 5.00000 2.68421 46.3% - 33s 0 0 2.68421 0 2422 5.00000 2.68421 46.3% - 37s 0 0 2.68421 0 2495 5.00000 2.68421 46.3% - 42s 0 0 2.68421 0 2495 5.00000 2.68421 46.3% - 44s 0 2 3.00000 0 2495 5.00000 3.00000 40.0% - 53s H 27 3 4.0000000 3.66667 8.33% 562 54s Cutting planes: Clique: 122 Zero half: 4 Explored 27 nodes (146552 simplex iterations) in 54.82 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%