Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:11:30 2012 Optimize a model with 12410 rows, 4032 columns and 40948 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.34s Presolved: 12471 rows, 4030 columns, 44523 nonzeros Variable types: 0 continuous, 4030 integer (4030 binary) Found heuristic solution: objective 63.0000000 Root relaxation: objective 2.000000e+00, 3012 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 63.00000 2.00000 96.8% - 0s H 0 0 60.0000000 2.00000 96.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 560 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 3342 5.00000 2.66667 46.7% - 3s H 0 0 4.0000000 2.66667 33.3% - 4s 0 0 2.66667 0 215 4.00000 2.66667 33.3% - 8s 0 0 2.67403 0 3045 4.00000 2.67403 33.1% - 11s 0 0 2.67403 0 3059 4.00000 2.67403 33.1% - 12s 0 0 2.67403 0 3038 4.00000 2.67403 33.1% - 15s 0 0 2.67403 0 3082 4.00000 2.67403 33.1% - 17s 0 0 2.67403 0 3063 4.00000 2.67403 33.1% - 19s 0 0 2.67403 0 3077 4.00000 2.67403 33.1% - 21s 0 0 2.67403 0 2960 4.00000 2.67403 33.1% - 24s 0 0 2.67403 0 3143 4.00000 2.67403 33.1% - 27s 0 0 2.67403 0 3178 4.00000 2.67403 33.1% - 29s 0 0 2.67403 0 3178 4.00000 2.67403 33.1% - 30s 0 1 3.00000 0 3178 4.00000 3.00000 25.0% - 38s Cutting planes: Clique: 119 Zero half: 6 Explored 6 nodes (91133 simplex iterations) in 39.61 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%