Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:01:25 2012 Optimize a model with 14765 rows, 4830 columns and 48781 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.48s Presolved: 14763 rows, 4828 columns, 48353 nonzeros Variable types: 0 continuous, 4828 integer (4828 binary) Found heuristic solution: objective 69.0000000 Root relaxation: objective 2.000000e+00, 3674 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 138 69.00000 2.00000 97.1% - 0s H 0 0 65.0000000 2.00000 96.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 1116 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 4042 5.00000 2.66667 46.7% - 3s 0 0 2.66667 0 172 5.00000 2.66667 46.7% - 9s 0 0 2.67000 0 3632 5.00000 2.67000 46.6% - 12s 0 0 2.67000 0 3665 5.00000 2.67000 46.6% - 13s 0 0 2.67000 0 3649 5.00000 2.67000 46.6% - 15s 0 0 2.67000 0 3526 5.00000 2.67000 46.6% - 18s 0 0 2.67000 0 3491 5.00000 2.67000 46.6% - 20s 0 0 2.67000 0 3466 5.00000 2.67000 46.6% - 23s 0 0 2.67000 0 3365 5.00000 2.67000 46.6% - 25s 0 0 2.67000 0 3428 5.00000 2.67000 46.6% - 27s 0 0 2.67000 0 3419 5.00000 2.67000 46.6% - 30s 0 0 2.67000 0 3425 5.00000 2.67000 46.6% - 32s 0 0 2.67000 0 3423 5.00000 2.67000 46.6% - 35s 0 0 2.67000 0 3420 5.00000 2.67000 46.6% - 37s 0 0 2.67000 0 3422 5.00000 2.67000 46.6% - 39s 0 0 2.67000 0 3421 5.00000 2.67000 46.6% - 42s 0 0 2.67000 0 3417 5.00000 2.67000 46.6% - 45s 0 0 2.67000 0 3444 5.00000 2.67000 46.6% - 47s 0 0 2.67000 0 3444 5.00000 2.67000 46.6% - 48s 0 2 2.80000 0 3444 5.00000 2.80000 44.0% - 73s 7 3 4.00000 2 124 5.00000 3.00000 40.0% 1241 75s * 19 6 11 4.0000000 3.00000 25.0% 586 75s Cutting planes: Clique: 73 Zero half: 4 Explored 26 nodes (129218 simplex iterations) in 77.73 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%