Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:09:44 2012 Optimize a model with 14429 rows, 4290 columns and 47253 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.42s Presolved: 14492 rows, 4288 columns, 51034 nonzeros Variable types: 0 continuous, 4288 integer (4288 binary) Found heuristic solution: objective 65.0000000 Root relaxation: objective 2.000000e+00, 3064 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 0 130 65.00000 2.00000 96.9% - 0s H 0 0 62.0000000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 294 5.00000 2.66667 46.7% - 2s 0 0 2.67742 0 3769 5.00000 2.67742 46.5% - 3s 0 0 2.67742 0 3777 5.00000 2.67742 46.5% - 5s 0 0 2.67742 0 3363 5.00000 2.67742 46.5% - 10s 0 0 2.67742 0 3437 5.00000 2.67742 46.5% - 13s 0 0 2.67742 0 3357 5.00000 2.67742 46.5% - 17s 0 0 2.67742 0 3289 5.00000 2.67742 46.5% - 21s 0 0 2.67742 0 3361 5.00000 2.67742 46.5% - 26s 0 0 2.67742 0 3379 5.00000 2.67742 46.5% - 29s 0 0 2.67742 0 3422 5.00000 2.67742 46.5% - 33s 0 0 2.67742 0 3422 5.00000 2.67742 46.5% - 36s 0 2 3.00000 0 3422 5.00000 3.00000 40.0% - 49s 2 4 3.00000 2 216 5.00000 3.00000 40.0% 3626 50s * 29 3 22 4.0000000 4.00000 0.0% 566 53s Cutting planes: Clique: 141 Zero half: 9 Explored 30 nodes (103774 simplex iterations) in 53.04 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%