Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:27:08 2012 Optimize a model with 7920 rows, 3080 columns and 26620 nonzeros Presolve removed 1045 rows and 0 columns Presolve time: 0.15s Presolved: 6875 rows, 3080 columns, 24145 nonzeros Variable types: 0 continuous, 3080 integer (3080 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 3.000000e+00, 5736 iterations, 0.62 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 107 35.00000 3.00000 91.4% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.00000 0 104 5.00000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 104 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 100 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 138 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 168 4.00000 3.00000 25.0% - 15s 0 0 3.00000 0 138 4.00000 3.00000 25.0% - 16s 0 2 3.00000 0 138 4.00000 3.00000 25.0% - 18s 2 3 3.00000 1 138 4.00000 3.00000 25.0% 1396 20s 5 5 3.00000 1 76 4.00000 3.00000 25.0% 558 25s 7 6 3.00000 1 123 4.00000 3.00000 25.0% 399 31s 8 7 3.00000 1 117 4.00000 3.00000 25.0% 349 35s 10 8 3.00000 1 172 4.00000 3.00000 25.0% 279 50s 14 11 3.00000 12 135 4.00000 3.00000 25.0% 10110 56s 17 11 3.00000 14 96 4.00000 3.00000 25.0% 8357 60s Cutting planes: Gomory: 2 Zero half: 23 Explored 34 nodes (252787 simplex iterations) in 63.54 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%