Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:42:36 2012 Optimize a model with 5290 rows, 2162 columns and 17848 nonzeros Presolve removed 1104 rows and 0 columns Presolve time: 0.11s Presolved: 4186 rows, 2162 columns, 15180 nonzeros Variable types: 0 continuous, 2162 integer (2162 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.000000e+00, 3586 iterations, 0.29 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 92 26.00000 3.00000 88.5% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 191 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 74 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 62 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 64 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 142 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 127 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 121 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 69 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 123 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 121 4.00000 3.00000 25.0% - 13s 0 2 3.00000 0 120 4.00000 3.00000 25.0% - 14s 2 3 3.00000 1 121 4.00000 3.00000 25.0% 1010 15s 6 6 3.00000 1 143 4.00000 3.00000 25.0% 337 21s 12 10 3.00000 11 109 4.00000 3.00000 25.0% 3980 25s Cutting planes: Gomory: 2 Zero half: 5 Explored 20 nodes (142431 simplex iterations) in 26.96 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%