Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:50:38 2012 Optimize a model with 6117 rows, 2162 columns and 20284 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 6161 rows, 2160 columns, 22273 nonzeros Variable types: 0 continuous, 2160 integer (2160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 2.666667e+00, 3701 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.66667 0 130 46.00000 2.66667 94.2% - 2s H 0 0 37.0000000 2.66667 92.8% - 2s H 0 0 5.0000000 2.66667 46.7% - 2s 0 0 3.00000 0 1352 5.00000 3.00000 40.0% - 2s 0 0 3.00000 0 1351 5.00000 3.00000 40.0% - 3s 0 0 3.00000 0 1356 5.00000 3.00000 40.0% - 4s H 0 0 4.0000000 3.00000 25.0% - 4s 0 0 3.00000 0 113 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 100 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 167 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 82 4.00000 3.00000 25.0% - 15s 0 0 3.00000 0 509 4.00000 3.00000 25.0% - 17s 0 0 3.00000 0 1267 4.00000 3.00000 25.0% - 20s 0 0 3.00000 0 114 4.00000 3.00000 25.0% - 23s 0 2 3.00000 0 86 4.00000 3.00000 25.0% - 26s 4 4 3.00000 1 985 4.00000 3.00000 25.0% 865 32s Cutting planes: Gomory: 14 Clique: 4 Zero half: 54 Explored 4 nodes (127781 simplex iterations) in 32.93 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%