Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:13:33 2012 Optimize a model with 13229 rows, 4032 columns and 43405 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.36s Presolved: 13290 rows, 4030 columns, 46954 nonzeros Variable types: 0 continuous, 4030 integer (4030 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 2.000000e+00, 2900 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 62.00000 2.00000 96.8% - 0s H 0 0 6.0000000 2.00000 66.7% - 1s 0 0 2.66667 0 281 6.00000 2.66667 55.6% - 2s H 0 0 5.0000000 2.66667 46.7% - 2s 0 0 2.67778 0 3473 5.00000 2.67778 46.4% - 2s 0 0 2.67778 0 3467 5.00000 2.67778 46.4% - 4s 0 0 2.67778 0 3413 5.00000 2.67778 46.4% - 4s 0 0 2.67778 0 3450 5.00000 2.67778 46.4% - 5s 0 0 2.67778 0 2905 5.00000 2.67778 46.4% - 8s 0 0 2.67778 0 2914 5.00000 2.67778 46.4% - 9s 0 0 2.67778 0 2988 5.00000 2.67778 46.4% - 11s 0 0 2.67778 0 3012 5.00000 2.67778 46.4% - 13s 0 0 2.67778 0 2945 5.00000 2.67778 46.4% - 15s 0 0 2.67778 0 3059 5.00000 2.67778 46.4% - 17s 0 0 2.67778 0 3059 5.00000 2.67778 46.4% - 18s 0 2 3.00000 0 3059 5.00000 3.00000 40.0% - 27s * 21 2 16 4.0000000 3.00000 25.0% 462 29s Cutting planes: Clique: 186 Zero half: 26 Explored 26 nodes (60199 simplex iterations) in 29.51 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%