Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:27:23 2012 Optimize a model with 11019 rows, 3422 columns and 36190 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.27s Presolved: 11017 rows, 3420 columns, 35810 nonzeros Variable types: 0 continuous, 3420 integer (3420 binary) Found heuristic solution: objective 58.0000000 Root relaxation: objective 2.000000e+00, 2551 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 116 58.00000 2.00000 96.6% - 0s H 0 0 54.0000000 2.00000 96.3% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 229 5.00000 2.66667 46.7% - 1s 0 0 2.67470 0 3253 5.00000 2.67470 46.5% - 2s 0 0 2.67470 0 3247 5.00000 2.67470 46.5% - 3s 0 0 2.67470 0 3251 5.00000 2.67470 46.5% - 3s 0 0 2.67470 0 2928 5.00000 2.67470 46.5% - 8s 0 0 2.67470 0 2979 5.00000 2.67470 46.5% - 11s 0 0 2.67470 0 3038 5.00000 2.67470 46.5% - 15s 0 0 2.67470 0 3108 5.00000 2.67470 46.5% - 17s 0 0 2.67470 0 3024 5.00000 2.67470 46.5% - 22s 0 0 2.67470 0 2914 5.00000 2.67470 46.5% - 25s 0 0 2.67470 0 2987 5.00000 2.67470 46.5% - 28s 0 0 2.67470 0 2987 5.00000 2.67470 46.5% - 29s 0 2 3.00000 0 2987 5.00000 3.00000 40.0% - 35s * 18 6 14 4.0000000 3.00000 25.0% 784 37s Cutting planes: Clique: 104 Zero half: 5 Explored 41 nodes (100832 simplex iterations) in 38.20 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%