Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:01:39 2012 Optimize a model with 13389 rows, 4290 columns and 44133 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.40s Presolved: 13387 rows, 4288 columns, 43721 nonzeros Variable types: 0 continuous, 4288 integer (4288 binary) Found heuristic solution: objective 65.0000000 Root relaxation: objective 2.000000e+00, 3043 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 0 130 65.00000 2.00000 96.9% - 0s H 0 0 64.0000000 2.00000 96.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 512 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 2169 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 287 5.00000 2.66667 46.7% - 6s 0 0 2.67742 0 2937 5.00000 2.67742 46.5% - 10s 0 0 2.67742 0 3106 5.00000 2.67742 46.5% - 12s 0 0 2.67742 0 3100 5.00000 2.67742 46.5% - 15s 0 0 2.67742 0 3110 5.00000 2.67742 46.5% - 17s 0 0 2.67742 0 3037 5.00000 2.67742 46.5% - 21s 0 0 2.67742 0 3064 5.00000 2.67742 46.5% - 24s 0 0 2.67742 0 3060 5.00000 2.67742 46.5% - 26s 0 0 2.67742 0 3050 5.00000 2.67742 46.5% - 28s 0 0 2.67742 0 3172 5.00000 2.67742 46.5% - 30s 0 0 2.67742 0 3218 5.00000 2.67742 46.5% - 32s 0 0 2.67742 0 3218 5.00000 2.67742 46.5% - 34s 0 2 3.00000 0 3218 5.00000 3.00000 40.0% - 49s 1 3 3.00000 1 253 5.00000 3.00000 40.0% 5375 50s * 17 4 14 4.0000000 4.00000 0.0% 782 51s Cutting planes: Clique: 151 Zero half: 8 Explored 18 nodes (103648 simplex iterations) in 51.62 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%