Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:11:30 2012 Optimize a model with 4000 rows, 650 columns and 12550 nonzeros Presolve time: 0.05s Presolved: 4000 rows, 650 columns, 21053 nonzeros Variable types: 0 continuous, 650 integer (650 binary) Root relaxation: objective 2.000000e+00, 89 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 50 - 2.00000 - - 0s H 0 0 8.0000000 2.00000 75.0% - 0s 0 0 3.50000 0 93 8.00000 3.50000 56.3% - 0s 0 0 6.00000 0 137 8.00000 6.00000 25.0% - 0s H 0 0 7.0000000 6.00000 14.3% - 0s 0 0 6.00000 0 151 7.00000 6.00000 14.3% - 0s 0 0 6.00000 0 46 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 22 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 24 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 16 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 18 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 55 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 43 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 31 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 26 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 16 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 26 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 26 7.00000 6.00000 14.3% - 3s 0 2 6.00000 0 16 7.00000 6.00000 14.3% - 4s 4 4 6.00000 1 16 7.00000 6.00000 14.3% 180 5s 238 18 6.00000 21 36 7.00000 6.00000 14.3% 149 10s 554 27 6.00000 21 77 7.00000 6.00000 14.3% 135 15s 871 14 6.00000 25 50 7.00000 6.00000 14.3% 124 20s Cutting planes: Gomory: 10 Clique: 17 Zero half: 15 Explored 955 nodes (143797 simplex iterations) in 21.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%