Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:50:16 2012 Optimize a model with 6900 rows, 930 columns and 21510 nonzeros Presolve time: 0.06s Presolved: 6900 rows, 930 columns, 29372 nonzeros Variable types: 0 continuous, 930 integer (930 binary) Found heuristic solution: objective 19.0000000 Root relaxation: objective 2.000000e+00, 118 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 60 19.00000 2.00000 89.5% - 0s H 0 0 13.0000000 2.00000 84.6% - 0s H 0 0 8.0000000 2.00000 75.0% - 0s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 1s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 1s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 1s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 2s 0 2 2.00000 0 60 8.00000 2.00000 75.0% - 3s 32 22 6.00000 3 171 8.00000 3.00000 62.5% 381 5s * 124 26 14 7.0000000 3.50000 50.0% 282 8s 174 38 4.50000 5 109 7.00000 4.00000 42.9% 263 10s 358 50 5.00000 14 56 7.00000 5.00000 28.6% 233 15s 626 88 infeasible 12 7.00000 5.31250 24.1% 198 20s 884 87 6.00000 5 148 7.00000 6.00000 14.3% 169 25s 1301 38 6.00000 16 59 7.00000 6.00000 14.3% 150 30s Cutting planes: Clique: 388 Zero half: 30 Explored 1750 nodes (230402 simplex iterations) in 31.85 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%