Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:07:43 2012 Optimize a model with 8777 rows, 3306 columns and 29353 nonzeros Presolve removed 3 rows and 59 columns Presolve time: 0.20s Presolved: 8774 rows, 3247 columns, 28988 nonzeros Variable types: 0 continuous, 3247 integer (3247 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 2.000000e+00, 2351 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 0 112 57.00000 2.00000 96.5% - 0s H 0 0 52.0000000 2.00000 96.2% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 158 5.00000 2.66667 46.7% - 1s 0 0 2.67073 0 2831 5.00000 2.67073 46.6% - 1s 0 0 2.67073 0 2844 5.00000 2.67073 46.6% - 2s 0 0 2.67073 0 2561 5.00000 2.67073 46.6% - 4s 0 0 2.67073 0 2525 5.00000 2.67073 46.6% - 5s 0 0 2.67073 0 2500 5.00000 2.67073 46.6% - 5s 0 0 2.67073 0 2511 5.00000 2.67073 46.6% - 6s 0 0 2.67073 0 2490 5.00000 2.67073 46.6% - 7s 0 0 2.67073 0 2517 5.00000 2.67073 46.6% - 8s 0 0 2.67073 0 2461 5.00000 2.67073 46.6% - 9s 0 0 2.67073 0 2461 5.00000 2.67073 46.6% - 10s 0 0 2.67073 0 2447 5.00000 2.67073 46.6% - 11s 0 0 2.67073 0 2449 5.00000 2.67073 46.6% - 12s 0 0 2.67073 0 2449 5.00000 2.67073 46.6% - 12s 0 2 2.80000 0 2449 5.00000 2.80000 44.0% - 16s * 25 2 12 4.0000000 4.00000 0.0% 406 18s Cutting planes: Clique: 77 Zero half: 10 Explored 26 nodes (51781 simplex iterations) in 18.34 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%