Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:30:02 2012 Optimize a model with 16038 rows, 4422 columns and 52272 nonzeros Presolve time: 0.12s Presolved: 16038 rows, 4422 columns, 52451 nonzeros Variable types: 0 continuous, 4422 integer (4422 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 2.000000e+00, 5315 iterations, 0.43 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 132 41.00000 2.00000 95.1% - 2s H 0 0 17.0000000 2.00000 88.2% - 2s H 0 0 5.0000000 2.00000 60.0% - 2s 0 0 2.00000 0 132 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 132 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 132 5.00000 2.00000 60.0% - 16s 0 0 2.00000 0 132 5.00000 2.00000 60.0% - 24s 0 0 2.00000 0 132 5.00000 2.00000 60.0% - 31s 0 0 2.00000 0 132 5.00000 2.00000 60.0% - 38s 0 2 2.00000 0 132 5.00000 2.00000 60.0% - 65s 1 3 3.00000 1 128 5.00000 2.00000 60.0% 39102 75s 2 4 3.00000 1 886 5.00000 3.00000 40.0% 34067 85s 3 5 3.07692 2 365 5.00000 3.00000 40.0% 31608 93s 4 6 3.20000 2 474 5.00000 3.00000 40.0% 31275 103s * 27 5 22 4.0000000 3.00000 25.0% 4810 104s 31 3 3.00000 2 225 4.00000 3.00000 25.0% 4318 105s 52 0 cutoff 5 4.00000 4.00000 0.0% 3079 111s Cutting planes: Clique: 149 Zero half: 2 Explored 53 nodes (264028 simplex iterations) in 111.36 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%