Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:53:33 2012 Optimize a model with 10135 rows, 3192 columns and 33318 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.24s Presolved: 10133 rows, 3190 columns, 32956 nonzeros Variable types: 0 continuous, 3190 integer (3190 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 2.000000e+00, 2302 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 112 56.00000 2.00000 96.4% - 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 0 153 5.00000 2.66667 46.7% - 1s 0 0 2.67081 0 2836 5.00000 2.67081 46.6% - 1s 0 0 2.67081 0 2829 5.00000 2.67081 46.6% - 2s 0 0 2.67081 0 2832 5.00000 2.67081 46.6% - 3s 0 0 2.67081 0 2534 5.00000 2.67081 46.6% - 4s 0 0 2.67081 0 2505 5.00000 2.67081 46.6% - 5s 0 0 2.67081 0 2576 5.00000 2.67081 46.6% - 6s 0 0 2.67081 0 2604 5.00000 2.67081 46.6% - 7s 0 0 2.67081 0 2476 5.00000 2.67081 46.6% - 9s 0 0 2.67081 0 2477 5.00000 2.67081 46.6% - 10s 0 0 2.67081 0 2466 5.00000 2.67081 46.6% - 11s 0 0 2.67081 0 2487 5.00000 2.67081 46.6% - 12s 0 0 2.67081 0 2487 5.00000 2.67081 46.6% - 13s 0 2 2.80000 0 2487 5.00000 2.80000 44.0% - 17s * 21 5 11 4.0000000 3.00000 25.0% 336 18s Cutting planes: Clique: 68 Zero half: 6 Explored 26 nodes (48156 simplex iterations) in 19.64 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%