Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:12:37 2012 Optimize a model with 9974 rows, 3306 columns and 32944 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.23s Presolved: 10029 rows, 3304 columns, 35843 nonzeros Variable types: 0 continuous, 3304 integer (3304 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 2.000000e+00, 2321 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 0 114 57.00000 2.00000 96.5% - 0s H 0 0 44.0000000 2.00000 95.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 152 5.00000 2.66667 46.7% - 1s 0 0 2.67073 0 2953 5.00000 2.67073 46.6% - 1s 0 0 2.67073 0 2973 5.00000 2.67073 46.6% - 2s 0 0 2.67073 0 2729 5.00000 2.67073 46.6% - 6s 0 0 2.67073 0 2584 5.00000 2.67073 46.6% - 11s 0 0 2.67073 0 2637 5.00000 2.67073 46.6% - 14s 0 0 2.67073 0 2557 5.00000 2.67073 46.6% - 17s 0 0 2.67073 0 2575 5.00000 2.67073 46.6% - 20s 0 0 2.67073 0 2574 5.00000 2.67073 46.6% - 23s 0 0 2.67073 0 2577 5.00000 2.67073 46.6% - 26s 0 0 2.67073 0 2423 5.00000 2.67073 46.6% - 30s 0 0 2.67073 0 2513 5.00000 2.67073 46.6% - 34s 0 0 2.67073 0 2513 5.00000 2.67073 46.6% - 35s 0 2 2.80000 0 2513 5.00000 2.80000 44.0% - 45s * 20 4 14 4.0000000 3.00000 25.0% 678 46s Cutting planes: Clique: 83 Zero half: 18 Explored 25 nodes (141183 simplex iterations) in 47.88 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%