Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:01:20 2012 Optimize a model with 14605 rows, 4556 columns and 48037 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.45s Presolved: 14603 rows, 4554 columns, 47601 nonzeros Variable types: 0 continuous, 4554 integer (4554 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3499 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 134 66.00000 2.00000 97.0% - 0s H 0 0 65.0000000 2.00000 96.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 650 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 3s 0 0 2.66667 0 3824 4.00000 2.66667 33.3% - 4s 0 0 2.66667 0 166 4.00000 2.66667 33.3% - 9s 0 0 2.67010 0 3436 4.00000 2.67010 33.2% - 13s 0 0 2.67010 0 3645 4.00000 2.67010 33.2% - 14s 0 0 2.67010 0 3342 4.00000 2.67010 33.2% - 16s 0 0 2.67010 0 3348 4.00000 2.67010 33.2% - 18s 0 0 2.67010 0 3330 4.00000 2.67010 33.2% - 20s 0 0 2.67010 0 3344 4.00000 2.67010 33.2% - 22s 0 0 2.67010 0 3416 4.00000 2.67010 33.2% - 24s 0 0 2.67010 0 3304 4.00000 2.67010 33.2% - 26s 0 0 2.67010 0 3398 4.00000 2.67010 33.2% - 28s 0 0 2.67010 0 3398 4.00000 2.67010 33.2% - 29s 0 2 2.80000 0 3398 4.00000 2.80000 30.0% - 35s 6 0 cutoff 1 4.00000 4.00000 0.0% 3454 40s Cutting planes: Clique: 88 Zero half: 15 Explored 7 nodes (94797 simplex iterations) in 40.51 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%