Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:00:03 2012 Optimize a model with 22343 rows, 5852 columns and 72502 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.76s Presolved: 22417 rows, 5850 columns, 77690 nonzeros Variable types: 0 continuous, 5850 integer (5850 binary) Found heuristic solution: objective 76.0000000 Root relaxation: objective 2.000000e+00, 4360 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 152 76.00000 2.00000 97.4% - 1s H 0 0 75.0000000 2.00000 97.3% - 1s H 0 0 6.0000000 2.00000 66.7% - 2s 0 0 2.66667 0 506 6.00000 2.66667 55.6% - 16s H 0 0 4.0000000 2.66667 33.3% - 19s 0 0 2.68203 0 5525 4.00000 2.68203 32.9% - 21s 0 0 2.68203 0 5538 4.00000 2.68203 32.9% - 25s 0 0 2.68203 0 5152 4.00000 2.68203 32.9% - 29s 0 0 2.68203 0 5037 4.00000 2.68203 32.9% - 31s 0 0 2.68203 0 5001 4.00000 2.68203 32.9% - 33s 0 0 2.68203 0 5021 4.00000 2.68203 32.9% - 35s 0 0 2.68203 0 5009 4.00000 2.68203 32.9% - 36s 0 0 2.68203 0 5082 4.00000 2.68203 32.9% - 38s 0 0 2.68203 0 4995 4.00000 2.68203 32.9% - 40s 0 0 2.68203 0 5075 4.00000 2.68203 32.9% - 42s 0 0 2.68203 0 5075 4.00000 2.68203 32.9% - 43s 0 1 3.00000 0 5075 4.00000 3.00000 25.0% - 68s Cutting planes: Clique: 357 Zero half: 3 Explored 4 nodes (77742 simplex iterations) in 68.50 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%