Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:47:04 2012 Optimize a model with 22343 rows, 5852 columns and 72502 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.79s Presolved: 22341 rows, 5850 columns, 71914 nonzeros Variable types: 0 continuous, 5850 integer (5850 binary) Found heuristic solution: objective 76.0000000 Root relaxation: objective 2.000000e+00, 4210 iterations, 0.20 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 66.0000000 2.00000 97.0% - 1s H 0 0 6.0000000 2.00000 66.7% - 2s 0 0 2.66667 0 712 6.00000 2.66667 55.6% - 14s 0 0 2.66667 0 3823 6.00000 2.66667 55.6% - 14s 0 0 2.66968 0 5032 6.00000 2.66968 55.5% - 18s 0 0 2.66968 0 5034 6.00000 2.66968 55.5% - 19s 0 0 2.66968 0 5026 6.00000 2.66968 55.5% - 21s 0 0 2.66968 0 5107 6.00000 2.66968 55.5% - 22s 0 0 2.66968 0 5172 6.00000 2.66968 55.5% - 23s 0 0 2.66968 0 5175 6.00000 2.66968 55.5% - 25s 0 0 2.66968 0 5178 6.00000 2.66968 55.5% - 26s 0 0 2.66968 0 5028 6.00000 2.66968 55.5% - 27s 0 2 2.80000 0 5028 6.00000 2.80000 53.3% - 55s H 28 14 5.0000000 3.00000 40.0% 303 59s 55 19 4.00000 22 116 5.00000 4.00000 20.0% 304 60s * 93 1 12 4.0000000 4.00000 0.0% 218 63s Cutting planes: Clique: 179 Zero half: 24 Explored 94 nodes (72556 simplex iterations) in 63.03 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%