Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:14:02 2012 Optimize a model with 19709 rows, 5402 columns and 64165 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.70s Presolved: 19707 rows, 5400 columns, 63625 nonzeros Variable types: 0 continuous, 5400 integer (5400 binary) Found heuristic solution: objective 73.0000000 Root relaxation: objective 2.000000e+00, 4005 iterations, 0.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 146 73.00000 2.00000 97.3% - 1s H 0 0 65.0000000 2.00000 96.9% - 1s H 0 0 6.0000000 2.00000 66.7% - 3s 0 0 2.66667 0 3551 6.00000 2.66667 55.6% - 11s 0 0 2.66667 0 3550 6.00000 2.66667 55.6% - 12s 0 0 2.66667 0 480 6.00000 2.66667 55.6% - 13s 0 0 2.68269 0 4884 6.00000 2.68269 55.3% - 14s 0 0 2.68269 0 4819 6.00000 2.68269 55.3% - 16s 0 0 2.68269 0 4818 6.00000 2.68269 55.3% - 17s 0 0 2.68269 0 4800 6.00000 2.68269 55.3% - 18s 0 0 2.68269 0 4808 6.00000 2.68269 55.3% - 18s 0 0 2.68269 0 4397 6.00000 2.68269 55.3% - 21s 0 0 2.68269 0 4227 6.00000 2.68269 55.3% - 24s 0 0 2.68269 0 4232 6.00000 2.68269 55.3% - 26s 0 0 2.68269 0 4125 6.00000 2.68269 55.3% - 30s 0 0 2.68269 0 4124 6.00000 2.68269 55.3% - 32s 0 0 2.68269 0 4178 6.00000 2.68269 55.3% - 35s 0 0 2.68269 0 4220 6.00000 2.68269 55.3% - 37s 0 0 2.68269 0 4210 6.00000 2.68269 55.3% - 38s 0 2 3.00000 0 4210 6.00000 3.00000 50.0% - 60s * 25 2 21 4.0000000 3.00000 25.0% 608 63s Cutting planes: Clique: 251 Zero half: 3 Explored 28 nodes (96505 simplex iterations) in 63.34 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%