Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:58:29 2012 Optimize a model with 8903 rows, 2862 columns and 29307 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.18s Presolved: 8901 rows, 2860 columns, 28971 nonzeros Variable types: 0 continuous, 2860 integer (2860 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 2.000000e+00, 2126 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 0 106 53.00000 2.00000 96.2% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 141 5.00000 2.66667 46.7% - 1s 0 0 2.67105 0 2557 5.00000 2.67105 46.6% - 1s 0 0 2.67105 0 2536 5.00000 2.67105 46.6% - 2s 0 0 2.67105 0 2510 5.00000 2.67105 46.6% - 2s 0 0 2.67105 0 2519 5.00000 2.67105 46.6% - 3s 0 0 2.67105 0 2336 5.00000 2.67105 46.6% - 4s 0 0 2.67105 0 2279 5.00000 2.67105 46.6% - 4s 0 0 2.67105 0 2290 5.00000 2.67105 46.6% - 5s 0 0 2.67105 0 2287 5.00000 2.67105 46.6% - 5s 0 0 2.67105 0 2234 5.00000 2.67105 46.6% - 6s 0 0 2.67105 0 2242 5.00000 2.67105 46.6% - 7s 0 0 2.67105 0 2230 5.00000 2.67105 46.6% - 8s 0 0 2.67105 0 2232 5.00000 2.67105 46.6% - 8s 0 0 2.67105 0 2230 5.00000 2.67105 46.6% - 9s 0 0 2.67105 0 2241 5.00000 2.67105 46.6% - 9s 0 0 2.67105 0 2241 5.00000 2.67105 46.6% - 10s 0 2 2.80000 0 2241 5.00000 2.80000 44.0% - 12s H 27 2 4.0000000 4.00000 0.0% 358 14s Cutting planes: Clique: 72 Zero half: 8 Explored 27 nodes (36504 simplex iterations) in 14.42 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%