Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:58:43 2012 Optimize a model with 8426 rows, 2862 columns and 27876 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.16s Presolved: 8477 rows, 2860 columns, 30367 nonzeros Variable types: 0 continuous, 2860 integer (2860 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 2.000000e+00, 2122 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 106 52.00000 2.00000 96.2% - 0s H 0 0 48.0000000 2.00000 95.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 2341 5.00000 2.66667 46.7% - 1s 0 0 2.67105 0 2574 5.00000 2.67105 46.6% - 1s 0 0 2.67105 0 2582 5.00000 2.67105 46.6% - 2s 0 0 2.67105 0 2430 5.00000 2.67105 46.6% - 3s 0 0 2.67105 0 2406 5.00000 2.67105 46.6% - 3s 0 0 2.67105 0 2386 5.00000 2.67105 46.6% - 4s 0 0 2.67105 0 2397 5.00000 2.67105 46.6% - 5s 0 0 2.67105 0 2383 5.00000 2.67105 46.6% - 6s 0 0 2.67105 0 2408 5.00000 2.67105 46.6% - 6s 0 0 2.67105 0 2398 5.00000 2.67105 46.6% - 7s 0 0 2.67105 0 2404 5.00000 2.67105 46.6% - 8s 0 0 2.67105 0 2408 5.00000 2.67105 46.6% - 8s 0 0 2.67105 0 2408 5.00000 2.67105 46.6% - 9s 0 2 2.80000 0 2408 5.00000 2.80000 44.0% - 11s H 27 4 4.0000000 3.00000 25.0% 194 12s Cutting planes: Clique: 79 Zero half: 10 Explored 34 nodes (35563 simplex iterations) in 13.13 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%