Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:40:00 2012 Optimize a model with 14959 rows, 4692 columns and 49230 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.48s Presolved: 15025 rows, 4690 columns, 53414 nonzeros Variable types: 0 continuous, 4690 integer (4690 binary) Found heuristic solution: objective 68.0000000 Root relaxation: objective 2.000000e+00, 3488 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 68.00000 2.00000 97.1% - 0s H 0 0 62.0000000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 189 5.00000 2.66667 46.7% - 4s 0 0 2.67005 0 3794 5.00000 2.67005 46.6% - 5s 0 0 2.67005 0 3738 5.00000 2.67005 46.6% - 7s 0 0 2.67005 0 3755 5.00000 2.67005 46.6% - 7s 0 0 2.67005 0 3348 5.00000 2.67005 46.6% - 12s 0 0 2.67005 0 3462 5.00000 2.67005 46.6% - 17s 0 0 2.67005 0 3354 5.00000 2.67005 46.6% - 22s 0 0 2.67005 0 3101 5.00000 2.67005 46.6% - 28s 0 0 2.67005 0 3390 5.00000 2.67005 46.6% - 34s 0 0 2.67005 0 3316 5.00000 2.67005 46.6% - 41s 0 0 2.67005 0 3352 5.00000 2.67005 46.6% - 45s 0 0 2.67005 0 3440 5.00000 2.67005 46.6% - 52s 0 0 2.67005 0 3440 5.00000 2.67005 46.6% - 55s 0 2 2.80000 0 3376 5.00000 2.80000 44.0% - 72s * 28 4 22 4.0000000 3.00000 25.0% 642 74s 32 0 cutoff 1 4.00000 4.00000 0.0% 719 75s Cutting planes: Clique: 62 Zero half: 10 Explored 33 nodes (211152 simplex iterations) in 75.58 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%