Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:38:33 2012 Optimize a model with 14279 rows, 4692 columns and 47190 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.45s Presolved: 14345 rows, 4690 columns, 51394 nonzeros Variable types: 0 continuous, 4690 integer (4690 binary) Found heuristic solution: objective 68.0000000 Root relaxation: objective 2.000000e+00, 3250 iterations, 0.11 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 60.0000000 2.00000 96.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 193 5.00000 2.66667 46.7% - 2s 0 0 2.67005 0 4037 5.00000 2.67005 46.6% - 3s 0 0 2.67005 0 4044 5.00000 2.67005 46.6% - 5s 0 0 2.67005 0 3549 5.00000 2.67005 46.6% - 8s 0 0 2.67005 0 3566 5.00000 2.67005 46.6% - 10s 0 0 2.67005 0 3466 5.00000 2.67005 46.6% - 12s 0 0 2.67005 0 3463 5.00000 2.67005 46.6% - 15s 0 0 2.67005 0 3541 5.00000 2.67005 46.6% - 17s 0 0 2.67005 0 3353 5.00000 2.67005 46.6% - 19s 0 0 2.67005 0 3420 5.00000 2.67005 46.6% - 22s H 0 0 4.0000000 2.67005 33.2% - 22s 0 0 2.67005 0 3540 4.00000 2.67005 33.2% - 25s 0 0 2.67005 0 3540 4.00000 2.67005 33.2% - 26s 0 2 2.80000 0 3540 4.00000 2.80000 30.0% - 35s Cutting planes: Clique: 69 Zero half: 16 Explored 7 nodes (82330 simplex iterations) in 38.24 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%