Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:06:00 2012 Optimize a model with 14605 rows, 4556 columns and 48037 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.45s Presolved: 14670 rows, 4554 columns, 52090 nonzeros Variable types: 0 continuous, 4554 integer (4554 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3305 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 134 66.00000 2.00000 97.0% - 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 0 828 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 3693 5.00000 2.66667 46.7% - 3s H 0 0 4.0000000 2.66667 33.3% - 5s 0 0 2.67708 0 3587 4.00000 2.67708 33.1% - 9s 0 0 2.67708 0 3581 4.00000 2.67708 33.1% - 11s 0 0 2.67708 0 3565 4.00000 2.67708 33.1% - 12s 0 0 2.67708 0 3562 4.00000 2.67708 33.1% - 13s 0 0 2.67708 0 3550 4.00000 2.67708 33.1% - 13s 0 0 2.67708 0 3548 4.00000 2.67708 33.1% - 14s 0 0 2.67708 0 3540 4.00000 2.67708 33.1% - 15s 0 0 2.67708 0 3542 4.00000 2.67708 33.1% - 16s 0 0 2.67708 0 3411 4.00000 2.67708 33.1% - 18s 0 0 2.67708 0 3491 4.00000 2.67708 33.1% - 21s 0 0 2.67708 0 3275 4.00000 2.67708 33.1% - 23s 0 0 2.67708 0 3392 4.00000 2.67708 33.1% - 25s 0 0 2.67708 0 3406 4.00000 2.67708 33.1% - 28s 0 0 2.67708 0 3321 4.00000 2.67708 33.1% - 30s 0 0 2.67708 0 3372 4.00000 2.67708 33.1% - 32s 0 0 2.67708 0 3372 4.00000 2.67708 33.1% - 33s 0 1 3.00000 0 3372 4.00000 3.00000 25.0% - 42s Cutting planes: Clique: 142 Zero half: 7 Explored 6 nodes (71900 simplex iterations) in 43.69 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%