Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:39:28 2012 Optimize a model with 16991 rows, 5256 columns and 55870 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.62s Presolved: 16989 rows, 5254 columns, 55398 nonzeros Variable types: 0 continuous, 5254 integer (5254 binary) Found heuristic solution: objective 72.0000000 Root relaxation: objective 2.000000e+00, 3840 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 144 72.00000 2.00000 97.2% - 1s H 0 0 70.0000000 2.00000 97.1% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 1566 5.00000 2.66667 46.7% - 6s H 0 0 4.0000000 2.66667 33.3% - 9s 0 0 2.66667 0 1245 4.00000 2.66667 33.3% - 10s 0 0 2.67633 0 4431 4.00000 2.67633 33.1% - 13s 0 0 2.67633 0 4428 4.00000 2.67633 33.1% - 16s 0 0 2.67633 0 4432 4.00000 2.67633 33.1% - 17s 0 0 2.67633 0 3534 4.00000 2.67633 33.1% - 34s 0 0 2.67633 0 3851 4.00000 2.67633 33.1% - 48s 0 0 2.67633 0 3761 4.00000 2.67633 33.1% - 63s 0 0 2.67633 0 3926 4.00000 2.67633 33.1% - 73s 0 0 2.67633 0 4000 4.00000 2.67633 33.1% - 86s 0 0 2.67633 0 4000 4.00000 2.67633 33.1% - 97s 0 1 3.00000 0 4000 4.00000 3.00000 25.0% - 132s Cutting planes: Clique: 103 Zero half: 18 Explored 10 nodes (283607 simplex iterations) in 134.12 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%