Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:00:27 2012 Optimize a model with 6239 rows, 2352 columns and 20830 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 6237 rows, 2350 columns, 20570 nonzeros Variable types: 0 continuous, 2350 integer (2350 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 2.000000e+00, 1729 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 96 48.00000 2.00000 95.8% - 0s H 0 0 45.0000000 2.00000 95.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 792 5.00000 2.66667 46.7% - 0s 0 0 2.67153 0 2067 5.00000 2.67153 46.6% - 1s H 0 0 4.0000000 2.67153 33.2% - 1s 0 0 2.67153 0 2077 4.00000 2.67153 33.2% - 1s 0 0 2.67153 0 1795 4.00000 2.67153 33.2% - 4s 0 0 2.67153 0 1845 4.00000 2.67153 33.2% - 6s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 127 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 91 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 123 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 92 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 111 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 115 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 114 4.00000 3.00000 25.0% - 7s 0 2 3.00000 0 88 4.00000 3.00000 25.0% - 7s Cutting planes: Gomory: 25 Zero half: 127 Explored 7 nodes (31576 simplex iterations) in 7.64 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%