Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:14:03 2012 Optimize a model with 11780 rows, 4032 columns and 39058 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.32s Presolved: 11841 rows, 4030 columns, 42653 nonzeros Variable types: 0 continuous, 4030 integer (4030 binary) Found heuristic solution: objective 63.0000000 Root relaxation: objective 2.000000e+00, 2971 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 63.00000 2.00000 96.8% - 0s H 0 0 59.0000000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 864 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 3512 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 151 5.00000 2.66667 46.7% - 11s 0 0 2.67033 0 3089 5.00000 2.67033 46.6% - 16s 0 0 2.67033 0 3107 5.00000 2.67033 46.6% - 17s 0 0 2.67033 0 3112 5.00000 2.67033 46.6% - 20s 0 0 2.67033 0 3104 5.00000 2.67033 46.6% - 24s 0 0 2.67033 0 3103 5.00000 2.67033 46.6% - 27s 0 0 2.67033 0 3105 5.00000 2.67033 46.6% - 31s 0 0 2.67033 0 3105 5.00000 2.67033 46.6% - 35s H 0 0 4.0000000 2.67033 33.2% - 43s 0 2 2.80000 0 3105 4.00000 2.80000 30.0% - 49s 5 5 3.00000 4 124 4.00000 3.00000 25.0% 1961 50s Cutting planes: Clique: 74 Zero half: 4 Explored 11 nodes (114395 simplex iterations) in 53.33 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%