Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:36:54 2012 Optimize a model with 16659 rows, 4970 columns and 54598 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.56s Presolved: 16727 rows, 4968 columns, 59022 nonzeros Variable types: 0 continuous, 4968 integer (4968 binary) Found heuristic solution: objective 70.0000000 Root relaxation: objective 2.000000e+00, 3568 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 140 70.00000 2.00000 97.1% - 1s H 0 0 59.0000000 2.00000 96.6% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 956 5.00000 3.00000 40.0% - 8s 0 0 3.00000 0 1915 5.00000 3.00000 40.0% - 10s H 0 0 4.0000000 3.00000 25.0% - 11s 0 0 3.00000 0 1910 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 1923 4.00000 3.00000 25.0% - 23s Cutting planes: Clique: 28 Zero half: 9 Mod-K: 1 Explored 0 nodes (74446 simplex iterations) in 27.70 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%