Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:10:54 2012 Optimize a model with 15386 rows, 4830 columns and 50644 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.50s Presolved: 15453 rows, 4828 columns, 54959 nonzeros Variable types: 0 continuous, 4828 integer (4828 binary) Found heuristic solution: objective 69.0000000 Root relaxation: objective 2.000000e+00, 3673 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 0 138 69.00000 2.00000 97.1% - 0s H 0 0 65.0000000 2.00000 96.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 2110 5.00000 3.00000 40.0% - 8s 0 0 3.00752 0 3201 5.00000 3.00752 39.8% - 11s H 0 0 4.0000000 3.00752 24.8% - 12s Cutting planes: Clique: 38 Zero half: 4 Explored 0 nodes (37671 simplex iterations) in 12.19 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%