Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:05:21 2012 Optimize a model with 16548 rows, 4556 columns and 53866 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.52s Presolved: 16546 rows, 4554 columns, 53372 nonzeros Variable types: 0 continuous, 4554 integer (4554 binary) Found heuristic solution: objective 67.0000000 Root relaxation: objective 2.000000e+00, 3372 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 134 67.00000 2.00000 97.0% - 0s H 0 0 66.0000000 2.00000 97.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 3.00000 0 2167 5.00000 3.00000 40.0% - 13s H 0 0 4.0000000 3.00000 25.0% - 14s 0 0 3.00000 0 2151 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 3054 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 141 4.00000 3.00000 25.0% - 24s Cutting planes: Clique: 13 Explored 0 nodes (74456 simplex iterations) in 25.59 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%