Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:08:48 2012 Optimize a model with 2143 rows, 1056 columns and 7326 nonzeros Presolve removed 355 rows and 34 columns Presolve time: 0.10s Presolved: 1788 rows, 1022 columns, 6382 nonzeros Variable types: 0 continuous, 1022 integer (1022 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 4.000000e+00, 1392 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4.00000 0 72 32.00000 4.00000 87.5% - 0s H 0 0 20.0000000 4.00000 80.0% - 0s H 0 0 11.0000000 4.00000 63.6% - 0s 0 0 4.00000 0 160 11.00000 4.00000 63.6% - 0s H 0 0 7.0000000 4.00000 42.9% - 0s 0 0 4.00000 0 27 7.00000 4.00000 42.9% - 0s H 0 0 5.0000000 4.00000 20.0% - 0s H 0 0 4.0000000 4.00000 0.0% - 0s Explored 0 nodes (5281 simplex iterations) in 0.34 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%