Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:44:22 2012 Optimize a model with 8736 rows, 3192 columns and 29176 nonzeros Presolve removed 1 rows and 56 columns Presolve time: 0.07s Presolved: 8735 rows, 3136 columns, 29466 nonzeros Variable types: 0 continuous, 3136 integer (3136 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 2.000000e+00, 3485 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 110 33.00000 2.00000 93.9% - 0s H 0 0 9.0000000 2.00000 77.8% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 110 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 110 5.00000 2.00000 60.0% - 4s H 0 0 4.0000000 2.00000 50.0% - 4s 0 0 2.00000 0 110 4.00000 2.00000 50.0% - 7s 0 0 2.00000 0 110 4.00000 2.00000 50.0% - 10s 0 0 2.00000 0 110 4.00000 2.00000 50.0% - 13s 0 0 2.00000 0 110 4.00000 2.00000 50.0% - 15s 0 2 2.00000 0 110 4.00000 2.00000 50.0% - 21s 1 3 3.00000 1 522 4.00000 2.00000 50.0% 19394 25s 17 5 3.00000 2 422 4.00000 3.00000 25.0% 2562 30s 41 7 3.00000 5 133 4.00000 3.00000 25.0% 1618 35s Cutting planes: Clique: 134 Explored 89 nodes (146612 simplex iterations) in 39.37 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%