Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:01:45 2012 Optimize a model with 47474 rows, 44732 columns and 186100 nonzeros Presolve removed 30 rows and 5910 columns Presolve time: 1.03s Presolved: 47444 rows, 38822 columns, 179742 nonzeros Variable types: 0 continuous, 38822 integer (38822 binary) Found heuristic solution: objective 211.0000000 Root relaxation: objective 2.000000e+00, 28527 iterations, 2.49 seconds Total elapsed time = 6.81s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 352 211.00000 2.00000 99.1% - 7s H 0 0 138.0000000 2.00000 98.6% - 7s H 0 0 4.0000000 2.00000 50.0% - 8s 0 0 2.66667 0 5563 4.00000 2.66667 33.3% - 21s 0 0 2.66667 0 13030 4.00000 2.66667 33.3% - 36s H 0 0 3.0000000 2.66667 11.1% - 55s Cutting planes: Clique: 2 Zero half: 27 Explored 0 nodes (120542 simplex iterations) in 55.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%