Gurobi 5.0.1 (linux64) logging started Sat Nov 17 02:40:26 2012 Optimize a model with 54559 rows, 48620 columns and 211198 nonzeros Presolve removed 28 rows and 5722 columns Presolve time: 1.21s Presolved: 54531 rows, 42898 columns, 204982 nonzeros Variable types: 0 continuous, 42898 integer (42898 binary) Found heuristic solution: objective 220.0000000 Root relaxation: objective 2.000000e+00, 31998 iterations, 2.92 seconds Total elapsed time = 7.66s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 370 220.00000 2.00000 99.1% - 8s H 0 0 194.0000000 2.00000 99.0% - 8s H 0 0 4.0000000 2.00000 50.0% - 9s 0 0 2.66667 0 6696 4.00000 2.66667 33.3% - 33s H 0 0 3.0000000 2.66667 11.1% - 42s Cutting planes: Clique: 2 Zero half: 3 Explored 0 nodes (137884 simplex iterations) in 42.14 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%