Gurobi 5.0.1 (linux64) logging started Sat Nov 17 09:46:33 2012 Optimize a model with 77759 rows, 59292 columns and 291355 nonzeros Presolve removed 11 rows and 2673 columns (presolve time = 5s) ... Presolve removed 13 rows and 2675 columns Presolve time: 6.23s Presolved: 77746 rows, 56617 columns, 288042 nonzeros Variable types: 0 continuous, 56617 integer (56617 binary) Found heuristic solution: objective 243.0000000 Root relaxation: objective 2.000000e+00, 39846 iterations, 4.28 seconds Total elapsed time = 16.14s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 452 243.00000 2.00000 99.2% - 17s H 0 0 229.0000000 2.00000 99.1% - 18s H 0 0 4.0000000 2.00000 50.0% - 18s H 0 0 3.0000000 2.00000 33.3% - 18s 0 0 infeasible 0 3.00000 2.00000 33.3% - 19s Cutting planes: Gomory: 3 Clique: 4 Zero half: 62 Explored 0 nodes (134517 simplex iterations) in 19.07 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%