Gurobi 5.0.1 (linux64) logging started Sat Nov 17 10:59:39 2012 Optimize a model with 78298 rows, 61256 columns and 294916 nonzeros Presolve removed 13 rows and 3211 columns (presolve time = 5s) ... Presolve removed 15 rows and 3213 columns Presolve time: 6.32s Presolved: 78283 rows, 58043 columns, 291071 nonzeros Variable types: 0 continuous, 58043 integer (58043 binary) Found heuristic solution: objective 247.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 43241 2.0002581e+00 1.750000e+01 0.000000e+00 5s 43713 2.0000000e+00 0.000000e+00 0.000000e+00 5s Root relaxation: objective 2.000000e+00, 43713 iterations, 5.24 seconds Total elapsed time = 17.48s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 468 247.00000 2.00000 99.2% - 19s H 0 0 237.0000000 2.00000 99.2% - 19s H 0 0 4.0000000 2.00000 50.0% - 19s H 0 0 3.0000000 2.00000 33.3% - 19s 0 0 infeasible 0 3.00000 2.00000 33.3% - 19s Cutting planes: Gomory: 1 Zero half: 60 Explored 0 nodes (138240 simplex iterations) in 19.96 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%