Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:53:50 2012 Optimize a model with 57791 rows, 50400 columns and 222654 nonzeros Presolve removed 463 rows and 2914 columns Presolve time: 1.52s Presolved: 57328 rows, 47486 columns, 218110 nonzeros Variable types: 0 continuous, 47486 integer (47486 binary) Found heuristic solution: objective 224.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 42675 3.0000872e+00 1.870455e+01 0.000000e+00 5s 49643 3.0000983e+00 5.607836e+01 0.000000e+00 10s 54230 3.0001045e+00 1.026777e+01 0.000000e+00 15s 57500 3.0000000e+00 0.000000e+00 0.000000e+00 19s Root relaxation: objective 3.000000e+00, 57500 iterations, 18.62 seconds Total elapsed time = 64.01s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 3.0000000 3.00000 0.0% - 75s Explored 0 nodes (137455 simplex iterations) in 75.67 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%