Gurobi 5.0.1 (linux64) logging started Sat Nov 17 02:03:06 2012 Optimize a model with 51862 rows, 47306 columns and 201808 nonzeros Presolve removed 436 rows and 2 columns Presolve time: 1.29s Presolved: 51643 rows, 47304 columns, 247338 nonzeros Variable types: 0 continuous, 47304 integer (47304 binary) Found heuristic solution: objective 217.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 32411 3.0000740e+00 2.090000e+02 0.000000e+00 5s 39507 3.0000912e+00 5.441961e+01 0.000000e+00 10s 43513 3.0000000e+00 0.000000e+00 0.000000e+00 14s Root relaxation: objective 3.000000e+00, 43513 iterations, 14.45 seconds Total elapsed time = 20.72s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 56 217.00000 3.00000 98.6% - 21s H 0 0 3.0000000 3.00000 0.0% - 21s Explored 0 nodes (95714 simplex iterations) in 21.49 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%