Gurobi 5.0.1 (linux64) logging started Sat Nov 17 05:49:08 2012 Optimize a model with 63432 rows, 52670 columns and 241822 nonzeros Presolve removed 918 rows and 2 columns Presolve time: 4.69s Presolved: 62743 rows, 52668 columns, 291427 nonzeros Variable types: 0 continuous, 52668 integer (52668 binary) Found heuristic solution: objective 229.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 36346 3.0000697e+00 3.000000e+02 0.000000e+00 5s 43610 3.0000989e+00 3.728098e+01 0.000000e+00 10s 47090 3.0001021e+00 3.471918e+01 0.000000e+00 15s 50425 3.0001047e+00 3.637434e+01 0.000000e+00 20s 53470 3.0001065e+00 1.005152e+01 0.000000e+00 25s 56474 3.0001070e+00 0.000000e+00 0.000000e+00 30s Root relaxation: objective 3.000000e+00, 56474 iterations, 30.04 seconds Total elapsed time = 87.66s Total elapsed time = 90.11s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 137 229.00000 3.00000 98.7% - 91s H 0 0 4.0000000 3.00000 25.0% - 91s H 0 0 3.0000000 3.00000 0.0% - 92s Explored 0 nodes (142932 simplex iterations) in 92.14 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%