Gurobi 5.0.1 (linux64) logging started Sat Nov 17 00:45:32 2012 Optimize a model with 47651 rows, 43890 columns and 185799 nonzeros Presolve removed 420 rows and 2 columns Presolve time: 1.13s Presolved: 47440 rows, 43888 columns, 227983 nonzeros Variable types: 0 continuous, 43888 integer (43888 binary) Found heuristic solution: objective 209.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 35047 3.0000827e+00 2.335000e+01 0.000000e+00 5s 41063 3.0000909e+00 6.987109e+02 0.000000e+00 10s 45287 3.0000948e+00 4.109137e+01 0.000000e+00 15s 48937 3.0000000e+00 0.000000e+00 0.000000e+00 19s Root relaxation: objective 3.000000e+00, 48937 iterations, 19.19 seconds Total elapsed time = 47.48s Total elapsed time = 50.36s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 82 209.00000 3.00000 98.6% - 56s H 0 0 3.0000000 3.00000 0.0% - 56s Explored 0 nodes (118433 simplex iterations) in 56.29 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%