Gurobi 5.0.1 (linux64) logging started Mon Feb 4 20:03:32 2013 Optimize a model with 457450 rows, 19600 columns and 1381800 nonzeros Presolve removed 21890 rows and 9897 columns (presolve time = 5s) ... Presolve removed 21890 rows and 9897 columns Presolve time: 5.91s Presolved: 435560 rows, 9703 columns, 1315168 nonzeros Variable types: 62 continuous, 9641 integer (9641 binary) Found heuristic solution: objective 440937.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 9450 2.6592228e+05 0.000000e+00 3.792538e+08 5s 21735 2.7200135e+05 0.000000e+00 8.823073e+08 10s 36855 2.7719332e+05 0.000000e+00 1.065351e+09 15s 53930 2.8656608e+05 0.000000e+00 3.395773e+09 20s 74720 2.9794018e+05 0.000000e+00 1.043538e+08 25s 94570 3.1643806e+05 0.000000e+00 9.102160e+06 30s 97666 3.1757420e+05 0.000000e+00 0.000000e+00 33s 97666 3.1757420e+05 0.000000e+00 0.000000e+00 33s Root relaxation: objective 3.175742e+05, 97666 iterations, 33.35 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 317574.201 0 17 440937.000 317574.201 28.0% - 41s H 0 0 317595.00000 317574.201 0.01% - 41s Explored 0 nodes (97828 simplex iterations) in 41.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.175950000000e+05, best bound 3.175750000000e+05, gap 0.0063%