Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:55:49 2013 Optimize a model with 366275 rows, 16900 columns and 1106950 nonzeros Presolve removed 20529 rows and 8564 columns (presolve time = 5s) ... Presolve removed 20529 rows and 8564 columns Presolve time: 5.52s Presolved: 345746 rows, 8336 columns, 1043204 nonzeros Variable types: 47 continuous, 8289 integer (8289 binary) Found heuristic solution: objective 375015.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 13216 2.4989419e+05 0.000000e+00 4.636414e+08 5s 35518 2.6736296e+05 0.000000e+00 1.186212e+07 10s 57191 2.8150158e+05 0.000000e+00 0.000000e+00 15s 57191 2.8150158e+05 0.000000e+00 0.000000e+00 15s Root relaxation: objective 2.815016e+05, 57191 iterations, 14.84 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 281501.584 0 10 375015.000 281501.584 24.9% - 22s H 0 0 281512.00000 281501.584 0.00% - 22s Explored 0 nodes (57400 simplex iterations) in 22.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.815120000000e+05, best bound 2.815020000000e+05, gap 0.0036%