Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:24:44 2013 Optimize a model with 1447 rows, 28893 columns and 1760701 nonzeros Presolve removed 105 rows and 759 columns (presolve time = 5s) ... Presolve removed 105 rows and 759 columns Presolve time: 6.14s Presolved: 1342 rows, 28134 columns, 1704819 nonzeros Variable types: 0 continuous, 28134 integer (28134 binary) Found heuristic solution: objective 16400.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 8877 1.2193000e+04 6.100840e+00 0.000000e+00 5s 9093 1.2193000e+04 0.000000e+00 0.000000e+00 6s Root relaxation: objective 1.219300e+04, 9093 iterations, 5.54 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12193.0000 0 42 16400.0000 12193.0000 25.7% - 12s H 0 0 12530.000000 12193.0000 2.69% - 13s H 0 0 12368.000000 12193.0000 1.41% - 13s 0 0 12196.5000 0 44 12368.0000 12196.5000 1.39% - 17s H 0 0 12316.000000 12196.5000 0.97% - 27s * 0 0 0 12199.000000 12199.0000 0.0% - 31s Explored 0 nodes (19340 simplex iterations) in 31.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.219900000000e+04, best bound 1.219900000000e+04, gap 0.0%