Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:24:20 2013 Optimize a model with 2122 rows, 65240 columns and 3986776 nonzeros Presolve removed 45 rows and 255 columns (presolve time = 6s) ... Presolve removed 70 rows and 754 columns (presolve time = 11s) ... Presolve removed 75 rows and 883 columns (presolve time = 16s) ... Presolve removed 75 rows and 883 columns Presolve time: 17.41s Presolved: 2047 rows, 64357 columns, 3930079 nonzeros Variable types: 0 continuous, 64357 integer (64357 binary) Found heuristic solution: objective 34469.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7740 2.5938111e+04 1.367188e+03 0.000000e+00 5s 11432 2.6303402e+04 1.972595e+03 0.000000e+00 10s 14272 2.6435780e+04 7.328369e+02 0.000000e+00 15s 16970 2.6498911e+04 1.003122e+03 0.000000e+00 20s 19384 2.6519001e+04 2.140428e+03 0.000000e+00 25s 21163 2.6525000e+04 0.000000e+00 0.000000e+00 30s Root relaxation: objective 2.652500e+04, 21163 iterations, 29.82 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 26525.000000 26525.0000 0.0% - 47s Explored 0 nodes (21163 simplex iterations) in 47.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.652500000000e+04, best bound 2.652500000000e+04, gap 0.0000%