Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:02:35 2013 Optimize a model with 2069 rows, 69794 columns and 3777255 nonzeros Presolve removed 15 rows and 92 columns (presolve time = 5s) ... Presolve removed 19 rows and 133 columns (presolve time = 11s) ... Presolve removed 19 rows and 133 columns Presolve time: 13.02s Presolved: 2050 rows, 69661 columns, 3772845 nonzeros Variable types: 0 continuous, 69661 integer (69661 binary) Found heuristic solution: objective 31789.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7271 2.3745189e+04 4.388216e+02 0.000000e+00 5s 10846 2.4069954e+04 5.543376e+02 0.000000e+00 10s 12848 2.4127295e+04 1.496058e+03 0.000000e+00 15s 14993 2.4160937e+04 8.436625e+02 0.000000e+00 20s 16423 2.4165195e+04 2.141806e+02 0.000000e+00 25s 16478 2.4165208e+04 0.000000e+00 0.000000e+00 26s Root relaxation: objective 2.416521e+04, 16478 iterations, 25.77 seconds Total elapsed time = 40.42s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 24165.2083 0 146 31789.0000 24165.2083 24.0% - 41s H 0 0 28064.000000 24165.2083 13.9% - 43s H 0 0 24284.000000 24165.2083 0.49% - 44s H 0 0 24256.000000 24165.2083 0.37% - 45s 0 0 24172.0755 0 263 24256.0000 24172.0755 0.35% - 56s H 0 0 24245.000000 24172.0755 0.30% - 79s 0 0 24172.0755 0 104 24245.0000 24172.0755 0.30% - 91s 0 0 24172.2500 0 225 24245.0000 24172.2500 0.30% - 96s 0 0 24173.0000 0 145 24245.0000 24173.0000 0.30% - 102s 0 0 24174.0000 0 88 24245.0000 24174.0000 0.29% - 108s 0 0 24174.0000 0 62 24245.0000 24174.0000 0.29% - 112s * 0 0 0 24174.000000 24174.0000 0.0% - 114s Cutting planes: Clique: 16 Zero half: 11 Explored 0 nodes (40926 simplex iterations) in 114.65 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.417400000000e+04, best bound 2.417400000000e+04, gap 0.0000%