Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:52:39 2013 Optimize a model with 12383 rows, 1764 columns and 37926 nonzeros Presolve removed 1684 rows and 901 columns Presolve time: 0.09s Presolved: 10699 rows, 863 columns, 32992 nonzeros Variable types: 23 continuous, 840 integer (840 binary) Found heuristic solution: objective 30910.000000 Root relaxation: objective 2.006044e+04, 5721 iterations, 0.24 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 20060.4444 0 12 30910.0000 20060.4444 35.1% - 0s H 0 0 20081.000000 20060.4444 0.10% - 0s H 0 0 20076.000000 20060.4444 0.08% - 0s 0 0 20060.4444 0 22 20076.0000 20060.4444 0.08% - 0s 0 0 20060.4444 0 18 20076.0000 20060.4444 0.08% - 0s 0 0 20060.4444 0 35 20076.0000 20060.4444 0.08% - 0s H 0 0 20073.000000 20060.4444 0.06% - 0s 0 0 20060.4444 0 19 20073.0000 20060.4444 0.06% - 0s H 0 0 20071.000000 20060.4444 0.05% - 0s 0 2 20060.4444 0 15 20071.0000 20060.4444 0.05% - 0s H 64 42 20070.000000 20060.4444 0.05% 50.9 1s H 176 98 20069.000000 20060.4444 0.04% 33.6 1s H 187 100 20068.000000 20060.4444 0.04% 32.3 1s H 308 154 20067.000000 20060.4444 0.03% 30.7 1s H 632 299 20066.000000 20060.4444 0.03% 24.1 1s 4509 1782 cutoff 45 20066.0000 20061.4356 0.02% 21.7 5s 10211 3428 20062.1519 46 27 20066.0000 20061.9817 0.02% 20.8 10s 31068 5163 20063.6347 52 16 20066.0000 20061.9817 0.02% 12.6 15s 48815 6341 20064.6667 53 12 20066.0000 20062.4921 0.02% 10.8 20s 75835 3160 20065.0103 46 17 20066.0000 20063.9727 0.01% 9.5 25s Cutting planes: MIR: 4 Explored 76026 nodes (729799 simplex iterations) in 25.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.006600000000e+04, best bound 2.006400000000e+04, gap 0.0100%