Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:43:52 2013 Optimize a model with 7175 rows, 1225 columns and 22050 nonzeros Presolve removed 1211 rows and 632 columns Presolve time: 0.05s Presolved: 5964 rows, 593 columns, 18435 nonzeros Variable types: 17 continuous, 576 integer (576 binary) Found heuristic solution: objective 26239.000000 Root relaxation: objective 1.918106e+04, 4050 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19181.0556 0 8 26239.0000 19181.0556 26.9% - 0s H 0 0 19187.000000 19181.0556 0.03% - 0s 0 0 19182.2046 0 21 19187.0000 19182.2046 0.02% - 0s 0 0 19182.2046 0 11 19187.0000 19182.2046 0.02% - 0s 0 0 19182.7339 0 22 19187.0000 19182.7339 0.02% - 0s 0 0 19183.3630 0 19 19187.0000 19183.3630 0.02% - 0s 0 0 19183.4973 0 25 19187.0000 19183.4973 0.02% - 0s 0 0 19183.5814 0 28 19187.0000 19183.5814 0.02% - 0s 0 0 19183.7800 0 28 19187.0000 19183.7800 0.02% - 0s 0 0 19183.9599 0 29 19187.0000 19183.9599 0.02% - 0s 0 0 19183.9867 0 27 19187.0000 19183.9867 0.02% - 0s 0 0 19184.2780 0 27 19187.0000 19184.2780 0.01% - 0s 0 0 19184.3436 0 29 19187.0000 19184.3436 0.01% - 0s 0 0 19184.3911 0 30 19187.0000 19184.3911 0.01% - 0s 0 0 19184.6192 0 23 19187.0000 19184.6192 0.01% - 0s 0 0 19184.6192 0 23 19187.0000 19184.6192 0.01% - 0s 0 2 19185.2580 0 23 19187.0000 19185.2580 0.01% - 0s Cutting planes: Gomory: 1 Implied bound: 2 Clique: 2 MIR: 17 Explored 1 nodes (4408 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.918700000000e+04, best bound 1.918600000000e+04, gap 0.0052%