Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:56:28 2013 Optimize a model with 2700 rows, 27100 columns and 58050 nonzeros Presolve removed 150 rows and 100 columns Presolve time: 0.22s Presolved: 2550 rows, 27000 columns, 55900 nonzeros Variable types: 26050 continuous, 950 integer (950 binary) Root relaxation: objective 1.824192e+05, 4343 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 182419.206 0 1 - 182419.206 - - 0s H 0 0 199449.94651 182419.206 8.54% - 0s 0 0 182445.503 0 2 199449.947 182445.503 8.53% - 0s 0 0 182459.949 0 2 199449.947 182459.949 8.52% - 0s 0 0 182472.253 0 2 199449.947 182472.253 8.51% - 0s 0 0 182483.750 0 2 199449.947 182483.750 8.51% - 0s 0 0 182489.934 0 2 199449.947 182489.934 8.50% - 0s 0 0 182492.257 0 2 199449.947 182492.257 8.50% - 0s 0 0 182495.039 0 2 199449.947 182495.039 8.50% - 0s 0 0 182497.670 0 2 199449.947 182497.670 8.50% - 1s 0 0 182499.387 0 2 199449.947 182499.387 8.50% - 1s 0 0 182499.619 0 3 199449.947 182499.619 8.50% - 1s 0 2 182499.967 0 3 199449.947 182499.967 8.50% - 1s H 9 6 182907.07060 182701.496 0.11% 44.4 1s * 13 4 9 182879.22514 182701.496 0.10% 41.8 1s Cutting planes: Flow cover: 14 Explored 44 nodes (5442 simplex iterations) in 2.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.828792251419e+05, best bound 1.828618442588e+05, gap 0.0095%