Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:55:38 2013 Optimize a model with 24857 rows, 2809 columns and 75843 nonzeros Presolve removed 2654 rows and 1434 columns Presolve time: 0.17s Presolved: 22203 rows, 1375 columns, 67709 nonzeros Variable types: 22 continuous, 1353 integer (1353 binary) Found heuristic solution: objective 50253.000000 Root relaxation: objective 3.726060e+04, 5767 iterations, 0.32 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37260.6000 0 14 50253.0000 37260.6000 25.9% - 0s H 0 0 37276.000000 37260.6000 0.04% - 0s H 0 0 37271.000000 37260.6000 0.03% - 0s 0 0 37262.4538 0 21 37271.0000 37262.4538 0.02% - 0s 0 0 37262.4538 0 12 37271.0000 37262.4538 0.02% - 0s 0 0 37262.8572 0 30 37271.0000 37262.8572 0.02% - 0s 0 2 37262.9023 0 30 37271.0000 37262.9023 0.02% - 0s H 5 5 37270.000000 37264.0937 0.02% 0.6 0s H 6 6 37269.000000 37264.4501 0.01% 0.5 0s Cutting planes: Gomory: 5 MIR: 17 Zero half: 4 Explored 31 nodes (8326 simplex iterations) in 0.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.726900000000e+04, best bound 3.726600000000e+04, gap 0.0080%