Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:56:47 2013 Optimize a model with 29316 rows, 3136 columns and 89376 nonzeros Presolve removed 1989 rows and 1573 columns Presolve time: 0.19s Presolved: 27327 rows, 1563 columns, 83624 nonzeros Variable types: 31 continuous, 1532 integer (1532 binary) Found heuristic solution: objective 60846.000000 Root relaxation: objective 4.166593e+04, 11799 iterations, 0.73 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41665.9333 0 10 60846.0000 41665.9333 31.5% - 1s H 0 0 41676.000000 41665.9333 0.02% - 1s H 0 0 41673.000000 41665.9333 0.02% - 1s 0 0 41667.3969 0 23 41673.0000 41667.3969 0.01% - 1s 0 0 41667.3969 0 13 41673.0000 41667.3969 0.01% - 1s 0 0 41667.5302 0 27 41673.0000 41667.5302 0.01% - 1s 0 0 41667.9511 0 33 41673.0000 41667.9511 0.01% - 1s 0 2 41668.2596 0 33 41673.0000 41668.2596 0.01% - 1s H 9 8 41672.000000 41668.7642 0.01% 3.9 1s Cutting planes: Gomory: 3 MIR: 12 Zero half: 5 Explored 9 nodes (13116 simplex iterations) in 1.49 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.167200000000e+04, best bound 4.166900000000e+04, gap 0.0072%