Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:03:16 2012 Optimize a model with 1682 rows, 1681 columns and 7429 nonzeros Presolve removed 1478 rows and 1219 columns Presolve time: 0.01s Presolved: 204 rows, 462 columns, 1777 nonzeros Variable types: 29 continuous, 433 integer (433 binary) Root relaxation: objective 5.258022e+02, 86 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 525.80217 0 18 - 525.80217 - - 0s H 0 0 573.0000000 525.80217 8.24% - 0s H 0 0 566.0000000 525.80217 7.10% - 0s 0 0 533.92357 0 32 566.00000 533.92357 5.67% - 0s H 0 0 564.0000000 533.92357 5.33% - 0s 0 0 536.00000 0 25 564.00000 536.00000 4.96% - 0s 0 0 536.00000 0 18 564.00000 536.00000 4.96% - 0s 0 0 536.00000 0 33 564.00000 536.00000 4.96% - 0s 0 0 538.56085 0 25 564.00000 538.56085 4.51% - 0s 0 0 538.56085 0 25 564.00000 538.56085 4.51% - 0s 0 0 540.96085 0 21 564.00000 540.96085 4.08% - 0s 0 0 546.75556 0 19 564.00000 546.75556 3.06% - 0s H 0 0 559.0000000 546.75556 2.19% - 0s H 0 0 557.0000000 546.75556 1.84% - 0s H 0 0 554.0000000 546.75556 1.31% - 0s 0 2 547.06187 0 18 554.00000 547.06187 1.25% - 0s * 3 3 3 552.0000000 548.82609 0.57% 8.3 0s Cutting planes: Learned: 1 Gomory: 2 Cover: 1 Implied bound: 3 Clique: 2 MIR: 1 GUB cover: 2 Explored 6 nodes (401 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.520000000000e+02, best bound 5.520000000000e+02, gap 0.0%