Gurobi 5.0.1 (linux64) logging started Wed Dec 19 18:32:10 2012 Optimize a model with 3842 rows, 3721 columns and 22262 nonzeros Presolve removed 2400 rows and 2563 columns Presolve time: 0.09s Presolved: 1442 rows, 1158 columns, 13400 nonzeros Variable types: 55 continuous, 1103 integer (1103 binary) Root relaxation: objective 5.165362e+02, 245 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 516.53619 0 75 - 516.53619 - - 0s 0 0 524.78995 0 52 - 524.78995 - - 0s 0 0 525.39748 0 55 - 525.39748 - - 0s 0 0 526.20146 0 49 - 526.20146 - - 0s 0 0 526.21984 0 52 - 526.21984 - - 0s 0 0 526.26872 0 53 - 526.26872 - - 0s 0 0 526.35101 0 53 - 526.35101 - - 0s 0 0 526.35101 0 53 - 526.35101 - - 0s 0 0 526.35101 0 52 - 526.35101 - - 0s 0 0 526.35101 0 53 - 526.35101 - - 0s 0 0 526.35101 0 53 - 526.35101 - - 0s H 0 0 541.0000000 526.35101 2.71% - 0s H 0 0 533.0000000 526.35101 1.25% - 0s 0 0 526.35101 0 54 533.00000 526.35101 1.25% - 0s 0 0 527.45346 0 54 533.00000 527.45346 1.04% - 0s 0 0 528.25678 0 61 533.00000 528.25678 0.89% - 0s 0 0 528.28534 0 52 533.00000 528.28534 0.88% - 0s 0 0 528.28534 0 52 533.00000 528.28534 0.88% - 0s 0 0 529.82483 0 26 533.00000 529.82483 0.60% - 0s 0 0 530.50000 0 20 533.00000 530.50000 0.47% - 0s 0 0 530.50000 0 20 533.00000 530.50000 0.47% - 0s 0 2 531.00000 0 12 533.00000 531.00000 0.38% - 0s Cutting planes: Learned: 3 Gomory: 1 Cover: 1 Clique: 1 MIR: 5 GUB cover: 7 Mod-K: 1 Explored 5 nodes (1049 simplex iterations) in 0.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.330000000000e+02, best bound 5.330000000000e+02, gap 0.0%