Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:38:44 2013 Optimize a model with 2951 rows, 676 columns and 9126 nonzeros Presolve removed 448 rows and 340 columns Presolve time: 0.03s Presolved: 2503 rows, 336 columns, 7874 nonzeros Variable types: 16 continuous, 320 integer (320 binary) Found heuristic solution: objective 10571.000000 Root relaxation: objective 6.641800e+03, 2873 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 6641.80000 0 11 10571.0000 6641.80000 37.2% - 0s H 0 0 6676.0000000 6641.80000 0.51% - 0s H 0 0 6661.0000000 6641.80000 0.29% - 0s H 0 0 6649.0000000 6641.80000 0.11% - 0s 0 0 6642.00029 0 17 6649.00000 6642.00029 0.11% - 0s 0 0 6642.00029 0 10 6649.00000 6642.00029 0.11% - 0s 0 0 6642.00111 0 27 6649.00000 6642.00111 0.11% - 0s 0 0 6642.15404 0 29 6649.00000 6642.15404 0.10% - 0s 0 0 6642.21798 0 28 6649.00000 6642.21798 0.10% - 0s 0 0 6642.36265 0 31 6649.00000 6642.36265 0.10% - 0s 0 0 6642.51582 0 32 6649.00000 6642.51582 0.10% - 0s 0 0 6642.71220 0 28 6649.00000 6642.71220 0.09% - 0s 0 0 6642.82030 0 33 6649.00000 6642.82030 0.09% - 0s H 0 0 6647.0000000 6642.82030 0.06% - 0s 0 0 6642.82137 0 31 6647.00000 6642.82137 0.06% - 0s 0 0 6642.82973 0 36 6647.00000 6642.82973 0.06% - 0s 0 2 6642.87402 0 36 6647.00000 6642.87402 0.06% - 0s Cutting planes: Gomory: 2 Cover: 18 Implied bound: 1 MIR: 46 Zero half: 3 Mod-K: 1 Explored 316 nodes (6298 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.647000000000e+03, best bound 6.647000000000e+03, gap 0.0%