Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:09:00 2012 Optimize a model with 2989 rows, 552 columns and 9405 nonzeros Presolve removed 305 rows and 2 columns Presolve time: 0.07s Presolved: 2707 rows, 550 columns, 14560 nonzeros Variable types: 0 continuous, 550 integer (550 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 5.000000e+00, 2724 iterations, 0.34 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 97 23.00000 5.00000 78.3% - 0s H 0 0 7.0000000 5.00000 28.6% - 0s 0 0 5.00000 0 96 7.00000 5.00000 28.6% - 0s 0 0 5.00000 0 321 7.00000 5.00000 28.6% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 73 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 107 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 89 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 64 6.00000 5.00000 16.7% - 3s 0 0 5.00000 0 236 6.00000 5.00000 16.7% - 3s 0 0 5.00000 0 180 6.00000 5.00000 16.7% - 4s 0 0 5.00000 0 184 6.00000 5.00000 16.7% - 4s 0 0 5.00000 0 124 6.00000 5.00000 16.7% - 4s 0 0 5.00000 0 97 6.00000 5.00000 16.7% - 5s 0 0 5.00000 0 106 6.00000 5.00000 16.7% - 6s 0 0 5.00000 0 106 6.00000 5.00000 16.7% - 6s 0 2 5.00000 0 106 6.00000 5.00000 16.7% - 6s Explored 3 nodes (42590 simplex iterations) in 7.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%