Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:47:16 2012 Optimize a model with 6420 rows, 930 columns and 20070 nonzeros Presolve time: 0.06s Presolved: 6420 rows, 930 columns, 26961 nonzeros Variable types: 0 continuous, 930 integer (930 binary) Found heuristic solution: objective 18.0000000 Root relaxation: objective 2.000000e+00, 917 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 60 18.00000 2.00000 88.9% - 0s H 0 0 12.0000000 2.00000 83.3% - 0s H 0 0 9.0000000 2.00000 77.8% - 0s 0 0 2.00000 0 60 9.00000 2.00000 77.8% - 0s H 0 0 8.0000000 2.00000 75.0% - 0s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 1s H 0 0 7.0000000 2.00000 71.4% - 1s 0 0 2.00000 0 60 7.00000 2.00000 71.4% - 1s 0 0 2.00000 0 60 7.00000 2.00000 71.4% - 2s 0 0 2.00000 0 60 7.00000 2.00000 71.4% - 2s 0 2 2.00000 0 60 7.00000 2.00000 71.4% - 4s 1 3 3.00000 1 56 7.00000 2.00000 71.4% 5217 5s 104 54 4.40000 7 88 7.00000 3.50000 50.0% 407 10s 281 97 6.00000 11 58 7.00000 4.00000 42.9% 299 15s 471 143 6.00000 13 46 7.00000 4.00000 42.9% 261 22s 547 167 5.33333 12 129 7.00000 4.33333 38.1% 259 25s 608 194 6.00000 9 60 7.00000 6.00000 14.3% 275 30s 614 200 6.00000 27 101 7.00000 6.00000 14.3% 298 35s 621 203 infeasible 31 7.00000 6.00000 14.3% 300 40s 661 189 6.00000 32 48 7.00000 6.00000 14.3% 303 45s 706 169 6.00000 33 103 7.00000 6.00000 14.3% 311 50s Explored 729 nodes (240271 simplex iterations) in 52.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%