Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:12:34 2012 Optimize a model with 7520 rows, 1056 columns and 23488 nonzeros Presolve time: 0.06s Presolved: 7520 rows, 1056 columns, 29493 nonzeros Variable types: 0 continuous, 1056 integer (1056 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.000000e+00, 2384 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 64 20.00000 2.00000 90.0% - 0s H 0 0 10.0000000 2.00000 80.0% - 0s H 0 0 8.0000000 2.00000 75.0% - 0s 0 0 2.00000 0 64 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 64 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 64 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 64 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 64 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 64 8.00000 2.00000 75.0% - 0s 0 2 2.00000 0 64 8.00000 2.00000 75.0% - 0s * 28 19 18 7.0000000 3.00000 57.1% 619 4s 54 16 3.50000 3 100 7.00000 3.00000 57.1% 455 5s 242 72 6.00000 5 107 7.00000 4.50000 35.7% 258 10s 404 104 5.50000 7 131 7.00000 5.00000 28.6% 238 15s 601 151 5.33333 10 64 7.00000 5.00000 28.6% 197 20s 608 156 6.00000 10 85 7.00000 6.00000 14.3% 195 25s 615 161 6.00000 12 74 7.00000 6.00000 14.3% 258 32s 620 165 6.00000 27 113 7.00000 6.00000 14.3% 283 36s 627 165 6.00000 29 113 7.00000 6.00000 14.3% 285 40s 648 163 6.00000 30 161 7.00000 6.00000 14.3% 291 45s 692 157 6.00000 35 101 7.00000 6.00000 14.3% 299 50s 744 139 6.00000 35 100 7.00000 6.00000 14.3% 307 55s 806 117 6.00000 37 112 7.00000 6.00000 14.3% 311 60s 864 83 infeasible 41 7.00000 6.00000 14.3% 316 65s 903 69 6.00000 30 128 7.00000 6.00000 14.3% 321 71s Explored 906 nodes (293191 simplex iterations) in 71.34 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%