Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:17:07 2012 Optimize a model with 7936 rows, 1056 columns and 24736 nonzeros Presolve time: 0.06s Presolved: 7936 rows, 1056 columns, 30381 nonzeros Variable types: 0 continuous, 1056 integer (1056 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 2.000000e+00, 598 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 64 23.00000 2.00000 91.3% - 0s H 0 0 12.0000000 2.00000 83.3% - 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% - 1s 0 0 2.00000 0 64 8.00000 2.00000 75.0% - 1s 0 0 2.00000 0 64 8.00000 2.00000 75.0% - 2s H 0 0 7.0000000 2.00000 71.4% - 2s 0 0 2.00000 0 64 7.00000 2.00000 71.4% - 3s 0 0 2.00000 0 64 7.00000 2.00000 71.4% - 3s 0 2 2.00000 0 64 7.00000 2.00000 71.4% - 5s 31 17 4.00000 3 58 7.00000 3.00000 57.1% 809 10s 157 43 6.00000 11 52 7.00000 4.00000 42.9% 389 15s 325 64 cutoff 12 7.00000 5.00000 28.6% 298 20s 447 74 6.00000 16 56 7.00000 5.00000 28.6% 295 25s 588 83 6.00000 7 54 7.00000 5.00000 28.6% 265 30s 607 92 6.00000 10 64 7.00000 6.00000 14.3% 287 35s 612 97 6.00000 27 142 7.00000 6.00000 14.3% 306 40s 615 99 6.00000 28 149 7.00000 6.00000 14.3% 309 46s 619 102 6.00000 30 143 7.00000 6.00000 14.3% 310 50s 645 95 6.00000 30 136 7.00000 6.00000 14.3% 325 55s 705 77 6.00000 30 96 7.00000 6.00000 14.3% 321 60s 745 60 6.00000 32 96 7.00000 6.00000 14.3% 331 65s 769 52 infeasible 36 7.00000 6.00000 14.3% 340 70s 783 47 6.00000 34 87 7.00000 6.00000 14.3% 349 75s 814 36 infeasible 38 7.00000 6.00000 14.3% 366 80s 835 26 infeasible 37 7.00000 6.00000 14.3% 382 88s 843 21 6.00000 36 86 7.00000 6.00000 14.3% 387 90s Explored 848 nodes (342528 simplex iterations) in 91.87 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%