Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:30:10 2012 Optimize a model with 319 rows, 235 columns and 1030 nonzeros Presolve time: 0.00s Presolved: 319 rows, 235 columns, 1030 nonzeros Variable types: 0 continuous, 235 integer (235 binary) Found heuristic solution: objective 76.0000000 Root relaxation: objective 0.000000e+00, 121 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 76 76.00000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s H 0 0 58.0000000 0.00000 100% - 0s 0 0 0.52979 0 78 58.00000 0.52979 99.1% - 0s H 0 0 54.0000000 0.52979 99.0% - 0s 0 0 0.68940 0 87 54.00000 0.68940 98.7% - 0s H 0 0 50.0000000 0.68940 98.6% - 0s 0 0 0.70495 0 80 50.00000 0.70495 98.6% - 0s H 0 0 49.0000000 0.70495 98.6% - 0s 0 0 0.70755 0 81 49.00000 0.70755 98.6% - 0s H 0 0 46.0000000 0.70755 98.5% - 0s 0 2 0.71752 0 81 46.00000 0.71752 98.4% - 0s * 40 37 24 34.0000000 3.48144 89.8% 19.9 0s * 74 60 19 33.0000000 3.50203 89.4% 21.0 0s * 75 54 19 32.0000000 3.50203 89.1% 20.9 0s * 106 73 19 30.0000000 5.37919 82.1% 21.1 0s * 807 356 28 29.0000000 11.50621 60.3% 22.4 0s * 3794 678 28 28.0000000 18.91304 32.5% 20.1 3s 7043 685 26.94118 23 94 28.00000 21.24390 24.1% 19.1 5s Explored 11064 nodes (201773 simplex iterations) in 7.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%