current bounds on the number of colors: 0 -- 76 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:04 2012 Optimize a model with 1102 rows, 2915 columns and 5966 nonzeros Presolve removed 39 rows and 1482 columns Presolve time: 0.01s Presolved: 1063 rows, 1433 columns, 4484 nonzeros Variable types: 0 continuous, 1433 integer (1433 binary) Root relaxation: objective 0.000000e+00, 60 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (60 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 38 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:04 2012 Optimize a model with 589 rows, 1471 columns and 2983 nonzeros Presolve removed 39 rows and 741 columns Presolve time: 0.00s Presolved: 550 rows, 730 columns, 2242 nonzeros Variable types: 0 continuous, 730 integer (730 binary) Root relaxation: objective 0.000000e+00, 60 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (60 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:04 2012 Optimize a model with 319 rows, 711 columns and 1413 nonzeros Presolve removed 39 rows and 351 columns Presolve time: 0.00s Presolved: 280 rows, 360 columns, 1062 nonzeros Variable types: 0 continuous, 360 integer (360 binary) Root relaxation: objective 0.000000e+00, 59 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (59 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:04 2012 Optimize a model with 184 rows, 331 columns and 628 nonzeros Presolve removed 39 rows and 156 columns Presolve time: 0.00s Presolved: 145 rows, 175 columns, 472 nonzeros Variable types: 0 continuous, 175 integer (175 binary) Root relaxation: objective 0.000000e+00, 54 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (54 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:04 2012 Optimize a model with 130 rows, 179 columns and 314 nonzeros Presolve removed 88 rows and 133 columns Presolve time: 0.00s Presolved: 42 rows, 46 columns, 126 nonzeros Variable types: 0 continuous, 46 integer (46 binary) Root relaxation: objective 0.000000e+00, 15 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (15 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:04 2012 Optimize a model with 103 rows, 103 columns and 157 nonzeros Presolve removed 103 rows and 103 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 2