current bounds on the number of colors: 0 -- 49 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:19 2012 Optimize a model with 385 rows, 1190 columns and 2184 nonzeros Presolve removed 28 rows and 672 columns Presolve time: 0.00s Presolved: 357 rows, 518 columns, 1512 nonzeros Variable types: 0 continuous, 518 integer (518 binary) Root relaxation: objective 0.000000e+00, 34 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 (34 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 -- 24 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:19 2012 Optimize a model with 217 rows, 602 columns and 1092 nonzeros Presolve removed 28 rows and 336 columns Presolve time: 0.00s Presolved: 189 rows, 266 columns, 756 nonzeros Variable types: 0 continuous, 266 integer (266 binary) Root relaxation: objective 0.000000e+00, 35 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 (35 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 -- 12 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:19 2012 Optimize a model with 133 rows, 308 columns and 546 nonzeros Presolve removed 28 rows and 168 columns Presolve time: 0.00s Presolved: 105 rows, 140 columns, 378 nonzeros Variable types: 0 continuous, 140 integer (140 binary) Root relaxation: objective 0.000000e+00, 32 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 (32 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:19 2012 Optimize a model with 91 rows, 161 columns and 273 nonzeros Presolve removed 28 rows and 84 columns Presolve time: 0.00s Presolved: 63 rows, 77 columns, 189 nonzeros Variable types: 0 continuous, 77 integer (77 binary) Root relaxation: objective 0.000000e+00, 32 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 (32 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:19 2012 Optimize a model with 63 rows, 63 columns and 91 nonzeros Presolve removed 63 rows and 63 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 - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:19 2012 Optimize a model with 77 rows, 112 columns and 182 nonzeros Presolve removed 55 rows and 86 columns Presolve time: 0.00s Presolved: 22 rows, 26 columns, 66 nonzeros Variable types: 0 continuous, 26 integer (26 binary) Root relaxation: objective 0.000000e+00, 10 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 (10 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% optimal solution found: number of colors: 2