current bounds on the number of colors: 0 -- 82 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:17 2012 Optimize a model with 1435 rows, 3395 columns and 7421 nonzeros Presolve removed 36 rows and 1476 columns Presolve time: 0.02s Presolved: 1399 rows, 1919 columns, 5945 nonzeros Variable types: 0 continuous, 1919 integer (1919 binary) Root relaxation: objective 0.000000e+00, 75 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 (75 simplex iterations) in 0.02 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 -- 41 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:17 2012 Optimize a model with 742 rows, 1673 columns and 3620 nonzeros Presolve removed 36 rows and 720 columns Presolve time: 0.01s Presolved: 706 rows, 953 columns, 2900 nonzeros Variable types: 0 continuous, 953 integer (953 binary) Root relaxation: objective 0.000000e+00, 75 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 (75 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 -- 20 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:18 2012 Optimize a model with 412 rows, 853 columns and 1810 nonzeros Presolve removed 36 rows and 360 columns Presolve time: 0.00s Presolved: 376 rows, 493 columns, 1450 nonzeros Variable types: 0 continuous, 493 integer (493 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:18 2012 Optimize a model with 247 rows, 443 columns and 905 nonzeros Presolve removed 36 rows and 180 columns Presolve time: 0.00s Presolved: 211 rows, 263 columns, 725 nonzeros Variable types: 0 continuous, 263 integer (263 binary) Root relaxation: objective 0.000000e+00, 66 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 (66 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:18 2012 Optimize a model with 148 rows, 197 columns and 362 nonzeros Presolve removed 100 rows and 145 columns Presolve time: 0.00s Presolved: 48 rows, 52 columns, 144 nonzeros Variable types: 0 continuous, 52 integer (52 binary) Root relaxation: objective 0.000000e+00, 23 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 (23 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 16:14:18 2012 Optimize a model with 115 rows, 115 columns and 181 nonzeros Presolve removed 115 rows and 115 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