current bounds on the number of colors: 0 -- 80 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:12 2012 Optimize a model with 1560 rows, 3237 columns and 7640 nonzeros Presolve removed 31 rows and 1240 columns Presolve time: 0.02s Presolved: 1529 rows, 1997 columns, 6400 nonzeros Variable types: 0 continuous, 1997 integer (1997 binary) Root relaxation: objective 0.000000e+00, 82 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 (82 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 -- 40 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:12 2012 Optimize a model with 820 rows, 1637 columns and 3820 nonzeros Presolve removed 31 rows and 620 columns Presolve time: 0.01s Presolved: 789 rows, 1017 columns, 3200 nonzeros Variable types: 0 continuous, 1017 integer (1017 binary) Root relaxation: objective 0.000000e+00, 81 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 (81 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 16:14:12 2012 Optimize a model with 450 rows, 837 columns and 1910 nonzeros Presolve removed 31 rows and 310 columns Presolve time: 0.00s Presolved: 419 rows, 527 columns, 1600 nonzeros Variable types: 0 continuous, 527 integer (527 binary) Root relaxation: objective 0.000000e+00, 82 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 (82 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 16:14:12 2012 Optimize a model with 265 rows, 437 columns and 955 nonzeros Presolve removed 31 rows and 155 columns Presolve time: 0.00s Presolved: 234 rows, 282 columns, 800 nonzeros Variable types: 0 continuous, 282 integer (282 binary) Root relaxation: objective 0.000000e+00, 74 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 (74 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 16:14:12 2012 Optimize a model with 154 rows, 197 columns and 382 nonzeros Presolve removed 90 rows and 126 columns Presolve time: 0.00s Presolved: 64 rows, 71 columns, 192 nonzeros Variable types: 0 continuous, 71 integer (71 binary) Root relaxation: objective 0.000000e+00, 30 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 (30 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 16:14:12 2012 Optimize a model with 117 rows, 117 columns and 191 nonzeros Presolve removed 117 rows and 117 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