current bounds on the number of colors: 0 -- 84 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:23 2012 Optimize a model with 1638 rows, 3565 columns and 8190 nonzeros Presolve removed 31 rows and 1302 columns Presolve time: 0.02s Presolved: 1607 rows, 2263 columns, 6888 nonzeros Variable types: 0 continuous, 2263 integer (2263 binary) Root relaxation: objective 0.000000e+00, 83 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 (83 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 -- 42 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:23 2012 Optimize a model with 861 rows, 1801 columns and 4095 nonzeros Presolve removed 31 rows and 651 columns Presolve time: 0.01s Presolved: 830 rows, 1150 columns, 3444 nonzeros Variable types: 0 continuous, 1150 integer (1150 binary) Root relaxation: objective 0.000000e+00, 83 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 (83 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:23 2012 Optimize a model with 454 rows, 877 columns and 1950 nonzeros Presolve removed 31 rows and 310 columns Presolve time: 0.00s Presolved: 423 rows, 567 columns, 1640 nonzeros Variable types: 0 continuous, 567 integer (567 binary) Root relaxation: objective 0.000000e+00, 84 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 (84 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 16:14:23 2012 Optimize a model with 269 rows, 457 columns and 975 nonzeros Presolve removed 31 rows and 155 columns Presolve time: 0.00s Presolved: 238 rows, 302 columns, 820 nonzeros Variable types: 0 continuous, 302 integer (302 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 0.00 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 16:14:23 2012 Optimize a model with 158 rows, 205 columns and 390 nonzeros Presolve removed 106 rows and 148 columns Presolve time: 0.00s Presolved: 52 rows, 57 columns, 156 nonzeros Variable types: 0 continuous, 57 integer (57 binary) Root relaxation: objective 0.000000e+00, 20 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 (20 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 16:14:23 2012 Optimize a model with 121 rows, 121 columns and 195 nonzeros Presolve removed 121 rows and 121 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