current bounds on the number of colors: 0 -- 93 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:48 2012 Optimize a model with 2255 rows, 4325 columns and 10764 nonzeros Presolve removed 27 rows and 1242 columns Presolve time: 0.03s Presolved: 2228 rows, 3083 columns, 9522 nonzeros Variable types: 0 continuous, 3083 integer (3083 binary) Root relaxation: objective 0.000000e+00, 106 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 (106 simplex iterations) in 0.03 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 -- 46 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:48 2012 Optimize a model with 1174 rows, 2186 columns and 5382 nonzeros Presolve removed 27 rows and 621 columns Presolve time: 0.01s Presolved: 1147 rows, 1565 columns, 4761 nonzeros Variable types: 0 continuous, 1565 integer (1565 binary) Root relaxation: objective 0.000000e+00, 106 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 (106 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 -- 23 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:48 2012 Optimize a model with 610 rows, 1070 columns and 2574 nonzeros Presolve removed 27 rows and 297 columns Presolve time: 0.00s Presolved: 583 rows, 773 columns, 2277 nonzeros Variable types: 0 continuous, 773 integer (773 binary) Root relaxation: objective 0.000000e+00, 105 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 (105 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:48 2012 Optimize a model with 328 rows, 512 columns and 1170 nonzeros Presolve removed 27 rows and 135 columns Presolve time: 0.00s Presolved: 301 rows, 377 columns, 1035 nonzeros Variable types: 0 continuous, 377 integer (377 binary) Root relaxation: objective 0.000000e+00, 93 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 (93 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 16:14:48 2012 Optimize a model with 187 rows, 233 columns and 468 nonzeros Presolve removed 113 rows and 150 columns Presolve time: 0.00s Presolved: 74 rows, 83 columns, 222 nonzeros Variable types: 0 continuous, 83 integer (83 binary) Root relaxation: objective 0.000000e+00, 29 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 (29 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 16:14:48 2012 Optimize a model with 140 rows, 140 columns and 234 nonzeros Presolve removed 140 rows and 140 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