current bounds on the number of colors: 0 -- 24

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:22 2012

Optimize a model with 168 rows, 300 columns and 720 nonzeros
Presolve removed 6 rows and 72 columns
Presolve time: 0.00s
Presolved: 162 rows, 228 columns, 648 nonzeros
Variable types: 0 continuous, 228 integer (228 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 -- 12

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:22 2012

Optimize a model with 96 rows, 156 columns and 360 nonzeros
Presolve removed 6 rows and 36 columns
Presolve time: 0.00s
Presolved: 90 rows, 120 columns, 324 nonzeros
Variable types: 0 continuous, 120 integer (120 binary)

Root relaxation: objective 0.000000e+00, 27 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 (27 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 Fri Dec 14 18:19:22 2012

Optimize a model with 60 rows, 84 columns and 180 nonzeros
Presolve removed 6 rows and 18 columns
Presolve time: 0.00s
Presolved: 54 rows, 66 columns, 162 nonzeros
Variable types: 0 continuous, 66 integer (66 binary)

Root relaxation: objective 0.000000e+00, 26 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 (26 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 Fri Dec 14 18:19:22 2012

Optimize a model with 36 rows, 36 columns and 60 nonzeros
Presolve removed 36 rows and 36 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 Fri Dec 14 18:19:22 2012

Optimize a model with 48 rows, 60 columns and 120 nonzeros
Presolve removed 32 rows and 42 columns
Presolve time: 0.00s
Presolved: 16 rows, 18 columns, 48 nonzeros
Variable types: 0 continuous, 18 integer (18 binary)

Root relaxation: objective 0.000000e+00, 7 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 (7 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