current bounds on the number of colors: 0 -- 27

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:24 2012

Optimize a model with 274 rows, 370 columns and 1092 nonzeros
Presolve removed 7 rows and 91 columns
Presolve time: 0.00s
Presolved: 267 rows, 279 columns, 1001 nonzeros
Variable types: 0 continuous, 279 integer (279 binary)

Root relaxation: objective 0.000000e+00, 35 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 (35 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 -- 13

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:24 2012

Optimize a model with 141 rows, 181 columns and 504 nonzeros
Presolve removed 7 rows and 42 columns
Presolve time: 0.00s
Presolved: 134 rows, 139 columns, 462 nonzeros
Variable types: 0 continuous, 139 integer (139 binary)

Root relaxation: objective 0.000000e+00, 33 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 (33 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 18:19:24 2012

Optimize a model with 84 rows, 100 columns and 252 nonzeros
Presolve removed 7 rows and 21 columns
Presolve time: 0.00s
Presolved: 77 rows, 79 columns, 231 nonzeros
Variable types: 0 continuous, 79 integer (79 binary)

Root relaxation: objective 0.000000e+00, 31 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 (31 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 18:19:24 2012

Optimize a model with 46 rows, 46 columns and 84 nonzeros
Presolve removed 46 rows and 46 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 18:19:24 2012

Optimize a model with 65 rows, 73 columns and 168 nonzeros
Presolve removed 31 rows and 40 columns
Presolve time: 0.00s
Presolved: 34 rows, 33 columns, 102 nonzeros
Variable types: 0 continuous, 33 integer (33 binary)

Root relaxation: objective 0.000000e+00, 13 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 (13 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