current bounds on the number of colors: 0 -- 54

Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:26 2012

Optimize a model with 621 rows, 1479 columns and 3159 nonzeros
Presolve removed 24 rows and 648 columns
Presolve time: 0.01s
Presolved: 597 rows, 831 columns, 2511 nonzeros
Variable types: 0 continuous, 831 integer (831 binary)

Root relaxation: objective 0.000000e+00, 48 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 (48 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 -- 27

Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:26 2012

Optimize a model with 327 rows, 723 columns and 1521 nonzeros
Presolve removed 24 rows and 312 columns
Presolve time: 0.00s
Presolved: 303 rows, 411 columns, 1209 nonzeros
Variable types: 0 continuous, 411 integer (411 binary)

Root relaxation: objective 0.000000e+00, 50 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 (50 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 Sat Dec 15 16:13:26 2012

Optimize a model with 180 rows, 345 columns and 702 nonzeros
Presolve removed 24 rows and 144 columns
Presolve time: 0.00s
Presolved: 156 rows, 201 columns, 558 nonzeros
Variable types: 0 continuous, 201 integer (201 binary)

Root relaxation: objective 0.000000e+00, 45 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 (45 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 Sat Dec 15 16:13:26 2012

Optimize a model with 117 rows, 183 columns and 351 nonzeros
Presolve removed 24 rows and 72 columns
Presolve time: 0.00s
Presolved: 93 rows, 111 columns, 279 nonzeros
Variable types: 0 continuous, 111 integer (111 binary)

Root relaxation: objective 0.000000e+00, 40 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 (40 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 Sat Dec 15 16:13:26 2012

Optimize a model with 75 rows, 75 columns and 117 nonzeros
Presolve removed 75 rows and 75 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 Sat Dec 15 16:13:26 2012

Optimize a model with 96 rows, 129 columns and 234 nonzeros
Presolve removed 62 rows and 90 columns
Presolve time: 0.00s
Presolved: 34 rows, 39 columns, 102 nonzeros
Variable types: 0 continuous, 39 integer (39 binary)

Root relaxation: objective 0.000000e+00, 14 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 (14 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