current bounds on the number of colors: 0 -- 107 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:36 2012 Optimize a model with 3340 rows, 5732 columns and 15370 nonzeros Presolve removed 29 rows and 1537 columns Presolve time: 0.04s Presolved: 3311 rows, 4195 columns, 13833 nonzeros Variable types: 0 continuous, 4195 integer (4195 binary) Root relaxation: objective 0.000000e+00, 124 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 (124 simplex iterations) in 0.04 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 -- 53 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:36 2012 Optimize a model with 1693 rows, 2843 columns and 7540 nonzeros Presolve removed 29 rows and 754 columns Presolve time: 0.01s Presolved: 1664 rows, 2089 columns, 6786 nonzeros Variable types: 0 continuous, 2089 integer (2089 binary) Root relaxation: objective 0.000000e+00, 124 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 (124 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 -- 26 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:36 2012 Optimize a model with 900 rows, 1452 columns and 3770 nonzeros Presolve removed 29 rows and 377 columns Presolve time: 0.00s Presolved: 871 rows, 1075 columns, 3393 nonzeros Variable types: 0 continuous, 1075 integer (1075 binary) Root relaxation: objective 0.000000e+00, 128 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 (128 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 -- 13 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:36 2012 Optimize a model with 473 rows, 703 columns and 1740 nonzeros Presolve removed 29 rows and 174 columns Presolve time: 0.00s Presolved: 444 rows, 529 columns, 1566 nonzeros Variable types: 0 continuous, 529 integer (529 binary) Root relaxation: objective 0.000000e+00, 123 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 (123 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 16:15:36 2012 Optimize a model with 290 rows, 382 columns and 870 nonzeros Presolve removed 29 rows and 87 columns Presolve time: 0.00s Presolved: 261 rows, 295 columns, 783 nonzeros Variable types: 0 continuous, 295 integer (295 binary) Root relaxation: objective 0.000000e+00, 111 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 (111 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 16:15:36 2012 Optimize a model with 168 rows, 168 columns and 290 nonzeros Presolve removed 168 rows and 168 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 16:15:36 2012 Optimize a model with 229 rows, 275 columns and 580 nonzeros Presolve removed 121 rows and 157 columns Presolve time: 0.00s Presolved: 108 rows, 118 columns, 324 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Root relaxation: objective 0.000000e+00, 41 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 (41 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