current bounds on the number of colors: 0 -- 87 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:31 2012 Optimize a model with 1936 rows, 3784 columns and 9288 nonzeros Presolve removed 33 rows and 1419 columns Presolve time: 0.02s Presolved: 1903 rows, 2365 columns, 7869 nonzeros Variable types: 0 continuous, 2365 integer (2365 binary) Root relaxation: objective 0.000000e+00, 92 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 (92 simplex iterations) in 0.02 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 -- 43 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:31 2012 Optimize a model with 990 rows, 1870 columns and 4536 nonzeros Presolve removed 33 rows and 693 columns Presolve time: 0.01s Presolved: 957 rows, 1177 columns, 3843 nonzeros Variable types: 0 continuous, 1177 integer (1177 binary) Root relaxation: objective 0.000000e+00, 92 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 (92 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:31 2012 Optimize a model with 517 rows, 913 columns and 2160 nonzeros Presolve removed 33 rows and 330 columns Presolve time: 0.00s Presolved: 484 rows, 583 columns, 1830 nonzeros Variable types: 0 continuous, 583 integer (583 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:31 2012 Optimize a model with 302 rows, 478 columns and 1080 nonzeros Presolve removed 33 rows and 165 columns Presolve time: 0.00s Presolved: 269 rows, 313 columns, 915 nonzeros Variable types: 0 continuous, 313 integer (313 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 16:14:31 2012 Optimize a model with 173 rows, 217 columns and 432 nonzeros Presolve removed 101 rows and 141 columns Presolve time: 0.00s Presolved: 72 rows, 76 columns, 216 nonzeros Variable types: 0 continuous, 76 integer (76 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 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:31 2012 Optimize a model with 130 rows, 130 columns and 216 nonzeros Presolve removed 130 rows and 130 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