current bounds on the number of colors: 0 -- 105 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:44 2012 Optimize a model with 14145 rows, 5730 columns and 47580 nonzeros Presolve removed 1 rows and 52 columns Presolve time: 0.10s Presolved: 14144 rows, 5678 columns, 47528 nonzeros Variable types: 0 continuous, 5678 integer (5678 binary) Root relaxation: objective 0.000000e+00, 278 iterations, 0.01 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 (278 simplex iterations) in 0.11 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 -- 52 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:44 2012 Optimize a model with 7125 rows, 3000 columns and 23790 nonzeros Presolve removed 1 rows and 26 columns Presolve time: 0.03s Presolved: 7124 rows, 2974 columns, 23764 nonzeros Variable types: 0 continuous, 2974 integer (2974 binary) Root relaxation: objective 0.000000e+00, 242 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 (417 simplex iterations) in 0.05 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 Fri Dec 14 18:25:44 2012 Optimize a model with 3615 rows, 1635 columns and 11895 nonzeros Presolve removed 1 rows and 13 columns Presolve time: 0.01s Presolved: 3614 rows, 1622 columns, 11882 nonzeros Variable types: 0 continuous, 1622 integer (1622 binary) Root relaxation: objective 0.000000e+00, 223 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 (382 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:45 2012 Optimize a model with 1725 rows, 900 columns and 5490 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.01s Presolved: 1724 rows, 894 columns, 5484 nonzeros Variable types: 0 continuous, 894 integer (894 binary) Root relaxation: objective 0.000000e+00, 229 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 (526 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:45 2012 Optimize a model with 915 rows, 585 columns and 2745 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 914 rows, 582 columns, 2742 nonzeros Variable types: 0 continuous, 582 integer (582 binary) Root relaxation: objective 0.000000e+00, 240 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 188 - 0.00000 - - 0s 0 0 0.00000 0 197 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 0 0.00000 0 186 - 0.00000 - - 0s 0 0 0.00000 0 229 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 163 - 0.00000 - - 0s 0 0 0.00000 0 219 - 0.00000 - - 0s 0 0 0.00000 0 233 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 2 0.00000 0 201 - 0.00000 - - 0s Cutting planes: Zero half: 5 Explored 7 nodes (7920 simplex iterations) in 0.44 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:45 2012 Optimize a model with 1185 rows, 690 columns and 3660 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1184 rows, 686 columns, 3656 nonzeros Variable types: 0 continuous, 686 integer (686 binary) Root relaxation: objective 0.000000e+00, 247 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 (599 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% optimal solution found: number of colors: 4