current bounds on the number of colors: 0 -- 112 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:58 2012 Optimize a model with 4200 rows, 6345 columns and 18536 nonzeros Presolve removed 29 rows and 1624 columns Presolve time: 0.05s Presolved: 4171 rows, 4721 columns, 16912 nonzeros Variable types: 0 continuous, 4721 integer (4721 binary) Root relaxation: objective 0.000000e+00, 147 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 (147 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 -- 56 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:58 2012 Optimize a model with 2156 rows, 3209 columns and 9268 nonzeros Presolve removed 29 rows and 812 columns Presolve time: 0.02s Presolved: 2127 rows, 2397 columns, 8456 nonzeros Variable types: 0 continuous, 2397 integer (2397 binary) Root relaxation: objective 0.000000e+00, 144 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 (144 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 -- 28 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:58 2012 Optimize a model with 1134 rows, 1641 columns and 4634 nonzeros Presolve removed 29 rows and 406 columns Presolve time: 0.01s Presolved: 1105 rows, 1235 columns, 4228 nonzeros Variable types: 0 continuous, 1235 integer (1235 binary) Root relaxation: objective 0.000000e+00, 148 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 (148 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 -- 14 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:58 2012 Optimize a model with 623 rows, 857 columns and 2317 nonzeros Presolve removed 29 rows and 203 columns Presolve time: 0.00s Presolved: 594 rows, 654 columns, 2114 nonzeros Variable types: 0 continuous, 654 integer (654 binary) Root relaxation: objective 0.000000e+00, 137 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 (137 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:58 2012 Optimize a model with 331 rows, 409 columns and 993 nonzeros Presolve removed 29 rows and 87 columns Presolve time: 0.00s Presolved: 302 rows, 322 columns, 906 nonzeros Variable types: 0 continuous, 322 integer (322 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 0.00 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 16:15:58 2012 Optimize a model with 185 rows, 185 columns and 331 nonzeros Presolve removed 185 rows and 185 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 16:15:58 2012 Optimize a model with 258 rows, 297 columns and 662 nonzeros Presolve removed 120 rows and 153 columns Presolve time: 0.00s Presolved: 138 rows, 144 columns, 414 nonzeros Variable types: 0 continuous, 144 integer (144 binary) Root relaxation: objective 0.000000e+00, 70 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 (70 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