current bounds on the number of colors: 0 -- 106 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:32 2012 Optimize a model with 3286 rows, 5678 columns and 15158 nonzeros Presolve removed 31 rows and 1643 columns Presolve time: 0.04s Presolved: 3255 rows, 4035 columns, 13515 nonzeros Variable types: 0 continuous, 4035 integer (4035 binary) Root relaxation: objective 0.000000e+00, 125 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 (125 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 16:15:32 2012 Optimize a model with 1666 rows, 2816 columns and 7436 nonzeros Presolve removed 31 rows and 806 columns Presolve time: 0.01s Presolved: 1635 rows, 2010 columns, 6630 nonzeros Variable types: 0 continuous, 2010 integer (2010 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 16:15:32 2012 Optimize a model with 886 rows, 1438 columns and 3718 nonzeros Presolve removed 31 rows and 403 columns Presolve time: 0.00s Presolved: 855 rows, 1035 columns, 3315 nonzeros Variable types: 0 continuous, 1035 integer (1035 binary) Root relaxation: objective 0.000000e+00, 125 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 (125 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 16:15:32 2012 Optimize a model with 466 rows, 696 columns and 1716 nonzeros Presolve removed 31 rows and 186 columns Presolve time: 0.00s Presolved: 435 rows, 510 columns, 1530 nonzeros Variable types: 0 continuous, 510 integer (510 binary) Root relaxation: objective 0.000000e+00, 114 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 (114 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 16:15:32 2012 Optimize a model with 286 rows, 378 columns and 858 nonzeros Presolve removed 31 rows and 93 columns Presolve time: 0.00s Presolved: 255 rows, 285 columns, 765 nonzeros Variable types: 0 continuous, 285 integer (285 binary) Root relaxation: objective 0.000000e+00, 105 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 (105 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 16:15:32 2012 Optimize a model with 166 rows, 166 columns and 286 nonzeros Presolve removed 166 rows and 166 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 16:15:32 2012 Optimize a model with 226 rows, 272 columns and 572 nonzeros Presolve removed 120 rows and 158 columns Presolve time: 0.00s Presolved: 106 rows, 114 columns, 318 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Root relaxation: objective 0.000000e+00, 49 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 (49 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