current bounds on the number of colors: 0 -- 227 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:39:02 2012 Optimize a model with 31641 rows, 25929 columns and 119893 nonzeros Presolve removed 20 rows and 2260 columns Presolve time: 0.15s Presolved: 31621 rows, 23669 columns, 117633 nonzeros Variable types: 0 continuous, 23669 integer (23669 binary) Root relaxation: objective 0.000000e+00, 377 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 (377 simplex iterations) in 0.18 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 -- 113 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:39:03 2012 Optimize a model with 15795 rows, 12990 columns and 59416 nonzeros Presolve removed 20 rows and 1120 columns Presolve time: 0.12s Presolved: 15775 rows, 11870 columns, 58296 nonzeros Variable types: 0 continuous, 11870 integer (11870 binary) Root relaxation: objective 0.000000e+00, 377 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 (377 simplex iterations) in 0.13 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 16:39:03 2012 Optimize a model with 8011 rows, 6634 columns and 29708 nonzeros Presolve removed 20 rows and 560 columns Presolve time: 0.05s Presolved: 7991 rows, 6074 columns, 29148 nonzeros Variable types: 0 continuous, 6074 integer (6074 binary) Root relaxation: objective 0.000000e+00, 375 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 (375 simplex iterations) in 0.06 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 16:39:03 2012 Optimize a model with 4119 rows, 3456 columns and 14854 nonzeros Presolve removed 20 rows and 280 columns Presolve time: 0.02s Presolved: 4099 rows, 3176 columns, 14574 nonzeros Variable types: 0 continuous, 3176 integer (3176 binary) Root relaxation: objective 0.000000e+00, 384 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 (384 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 -- 14 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:39:03 2012 Optimize a model with 2173 rows, 1867 columns and 7427 nonzeros Presolve removed 20 rows and 140 columns Presolve time: 0.01s Presolved: 2153 rows, 1727 columns, 7287 nonzeros Variable types: 0 continuous, 1727 integer (1727 binary) Root relaxation: objective 0.000000e+00, 401 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 (581 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:39:03 2012 Optimize a model with 1061 rows, 959 columns and 3183 nonzeros Presolve removed 20 rows and 60 columns Presolve time: 0.00s Presolved: 1041 rows, 899 columns, 3123 nonzeros Variable types: 0 continuous, 899 integer (899 binary) Root relaxation: objective 0.000000e+00, 428 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 (642 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:39:03 2012 Optimize a model with 505 rows, 505 columns and 1061 nonzeros Presolve removed 505 rows and 505 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 16:39:03 2012 Optimize a model with 783 rows, 732 columns and 2122 nonzeros Presolve removed 227 rows and 247 columns Presolve time: 0.00s Presolved: 556 rows, 485 columns, 1668 nonzeros Variable types: 0 continuous, 485 integer (485 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 0 207 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (773 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 3