current bounds on the number of colors: 0 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:36 2012 Optimize a model with 913 rows, 787 columns and 3363 nonzeros Presolve removed 3 rows and 57 columns Presolve time: 0.00s Presolved: 910 rows, 730 columns, 3306 nonzeros Variable types: 0 continuous, 730 integer (730 binary) Root relaxation: objective 0.000000e+00, 66 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 (66 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:36 2012 Optimize a model with 453 rows, 397 columns and 1593 nonzeros Presolve removed 3 rows and 27 columns Presolve time: 0.00s Presolved: 450 rows, 370 columns, 1566 nonzeros Variable types: 0 continuous, 370 integer (370 binary) Root relaxation: objective 0.000000e+00, 60 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 (60 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:36 2012 Optimize a model with 223 rows, 202 columns and 708 nonzeros Presolve removed 3 rows and 12 columns Presolve time: 0.00s Presolved: 220 rows, 190 columns, 696 nonzeros Variable types: 0 continuous, 190 integer (190 binary) Root relaxation: objective 0.000000e+00, 73 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 (109 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:36 2012 Optimize a model with 131 rows, 124 columns and 354 nonzeros Presolve removed 41 rows and 45 columns Presolve time: 0.00s Presolved: 90 rows, 79 columns, 270 nonzeros Variable types: 0 continuous, 79 integer (79 binary) Root relaxation: objective 0.000000e+00, 38 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 34 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (119 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:36 2012 Optimize a model with 177 rows, 163 columns and 531 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 174 rows, 154 columns, 522 nonzeros Variable types: 0 continuous, 154 integer (154 binary) Root relaxation: objective 0.000000e+00, 74 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% optimal solution found: number of colors: 3