current bounds on the number of colors: 0 -- 89 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:41 2012 Optimize a model with 8185 rows, 4100 columns and 28204 nonzeros Presolve removed 3 rows and 132 columns Presolve time: 0.05s Presolved: 8182 rows, 3968 columns, 28072 nonzeros Variable types: 0 continuous, 3968 integer (3968 binary) Root relaxation: objective 0.000000e+00, 205 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 (205 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 -- 44 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:41 2012 Optimize a model with 4137 rows, 2142 columns and 14102 nonzeros Presolve removed 3 rows and 66 columns Presolve time: 0.02s Presolved: 4134 rows, 2076 columns, 14036 nonzeros Variable types: 0 continuous, 2076 integer (2076 binary) Root relaxation: objective 0.000000e+00, 202 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 (328 simplex iterations) in 0.03 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:41 2012 Optimize a model with 2113 rows, 1163 columns and 7051 nonzeros Presolve removed 3 rows and 33 columns Presolve time: 0.01s Presolved: 2110 rows, 1130 columns, 7018 nonzeros Variable types: 0 continuous, 1130 integer (1130 binary) Root relaxation: objective 0.000000e+00, 201 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 (304 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:41 2012 Optimize a model with 1009 rows, 629 columns and 3205 nonzeros Presolve removed 3 rows and 15 columns Presolve time: 0.00s Presolved: 1006 rows, 614 columns, 3190 nonzeros Variable types: 0 continuous, 614 integer (614 binary) Root relaxation: objective 0.000000e+00, 207 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 (342 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:41 2012 Optimize a model with 457 rows, 362 columns and 1282 nonzeros Presolve removed 89 rows and 92 columns Presolve time: 0.00s Presolved: 368 rows, 270 columns, 1104 nonzeros Variable types: 0 continuous, 270 integer (270 binary) Root relaxation: objective 0.000000e+00, 96 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 86 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (353 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 - current bounds on the number of colors: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:41 2012 Optimize a model with 641 rows, 451 columns and 1923 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 638 rows, 442 columns, 1914 nonzeros Variable types: 0 continuous, 442 integer (442 binary) Root relaxation: objective 0.000000e+00, 188 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 0 146 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (672 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: 3