current bounds on the number of colors: 0 -- 91 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:55 2012 Optimize a model with 8821 rows, 4289 columns and 30285 nonzeros Presolve removed 1 rows and 45 columns Presolve time: 0.06s Presolved: 8820 rows, 4244 columns, 30240 nonzeros Variable types: 0 continuous, 4244 integer (4244 binary) Root relaxation: objective 0.000000e+00, 201 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 (201 simplex iterations) in 0.07 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 -- 45 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:55 2012 Optimize a model with 4359 rows, 2196 columns and 14806 nonzeros Presolve removed 1 rows and 22 columns Presolve time: 0.02s Presolved: 4358 rows, 2174 columns, 14784 nonzeros Variable types: 0 continuous, 2174 integer (2174 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 0.02 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:55 2012 Optimize a model with 2225 rows, 1195 columns and 7403 nonzeros Presolve removed 1 rows and 11 columns Presolve time: 0.01s Presolved: 2224 rows, 1184 columns, 7392 nonzeros Variable types: 0 continuous, 1184 integer (1184 binary) Root relaxation: objective 0.000000e+00, 198 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 (327 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 18:22:55 2012 Optimize a model with 1061 rows, 649 columns and 3365 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1060 rows, 644 columns, 3360 nonzeros Variable types: 0 continuous, 644 integer (644 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 (339 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 18:22:55 2012 Optimize a model with 479 rows, 376 columns and 1346 nonzeros Presolve removed 91 rows and 92 columns Presolve time: 0.00s Presolved: 388 rows, 284 columns, 1164 nonzeros Variable types: 0 continuous, 284 integer (284 binary) Root relaxation: objective 0.000000e+00, 98 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 90 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (360 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 18:22:55 2012 Optimize a model with 673 rows, 467 columns and 2019 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 672 rows, 464 columns, 2016 nonzeros Variable types: 0 continuous, 464 integer (464 binary) Root relaxation: objective 0.000000e+00, 218 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 0 127 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (812 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% optimal solution found: number of colors: 3