current bounds on the number of colors: 0 -- 150 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:53 2012 Optimize a model with 8625 rows, 11363 columns and 36675 nonzeros Presolve removed 35 rows and 2625 columns Presolve time: 0.10s Presolved: 8590 rows, 8738 columns, 34050 nonzeros Variable types: 0 continuous, 8738 integer (8738 binary) Root relaxation: objective 0.000000e+00, 200 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 (200 simplex iterations) in 0.11 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 -- 75 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:53 2012 Optimize a model with 4331 rows, 5663 columns and 18093 nonzeros Presolve removed 35 rows and 1295 columns Presolve time: 0.04s Presolved: 4296 rows, 4368 columns, 16798 nonzeros Variable types: 0 continuous, 4368 integer (4368 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 (201 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 -- 37 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:53 2012 Optimize a model with 2184 rows, 2813 columns and 8802 nonzeros Presolve removed 35 rows and 630 columns Presolve time: 0.01s Presolved: 2149 rows, 2183 columns, 8172 nonzeros Variable types: 0 continuous, 2183 integer (2183 binary) Root relaxation: objective 0.000000e+00, 203 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 (203 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:53 2012 Optimize a model with 1167 rows, 1463 columns and 4401 nonzeros Presolve removed 35 rows and 315 columns Presolve time: 0.00s Presolved: 1132 rows, 1148 columns, 4086 nonzeros Variable types: 0 continuous, 1148 integer (1148 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 0.01 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:53 2012 Optimize a model with 602 rows, 713 columns and 1956 nonzeros Presolve removed 35 rows and 140 columns Presolve time: 0.00s Presolved: 567 rows, 573 columns, 1816 nonzeros Variable types: 0 continuous, 573 integer (573 binary) Root relaxation: objective 0.000000e+00, 176 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 (176 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 Sat Dec 15 16:19:53 2012 Optimize a model with 376 rows, 413 columns and 978 nonzeros Presolve removed 164 rows and 206 columns Presolve time: 0.00s Presolved: 212 rows, 207 columns, 636 nonzeros Variable types: 0 continuous, 207 integer (207 binary) Root relaxation: objective 0.000000e+00, 113 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 83 - 0.00000 - - 0s Explored 0 nodes (328 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 Sat Dec 15 16:19:53 2012 Optimize a model with 489 rows, 563 columns and 1467 nonzeros Presolve removed 35 rows and 105 columns Presolve time: 0.00s Presolved: 454 rows, 458 columns, 1362 nonzeros Variable types: 0 continuous, 458 integer (458 binary) Root relaxation: objective 0.000000e+00, 192 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 (192 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