current bounds on the number of colors: 0 -- 50 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:53 2012 Optimize a model with 1300 rows, 1300 columns and 5000 nonzeros Presolve removed 12 rows and 300 columns Presolve time: 0.01s Presolved: 1288 rows, 1000 columns, 4700 nonzeros Variable types: 0 continuous, 1000 integer (1000 binary) Root relaxation: objective 0.000000e+00, 71 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 (71 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 -- 25 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:53 2012 Optimize a model with 650 rows, 650 columns and 2400 nonzeros Presolve removed 12 rows and 144 columns Presolve time: 0.00s Presolved: 638 rows, 506 columns, 2256 nonzeros Variable types: 0 continuous, 506 integer (506 binary) Root relaxation: objective 0.000000e+00, 75 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 (75 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 -- 12 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:53 2012 Optimize a model with 350 rows, 350 columns and 1200 nonzeros Presolve removed 12 rows and 72 columns Presolve time: 0.00s Presolved: 338 rows, 278 columns, 1128 nonzeros Variable types: 0 continuous, 278 integer (278 binary) Root relaxation: objective 0.000000e+00, 76 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 (116 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:53 2012 Optimize a model with 200 rows, 200 columns and 600 nonzeros Presolve removed 12 rows and 36 columns Presolve time: 0.00s Presolved: 188 rows, 164 columns, 564 nonzeros Variable types: 0 continuous, 164 integer (164 binary) Root relaxation: objective 0.000000e+00, 78 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 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:53 2012 Optimize a model with 100 rows, 100 columns and 200 nonzeros Presolve removed 100 rows and 100 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 Fri Dec 14 18:19:53 2012 Optimize a model with 150 rows, 150 columns and 400 nonzeros Presolve removed 50 rows and 62 columns Presolve time: 0.00s Presolved: 100 rows, 88 columns, 300 nonzeros Variable types: 0 continuous, 88 integer (88 binary) Root relaxation: objective 0.000000e+00, 42 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 38 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (140 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 - optimal solution found: number of colors: 3