current bounds on the number of colors: 0 -- 70 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:45 2012 Optimize a model with 4095 rows, 2565 columns and 14525 nonzeros Presolve removed 2 rows and 70 columns Presolve time: 0.03s Presolved: 4093 rows, 2495 columns, 14455 nonzeros Variable types: 0 continuous, 2495 integer (2495 binary) Root relaxation: objective 0.000000e+00, 142 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 (142 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:45 2012 Optimize a model with 2025 rows, 1305 columns and 7055 nonzeros Presolve removed 2 rows and 34 columns Presolve time: 0.01s Presolved: 2023 rows, 1271 columns, 7021 nonzeros Variable types: 0 continuous, 1271 integer (1271 binary) Root relaxation: objective 0.000000e+00, 151 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 (151 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:45 2012 Optimize a model with 990 rows, 675 columns and 3320 nonzeros Presolve removed 2 rows and 16 columns Presolve time: 0.00s Presolved: 988 rows, 659 columns, 3304 nonzeros Variable types: 0 continuous, 659 integer (659 binary) Root relaxation: objective 0.000000e+00, 149 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 (231 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:45 2012 Optimize a model with 530 rows, 395 columns and 1660 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 528 rows, 387 columns, 1652 nonzeros Variable types: 0 continuous, 387 integer (387 binary) Root relaxation: objective 0.000000e+00, 144 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 (222 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 18:20:45 2012 Optimize a model with 300 rows, 255 columns and 830 nonzeros Presolve removed 70 rows and 72 columns Presolve time: 0.00s Presolved: 230 rows, 183 columns, 690 nonzeros Variable types: 0 continuous, 183 integer (183 binary) Root relaxation: objective 0.000000e+00, 80 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 68 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (277 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 18:20:45 2012 Optimize a model with 415 rows, 325 columns and 1245 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 413 rows, 319 columns, 1239 nonzeros Variable types: 0 continuous, 319 integer (319 binary) Root relaxation: objective 0.000000e+00, 145 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 98 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (397 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