current bounds on the number of colors: 0 -- 71 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:48 2012 Optimize a model with 4726 rows, 2618 columns and 16450 nonzeros Presolve removed 2 rows and 70 columns Presolve time: 0.03s Presolved: 4724 rows, 2548 columns, 16380 nonzeros Variable types: 0 continuous, 2548 integer (2548 binary) Root relaxation: objective 0.000000e+00, 148 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 (148 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 18:20:48 2012 Optimize a model with 2332 rows, 1340 columns and 7990 nonzeros Presolve removed 2 rows and 34 columns Presolve time: 0.01s Presolved: 2330 rows, 1306 columns, 7956 nonzeros Variable types: 0 continuous, 1306 integer (1306 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (145 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 18:20:48 2012 Optimize a model with 1135 rows, 701 columns and 3760 nonzeros Presolve removed 2 rows and 16 columns Presolve time: 0.00s Presolved: 1133 rows, 685 columns, 3744 nonzeros Variable types: 0 continuous, 685 integer (685 binary) Root relaxation: objective 0.000000e+00, 134 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 (134 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 18:20:48 2012 Optimize a model with 603 rows, 417 columns and 1880 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 601 rows, 409 columns, 1872 nonzeros Variable types: 0 continuous, 409 integer (409 binary) Root relaxation: objective 0.000000e+00, 165 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 (257 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 18:20:48 2012 Optimize a model with 337 rows, 275 columns and 940 nonzeros Presolve removed 71 rows and 73 columns Presolve time: 0.00s Presolved: 266 rows, 202 columns, 798 nonzeros Variable types: 0 continuous, 202 integer (202 binary) Root relaxation: objective 0.000000e+00, 73 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 69 - 0.00000 - - 0s Explored 0 nodes (258 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 18:20:48 2012 Optimize a model with 470 rows, 346 columns and 1410 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 468 rows, 340 columns, 1404 nonzeros Variable types: 0 continuous, 340 integer (340 binary) Root relaxation: objective 0.000000e+00, 183 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 (326 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