current bounds on the number of colors: 0 -- 146 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:23 2012 Optimize a model with 8687 rows, 10775 columns and 36281 nonzeros Presolve removed 27 rows and 1971 columns Presolve time: 0.11s Presolved: 8660 rows, 8804 columns, 34310 nonzeros Variable types: 0 continuous, 8804 integer (8804 binary) Root relaxation: objective 0.000000e+00, 208 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 (208 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 -- 73 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:23 2012 Optimize a model with 4358 rows, 5373 columns and 17892 nonzeros Presolve removed 27 rows and 972 columns Presolve time: 0.03s Presolved: 4331 rows, 4401 columns, 16920 nonzeros Variable types: 0 continuous, 4401 integer (4401 binary) Root relaxation: objective 0.000000e+00, 209 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 (209 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:23 2012 Optimize a model with 2252 rows, 2745 columns and 8946 nonzeros Presolve removed 27 rows and 486 columns Presolve time: 0.01s Presolved: 2225 rows, 2259 columns, 8460 nonzeros Variable types: 0 continuous, 2259 integer (2259 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 0.02 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:23 2012 Optimize a model with 1199 rows, 1431 columns and 4473 nonzeros Presolve removed 27 rows and 243 columns Presolve time: 0.01s Presolved: 1172 rows, 1188 columns, 4230 nonzeros Variable types: 0 continuous, 1188 integer (1188 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:23 2012 Optimize a model with 614 rows, 701 columns and 1988 nonzeros Presolve removed 27 rows and 108 columns Presolve time: 0.00s Presolved: 587 rows, 593 columns, 1880 nonzeros Variable types: 0 continuous, 593 integer (593 binary) Root relaxation: objective 0.000000e+00, 193 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 (193 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 16:19:23 2012 Optimize a model with 380 rows, 409 columns and 994 nonzeros Presolve removed 154 rows and 185 columns Presolve time: 0.00s Presolved: 226 rows, 224 columns, 678 nonzeros Variable types: 0 continuous, 224 integer (224 binary) Root relaxation: objective 0.000000e+00, 119 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 85 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (340 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 16:19:23 2012 Optimize a model with 497 rows, 555 columns and 1491 nonzeros Presolve removed 27 rows and 81 columns Presolve time: 0.00s Presolved: 470 rows, 474 columns, 1410 nonzeros Variable types: 0 continuous, 474 integer (474 binary) Root relaxation: objective 0.000000e+00, 187 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 (255 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