current bounds on the number of colors: 0 -- 153 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:24 2012 Optimize a model with 9121 rows, 11746 columns and 38532 nonzeros Presolve removed 28 rows and 2128 columns Presolve time: 0.11s Presolved: 9093 rows, 9618 columns, 36404 nonzeros Variable types: 0 continuous, 9618 integer (9618 binary) Root relaxation: objective 0.000000e+00, 214 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 (214 simplex iterations) in 0.12 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 -- 76 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:24 2012 Optimize a model with 4637 rows, 5932 columns and 19266 nonzeros Presolve removed 28 rows and 1064 columns Presolve time: 0.04s Presolved: 4609 rows, 4868 columns, 18202 nonzeros Variable types: 0 continuous, 4868 integer (4868 binary) Root relaxation: objective 0.000000e+00, 212 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 (212 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 -- 38 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:24 2012 Optimize a model with 2395 rows, 3025 columns and 9633 nonzeros Presolve removed 28 rows and 532 columns Presolve time: 0.01s Presolved: 2367 rows, 2493 columns, 9101 nonzeros Variable types: 0 continuous, 2493 integer (2493 binary) Root relaxation: objective 0.000000e+00, 213 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 (213 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 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:24 2012 Optimize a model with 1215 rows, 1495 columns and 4563 nonzeros Presolve removed 28 rows and 252 columns Presolve time: 0.01s Presolved: 1187 rows, 1243 columns, 4311 nonzeros Variable types: 0 continuous, 1243 integer (1243 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 (290 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 16:20:24 2012 Optimize a model with 625 rows, 730 columns and 2028 nonzeros Presolve removed 28 rows and 112 columns Presolve time: 0.00s Presolved: 597 rows, 618 columns, 1916 nonzeros Variable types: 0 continuous, 618 integer (618 binary) Root relaxation: objective 0.000000e+00, 186 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 (186 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 16:20:24 2012 Optimize a model with 389 rows, 424 columns and 1014 nonzeros Presolve removed 167 rows and 202 columns Presolve time: 0.00s Presolved: 222 rows, 222 columns, 666 nonzeros Variable types: 0 continuous, 222 integer (222 binary) Root relaxation: objective 0.000000e+00, 121 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 90 - 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 16:20:24 2012 Optimize a model with 507 rows, 577 columns and 1521 nonzeros Presolve removed 28 rows and 84 columns Presolve time: 0.00s Presolved: 479 rows, 493 columns, 1437 nonzeros Variable types: 0 continuous, 493 integer (493 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% optimal solution found: number of colors: 3