current bounds on the number of colors: 0 -- 151 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:02 2012 Optimize a model with 9226 rows, 11446 columns and 38550 nonzeros Presolve removed 29 rows and 2175 columns Presolve time: 0.11s Presolved: 9197 rows, 9271 columns, 36375 nonzeros Variable types: 0 continuous, 9271 integer (9271 binary) Root relaxation: objective 0.000000e+00, 224 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 (224 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 -- 75 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:02 2012 Optimize a model with 4628 rows, 5708 columns and 19018 nonzeros Presolve removed 29 rows and 1073 columns Presolve time: 0.04s Presolved: 4599 rows, 4635 columns, 17945 nonzeros Variable types: 0 continuous, 4635 integer (4635 binary) Root relaxation: objective 0.000000e+00, 221 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 (221 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 -- 37 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:02 2012 Optimize a model with 2329 rows, 2839 columns and 9252 nonzeros Presolve removed 29 rows and 522 columns Presolve time: 0.01s Presolved: 2300 rows, 2317 columns, 8730 nonzeros Variable types: 0 continuous, 2317 integer (2317 binary) Root relaxation: objective 0.000000e+00, 230 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 (342 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 16:20:02 2012 Optimize a model with 1240 rows, 1480 columns and 4626 nonzeros Presolve removed 29 rows and 261 columns Presolve time: 0.01s Presolved: 1211 rows, 1219 columns, 4365 nonzeros Variable types: 0 continuous, 1219 integer (1219 binary) Root relaxation: objective 0.000000e+00, 207 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 (207 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 16:20:02 2012 Optimize a model with 635 rows, 725 columns and 2056 nonzeros Presolve removed 29 rows and 116 columns Presolve time: 0.00s Presolved: 606 rows, 609 columns, 1940 nonzeros Variable types: 0 continuous, 609 integer (609 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 (187 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 16:20:02 2012 Optimize a model with 393 rows, 423 columns and 1028 nonzeros Presolve removed 161 rows and 195 columns Presolve time: 0.00s Presolved: 232 rows, 228 columns, 696 nonzeros Variable types: 0 continuous, 228 integer (228 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 93 - 0.00000 - - 0s Explored 0 nodes (374 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 16:20:02 2012 Optimize a model with 514 rows, 574 columns and 1542 nonzeros Presolve removed 29 rows and 87 columns Presolve time: 0.00s Presolved: 485 rows, 487 columns, 1455 nonzeros Variable types: 0 continuous, 487 integer (487 binary) Root relaxation: objective 0.000000e+00, 199 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 (199 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