current bounds on the number of colors: 0 -- 154 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:44 2012 Optimize a model with 48587 rows, 12487 columns and 157157 nonzeros Presolve time: 0.17s Presolved: 48587 rows, 12487 columns, 157157 nonzeros Variable types: 0 continuous, 12487 integer (12487 binary) Root relaxation: objective 0.000000e+00, 490 iterations, 0.03 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 (807 simplex iterations) in 0.27 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 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:44 2012 Optimize a model with 24056 rows, 6481 columns and 77558 nonzeros Presolve time: 0.13s Presolved: 24056 rows, 6481 columns, 77558 nonzeros Variable types: 0 continuous, 6481 integer (6481 binary) Root relaxation: objective 0.000000e+00, 405 iterations, 0.01 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 (711 simplex iterations) in 0.17 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 Fri Dec 14 18:53:45 2012 Optimize a model with 12105 rows, 3555 columns and 38779 nonzeros Presolve time: 0.05s Presolved: 12105 rows, 3555 columns, 38779 nonzeros Variable types: 0 continuous, 3555 integer (3555 binary) Root relaxation: objective 0.000000e+00, 318 iterations, 0.01 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 (608 simplex iterations) in 0.07 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 Fri Dec 14 18:53:45 2012 Optimize a model with 5815 rows, 2015 columns and 18369 nonzeros Presolve time: 0.02s Presolved: 5815 rows, 2015 columns, 18369 nonzeros Variable types: 0 continuous, 2015 integer (2015 binary) Root relaxation: objective 0.000000e+00, 330 iterations, 0.01 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 (620 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:45 2012 Optimize a model with 2670 rows, 1245 columns and 8164 nonzeros Presolve time: 0.01s Presolved: 2670 rows, 1245 columns, 8164 nonzeros Variable types: 0 continuous, 1245 integer (1245 binary) Root relaxation: objective 0.000000e+00, 362 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 1s 0 0 0.00000 0 250 - 0.00000 - - 1s 0 0 0.00000 0 250 - 0.00000 - - 1s 0 0 0.00000 0 244 - 0.00000 - - 1s 0 0 0.00000 0 232 - 0.00000 - - 1s 0 0 0.00000 0 230 - 0.00000 - - 1s 0 0 0.00000 0 230 - 0.00000 - - 2s 0 0 0.00000 0 222 - 0.00000 - - 2s 0 0 0.00000 0 222 - 0.00000 - - 2s 0 0 0.00000 0 222 - 0.00000 - - 2s 0 2 0.00000 0 222 - 0.00000 - - 2s * 139 2 25 0.0000000 0.00000 0.0% 86.9 3s Cutting planes: Zero half: 19 Explored 140 nodes (41988 simplex iterations) in 3.18 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 18:53:48 2012 Optimize a model with 1412 rows, 937 columns and 4082 nonzeros Presolve removed 154 rows and 154 columns Presolve time: 0.00s Presolved: 1258 rows, 783 columns, 3774 nonzeros Variable types: 0 continuous, 783 integer (783 binary) Root relaxation: objective 0.000000e+00, 163 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 0 154 - 0.00000 - - 0s Explored 0 nodes (640 simplex iterations) in 0.01 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 18:53:49 2012 Optimize a model with 2041 rows, 1091 columns and 6123 nonzeros Presolve time: 0.01s Presolved: 2041 rows, 1091 columns, 6123 nonzeros Variable types: 0 continuous, 1091 integer (1091 binary) Root relaxation: objective 0.000000e+00, 381 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 410 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 15 Zero half: 401 Explored 0 nodes (6069 simplex iterations) in 0.63 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4