current bounds on the number of colors: 0 -- 150 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:04 2012 Optimize a model with 42225 rows, 11811 columns and 137475 nonzeros Presolve time: 0.15s Presolved: 42225 rows, 11811 columns, 137475 nonzeros Variable types: 0 continuous, 11811 integer (11811 binary) Root relaxation: objective 0.000000e+00, 522 iterations, 0.04 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 (816 simplex iterations) in 0.25 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 Fri Dec 14 18:48:04 2012 Optimize a model with 20907 rows, 6111 columns and 67821 nonzeros Presolve time: 0.11s Presolved: 20907 rows, 6111 columns, 67821 nonzeros Variable types: 0 continuous, 6111 integer (6111 binary) Root relaxation: objective 0.000000e+00, 439 iterations, 0.02 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 (762 simplex iterations) in 0.16 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 Fri Dec 14 18:48:05 2012 Optimize a model with 10248 rows, 3261 columns and 32994 nonzeros Presolve time: 0.04s Presolved: 10248 rows, 3261 columns, 32994 nonzeros Variable types: 0 continuous, 3261 integer (3261 binary) Root relaxation: objective 0.000000e+00, 320 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 (586 simplex iterations) in 0.06 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 Fri Dec 14 18:48:05 2012 Optimize a model with 5199 rows, 1911 columns and 16497 nonzeros Presolve time: 0.02s Presolved: 5199 rows, 1911 columns, 16497 nonzeros Variable types: 0 continuous, 1911 integer (1911 binary) Root relaxation: objective 0.000000e+00, 323 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 (603 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 18:48:05 2012 Optimize a model with 2394 rows, 1161 columns and 7332 nonzeros Presolve time: 0.01s Presolved: 2394 rows, 1161 columns, 7332 nonzeros Variable types: 0 continuous, 1161 integer (1161 binary) Root relaxation: objective 0.000000e+00, 338 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 0 284 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 205 - 0.00000 - - 0s 0 0 0.00000 0 211 - 0.00000 - - 1s 0 0 0.00000 0 269 - 0.00000 - - 1s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 2 0.00000 0 204 - 0.00000 - - 1s * 50 3 29 0.0000000 0.00000 0.0% 88.5 1s Cutting planes: Zero half: 3 Explored 51 nodes (24437 simplex iterations) in 1.80 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 18:48:07 2012 Optimize a model with 1272 rows, 861 columns and 3666 nonzeros Presolve removed 150 rows and 150 columns Presolve time: 0.00s Presolved: 1122 rows, 711 columns, 3366 nonzeros Variable types: 0 continuous, 711 integer (711 binary) Root relaxation: objective 0.000000e+00, 162 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 0 150 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (667 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 18:48:07 2012 Optimize a model with 1833 rows, 1011 columns and 5499 nonzeros Presolve time: 0.00s Presolved: 1833 rows, 1011 columns, 5499 nonzeros Variable types: 0 continuous, 1011 integer (1011 binary) Root relaxation: objective 0.000000e+00, 346 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 0 296 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 413 - 0.00000 - - 0s 0 0 0.00000 0 407 - 0.00000 - - 0s 0 0 0.00000 0 409 - 0.00000 - - 0s 0 0 0.00000 0 394 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Zero half: 349 Explored 0 nodes (7405 simplex iterations) in 1.01 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