current bounds on the number of colors: 0 -- 130 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:46 2012 Optimize a model with 27625 rows, 8873 columns and 90935 nonzeros Presolve time: 0.13s Presolved: 27625 rows, 8873 columns, 90935 nonzeros Variable types: 0 continuous, 8873 integer (8873 binary) Root relaxation: objective 0.000000e+00, 378 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 (597 simplex iterations) in 0.19 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 -- 65 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:46 2012 Optimize a model with 13666 rows, 4583 columns and 44768 nonzeros Presolve time: 0.07s Presolved: 13666 rows, 4583 columns, 44768 nonzeros Variable types: 0 continuous, 4583 integer (4583 binary) Root relaxation: objective 0.000000e+00, 341 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 (591 simplex iterations) in 0.10 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:47 2012 Optimize a model with 6898 rows, 2503 columns and 22384 nonzeros Presolve time: 0.02s Presolved: 6898 rows, 2503 columns, 22384 nonzeros Variable types: 0 continuous, 2503 integer (2503 binary) Root relaxation: objective 0.000000e+00, 271 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 (478 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:47 2012 Optimize a model with 3514 rows, 1463 columns and 11192 nonzeros Presolve time: 0.01s Presolved: 3514 rows, 1463 columns, 11192 nonzeros Variable types: 0 continuous, 1463 integer (1463 binary) Root relaxation: objective 0.000000e+00, 287 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 (517 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:47 2012 Optimize a model with 1822 rows, 943 columns and 5596 nonzeros Presolve time: 0.00s Presolved: 1822 rows, 943 columns, 5596 nonzeros Variable types: 0 continuous, 943 integer (943 binary) Root relaxation: objective 0.000000e+00, 302 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 0 182 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1522 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:47 2012 Optimize a model with 976 rows, 683 columns and 2798 nonzeros Presolve removed 130 rows and 130 columns Presolve time: 0.00s Presolved: 846 rows, 553 columns, 2538 nonzeros Variable types: 0 continuous, 553 integer (553 binary) Root relaxation: objective 0.000000e+00, 138 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 0 130 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (528 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 18:34:47 2012 Optimize a model with 1399 rows, 813 columns and 4197 nonzeros Presolve time: 0.00s Presolved: 1399 rows, 813 columns, 4197 nonzeros Variable types: 0 continuous, 813 integer (813 binary) Root relaxation: objective 0.000000e+00, 306 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 0 244 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 0s 0 0 0.00000 0 269 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 0.00000 0 339 - 0.00000 - - 0s 0 0 0.00000 0 337 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 1s 0 0 0.00000 0 263 - 0.00000 - - 1s 0 0 0.00000 0 329 - 0.00000 - - 1s 0 0 0.00000 0 329 - 0.00000 - - 1s 0 2 0.00000 0 329 - 0.00000 - - 1s Cutting planes: Zero half: 21 Explored 3 nodes (17481 simplex iterations) in 1.59 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4