current bounds on the number of colors: 0 -- 169 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:44:59 2012 Optimize a model with 65605 rows, 14975 columns and 210504 nonzeros Presolve time: 0.20s Presolved: 65605 rows, 14975 columns, 210504 nonzeros Variable types: 0 continuous, 14975 integer (14975 binary) Root relaxation: objective 0.000000e+00, 676 iterations, 0.06 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 (1045 simplex iterations) in 0.36 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 -- 84 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:00 2012 Optimize a model with 32887 rows, 7877 columns and 105252 nonzeros Presolve time: 0.14s Presolved: 32887 rows, 7877 columns, 105252 nonzeros Variable types: 0 continuous, 7877 integer (7877 binary) Root relaxation: objective 0.000000e+00, 567 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 (959 simplex iterations) in 0.23 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:00 2012 Optimize a model with 16528 rows, 4328 columns and 52626 nonzeros Presolve time: 0.06s Presolved: 16528 rows, 4328 columns, 52626 nonzeros Variable types: 0 continuous, 4328 integer (4328 binary) Root relaxation: objective 0.000000e+00, 351 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 (671 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:01 2012 Optimize a model with 7959 rows, 2469 columns and 25060 nonzeros Presolve time: 0.02s Presolved: 7959 rows, 2469 columns, 25060 nonzeros Variable types: 0 continuous, 2469 integer (2469 binary) Root relaxation: objective 0.000000e+00, 367 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 (664 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:01 2012 Optimize a model with 4064 rows, 1624 columns and 12530 nonzeros Presolve time: 0.01s Presolved: 4064 rows, 1624 columns, 12530 nonzeros Variable types: 0 continuous, 1624 integer (1624 binary) Root relaxation: objective 0.000000e+00, 375 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 0 225 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3454 simplex iterations) in 0.22 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:01 2012 Optimize a model with 1727 rows, 1117 columns and 5012 nonzeros Presolve removed 169 rows and 169 columns Presolve time: 0.00s Presolved: 1558 rows, 948 columns, 4674 nonzeros Variable types: 0 continuous, 948 integer (948 binary) Root relaxation: objective 0.000000e+00, 174 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 0 169 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (724 simplex iterations) in 0.02 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:01 2012 Optimize a model with 2506 rows, 1286 columns and 7518 nonzeros Presolve time: 0.01s Presolved: 2506 rows, 1286 columns, 7518 nonzeros Variable types: 0 continuous, 1286 integer (1286 binary) Root relaxation: objective 0.000000e+00, 403 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 0 252 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5665 simplex iterations) in 0.55 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:02 2012 Optimize a model with 3285 rows, 1455 columns and 10024 nonzeros Presolve time: 0.01s Presolved: 3285 rows, 1455 columns, 10024 nonzeros Variable types: 0 continuous, 1455 integer (1455 binary) Root relaxation: objective 0.000000e+00, 382 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 0 314 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 435 - 0.00000 - - 0s 0 0 0.00000 0 406 - 0.00000 - - 1s 0 0 0.00000 0 398 - 0.00000 - - 2s 0 0 0.00000 0 397 - 0.00000 - - 2s 0 0 0.00000 0 395 - 0.00000 - - 3s 0 0 0.00000 0 403 - 0.00000 - - 3s 0 0 0.00000 0 401 - 0.00000 - - 3s 0 2 0.00000 0 401 - 0.00000 - - 4s 77 34 infeasible 18 - 0.00000 - 124 5s 606 74 0.00000 15 270 - 0.00000 - 89.9 10s 611 78 0.00000 19 349 - 0.00000 - 89.2 15s 614 80 0.00000 15 228 - 0.00000 - 88.7 20s 639 90 infeasible 20 - 0.00000 - 173 25s 915 24 infeasible 22 - 0.00000 - 194 30s 1213 30 infeasible 23 - 0.00000 - 203 35s 1552 23 0.00000 19 293 - 0.00000 - 207 40s 1860 5 0.00000 18 282 - 0.00000 - 213 45s Cutting planes: Zero half: 15 Explored 1880 nodes (427417 simplex iterations) in 45.32 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5