current bounds on the number of colors: 0 -- 173 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:53:24 2012 Optimize a model with 67425 rows, 15660 columns and 216634 nonzeros Presolve time: 0.21s Presolved: 67425 rows, 15660 columns, 216634 nonzeros Variable types: 0 continuous, 15660 integer (15660 binary) Root relaxation: objective 0.000000e+00, 776 iterations, 0.09 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 (1192 simplex iterations) in 0.39 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 -- 86 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:53:26 2012 Optimize a model with 33799 rows, 8221 columns and 108317 nonzeros Presolve time: 0.15s Presolved: 33799 rows, 8221 columns, 108317 nonzeros Variable types: 0 continuous, 8221 integer (8221 binary) Root relaxation: objective 0.000000e+00, 542 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 (911 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 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:53:26 2012 Optimize a model with 16595 rows, 4415 columns and 52899 nonzeros Presolve time: 0.06s Presolved: 16595 rows, 4415 columns, 52899 nonzeros Variable types: 0 continuous, 4415 integer (4415 binary) Root relaxation: objective 0.000000e+00, 421 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 (772 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 21:53:27 2012 Optimize a model with 7993 rows, 2512 columns and 25190 nonzeros Presolve time: 0.02s Presolved: 7993 rows, 2512 columns, 25190 nonzeros Variable types: 0 continuous, 2512 integer (2512 binary) Root relaxation: objective 0.000000e+00, 361 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 (705 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 21:53:27 2012 Optimize a model with 4083 rows, 1647 columns and 12595 nonzeros Presolve time: 0.01s Presolved: 4083 rows, 1647 columns, 12595 nonzeros Variable types: 0 continuous, 1647 integer (1647 binary) Root relaxation: objective 0.000000e+00, 394 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 (2937 simplex iterations) in 0.15 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 21:53:27 2012 Optimize a model with 1737 rows, 1128 columns and 5038 nonzeros Presolve removed 173 rows and 173 columns Presolve time: 0.00s Presolved: 1564 rows, 955 columns, 4692 nonzeros Variable types: 0 continuous, 955 integer (955 binary) Root relaxation: objective 0.000000e+00, 177 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 0 173 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (731 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 21:53:27 2012 Optimize a model with 2519 rows, 1301 columns and 7557 nonzeros Presolve time: 0.01s Presolved: 2519 rows, 1301 columns, 7557 nonzeros Variable types: 0 continuous, 1301 integer (1301 binary) Root relaxation: objective 0.000000e+00, 379 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 0 346 - 0.00000 - - 0s 0 0 0.00000 0 342 - 0.00000 - - 0s 0 0 0.00000 0 458 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 33 Clique: 1 Zero half: 909 Explored 0 nodes (6970 simplex iterations) in 0.90 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 21:53:28 2012 Optimize a model with 3301 rows, 1474 columns and 10076 nonzeros Presolve time: 0.01s Presolved: 3301 rows, 1474 columns, 10076 nonzeros Variable types: 0 continuous, 1474 integer (1474 binary) Root relaxation: objective 0.000000e+00, 407 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 0 326 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 294 - 0.00000 - - 1s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 0 0.00000 0 280 - 0.00000 - - 2s 0 0 0.00000 0 290 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 3s 0 0 0.00000 0 276 - 0.00000 - - 3s 0 0 0.00000 0 272 - 0.00000 - - 3s 0 0 0.00000 0 260 - 0.00000 - - 4s 0 0 0.00000 0 267 - 0.00000 - - 4s 0 0 0.00000 0 381 - 0.00000 - - 5s 0 0 0.00000 0 397 - 0.00000 - - 5s 0 0 0.00000 0 394 - 0.00000 - - 5s 0 2 0.00000 0 394 - 0.00000 - - 6s 703 73 0.00000 19 322 - 0.00000 - 88.4 10s 708 77 0.00000 13 390 - 0.00000 - 87.8 15s 715 81 infeasible 14 - 0.00000 - 143 20s 930 35 infeasible 30 - 0.00000 - 155 25s 1374 34 infeasible 24 - 0.00000 - 164 30s 1810 24 0.00000 19 298 - 0.00000 - 171 35s 2189 27 0.00000 22 375 - 0.00000 - 177 40s 2542 24 infeasible 28 - 0.00000 - 182 45s 2895 17 0.00000 23 298 - 0.00000 - 186 50s 3309 21 0.00000 33 341 - 0.00000 - 188 55s 3765 23 infeasible 26 - 0.00000 - 188 60s 4124 8 infeasible 24 - 0.00000 - 192 65s Cutting planes: Zero half: 9 Explored 4467 nodes (914579 simplex iterations) in 69.30 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