current bounds on the number of colors: 0 -- 178 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:52:57 2012 Optimize a model with 73425 rows, 16665 columns and 235583 nonzeros Presolve time: 0.23s Presolved: 73425 rows, 16665 columns, 235583 nonzeros Variable types: 0 continuous, 16665 integer (16665 binary) Root relaxation: objective 0.000000e+00, 722 iterations, 0.08 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 (1134 simplex iterations) in 0.42 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 -- 89 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:52:58 2012 Optimize a model with 36390 rows, 8655 columns and 116468 nonzeros Presolve time: 0.15s Presolved: 36390 rows, 8655 columns, 116468 nonzeros Variable types: 0 continuous, 8655 integer (8655 binary) Root relaxation: objective 0.000000e+00, 555 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 (968 simplex iterations) in 0.24 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 -- 44 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:52:59 2012 Optimize a model with 18284 rows, 4739 columns and 58234 nonzeros Presolve time: 0.07s Presolved: 18284 rows, 4739 columns, 58234 nonzeros Variable types: 0 continuous, 4739 integer (4739 binary) Root relaxation: objective 0.000000e+00, 400 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 (736 simplex iterations) in 0.11 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:52:59 2012 Optimize a model with 9231 rows, 2781 columns and 29117 nonzeros Presolve time: 0.03s Presolved: 9231 rows, 2781 columns, 29117 nonzeros Variable types: 0 continuous, 2781 integer (2781 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (692 simplex iterations) in 0.05 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:52:59 2012 Optimize a model with 4293 rows, 1713 columns and 13235 nonzeros Presolve time: 0.01s Presolved: 4293 rows, 1713 columns, 13235 nonzeros Variable types: 0 continuous, 1713 integer (1713 binary) Root relaxation: objective 0.000000e+00, 396 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 0 114 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3785 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:53:00 2012 Optimize a model with 1824 rows, 1179 columns and 5294 nonzeros Presolve removed 178 rows and 178 columns Presolve time: 0.00s Presolved: 1646 rows, 1001 columns, 4938 nonzeros Variable types: 0 continuous, 1001 integer (1001 binary) Root relaxation: objective 0.000000e+00, 182 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 0 178 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (751 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 23:53:00 2012 Optimize a model with 2647 rows, 1357 columns and 7941 nonzeros Presolve time: 0.01s Presolved: 2647 rows, 1357 columns, 7941 nonzeros Variable types: 0 continuous, 1357 integer (1357 binary) Root relaxation: objective 0.000000e+00, 404 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 0 296 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5981 simplex iterations) in 0.59 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 23:53:00 2012 Optimize a model with 3470 rows, 1535 columns and 10588 nonzeros Presolve time: 0.01s Presolved: 3470 rows, 1535 columns, 10588 nonzeros Variable types: 0 continuous, 1535 integer (1535 binary) Root relaxation: objective 0.000000e+00, 431 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 0 350 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 0s 0 0 0.00000 0 342 - 0.00000 - - 0s 0 0 0.00000 0 443 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 1s 0 0 0.00000 0 328 - 0.00000 - - 1s 0 0 0.00000 0 320 - 0.00000 - - 2s 0 0 0.00000 0 320 - 0.00000 - - 2s 0 0 0.00000 0 320 - 0.00000 - - 2s 0 0 0.00000 0 320 - 0.00000 - - 3s 0 0 0.00000 0 320 - 0.00000 - - 3s 0 2 0.00000 0 320 - 0.00000 - - 3s 140 33 infeasible 16 - 0.00000 - 148 5s 608 76 0.00000 15 447 - 0.00000 - 135 10s 613 79 0.00000 12 278 - 0.00000 - 134 16s 616 81 0.00000 10 268 - 0.00000 - 133 20s 621 85 0.00000 19 366 - 0.00000 - 132 25s 735 77 0.00000 20 384 - 0.00000 - 224 30s 1047 51 infeasible 25 - 0.00000 - 220 35s 1366 38 0.00000 19 342 - 0.00000 - 222 40s 1635 35 infeasible 26 - 0.00000 - 225 45s 1918 10 infeasible 25 - 0.00000 - 228 50s Cutting planes: Gomory: 4 Zero half: 18 Explored 2089 nodes (511599 simplex iterations) in 52.96 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