Submitter | Variables | Constraints | Density | Status | Group | Objective | MPS File |
---|---|---|---|---|---|---|---|

Daniel Espinoza | 162547 | 1441651 | 1.49993e-05 | open | rmine | -10618.75083837232* | rmine21.mps.gz |

Instance coming from open pit mining over a cube considering multiple time periods and two knapsack constraints per period

Imported from MIPLIB2010.

Detailed explanation of the following tables can be found here.

Original | Presolved | |
---|---|---|

Variables | 162547 | 162547 |

Constraints | 1441651 | 1441651 |

Binaries | 162547 | 162547 |

Integers | 0 | 0 |

Continuous | 0 | 0 |

Implicit Integers | 0 | 0 |

Fixed Variables | 0 | 0 |

Nonzero Density | 1.49993e-05 | 1.49993e-05 |

Nonzeroes | 3514880 | 3514880 |

Original | Presolved | |
---|---|---|

Total | 1441651 | 1441651 |

Empty | 0 | 0 |

Free | 0 | 0 |

Singleton | 0 | 0 |

Aggregations | 0 | 0 |

Precedence | 1441609 | 1441609 |

Variable Bound | 0 | 0 |

Set Partitioning | 0 | 0 |

Set Packing | 0 | 0 |

Set Covering | 0 | 0 |

Cardinality | 0 | 0 |

Invariant Knapsack | 0 | 0 |

Equation Knapsack | 0 | 0 |

Bin Packing | 0 | 0 |

Knapsack | 0 | 0 |

Integer Knapsack | 0 | 0 |

Mixed Binary | 42 | 42 |

General Linear | 0 | 0 |

Indicator | 0 | 0 |

Available nonzero structure and decomposition information. Further information can be found here.

Decomposed structure of original problem (dec-file)

Decomposed structure after trivial presolving (dec-file)

value | min | median | mean | max | |
---|---|---|---|---|---|

Components | |||||

Constraint % | |||||

Variable % | |||||

Score |

Find solutions below. Download the archive containing all solutions from the Download page.

ID | Objective | Exact | Int. Viol | Cons. Viol | Obj. Viol | Submitter | Date | Description |
---|---|---|---|---|---|---|---|---|

6 | -10618.751 | -10618.751 | 6.6e-06 | 0 | 0 | Edward Rothberg | 2021-06-15 | |

5 | -10617.615 | -10617.615 | 0.0e+00 | 0 | 0 | Edward Rothberg | 2020-05-15 | Obtained with Gurobi 9.0 using the solution improvement heuristic |

4 | -10615.320 | -10615.320 | 0.0e+00 | 0 | 0 | Edward Rothberg | 2020-03-03 | Obtained with Gurobi 9.0 using the solution improvement heuristic |

3 | -10594.618 | 0.0e+00 | 0 | 0 | Edward Rothberg | 2019-12-13 | Obtained with Gurobi 9.0 | |

2 | -10500.369 | 0.0e+00 | 0 | 0 | Robert Ashford and Alkis Vazacopoulus | 2019-12-18 | Found using ODH|CPlex | |

1 | -2645.005 | -2645.005 | 0.0e+00 | 0 | 0 | - | 2018-10-10 | Solution found during MIPLIB2017 problem selection. |

The following instances are most similar to rmine21 in the collection. This similarity analysis is based on 100 scaled instance features describing properties of the variables, objective function, bounds, constraints, and right hand sides.

Instance | Status | Variables | Binaries | Integers | Continuous | Constraints | Nonz. | Submitter | Group | Objective | Tags |
---|---|---|---|---|---|---|---|---|---|---|---|

rmine25 | open | 326599 | 326599 | 0 | 0 | 2953849 | 7182744 | Daniel Espinoza | rmine | -15541.66928749976* | binary precedence mixed_binary |

rmine15 | open | 42438 | 42438 | 0 | 0 | 358395 | 879732 | Daniel Espinoza | rmine | -5018.819990999996* | binary precedence mixed_binary |

rmine13 | open | 23980 | 23980 | 0 | 0 | 197155 | 485784 | Daniel Espinoza | rmine | -3495.3706624382535* | binary precedence mixed_binary |

opm2-z12-s8 | hard | 10800 | 10800 | 0 | 0 | 319508 | 725377 | Daniel Espinoza | opm2 | -58540 | binary precedence knapsack |

rmine11 | open | 12292 | 12292 | 0 | 0 | 97389 | 241240 | Daniel Espinoza | rmine | -2508.404144* | binary precedence mixed_binary |

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Last Update Aug 03, 2023 by Jan Krüger

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