From 29628052e106eba47077ee7c5d2314a3d986c555 Mon Sep 17 00:00:00 2001 From: Xiwei Pan <90967972+isPANN@users.noreply.github.com> Date: Tue, 17 Mar 2026 11:05:30 +0800 Subject: [PATCH] Revert "Fix #230: Add BiconnectivityAugmentation model (#640)" This reverts commit 43f37f821a381e85cb647715c5ca4f5622bf789e. --- docs/paper/reductions.typ | 47 --- problemreductions-cli/src/cli.rs | 51 --- problemreductions-cli/src/commands/create.rs | 311 +---------------- problemreductions-cli/src/problem_name.rs | 4 - src/example_db/fixtures/examples.json | 25 +- src/lib.rs | 7 +- .../graph/biconnectivity_augmentation.rs | 315 ------------------ src/models/graph/mod.rs | 4 - src/models/mod.rs | 6 +- .../graph/biconnectivity_augmentation.rs | 145 -------- src/unit_tests/trait_consistency.rs | 157 --------- tests/suites/integration.rs | 13 - 12 files changed, 33 insertions(+), 1052 deletions(-) delete mode 100644 src/models/graph/biconnectivity_augmentation.rs delete mode 100644 src/unit_tests/models/graph/biconnectivity_augmentation.rs delete mode 100644 src/unit_tests/trait_consistency.rs diff --git a/docs/paper/reductions.typ b/docs/paper/reductions.typ index 7eb5af767..01372f7cb 100644 --- a/docs/paper/reductions.typ +++ b/docs/paper/reductions.typ @@ -66,7 +66,6 @@ "MinimumVertexCover": [Minimum Vertex Cover], "MaxCut": [Max-Cut], "GraphPartitioning": [Graph Partitioning], - "BiconnectivityAugmentation": [Biconnectivity Augmentation], "HamiltonianPath": [Hamiltonian Path], "UndirectedTwoCommodityIntegralFlow": [Undirected Two-Commodity Integral Flow], "LengthBoundedDisjointPaths": [Length-Bounded Disjoint Paths], @@ -538,52 +537,6 @@ Graph Partitioning is a core NP-hard problem arising in VLSI design, parallel co caption: [Graph with $n = 6$ vertices partitioned into $A = {v_0, v_1, v_2}$ (blue) and $B = {v_3, v_4, v_5}$ (red). The 3 crossing edges $(v_1, v_3)$, $(v_2, v_3)$, $(v_2, v_4)$ are shown in bold red; internal edges are gray.], ) ] -#problem-def("BiconnectivityAugmentation")[ - Given an undirected graph $G = (V, E)$, a set $F$ of candidate edges on $V$ with $F inter E = emptyset$, weights $w: F -> RR$, and a budget $B in RR$, find $F' subset.eq F$ such that $sum_(e in F') w(e) <= B$ and the augmented graph $G' = (V, E union F')$ is biconnected, meaning $G'$ is connected and deleting any single vertex leaves it connected. -][ -Biconnectivity augmentation is a classical network-design problem: add backup links so the graph survives any single vertex failure. The weighted candidate-edge formulation modeled here captures communication, transportation, and infrastructure planning settings where only a prescribed set of new links is feasible and each carries a cost. In this library, the exact baseline is brute-force enumeration over the $m = |F|$ candidate edges, yielding $O^*(2^m)$ time and matching the exported complexity metadata for the model. - -*Example.* Consider the path graph $v_0 - v_1 - v_2 - v_3 - v_4 - v_5$ with candidate edges $(v_0, v_2)$, $(v_0, v_3)$, $(v_0, v_4)$, $(v_1, v_3)$, $(v_1, v_4)$, $(v_1, v_5)$, $(v_2, v_4)$, $(v_2, v_5)$, $(v_3, v_5)$ carrying weights $(1, 2, 3, 1, 2, 3, 1, 2, 1)$ and budget $B = 4$. Selecting $F' = {(v_0, v_2), (v_1, v_3), (v_2, v_4), (v_3, v_5)}$ uses total weight $1 + 1 + 1 + 1 = 4$ and eliminates every articulation point: after deleting any single vertex, the remaining graph is still connected. Reducing the budget to $B = 3$ makes the instance infeasible, because one of the path endpoints remains attached through a single articulation vertex. - -#figure( - canvas(length: 1cm, { - import draw: * - // 6 vertices in a horizontal line - let verts = range(6).map(k => (k * 1.5, 0)) - let path-edges = ((0,1),(1,2),(2,3),(3,4),(4,5)) - // Candidate edges: (u, v, weight, selected?) - let candidates = ( - (0, 2, 1, true), (0, 3, 2, false), (0, 4, 3, false), - (1, 3, 1, true), (1, 4, 2, false), (1, 5, 3, false), - (2, 4, 1, true), (2, 5, 2, false), (3, 5, 1, true), - ) - let blue = graph-colors.at(0) - let green = graph-colors.at(2) - let gray = luma(180) - // Draw path edges (existing graph) - for (u, v) in path-edges { - g-edge(verts.at(u), verts.at(v), stroke: 2pt + black) - } - // Draw candidate edges as arcs above the path - for (u, v, w, sel) in candidates { - let mid-x = (verts.at(u).at(0) + verts.at(v).at(0)) / 2 - let span = v - u - let height = span * 0.4 - let ctrl = (mid-x, height) - bezier(verts.at(u), verts.at(v), ctrl, - stroke: if sel { 2.5pt + green } else { (dash: "dashed", paint: gray, thickness: 0.8pt) }) - // Weight label - content((mid-x, height + 0.25), - text(7pt, fill: if sel { green.darken(30%) } else { gray })[#w]) - } - // Draw nodes - for (k, pos) in verts.enumerate() { - g-node(pos, name: "v" + str(k), label: [$v_#k$]) - } - }), - caption: [Biconnectivity Augmentation on a 6-vertex path with $B = 4$. Existing edges are black; green arcs show the selected augmentation $F'$ (total weight 4); dashed gray arcs are unselected candidates. The resulting graph $G' = (V, E union F')$ is biconnected.], -) -] #problem-def("BoundedComponentSpanningForest")[ Given an undirected graph $G = (V, E)$ with vertex weights $w: V -> ZZ_(gt.eq 0)$, a positive integer $K <= |V|$, and a positive bound $B$, determine whether there exists a partition of $V$ into $t$ non-empty sets $V_1, dots, V_t$ with $1 <= t <= K$ such that each induced subgraph $G[V_i]$ is connected and each part satisfies $sum_(v in V_i) w(v) <= B$. diff --git a/problemreductions-cli/src/cli.rs b/problemreductions-cli/src/cli.rs index dd9df51d7..e71a9e426 100644 --- a/problemreductions-cli/src/cli.rs +++ b/problemreductions-cli/src/cli.rs @@ -236,7 +236,6 @@ Flags by problem type: X3C (ExactCoverBy3Sets) --universe, --sets (3 elements each) SetBasis --universe, --sets, --k BicliqueCover --left, --right, --biedges, --k - BiconnectivityAugmentation --graph, --potential-edges, --budget [--num-vertices] BMF --matrix (0/1), --rank SteinerTree --graph, --edge-weights, --terminals CVP --basis, --target-vec [--bounds] @@ -272,7 +271,6 @@ Examples: pred create MIS/KingsSubgraph --positions \"0,0;1,0;1,1;0,1\" pred create MIS/UnitDiskGraph --positions \"0,0;1,0;0.5,0.8\" --radius 1.5 pred create MIS --random --num-vertices 10 --edge-prob 0.3 - pred create BiconnectivityAugmentation --graph 0-1,1-2,2-3 --potential-edges 0-2:3,0-3:4,1-3:2 --budget 5 pred create FVS --arcs \"0>1,1>2,2>0\" --weights 1,1,1 pred create UndirectedTwoCommodityIntegralFlow --graph 0-2,1-2,2-3 --capacities 1,1,2 --source-1 0 --sink-1 3 --source-2 1 --sink-2 3 --requirement-1 1 --requirement-2 1 pred create X3C --universe 9 --sets \"0,1,2;0,2,4;3,4,5;3,5,7;6,7,8;1,4,6;2,5,8\" @@ -440,12 +438,6 @@ pub struct CreateArgs { /// Directed arcs for directed graph problems (e.g., 0>1,1>2,2>0) #[arg(long)] pub arcs: Option, - /// Weighted potential augmentation edges (e.g., 0-2:3,1-3:5) - #[arg(long)] - pub potential_edges: Option, - /// Total budget for selected potential edges - #[arg(long)] - pub budget: Option, /// Deadlines for MinimumTardinessSequencing (comma-separated, e.g., "5,5,5,3,3") #[arg(long)] pub deadlines: Option, @@ -581,46 +573,3 @@ pub fn print_subcommand_help_hint(error_msg: &str) { } } } - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn test_create_parses_biconnectivity_augmentation_flags() { - let cli = Cli::parse_from([ - "pred", - "create", - "BiconnectivityAugmentation", - "--graph", - "0-1,1-2", - "--potential-edges", - "0-2:3,1-3:5", - "--budget", - "7", - ]); - - let Commands::Create(args) = cli.command else { - panic!("expected create command"); - }; - - assert_eq!(args.problem, "BiconnectivityAugmentation"); - assert_eq!(args.graph.as_deref(), Some("0-1,1-2")); - assert_eq!(args.potential_edges.as_deref(), Some("0-2:3,1-3:5")); - assert_eq!(args.budget.as_deref(), Some("7")); - } - - #[test] - fn test_create_help_mentions_biconnectivity_augmentation_flags() { - let cmd = Cli::command(); - let create = cmd.find_subcommand("create").expect("create subcommand"); - let help = create - .get_after_help() - .expect("create after_help") - .to_string(); - - assert!(help.contains("BiconnectivityAugmentation")); - assert!(help.contains("--potential-edges")); - assert!(help.contains("--budget")); - } -} diff --git a/problemreductions-cli/src/commands/create.rs b/problemreductions-cli/src/commands/create.rs index ad872b5b5..03220f4f6 100644 --- a/problemreductions-cli/src/commands/create.rs +++ b/problemreductions-cli/src/commands/create.rs @@ -16,7 +16,6 @@ use problemreductions::models::misc::{ BinPacking, FlowShopScheduling, LongestCommonSubsequence, MinimumTardinessSequencing, PaintShop, SequencingWithinIntervals, ShortestCommonSupersequence, SubsetSum, }; -use problemreductions::models::BiconnectivityAugmentation; use problemreductions::prelude::*; use problemreductions::registry::collect_schemas; use problemreductions::topology::{ @@ -78,13 +77,19 @@ fn all_data_flags_empty(args: &CreateArgs) -> bool { && args.pattern.is_none() && args.strings.is_none() && args.arcs.is_none() - && args.potential_edges.is_none() - && args.budget.is_none() + && args.deadlines.is_none() && args.precedence_pairs.is_none() && args.task_lengths.is_none() && args.deadline.is_none() && args.num_processors.is_none() && args.alphabet_size.is_none() + && args.capacities.is_none() + && args.source_1.is_none() + && args.sink_1.is_none() + && args.source_2.is_none() + && args.sink_2.is_none() + && args.requirement_1.is_none() + && args.requirement_2.is_none() } fn emit_problem_output(output: &ProblemJsonOutput, out: &OutputConfig) -> Result<()> { @@ -223,13 +228,10 @@ fn type_format_hint(type_name: &str, graph_type: Option<&str>) -> &'static str { }, "Vec" => "comma-separated integers: 1,1,2", "Vec" => "comma-separated: 1,2,3", - "Vec<(usize, usize, W)>" | "Vec<(usize,usize,W)>" => { - "comma-separated weighted edges: 0-2:3,1-3:5" - } "Vec" => "semicolon-separated clauses: \"1,2;-1,3\"", "Vec>" => "semicolon-separated rows: \"1,0.5;0.5,2\"", "Vec>" => "semicolon-separated groups: \"0,1;2,3\"", - "usize" | "W::Sum" => "integer", + "usize" => "integer", "u64" => "integer", "Vec" => "comma-separated integers: 0,0,5", "i64" => "integer", @@ -267,9 +269,6 @@ fn example_for(canonical: &str, graph_type: Option<&str>) -> &'static str { "MaxCut" | "MaximumMatching" | "TravelingSalesman" => { "--graph 0-1,1-2,2-3 --edge-weights 1,1,1" } - "BiconnectivityAugmentation" => { - "--graph 0-1,1-2,2-3 --potential-edges 0-2:3,0-3:4,1-3:2 --budget 5" - } "Satisfiability" => "--num-vars 3 --clauses \"1,2;-1,3\"", "KSatisfiability" => "--num-vars 3 --clauses \"1,2,3;-1,2,-3\" --k 3", "QUBO" => "--matrix \"1,0.5;0.5,2\"", @@ -316,7 +315,6 @@ fn help_flag_name(canonical: &str, field_name: &str) -> String { "right_size" => "right".to_string(), "edges" => "biedges".to_string(), "vertex_weights" => "weights".to_string(), - "potential_weights" => "potential-edges".to_string(), "edge_lengths" => "edge-weights".to_string(), "num_tasks" => "n".to_string(), "precedences" => "precedence-pairs".to_string(), @@ -563,26 +561,6 @@ pub fn create(args: &CreateArgs, out: &OutputConfig) -> Result<()> { ) } - // Biconnectivity augmentation - "BiconnectivityAugmentation" => { - let (graph, _) = parse_graph(args).map_err(|e| { - anyhow::anyhow!( - "{e}\n\nUsage: pred create BiconnectivityAugmentation --graph 0-1,1-2,2-3 --potential-edges 0-2:3,0-3:4,1-3:2 --budget 5" - ) - })?; - let potential_edges = parse_potential_edges(args)?; - validate_potential_edges(&graph, &potential_edges)?; - let budget = parse_budget(args)?; - ( - ser(BiconnectivityAugmentation::new( - graph, - potential_edges, - budget, - ))?, - resolved_variant.clone(), - ) - } - // Bounded Component Spanning Forest "BoundedComponentSpanningForest" => { let usage = "Usage: pred create BoundedComponentSpanningForest --graph 0-1,1-2,2-3,3-4,4-5,5-6,6-7,0-7,1-5,2-6 --weights 2,3,1,2,3,1,2,1 --k 3 --bound 6"; @@ -1695,8 +1673,7 @@ fn variant_map(pairs: &[(&str, &str)]) -> BTreeMap { util::variant_map(pairs) } -/// Parse `--graph` into a SimpleGraph, optionally preserving isolated vertices -/// via `--num-vertices`. +/// Parse `--graph` into a SimpleGraph, inferring num_vertices from max index. fn parse_graph(args: &CreateArgs) -> Result<(SimpleGraph, usize)> { let edges_str = args .graph @@ -1704,12 +1681,10 @@ fn parse_graph(args: &CreateArgs) -> Result<(SimpleGraph, usize)> { .ok_or_else(|| anyhow::anyhow!("This problem requires --graph (e.g., 0-1,1-2,2-3)"))?; if edges_str.trim().is_empty() { - let num_vertices = args.num_vertices.ok_or_else(|| { - anyhow::anyhow!( - "Empty graph string. To create a graph with isolated vertices, pass --num-vertices N as well." - ) - })?; - return Ok((SimpleGraph::empty(num_vertices), num_vertices)); + bail!( + "Empty graph string. To create a graph with isolated vertices, use:\n \ + pred create --random --num-vertices N --edge-prob 0.0" + ); } let edges: Vec<(usize, usize)> = edges_str @@ -1732,23 +1707,12 @@ fn parse_graph(args: &CreateArgs) -> Result<(SimpleGraph, usize)> { }) .collect::>>()?; - let inferred_num_vertices = edges + let num_vertices = edges .iter() .flat_map(|(u, v)| [*u, *v]) .max() .map(|m| m + 1) .unwrap_or(0); - let num_vertices = match args.num_vertices { - Some(explicit) if explicit < inferred_num_vertices => { - bail!( - "--num-vertices {} is too small for the provided graph; need at least {}", - explicit, - inferred_num_vertices - ); - } - Some(explicit) => explicit, - None => inferred_num_vertices, - }; Ok((SimpleGraph::new(num_vertices, edges), num_vertices)) } @@ -2129,73 +2093,6 @@ fn parse_matrix(args: &CreateArgs) -> Result>> { .collect() } -fn parse_potential_edges(args: &CreateArgs) -> Result> { - let edges_str = args.potential_edges.as_deref().ok_or_else(|| { - anyhow::anyhow!("BiconnectivityAugmentation requires --potential-edges (e.g., 0-2:3,1-3:5)") - })?; - - edges_str - .split(',') - .map(|entry| { - let entry = entry.trim(); - let (edge_part, weight_part) = entry.split_once(':').ok_or_else(|| { - anyhow::anyhow!("Invalid potential edge '{entry}': expected u-v:w") - })?; - let (u_str, v_str) = edge_part.split_once('-').ok_or_else(|| { - anyhow::anyhow!("Invalid potential edge '{entry}': expected u-v:w") - })?; - let u = u_str.trim().parse::()?; - let v = v_str.trim().parse::()?; - if u == v { - bail!("Self-loop detected in potential edge {u}-{v}"); - } - let weight = weight_part.trim().parse::()?; - Ok((u, v, weight)) - }) - .collect() -} - -fn validate_potential_edges( - graph: &SimpleGraph, - potential_edges: &[(usize, usize, i32)], -) -> Result<()> { - let num_vertices = graph.num_vertices(); - let mut seen_potential_edges = BTreeSet::new(); - for &(u, v, _) in potential_edges { - if u >= num_vertices || v >= num_vertices { - bail!( - "Potential edge {u}-{v} references a vertex outside the graph (num_vertices = {num_vertices})" - ); - } - let edge = if u <= v { (u, v) } else { (v, u) }; - if graph.has_edge(edge.0, edge.1) { - bail!( - "Potential edge {}-{} already exists in the graph", - edge.0, - edge.1 - ); - } - if !seen_potential_edges.insert(edge) { - bail!( - "Duplicate potential edge {}-{} is not allowed", - edge.0, - edge.1 - ); - } - } - Ok(()) -} - -fn parse_budget(args: &CreateArgs) -> Result { - let budget = args - .budget - .as_deref() - .ok_or_else(|| anyhow::anyhow!("BiconnectivityAugmentation requires --budget (e.g., 5)"))?; - budget - .parse::() - .map_err(|e| anyhow::anyhow!("Invalid budget '{budget}': {e}")) -} - /// Parse `--arcs` as directed arc pairs and build a `DirectedGraph`. /// /// Returns `(graph, num_arcs)`. Infers vertex count from arc endpoints @@ -2538,181 +2435,3 @@ mod tests { ); } } - -#[cfg(test)] -mod tests { - use super::*; - - fn empty_args() -> CreateArgs { - CreateArgs { - problem: "BiconnectivityAugmentation".to_string(), - graph: None, - weights: None, - edge_weights: None, - couplings: None, - fields: None, - clauses: None, - num_vars: None, - matrix: None, - k: None, - random: false, - num_vertices: None, - edge_prob: None, - seed: None, - target: None, - m: None, - n: None, - positions: None, - radius: None, - sizes: None, - capacity: None, - sequence: None, - sets: None, - universe: None, - biedges: None, - left: None, - right: None, - rank: None, - basis: None, - target_vec: None, - bounds: None, - strings: None, - arcs: None, - potential_edges: None, - budget: None, - } - } - - #[test] - fn test_all_data_flags_empty_treats_potential_edges_as_input() { - let mut args = empty_args(); - args.potential_edges = Some("0-2:3,1-3:5".to_string()); - assert!(!all_data_flags_empty(&args)); - } - - #[test] - fn test_all_data_flags_empty_treats_budget_as_input() { - let mut args = empty_args(); - args.budget = Some("7".to_string()); - assert!(!all_data_flags_empty(&args)); - } - - #[test] - fn test_parse_potential_edges() { - let mut args = empty_args(); - args.potential_edges = Some("0-2:3,1-3:5".to_string()); - - let potential_edges = parse_potential_edges(&args).unwrap(); - - assert_eq!(potential_edges, vec![(0, 2, 3), (1, 3, 5)]); - } - - #[test] - fn test_parse_potential_edges_rejects_missing_weight() { - let mut args = empty_args(); - args.potential_edges = Some("0-2,1-3:5".to_string()); - - let err = parse_potential_edges(&args).unwrap_err().to_string(); - - assert!(err.contains("u-v:w")); - } - - #[test] - fn test_parse_budget() { - let mut args = empty_args(); - args.budget = Some("7".to_string()); - - assert_eq!(parse_budget(&args).unwrap(), 7); - } - - #[test] - fn test_parse_graph_respects_explicit_num_vertices() { - let mut args = empty_args(); - args.graph = Some("0-1".to_string()); - args.num_vertices = Some(3); - - let (graph, num_vertices) = parse_graph(&args).unwrap(); - - assert_eq!(num_vertices, 3); - assert_eq!(graph.num_vertices(), 3); - assert_eq!(graph.edges(), vec![(0, 1)]); - } - - #[test] - fn test_validate_potential_edges_rejects_existing_graph_edge() { - let err = validate_potential_edges(&SimpleGraph::path(3), &[(0, 1, 5)]) - .unwrap_err() - .to_string(); - - assert!(err.contains("already exists in the graph")); - } - - #[test] - fn test_validate_potential_edges_rejects_duplicate_edges() { - let err = validate_potential_edges(&SimpleGraph::path(4), &[(0, 3, 1), (3, 0, 2)]) - .unwrap_err() - .to_string(); - - assert!(err.contains("Duplicate potential edge")); - } - - #[test] - fn test_create_biconnectivity_augmentation_json() { - let mut args = empty_args(); - args.graph = Some("0-1,1-2,2-3".to_string()); - args.potential_edges = Some("0-2:3,0-3:4,1-3:2".to_string()); - args.budget = Some("5".to_string()); - - let output_path = std::env::temp_dir().join("pred_test_create_biconnectivity.json"); - let out = OutputConfig { - output: Some(output_path.clone()), - quiet: true, - json: false, - auto_json: false, - }; - - create(&args, &out).unwrap(); - - let content = std::fs::read_to_string(&output_path).unwrap(); - let json: serde_json::Value = serde_json::from_str(&content).unwrap(); - assert_eq!(json["type"], "BiconnectivityAugmentation"); - assert_eq!(json["data"]["budget"], 5); - assert_eq!( - json["data"]["potential_weights"][0], - serde_json::json!([0, 2, 3]) - ); - - std::fs::remove_file(output_path).ok(); - } - - #[test] - fn test_create_biconnectivity_augmentation_json_with_isolated_vertices() { - let mut args = empty_args(); - args.graph = Some("0-1".to_string()); - args.num_vertices = Some(3); - args.potential_edges = Some("1-2:1".to_string()); - args.budget = Some("1".to_string()); - - let output_path = - std::env::temp_dir().join("pred_test_create_biconnectivity_isolated.json"); - let out = OutputConfig { - output: Some(output_path.clone()), - quiet: true, - json: false, - auto_json: false, - }; - - create(&args, &out).unwrap(); - - let content = std::fs::read_to_string(&output_path).unwrap(); - let json: serde_json::Value = serde_json::from_str(&content).unwrap(); - let problem: BiconnectivityAugmentation = - serde_json::from_value(json["data"].clone()).unwrap(); - - assert_eq!(problem.num_vertices(), 3); - assert_eq!(problem.potential_weights(), &[(1, 2, 1)]); - assert_eq!(problem.budget(), &1); - - std::fs::remove_file(output_path).ok(); - } -} diff --git a/problemreductions-cli/src/problem_name.rs b/problemreductions-cli/src/problem_name.rs index cea49403b..12404ab7a 100644 --- a/problemreductions-cli/src/problem_name.rs +++ b/problemreductions-cli/src/problem_name.rs @@ -279,10 +279,6 @@ mod tests { assert_eq!(resolve_alias("3SAT"), "3SAT"); // pass-through assert_eq!(resolve_alias("QUBO"), "QUBO"); assert_eq!(resolve_alias("MaxCut"), "MaxCut"); - assert_eq!( - resolve_alias("biconnectivityaugmentation"), - "BiconnectivityAugmentation" - ); // Pass-through for full names assert_eq!( resolve_alias("MaximumIndependentSet"), diff --git a/src/example_db/fixtures/examples.json b/src/example_db/fixtures/examples.json index 48c677752..6e52883b2 100644 --- a/src/example_db/fixtures/examples.json +++ b/src/example_db/fixtures/examples.json @@ -2,7 +2,6 @@ "models": [ {"problem":"BMF","variant":{},"instance":{"k":2,"m":3,"matrix":[[true,true,false],[true,true,true],[false,true,true]],"n":3},"samples":[{"config":[1,0,1,1,0,1,1,1,0,0,1,1],"metric":{"Valid":0}}],"optimal":[{"config":[0,1,1,1,1,0,0,1,1,1,1,0],"metric":{"Valid":0}},{"config":[1,0,1,1,0,1,1,1,0,0,1,1],"metric":{"Valid":0}}]}, {"problem":"BicliqueCover","variant":{},"instance":{"graph":{"edges":[[0,0],[0,1],[1,1],[1,2]],"left_size":2,"right_size":3},"k":2},"samples":[{"config":[1,0,0,1,1,0,1,1,0,1],"metric":{"Valid":6}}],"optimal":[{"config":[0,1,0,1,0,1,0,1,0,1],"metric":{"Valid":5}},{"config":[1,0,1,0,1,0,1,0,1,0],"metric":{"Valid":5}}]}, - 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{"source":{"problem":"TravelingSalesman","variant":{"graph":"SimpleGraph","weight":"i32"},"instance":{"edge_weights":[10,15,20,35,25,30],"graph":{"inner":{"edge_property":"undirected","edges":[[0,1,null],[0,2,null],[0,3,null],[1,2,null],[1,3,null],[2,3,null]],"node_holes":[],"nodes":[null,null,null,null]}}}},"target":{"problem":"ILP","variant":{"variable":"bool"},"instance":{"constraints":[{"cmp":"Eq","rhs":1.0,"terms":[[0,1.0],[1,1.0],[2,1.0],[3,1.0]]},{"cmp":"Eq","rhs":1.0,"terms":[[4,1.0],[5,1.0],[6,1.0],[7,1.0]]},{"cmp":"Eq","rhs":1.0,"terms":[[8,1.0],[9,1.0],[10,1.0],[11,1.0]]},{"cmp":"Eq","rhs":1.0,"terms":[[12,1.0],[13,1.0],[14,1.0],[15,1.0]]},{"cmp":"Eq","rhs":1.0,"terms":[[0,1.0],[4,1.0],[8,1.0],[12,1.0]]},{"cmp":"Eq","rhs":1.0,"terms":[[1,1.0],[5,1.0],[9,1.0],[13,1.0]]},{"cmp":"Eq","rhs":1.0,"terms":[[2,1.0],[6,1.0],[10,1.0],[14,1.0]]},{"cmp":"Eq","rhs":1.0,"terms":[[3,1.0],[7,1.0],[11,1.0],[15,1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[16,1.0],[0,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[16,1.0],[5,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[16,1.0],[0,-1.0],[5,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[17,1.0],[4,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[17,1.0],[1,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[17,1.0],[4,-1.0],[1,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[18,1.0],[1,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[18,1.0],[6,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[18,1.0],[1,-1.0],[6,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[19,1.0],[5,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[19,1.0],[2,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[19,1.0],[5,-1.0],[2,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[20,1.0],[2,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[20,1.0],[7,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[20,1.0],[2,-1.0],[7,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[21,1.0],[6,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[21,1.0],[3,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[21,1.0],[6,-1.0],[3,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[22,1.0],[3,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[22,1.0],[4,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[22,1.0],[3,-1.0],[4,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[23,1.0],[7,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[23,1.0],[0,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[23,1.0],[7,-1.0],[0,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[24,1.0],[0,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[24,1.0],[9,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[24,1.0],[0,-1.0],[9,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[25,1.0],[8,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[25,1.0],[1,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[25,1.0],[8,-1.0],[1,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[26,1.0],[1,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[26,1.0],[10,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[26,1.0],[1,-1.0],[10,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[27,1.0],[9,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[27,1.0],[2,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[27,1.0],[9,-1.0],[2,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[28,1.0],[2,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[28,1.0],[11,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[28,1.0],[2,-1.0],[11,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[29,1.0],[10,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[29,1.0],[3,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[29,1.0],[10,-1.0],[3,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[30,1.0],[3,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[30,1.0],[8,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[30,1.0],[3,-1.0],[8,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[31,1.0],[11,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[31,1.0],[0,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[31,1.0],[11,-1.0],[0,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[32,1.0],[0,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[32,1.0],[13,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[32,1.0],[0,-1.0],[13,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[33,1.0],[12,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[33,1.0],[1,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[33,1.0],[12,-1.0],[1,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[34,1.0],[1,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[34,1.0],[14,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[34,1.0],[1,-1.0],[14,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[35,1.0],[13,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[35,1.0],[2,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[35,1.0],[13,-1.0],[2,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[36,1.0],[2,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[36,1.0],[15,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[36,1.0],[2,-1.0],[15,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[37,1.0],[14,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[37,1.0],[3,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[37,1.0],[14,-1.0],[3,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[38,1.0],[3,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[38,1.0],[12,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[38,1.0],[3,-1.0],[12,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[39,1.0],[15,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[39,1.0],[0,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[39,1.0],[15,-1.0],[0,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[40,1.0],[4,-1.0]]},{"cmp":"Le","rhs":0.0,"terms":[[40,1.0],[9,-1.0]]},{"cmp":"Ge","rhs":-1.0,"terms":[[40,1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+ {"source":{"problem":"TravelingSalesman","variant":{"graph":"SimpleGraph","weight":"i32"},"instance":{"edge_weights":[1,2,3],"graph":{"inner":{"edge_property":"undirected","edges":[[0,1,null],[0,2,null],[1,2,null]],"node_holes":[],"nodes":[null,null,null]}}}},"target":{"problem":"QUBO","variant":{"weight":"f64"},"instance":{"matrix":[[-14.0,14.0,14.0,14.0,1.0,1.0,14.0,2.0,2.0],[0.0,-14.0,14.0,1.0,14.0,1.0,2.0,14.0,2.0],[0.0,0.0,-14.0,1.0,1.0,14.0,2.0,2.0,14.0],[0.0,0.0,0.0,-14.0,14.0,14.0,14.0,3.0,3.0],[0.0,0.0,0.0,0.0,-14.0,14.0,3.0,14.0,3.0],[0.0,0.0,0.0,0.0,0.0,-14.0,3.0,3.0,14.0],[0.0,0.0,0.0,0.0,0.0,0.0,-14.0,14.0,14.0],[0.0,0.0,0.0,0.0,0.0,0.0,0.0,-14.0,14.0],[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,-14.0]],"num_vars":9}},"solutions":[{"source_config":[1,1,1],"target_config":[0,0,1,1,0,0,0,1,0]}]} ] } diff --git a/src/lib.rs b/src/lib.rs index 3b8dc3bae..42bc6c927 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -45,10 +45,9 @@ pub mod prelude { pub use crate::models::algebraic::{BMF, QUBO}; pub use crate::models::formula::{CNFClause, CircuitSAT, KSatisfiability, Satisfiability}; pub use crate::models::graph::{ - BicliqueCover, BiconnectivityAugmentation, BoundedComponentSpanningForest, - DirectedTwoCommodityIntegralFlow, GraphPartitioning, HamiltonianPath, - IsomorphicSpanningTree, LengthBoundedDisjointPaths, SpinGlass, SteinerTree, - SubgraphIsomorphism, + BicliqueCover, BoundedComponentSpanningForest, DirectedTwoCommodityIntegralFlow, + GraphPartitioning, HamiltonianPath, IsomorphicSpanningTree, LengthBoundedDisjointPaths, + SpinGlass, SteinerTree, SubgraphIsomorphism, }; pub use crate::models::graph::{ KColoring, MaxCut, MaximalIS, MaximumClique, MaximumIndependentSet, MaximumMatching, diff --git a/src/models/graph/biconnectivity_augmentation.rs b/src/models/graph/biconnectivity_augmentation.rs deleted file mode 100644 index e6ebedc02..000000000 --- a/src/models/graph/biconnectivity_augmentation.rs +++ /dev/null @@ -1,315 +0,0 @@ -//! Biconnectivity augmentation problem implementation. -//! -//! Given a graph, weighted potential edges, and a budget, determine whether -//! adding some subset of the potential edges can make the graph biconnected -//! without exceeding the budget. - -use crate::registry::{FieldInfo, ProblemSchemaEntry, VariantDimension}; -use crate::topology::{Graph, SimpleGraph}; -use crate::traits::{Problem, SatisfactionProblem}; -use crate::types::WeightElement; -use num_traits::Zero; -use serde::{Deserialize, Serialize}; -use std::collections::BTreeSet; - -inventory::submit! { - ProblemSchemaEntry { - name: "BiconnectivityAugmentation", - display_name: "Biconnectivity Augmentation", - aliases: &[], - dimensions: &[ - VariantDimension::new("graph", "SimpleGraph", &["SimpleGraph"]), - VariantDimension::new("weight", "i32", &["i32"]), - ], - module_path: module_path!(), - description: "Add weighted potential edges to make a graph biconnected within budget", - fields: &[ - FieldInfo { name: "graph", type_name: "G", description: "The underlying graph G=(V,E)" }, - FieldInfo { name: "potential_weights", type_name: "Vec<(usize, usize, W)>", description: "Potential edges with augmentation weights" }, - FieldInfo { name: "budget", type_name: "W::Sum", description: "Maximum total augmentation weight B" }, - ], - } -} - -/// The Biconnectivity Augmentation problem. -/// -/// Given a graph `G = (V, E)`, weighted potential edges, and a budget `B`, -/// determine whether there exists a subset of potential edges `E'` such that: -/// - `sum_{e in E'} w(e) <= B` -/// - `(V, E union E')` is biconnected -#[derive(Debug, Clone, Serialize, Deserialize)] -#[serde(bound( - serialize = "G: serde::Serialize, W: serde::Serialize, W::Sum: serde::Serialize", - deserialize = "G: serde::Deserialize<'de>, W: serde::Deserialize<'de>, W::Sum: serde::Deserialize<'de>" -))] -pub struct BiconnectivityAugmentation -where - W: WeightElement, -{ - /// The underlying graph. - graph: G, - /// Potential augmentation edges with their weights. - potential_weights: Vec<(usize, usize, W)>, - /// Maximum total weight of selected potential edges. - budget: W::Sum, -} - -impl BiconnectivityAugmentation { - /// Create a new biconnectivity augmentation instance. - /// - /// # Panics - /// Panics if any potential edge references a vertex index outside the graph, - /// is a self-loop, duplicates another candidate edge, or already exists in - /// the input graph. - pub fn new(graph: G, potential_weights: Vec<(usize, usize, W)>, budget: W::Sum) -> Self { - let num_vertices = graph.num_vertices(); - let mut seen_potential_edges = BTreeSet::new(); - for &(u, v, _) in &potential_weights { - assert!( - u < num_vertices && v < num_vertices, - "potential edge ({}, {}) references vertex >= num_vertices ({})", - u, - v, - num_vertices - ); - assert!(u != v, "potential edge ({}, {}) is a self-loop", u, v); - let edge = normalize_edge(u, v); - assert!( - !graph.has_edge(edge.0, edge.1), - "potential edge ({}, {}) already exists in the graph", - edge.0, - edge.1 - ); - assert!( - seen_potential_edges.insert(edge), - "potential edge ({}, {}) is duplicated", - edge.0, - edge.1 - ); - } - - Self { - graph, - potential_weights, - budget, - } - } - - /// Get a reference to the underlying graph. - pub fn graph(&self) -> &G { - &self.graph - } - - /// Get the weighted potential edges. - pub fn potential_weights(&self) -> &[(usize, usize, W)] { - &self.potential_weights - } - - /// Get the budget. - pub fn budget(&self) -> &W::Sum { - &self.budget - } - - /// Get the number of vertices in the underlying graph. - pub fn num_vertices(&self) -> usize { - self.graph.num_vertices() - } - - /// Get the number of edges in the underlying graph. - pub fn num_edges(&self) -> usize { - self.graph.num_edges() - } - - /// Get the number of potential augmentation edges. - pub fn num_potential_edges(&self) -> usize { - self.potential_weights.len() - } - - /// Check if the problem uses a non-unit weight type. - pub fn is_weighted(&self) -> bool { - !W::IS_UNIT - } - - fn augmented_graph(&self, config: &[usize]) -> Option { - if config.len() != self.num_potential_edges() || config.iter().any(|&value| value >= 2) { - return None; - } - - let mut total = W::Sum::zero(); - let mut edges = BTreeSet::new(); - - for (u, v) in self.graph.edges() { - edges.insert(normalize_edge(u, v)); - } - - for (selected, &(u, v, ref weight)) in config.iter().zip(&self.potential_weights) { - if *selected == 1 { - total += weight.to_sum(); - if total > self.budget.clone() { - return None; - } - edges.insert(normalize_edge(u, v)); - } - } - - Some(SimpleGraph::new( - self.num_vertices(), - edges.into_iter().collect(), - )) - } -} - -impl Problem for BiconnectivityAugmentation -where - G: Graph + crate::variant::VariantParam, - W: WeightElement + crate::variant::VariantParam, -{ - const NAME: &'static str = "BiconnectivityAugmentation"; - type Metric = bool; - - fn variant() -> Vec<(&'static str, &'static str)> { - crate::variant_params![G, W] - } - - fn dims(&self) -> Vec { - vec![2; self.num_potential_edges()] - } - - fn evaluate(&self, config: &[usize]) -> bool { - self.augmented_graph(config) - .is_some_and(|graph| is_biconnected(&graph)) - } -} - -impl SatisfactionProblem for BiconnectivityAugmentation -where - G: Graph + crate::variant::VariantParam, - W: WeightElement + crate::variant::VariantParam, -{ -} - -fn normalize_edge(u: usize, v: usize) -> (usize, usize) { - if u <= v { - (u, v) - } else { - (v, u) - } -} - -struct DfsState { - visited: Vec, - discovery_time: Vec, - low: Vec, - parent: Vec>, - time: usize, - has_articulation_point: bool, -} - -fn dfs_articulation_points(graph: &G, vertex: usize, state: &mut DfsState) { - if state.has_articulation_point { - return; - } - - state.visited[vertex] = true; - state.time += 1; - state.discovery_time[vertex] = state.time; - state.low[vertex] = state.time; - - let mut child_count = 0; - for neighbor in graph.neighbors(vertex) { - if !state.visited[neighbor] { - child_count += 1; - state.parent[neighbor] = Some(vertex); - dfs_articulation_points(graph, neighbor, state); - state.low[vertex] = state.low[vertex].min(state.low[neighbor]); - - if state.parent[vertex].is_none() && child_count > 1 { - state.has_articulation_point = true; - return; - } - - if state.parent[vertex].is_some() && state.low[neighbor] >= state.discovery_time[vertex] - { - state.has_articulation_point = true; - return; - } - } else if state.parent[vertex] != Some(neighbor) { - state.low[vertex] = state.low[vertex].min(state.discovery_time[neighbor]); - } - } -} - -fn is_biconnected(graph: &G) -> bool { - let num_vertices = graph.num_vertices(); - if num_vertices <= 1 { - return true; - } - - let mut state = DfsState { - visited: vec![false; num_vertices], - discovery_time: vec![0; num_vertices], - low: vec![0; num_vertices], - parent: vec![None; num_vertices], - time: 0, - has_articulation_point: false, - }; - - dfs_articulation_points(graph, 0, &mut state); - - !state.has_articulation_point && state.visited.into_iter().all(|seen| seen) -} - -crate::declare_variants! { - default sat BiconnectivityAugmentation => "2^num_potential_edges", -} - -#[cfg(feature = "example-db")] -pub(crate) fn canonical_model_example_specs() -> Vec { - vec![crate::example_db::specs::ModelExampleSpec { - id: "biconnectivity_augmentation", - build: || { - let problem = BiconnectivityAugmentation::new( - SimpleGraph::path(6), - vec![ - (0, 2, 1), - (0, 3, 2), - (0, 4, 3), - (1, 3, 1), - (1, 4, 2), - (1, 5, 3), - (2, 4, 1), - (2, 5, 2), - (3, 5, 1), - ], - 4, - ); - crate::example_db::specs::satisfaction_example( - problem, - vec![vec![1, 0, 0, 1, 0, 0, 1, 0, 1]], - ) - }, - }] -} - -#[cfg(test)] -pub(crate) fn example_instance() -> BiconnectivityAugmentation { - BiconnectivityAugmentation::new( - SimpleGraph::path(6), - vec![ - (0, 2, 1), - (0, 3, 2), - (0, 4, 3), - (1, 3, 1), - (1, 4, 2), - (1, 5, 3), - (2, 4, 1), - (2, 5, 2), - (3, 5, 1), - ], - 4, - ) -} - -#[cfg(test)] -#[path = "../../unit_tests/models/graph/biconnectivity_augmentation.rs"] -mod tests; diff --git a/src/models/graph/mod.rs b/src/models/graph/mod.rs index 2e68a846d..2152db586 100644 --- a/src/models/graph/mod.rs +++ b/src/models/graph/mod.rs @@ -17,7 +17,6 @@ //! - [`SpinGlass`]: Ising model Hamiltonian //! - [`HamiltonianPath`]: Hamiltonian path (simple path visiting every vertex) //! - [`BicliqueCover`]: Biclique cover on bipartite graphs -//! - [`BiconnectivityAugmentation`]: Biconnectivity augmentation with weighted potential edges //! - [`BoundedComponentSpanningForest`]: Partition vertices into bounded-weight connected components //! - [`OptimalLinearArrangement`]: Optimal linear arrangement (total edge length at most K) //! - [`MinimumFeedbackArcSet`]: Minimum feedback arc set on directed graphs @@ -31,7 +30,6 @@ //! - [`UndirectedTwoCommodityIntegralFlow`]: Two-commodity integral flow on undirected graphs pub(crate) mod biclique_cover; -pub(crate) mod biconnectivity_augmentation; pub(crate) mod bounded_component_spanning_forest; pub(crate) mod directed_two_commodity_integral_flow; pub(crate) mod graph_partitioning; @@ -60,7 +58,6 @@ pub(crate) mod traveling_salesman; pub(crate) mod undirected_two_commodity_integral_flow; pub use biclique_cover::BicliqueCover; -pub use biconnectivity_augmentation::BiconnectivityAugmentation; pub use bounded_component_spanning_forest::BoundedComponentSpanningForest; pub use directed_two_commodity_integral_flow::DirectedTwoCommodityIntegralFlow; pub use graph_partitioning::GraphPartitioning; @@ -108,7 +105,6 @@ pub(crate) fn canonical_model_example_specs() -> Vec as Problem>::NAME, - "BiconnectivityAugmentation" - ); - assert_eq!( - as Problem>::variant(), - vec![("graph", "SimpleGraph"), ("weight", "i32")] - ); - - let unit_problem = - BiconnectivityAugmentation::<_, One>::new(SimpleGraph::path(3), vec![(0, 2, One)], 1); - assert!(!unit_problem.is_weighted()); -} - -#[test] -#[should_panic(expected = "references vertex >= num_vertices")] -fn test_biconnectivity_augmentation_creation_rejects_invalid_potential_edge() { - BiconnectivityAugmentation::new(SimpleGraph::path(4), vec![(0, 4, 1)], 1); -} - -#[test] -#[should_panic(expected = "already exists in the graph")] -fn test_biconnectivity_augmentation_creation_rejects_existing_edge_candidate() { - BiconnectivityAugmentation::new(SimpleGraph::path(4), vec![(1, 2, 1)], 1); -} - -#[test] -#[should_panic(expected = "is duplicated")] -fn test_biconnectivity_augmentation_creation_rejects_duplicate_candidate() { - BiconnectivityAugmentation::new(SimpleGraph::path(4), vec![(0, 3, 1), (3, 0, 2)], 2); -} - -#[test] -fn test_biconnectivity_augmentation_evaluation() { - let problem = BiconnectivityAugmentation::new( - SimpleGraph::path(4), - vec![(0, 2, 5), (1, 3, 1), (0, 3, 2)], - 2, - ); - - assert!(!problem.evaluate(&[0, 0, 0])); - assert!(!problem.evaluate(&[0, 1, 0])); - assert!(problem.evaluate(&[0, 0, 1])); - assert!(!problem.evaluate(&[0, 1, 1])); - assert!(!problem.evaluate(&[2, 0, 0])); - assert!(!problem.evaluate(&[1, 0])); -} - -#[test] -fn test_biconnectivity_augmentation_serialization() { - let problem = - BiconnectivityAugmentation::new(SimpleGraph::path(4), vec![(0, 3, 2), (1, 3, 1)], 2); - - let json = serde_json::to_value(&problem).unwrap(); - let restored: BiconnectivityAugmentation = - serde_json::from_value(json).unwrap(); - - assert_eq!(restored.graph(), problem.graph()); - assert_eq!(restored.potential_weights(), problem.potential_weights()); - assert_eq!(restored.budget(), problem.budget()); -} - -#[test] -fn test_biconnectivity_augmentation_solver() { - let problem = BiconnectivityAugmentation::new( - SimpleGraph::path(4), - vec![(0, 2, 5), (1, 3, 1), (0, 3, 2)], - 2, - ); - let solver = BruteForce::new(); - - let solution = solver - .find_satisfying(&problem) - .expect("expected a satisfying augmentation"); - assert_eq!(solution, vec![0, 0, 1]); - - let all_solutions = solver.find_all_satisfying(&problem); - assert_eq!(all_solutions, vec![vec![0, 0, 1]]); -} - -#[test] -fn test_biconnectivity_augmentation_no_solution() { - let problem = BiconnectivityAugmentation::new(SimpleGraph::path(4), vec![(0, 2, 1)], 1); - let solver = BruteForce::new(); - - assert!(solver.find_satisfying(&problem).is_none()); - assert!(solver.find_all_satisfying(&problem).is_empty()); -} - -#[test] -fn test_biconnectivity_augmentation_paper_example() { - let problem = example_instance(); - let solver = BruteForce::new(); - let satisfying_config = vec![1, 0, 0, 1, 0, 0, 1, 0, 1]; - let satisfying_solutions = solver.find_all_satisfying(&problem); - - assert!(problem.evaluate(&satisfying_config)); - assert!(satisfying_solutions.contains(&satisfying_config)); - - let over_budget_problem = BiconnectivityAugmentation::new( - SimpleGraph::path(6), - vec![ - (0, 2, 1), - (0, 3, 2), - (0, 4, 3), - (1, 3, 1), - (1, 4, 2), - (1, 5, 3), - (2, 4, 1), - (2, 5, 2), - (3, 5, 1), - ], - 3, - ); - assert!(!over_budget_problem.evaluate(&satisfying_config)); - assert!(solver.find_satisfying(&over_budget_problem).is_none()); -} - -#[test] -fn test_is_biconnected() { - assert!(is_biconnected(&SimpleGraph::cycle(4))); - assert!(is_biconnected(&SimpleGraph::complete(3))); - assert!(!is_biconnected(&SimpleGraph::path(4))); - assert!(!is_biconnected(&SimpleGraph::new(4, vec![(0, 1), (2, 3)]))); -} diff --git a/src/unit_tests/trait_consistency.rs b/src/unit_tests/trait_consistency.rs deleted file mode 100644 index af7aff505..000000000 --- a/src/unit_tests/trait_consistency.rs +++ /dev/null @@ -1,157 +0,0 @@ -use crate::models::algebraic::*; -use crate::models::formula::*; -use crate::models::graph::*; -use crate::models::misc::*; -use crate::models::set::*; -use crate::topology::{BipartiteGraph, SimpleGraph}; -use crate::traits::Problem; -use crate::variant::K3; - -fn check_problem_trait(problem: &P, name: &str) { - let dims = problem.dims(); - assert!( - !dims.is_empty() || name.contains("empty"), - "{} should have dimensions", - name - ); - for d in &dims { - assert!( - *d >= 2, - "{} should have at least 2 choices per dimension", - name - ); - } -} - -#[test] -fn test_all_problems_implement_trait_correctly() { - check_problem_trait( - &MaximumIndependentSet::new(SimpleGraph::new(3, vec![(0, 1)]), vec![1i32; 3]), - "MaximumIndependentSet", - ); - check_problem_trait( - &MinimumVertexCover::new(SimpleGraph::new(3, vec![(0, 1)]), vec![1i32; 3]), - "MinimumVertexCover", - ); - check_problem_trait( - &MaxCut::new(SimpleGraph::new(3, vec![(0, 1)]), vec![1i32]), - "MaxCut", - ); - check_problem_trait( - &KColoring::::new(SimpleGraph::new(3, vec![(0, 1)])), - "KColoring", - ); - check_problem_trait( - &MinimumDominatingSet::new(SimpleGraph::new(3, vec![(0, 1)]), vec![1i32; 3]), - "MinimumDominatingSet", - ); - check_problem_trait( - &MaximalIS::new(SimpleGraph::new(3, vec![(0, 1)]), vec![1i32; 3]), - "MaximalIS", - ); - check_problem_trait( - &MaximumMatching::new(SimpleGraph::new(3, vec![(0, 1)]), vec![1i32]), - "MaximumMatching", - ); - check_problem_trait( - &BiconnectivityAugmentation::new(SimpleGraph::path(4), vec![(0, 3, 2)], 2), - "BiconnectivityAugmentation", - ); - check_problem_trait( - &Satisfiability::new(3, vec![CNFClause::new(vec![1])]), - "SAT", - ); - check_problem_trait( - &SpinGlass::new(3, vec![((0, 1), 1.0)], vec![0.0; 3]), - "SpinGlass", - ); - check_problem_trait(&QUBO::from_matrix(vec![vec![1.0; 3]; 3]), "QUBO"); - check_problem_trait( - &MinimumSetCovering::::new(3, vec![vec![0, 1]]), - "MinimumSetCovering", - ); - check_problem_trait( - &MaximumSetPacking::::new(vec![vec![0, 1]]), - "MaximumSetPacking", - ); - check_problem_trait(&PaintShop::new(vec!["a", "a"]), "PaintShop"); - check_problem_trait(&BMF::new(vec![vec![true]], 1), "BMF"); - check_problem_trait( - &BicliqueCover::new(BipartiteGraph::new(2, 2, vec![(0, 0)]), 1), - "BicliqueCover", - ); - check_problem_trait(&Factoring::new(6, 2, 2), "Factoring"); - - let circuit = Circuit::new(vec![Assignment::new( - vec!["x".to_string()], - BooleanExpr::constant(true), - )]); - check_problem_trait(&CircuitSAT::new(circuit), "CircuitSAT"); -} - -#[test] -fn test_direction() { - use crate::traits::OptimizationProblem; - use crate::types::Direction; - - // Minimization problems - assert_eq!( - MinimumVertexCover::new(SimpleGraph::new(2, vec![(0, 1)]), vec![1i32; 2]).direction(), - Direction::Minimize - ); - assert_eq!( - MinimumDominatingSet::new(SimpleGraph::new(2, vec![(0, 1)]), vec![1i32; 2]).direction(), - Direction::Minimize - ); - assert_eq!( - MinimumSetCovering::::new(2, vec![vec![0, 1]]).direction(), - Direction::Minimize - ); - assert_eq!( - PaintShop::new(vec!["a", "a"]).direction(), - Direction::Minimize - ); - assert_eq!( - QUBO::from_matrix(vec![vec![1.0]]).direction(), - Direction::Minimize - ); - assert_eq!( - SpinGlass::new(1, vec![], vec![0.0]).direction(), - Direction::Minimize - ); - assert_eq!( - BMF::new(vec![vec![true]], 1).direction(), - Direction::Minimize - ); - assert_eq!(Factoring::new(6, 2, 2).direction(), Direction::Minimize); - assert_eq!( - BicliqueCover::new(BipartiteGraph::new(2, 2, vec![(0, 0)]), 1).direction(), - Direction::Minimize - ); - - // Maximization problems - assert_eq!( - MaximumIndependentSet::new(SimpleGraph::new(2, vec![(0, 1)]), vec![1i32; 2]).direction(), - Direction::Maximize - ); - assert_eq!( - MaximalIS::new(SimpleGraph::new(2, vec![(0, 1)]), vec![1i32; 2]).direction(), - Direction::Maximize - ); - assert_eq!( - MaxCut::new(SimpleGraph::new(2, vec![(0, 1)]), vec![1i32]).direction(), - Direction::Maximize - ); - assert_eq!( - MaximumMatching::new(SimpleGraph::new(2, vec![(0, 1)]), vec![1i32]).direction(), - Direction::Maximize - ); - assert_eq!( - MaximumSetPacking::::new(vec![vec![0]]).direction(), - Direction::Maximize - ); - assert_eq!( - MaximumClique::new(SimpleGraph::new(2, vec![(0, 1)]), vec![1i32; 2]).direction(), - Direction::Maximize - ); -} diff --git a/tests/suites/integration.rs b/tests/suites/integration.rs index d7a256a4a..49e43f6fa 100644 --- a/tests/suites/integration.rs +++ b/tests/suites/integration.rs @@ -109,19 +109,6 @@ mod all_problems_solvable { } } - #[test] - fn test_biconnectivity_augmentation_solvable() { - let problem = BiconnectivityAugmentation::new( - SimpleGraph::path(4), - vec![(0, 2, 5), (1, 3, 1), (0, 3, 2)], - 2, - ); - let solver = BruteForce::new(); - let satisfying = solver.find_all_satisfying(&problem); - assert_eq!(satisfying, vec![vec![0, 0, 1]]); - assert!(satisfying.iter().all(|config| problem.evaluate(config))); - } - #[test] fn test_satisfiability_solvable() { let problem = Satisfiability::new(