{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:Y6XIHILI7VJJVUKZWJMY3JSZ5R","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"22ffb048f4515aaa62de6b5a8c1254d6e769f6b555c98f31ecdcf5e133dbd3cf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2015-07-17T02:21:05Z","title_canon_sha256":"16cc2ef7fd18e478462a82a759547b52e24dfa846df2e05705e3cdf771e84b10"},"schema_version":"1.0","source":{"id":"1507.04817","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.04817","created_at":"2026-05-18T01:18:52Z"},{"alias_kind":"arxiv_version","alias_value":"1507.04817v3","created_at":"2026-05-18T01:18:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.04817","created_at":"2026-05-18T01:18:52Z"},{"alias_kind":"pith_short_12","alias_value":"Y6XIHILI7VJJ","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"Y6XIHILI7VJJVUKZ","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"Y6XIHILI","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:3c1e5b7fcfe79235247ecfbe64e7f62ef47faca392abc61779d8a1cc210c87b0","target":"graph","created_at":"2026-05-18T01:18:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We present a new approach to automated reasoning about higher-order programs by endowing symbolic execution with a notion of higher-order, symbolic values. Our approach is sound and relatively complete with respect to a first-order solver for base type values. Therefore, it can form the basis of automated verification and bug-finding tools for higher-order programs.\n  To validate our approach, we use it to develop and evaluate a system for verifying and refuting behavioral software contracts of components in a functional language, which we call soft contract verification. In doing so, we disco","authors_text":"David Van Horn, Phuc C. Nguyen, Sam Tobin-Hochstadt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2015-07-17T02:21:05Z","title":"Higher-order symbolic execution for contract verification and refutation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.04817","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d305f94912e996124774f94a12b42aa992098f93d662a381324fb31bf3da271c","target":"record","created_at":"2026-05-18T01:18:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"22ffb048f4515aaa62de6b5a8c1254d6e769f6b555c98f31ecdcf5e133dbd3cf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2015-07-17T02:21:05Z","title_canon_sha256":"16cc2ef7fd18e478462a82a759547b52e24dfa846df2e05705e3cdf771e84b10"},"schema_version":"1.0","source":{"id":"1507.04817","kind":"arxiv","version":3}},"canonical_sha256":"c7ae83a168fd529ad159b2598da659ec7f2feb82399fe5a7fc4ec49d7e961d7c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c7ae83a168fd529ad159b2598da659ec7f2feb82399fe5a7fc4ec49d7e961d7c","first_computed_at":"2026-05-18T01:18:52.586396Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:52.586396Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"th3I6chqJPw/MGrwVcskFrsRmHo4Lqipf23K3L9SkLhUgtaYrzLavd0TnX6/wXapnYrPICKUENJcFX3RenRoAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:52.586894Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.04817","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d305f94912e996124774f94a12b42aa992098f93d662a381324fb31bf3da271c","sha256:3c1e5b7fcfe79235247ecfbe64e7f62ef47faca392abc61779d8a1cc210c87b0"],"state_sha256":"c401fe0543ad3b563de2b8741189f80c023f3f015545040c3fc0ee61fb52e48e"}