{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:W3Q3A3CRCFTZIJCOETDQU7YNN7","short_pith_number":"pith:W3Q3A3CR","canonical_record":{"source":{"id":"1709.04986","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2017-09-14T21:34:25Z","cross_cats_sorted":[],"title_canon_sha256":"a43eaed092df7f946ddcdf858d9906a804750f76f831122eb4f4e41e19ec278b","abstract_canon_sha256":"45c544269ae517bac9c599b92e7e3e225742d57610868878be887d6c6d0781e6"},"schema_version":"1.0"},"canonical_sha256":"b6e1b06c51116794244e24c70a7f0d6fd2fb3d8e93a5d80c3b8dbc1f242fbdfc","source":{"kind":"arxiv","id":"1709.04986","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.04986","created_at":"2026-05-18T00:20:24Z"},{"alias_kind":"arxiv_version","alias_value":"1709.04986v2","created_at":"2026-05-18T00:20:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.04986","created_at":"2026-05-18T00:20:24Z"},{"alias_kind":"pith_short_12","alias_value":"W3Q3A3CRCFTZ","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"W3Q3A3CRCFTZIJCO","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"W3Q3A3CR","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:W3Q3A3CRCFTZIJCOETDQU7YNN7","target":"record","payload":{"canonical_record":{"source":{"id":"1709.04986","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2017-09-14T21:34:25Z","cross_cats_sorted":[],"title_canon_sha256":"a43eaed092df7f946ddcdf858d9906a804750f76f831122eb4f4e41e19ec278b","abstract_canon_sha256":"45c544269ae517bac9c599b92e7e3e225742d57610868878be887d6c6d0781e6"},"schema_version":"1.0"},"canonical_sha256":"b6e1b06c51116794244e24c70a7f0d6fd2fb3d8e93a5d80c3b8dbc1f242fbdfc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:24.311503Z","signature_b64":"5wHEVubRw9Mqfu+yCf/d5VAUKLH6U+E2b1P2PCGh1XlF72dQUYVEReTKkUWX4wPKpOd7MpPN+V+/tQ60xDmQBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b6e1b06c51116794244e24c70a7f0d6fd2fb3d8e93a5d80c3b8dbc1f242fbdfc","last_reissued_at":"2026-05-18T00:20:24.311067Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:24.311067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1709.04986","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:20:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W1G3LL2v0+8qWrZ6h3nDXN8NaK5GJTqmQbHKzxEFkG76QLqpLwR+2VMwPbkYdm9S9MwTqLwWf6JZfgnulR1mDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T10:43:04.506136Z"},"content_sha256":"5e6acf3ba304d3b2f1eff56de8f4018eac941ca62b6f4c02600e202e30b4b8d1","schema_version":"1.0","event_id":"sha256:5e6acf3ba304d3b2f1eff56de8f4018eac941ca62b6f4c02600e202e30b4b8d1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:W3Q3A3CRCFTZIJCOETDQU7YNN7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Validity-Guided Synthesis of Reactive Systems from Assume-Guarantee Contracts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.SE","authors_text":"Andreas Katis, Andrew Gacek, Arie Gurfinkel, Grigory Fedyukovich, Huajun Guo, John Backes, Michael W. Whalen","submitted_at":"2017-09-14T21:34:25Z","abstract_excerpt":"Automated synthesis of reactive systems from specifications has been a topic of research for decades. Recently, a variety of approaches have been proposed to extend synthesis of reactive systems from proposi- tional specifications towards specifications over rich theories. We propose a novel, completely automated approach to program synthesis which reduces the problem to deciding the validity of a set of forall-exists formulas. In spirit of IC3 / PDR, our problem space is recursively refined by blocking out regions of unsafe states, aiming to discover a fixpoint that describes safe reactions. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.04986","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:20:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DS7O66jnJztfoVefYC3wfLBe4ehrXwPUmka8WoL3UWHOAcdZ8Zk0zR6rlstdWtq/+CDP/qndqBi3+2IAMEx0DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T10:43:04.506514Z"},"content_sha256":"e1a290144162023916ac4f57374d8ea60e078f2aa00fdea93f7b485339b069b6","schema_version":"1.0","event_id":"sha256:e1a290144162023916ac4f57374d8ea60e078f2aa00fdea93f7b485339b069b6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W3Q3A3CRCFTZIJCOETDQU7YNN7/bundle.json","state_url":"https://pith.science/pith/W3Q3A3CRCFTZIJCOETDQU7YNN7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W3Q3A3CRCFTZIJCOETDQU7YNN7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-23T10:43:04Z","links":{"resolver":"https://pith.science/pith/W3Q3A3CRCFTZIJCOETDQU7YNN7","bundle":"https://pith.science/pith/W3Q3A3CRCFTZIJCOETDQU7YNN7/bundle.json","state":"https://pith.science/pith/W3Q3A3CRCFTZIJCOETDQU7YNN7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W3Q3A3CRCFTZIJCOETDQU7YNN7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:W3Q3A3CRCFTZIJCOETDQU7YNN7","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":"45c544269ae517bac9c599b92e7e3e225742d57610868878be887d6c6d0781e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2017-09-14T21:34:25Z","title_canon_sha256":"a43eaed092df7f946ddcdf858d9906a804750f76f831122eb4f4e41e19ec278b"},"schema_version":"1.0","source":{"id":"1709.04986","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.04986","created_at":"2026-05-18T00:20:24Z"},{"alias_kind":"arxiv_version","alias_value":"1709.04986v2","created_at":"2026-05-18T00:20:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.04986","created_at":"2026-05-18T00:20:24Z"},{"alias_kind":"pith_short_12","alias_value":"W3Q3A3CRCFTZ","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"W3Q3A3CRCFTZIJCO","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"W3Q3A3CR","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:e1a290144162023916ac4f57374d8ea60e078f2aa00fdea93f7b485339b069b6","target":"graph","created_at":"2026-05-18T00:20:24Z","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":"Automated synthesis of reactive systems from specifications has been a topic of research for decades. Recently, a variety of approaches have been proposed to extend synthesis of reactive systems from proposi- tional specifications towards specifications over rich theories. We propose a novel, completely automated approach to program synthesis which reduces the problem to deciding the validity of a set of forall-exists formulas. In spirit of IC3 / PDR, our problem space is recursively refined by blocking out regions of unsafe states, aiming to discover a fixpoint that describes safe reactions. ","authors_text":"Andreas Katis, Andrew Gacek, Arie Gurfinkel, Grigory Fedyukovich, Huajun Guo, John Backes, Michael W. Whalen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2017-09-14T21:34:25Z","title":"Validity-Guided Synthesis of Reactive Systems from Assume-Guarantee Contracts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.04986","kind":"arxiv","version":2},"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":"sha256:5e6acf3ba304d3b2f1eff56de8f4018eac941ca62b6f4c02600e202e30b4b8d1","target":"record","created_at":"2026-05-18T00:20:24Z","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":"45c544269ae517bac9c599b92e7e3e225742d57610868878be887d6c6d0781e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2017-09-14T21:34:25Z","title_canon_sha256":"a43eaed092df7f946ddcdf858d9906a804750f76f831122eb4f4e41e19ec278b"},"schema_version":"1.0","source":{"id":"1709.04986","kind":"arxiv","version":2}},"canonical_sha256":"b6e1b06c51116794244e24c70a7f0d6fd2fb3d8e93a5d80c3b8dbc1f242fbdfc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b6e1b06c51116794244e24c70a7f0d6fd2fb3d8e93a5d80c3b8dbc1f242fbdfc","first_computed_at":"2026-05-18T00:20:24.311067Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:24.311067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5wHEVubRw9Mqfu+yCf/d5VAUKLH6U+E2b1P2PCGh1XlF72dQUYVEReTKkUWX4wPKpOd7MpPN+V+/tQ60xDmQBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:24.311503Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.04986","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5e6acf3ba304d3b2f1eff56de8f4018eac941ca62b6f4c02600e202e30b4b8d1","sha256:e1a290144162023916ac4f57374d8ea60e078f2aa00fdea93f7b485339b069b6"],"state_sha256":"f8a7bc178e8f3bc1908116d207f2b052ca7add73ef04007e37fff6575a987271"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V+KIOkRysKhseq+rIknOUlVXgqxpz1ccXcJhMCjBk3cZ87cGg3v2h22vN5OTxA0EmOTiq+Xg+RQGmZXdr2ExDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T10:43:04.508558Z","bundle_sha256":"b403b23d22a281e42bed19e1dcab1a09658cc3340cc17e65a352c985904e9814"}}