{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:ELFA4VLAG5UC4ANMENZWIGLHDQ","short_pith_number":"pith:ELFA4VLA","canonical_record":{"source":{"id":"1103.2027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2011-03-10T13:12:34Z","cross_cats_sorted":["cs.SE"],"title_canon_sha256":"f68dcac5ad933ede73c147d42e803146100bbc5dec24f4d56a3a76da0a2e7447","abstract_canon_sha256":"ea41cb671176fb6ca06d8715ab4810cc7629cc30f28e53d32abdfa1bb5dd0c19"},"schema_version":"1.0"},"canonical_sha256":"22ca0e556037682e01ac23736419671c07a164fa2b25bbb6fbc8a57b5fb65216","source":{"kind":"arxiv","id":"1103.2027","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.2027","created_at":"2026-05-18T04:27:03Z"},{"alias_kind":"arxiv_version","alias_value":"1103.2027v1","created_at":"2026-05-18T04:27:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.2027","created_at":"2026-05-18T04:27:03Z"},{"alias_kind":"pith_short_12","alias_value":"ELFA4VLAG5UC","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"ELFA4VLAG5UC4ANM","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"ELFA4VLA","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:ELFA4VLAG5UC4ANMENZWIGLHDQ","target":"record","payload":{"canonical_record":{"source":{"id":"1103.2027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2011-03-10T13:12:34Z","cross_cats_sorted":["cs.SE"],"title_canon_sha256":"f68dcac5ad933ede73c147d42e803146100bbc5dec24f4d56a3a76da0a2e7447","abstract_canon_sha256":"ea41cb671176fb6ca06d8715ab4810cc7629cc30f28e53d32abdfa1bb5dd0c19"},"schema_version":"1.0"},"canonical_sha256":"22ca0e556037682e01ac23736419671c07a164fa2b25bbb6fbc8a57b5fb65216","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:03.145922Z","signature_b64":"EC2CafIF/QWMDk7G6iOIYCl3c76AMRtnIng6qeGGh3hs1h+oQIdwzer+ktkhRLsod1yrFzt/bA+kDomfc4RTBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"22ca0e556037682e01ac23736419671c07a164fa2b25bbb6fbc8a57b5fb65216","last_reissued_at":"2026-05-18T04:27:03.145189Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:03.145189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1103.2027","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:27:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5vcwVM4mhectYkPPMQk8AFdzr01HQkd4/F1bMSK2UZl1TkDvEvp4u8oYqO8D6Vu6I2EDlr+Sh6EKe0Mr5MnnBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T19:45:21.231234Z"},"content_sha256":"76a769b3bb20e17e40fe03224195c985a0f122c4174eeb0abe8cb6a58acd7168","schema_version":"1.0","event_id":"sha256:76a769b3bb20e17e40fe03224195c985a0f122c4174eeb0abe8cb6a58acd7168"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:ELFA4VLAG5UC4ANMENZWIGLHDQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Symbolic Execution for Verification","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SE"],"primary_cat":"cs.PL","authors_text":"Andrew E. Santosa, Jorge A. Navas, Joxan Jaffar","submitted_at":"2011-03-10T13:12:34Z","abstract_excerpt":"In previous work, we presented a symbolic execution method which starts with a concrete model of the program but progressively abstracts away details only when these are known to be irrelevant using interpolation. In this paper, we extend the technique to handle unbounded loops. The central idea is to progressively discover the strongest invariants through a process of loop unrolling. The key feature of this technique, called the minimax algorithm, is intelligent backtracking which directs the search for the next invariant. We then present an analysis of the main differences between our symbol"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.2027","kind":"arxiv","version":1},"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":"2026-05-18T04:27:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PNvMrUfI4ss0irtnOY+dQWGjUuGhDQHj/q29QO2Qy1IES61evi52+zyS3ZCGeoTL7GRiET28SeWO3VWLA77NCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T19:45:21.231965Z"},"content_sha256":"58c0584070823077e4db305bbdb628716fbff27c1791c8c46cda1b4242b0928d","schema_version":"1.0","event_id":"sha256:58c0584070823077e4db305bbdb628716fbff27c1791c8c46cda1b4242b0928d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ELFA4VLAG5UC4ANMENZWIGLHDQ/bundle.json","state_url":"https://pith.science/pith/ELFA4VLAG5UC4ANMENZWIGLHDQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ELFA4VLAG5UC4ANMENZWIGLHDQ/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":"2026-05-27T19:45:21Z","links":{"resolver":"https://pith.science/pith/ELFA4VLAG5UC4ANMENZWIGLHDQ","bundle":"https://pith.science/pith/ELFA4VLAG5UC4ANMENZWIGLHDQ/bundle.json","state":"https://pith.science/pith/ELFA4VLAG5UC4ANMENZWIGLHDQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ELFA4VLAG5UC4ANMENZWIGLHDQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ELFA4VLAG5UC4ANMENZWIGLHDQ","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":"ea41cb671176fb6ca06d8715ab4810cc7629cc30f28e53d32abdfa1bb5dd0c19","cross_cats_sorted":["cs.SE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2011-03-10T13:12:34Z","title_canon_sha256":"f68dcac5ad933ede73c147d42e803146100bbc5dec24f4d56a3a76da0a2e7447"},"schema_version":"1.0","source":{"id":"1103.2027","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.2027","created_at":"2026-05-18T04:27:03Z"},{"alias_kind":"arxiv_version","alias_value":"1103.2027v1","created_at":"2026-05-18T04:27:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.2027","created_at":"2026-05-18T04:27:03Z"},{"alias_kind":"pith_short_12","alias_value":"ELFA4VLAG5UC","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"ELFA4VLAG5UC4ANM","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"ELFA4VLA","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:58c0584070823077e4db305bbdb628716fbff27c1791c8c46cda1b4242b0928d","target":"graph","created_at":"2026-05-18T04:27:03Z","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":"In previous work, we presented a symbolic execution method which starts with a concrete model of the program but progressively abstracts away details only when these are known to be irrelevant using interpolation. In this paper, we extend the technique to handle unbounded loops. The central idea is to progressively discover the strongest invariants through a process of loop unrolling. The key feature of this technique, called the minimax algorithm, is intelligent backtracking which directs the search for the next invariant. We then present an analysis of the main differences between our symbol","authors_text":"Andrew E. Santosa, Jorge A. Navas, Joxan Jaffar","cross_cats":["cs.SE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2011-03-10T13:12:34Z","title":"Symbolic Execution for Verification"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.2027","kind":"arxiv","version":1},"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":"sha256:76a769b3bb20e17e40fe03224195c985a0f122c4174eeb0abe8cb6a58acd7168","target":"record","created_at":"2026-05-18T04:27:03Z","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":"ea41cb671176fb6ca06d8715ab4810cc7629cc30f28e53d32abdfa1bb5dd0c19","cross_cats_sorted":["cs.SE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2011-03-10T13:12:34Z","title_canon_sha256":"f68dcac5ad933ede73c147d42e803146100bbc5dec24f4d56a3a76da0a2e7447"},"schema_version":"1.0","source":{"id":"1103.2027","kind":"arxiv","version":1}},"canonical_sha256":"22ca0e556037682e01ac23736419671c07a164fa2b25bbb6fbc8a57b5fb65216","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"22ca0e556037682e01ac23736419671c07a164fa2b25bbb6fbc8a57b5fb65216","first_computed_at":"2026-05-18T04:27:03.145189Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:27:03.145189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EC2CafIF/QWMDk7G6iOIYCl3c76AMRtnIng6qeGGh3hs1h+oQIdwzer+ktkhRLsod1yrFzt/bA+kDomfc4RTBA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:27:03.145922Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.2027","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:76a769b3bb20e17e40fe03224195c985a0f122c4174eeb0abe8cb6a58acd7168","sha256:58c0584070823077e4db305bbdb628716fbff27c1791c8c46cda1b4242b0928d"],"state_sha256":"873223c53ccd753ce845b545a649a6c08d89d2165f130ca3ac65f1e8dee7993b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sFLPRDP3pIP2ldm1jKvfAn1v3CjT27M8cecWZnfmlMf8kAjVYbIla5HKE9P7h4Erso5HQ7NsQrjJgvhxEcYxDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T19:45:21.235629Z","bundle_sha256":"98d7ca2c6200e09e2504be8b0a98bd6389aead9e6d5159848d59504b8e7b2e0d"}}