{"action":"created","issue":{"url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/561","repository_url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL","labels_url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/561/labels{/name}","comments_url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/561/comments","events_url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/561/events","html_url":"https://github.com/HOL-Theorem-Prover/HOL/issues/561","id":337881601,"node_id":"MDU6SXNzdWUzMzc4ODE2MDE=","number":561,"title":"Strange tactic behavior HOL-k10 vs HOL-k12","user":{"login":"ahmedwaqar","id":21281602,"node_id":"MDQ6VXNlcjIxMjgxNjAy","avatar_url":"https://avatars2.githubusercontent.com/u/21281602?v=4","gravatar_id":"","url":"https://api.github.com/users/ahmedwaqar","html_url":"https://github.com/ahmedwaqar","followers_url":"https://api.github.com/users/ahmedwaqar/followers","following_url":"https://api.github.com/users/ahmedwaqar/following{/other_user}","gists_url":"https://api.github.com/users/ahmedwaqar/gists{/gist_id}","starred_url":"https://api.github.com/users/ahmedwaqar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ahmedwaqar/subscriptions","organizations_url":"https://api.github.com/users/ahmedwaqar/orgs","repos_url":"https://api.github.com/users/ahmedwaqar/repos","events_url":"https://api.github.com/users/ahmedwaqar/events{/privacy}","received_events_url":"https://api.github.com/users/ahmedwaqar/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":10,"created_at":"2018-07-03T12:40:15Z","updated_at":"2018-07-05T19:20:43Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"I observed a strange behavior of the same tactic in HOL-k10 vs HOL-k12\r\n\r\nConsider a proof goal\r\n\r\n``?!m. ((m = n) \\/ m < n) /\\ ((if m < n then f m else a) = x)``\r\n\r\ne (CONV_TAC(ONCE_DEPTH_CONV COND_ELIM_CONV));\r\n\r\n(* In HOL-k10, the tactic results a desired behavior*)\r\n\r\n``?!m. ((m = n) \\/ m < n) /\\ (~(m < n) \\/ (f m = x)) /\\ (m < n \\/ (a = x))``\r\n\r\n(* In HOL-k12, the tactic results *) \r\n\r\n``?!m. ((m = n) \\/ m < n) /\\ (if m < n then $= (f m) else $= a) x``"},"comment":{"url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/comments/402826525","html_url":"https://github.com/HOL-Theorem-Prover/HOL/issues/561#issuecomment-402826525","issue_url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/561","id":402826525,"node_id":"MDEyOklzc3VlQ29tbWVudDQwMjgyNjUyNQ==","user":{"login":"barakeel","id":4567783,"node_id":"MDQ6VXNlcjQ1Njc3ODM=","avatar_url":"https://avatars1.githubusercontent.com/u/4567783?v=4","gravatar_id":"","url":"https://api.github.com/users/barakeel","html_url":"https://github.com/barakeel","followers_url":"https://api.github.com/users/barakeel/followers","following_url":"https://api.github.com/users/barakeel/following{/other_user}","gists_url":"https://api.github.com/users/barakeel/gists{/gist_id}","starred_url":"https://api.github.com/users/barakeel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/barakeel/subscriptions","organizations_url":"https://api.github.com/users/barakeel/orgs","repos_url":"https://api.github.com/users/barakeel/repos","events_url":"https://api.github.com/users/barakeel/events{/privacy}","received_events_url":"https://api.github.com/users/barakeel/received_events","type":"User","site_admin":false},"created_at":"2018-07-05T19:20:43Z","updated_at":"2018-07-05T19:20:43Z","author_association":"CONTRIBUTOR","body":"I admit I am bit in the dark here, maybe more test characterizing the behaviour of these functions are necessary."}}
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