<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'sourceforge.net',cType: 'managed',cRay: '9672302982b71ce8',cH: 'OU__aILqPkIzx5QozH2GCeVBJidBll3nGGrTonbVN2o-1753850533-1.2.1.1-2NpSTOE.ljI4UQn3cco5TMxKDNYLn5sC2I7YGzfXgN12aLec7SJIlEeCoh3KEKFX',cUPMDTk:"\/p\/xsb\/src\/6936\/tree\/\/trunk\/XSB\/docs\/userman\/debugging.tex?__cf_chl_tk=Y8oSKJPZjnqX1hy9u4PctkHVYZTyf1HAINLk1lLLXt0-1753850533-1.0.1.1-ovlLScnZJaJ8ad2gmW_c5Y8r9GVTKjw3D5B21ZaR8_0",cFPWv: 'b',cITimeS: '1753850533',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/p\/xsb\/src\/6936\/tree\/\/trunk\/XSB\/docs\/userman\/debugging.tex?__cf_chl_f_tk=Y8oSKJPZjnqX1hy9u4PctkHVYZTyf1HAINLk1lLLXt0-1753850533-1.0.1.1-ovlLScnZJaJ8ad2gmW_c5Y8r9GVTKjw3D5B21ZaR8_0",md: 'Kk1.J1A78Dvvmem3jYbD9TFyjZw5FXX7sJP6JAn6BTk-1753850533-1.2.1.1-iVGeE7lo.nqrmmwupZVaDRIpKM2fbOVjloh7DwFtHxvOAd.nSahMaVVXJT8DDOjVrGcTtShY8dxIWyEFZLa_eMF315mZAceAree1.efU8gjFb9Uw_9.kCBnVJNTbik2BzAzHZLnUXFaVQBi546yPoTWze8Kyj7AbqbDImzvjZeTYimQOwr867Y3NvAlNIH.Cs2bNCL6bRU.TQSXSrpYLUWlL7eNsKa88xiiVLKyuZ5HNaqx4lrZ6PbO7P4aDdizl5tigPkt2t9rUc1fJaLwMtpDkS9KOtFt6ZtWwmGNwDV.g3GYqoQsKfdV0efEBlOD5EReAOA66qx.l59O.m92V1CYv2XA9CYURY..WF0zMdaScRKPI8Ap5BkSnCKQAz8ec4eBRwqUQ.RNN3qdUedrYuDf4_RBqmoqLic7CHxe8foNBUU3vNElC3nSBur1m_95WWlK3YgSOzh_aDjP0bBIQj9WMoKVu1_E_Y8fgJdFMYmKG07yyv0HPtc7UTDkyqvAhCYlcy7tt7ZpQpVIV_YmI0dBfmWIbbaD_uCcfuHa57NbOV7v1RTuIUKpATf5GbJj5PCzWkdqX9nnMmqTBkqQ7FOFwaVsyOOaP7VcJgYTu2d5MrveOrr1rpaxoXDjRFX97lpwBaMBpEsHxpwavXDgZ7Xgf0V1LejCk5TnxbWwubOoOTDpgN23D8kFOj8JvSc33L9P79uzvYD9Sc76VT8XWJ.X3E2VjwbmUfLUC9QrpUvrwXaNsYF4pd0Sx8WsuUI4Bai3Ua7HPgd2.gKYumOgAVQNZ8KzFLlGkgV9nV5ZvA3SwDQqplOm2vPayT1vdeCqGoz58JNwwOQ9DUM9NHSd5J0Z_oukKomP4O_YjqZDFJ3ng_FUTSzRS1vLvqT4.D0HF5gsDpmOWuf0kXCBuwUMgjofcX2kfTDeCftamuEO7UEj7.rqfmoZL42Rwruye6iBx5Dbf5rGJjWbAcyiEcrrcCv0TtjqgNtJWSj4Wr4URIIHw4L1RNw8C0cL2opjeOAov',mdrd: 'V12_.ZU8880lWLdyqpCIW10T.WH2_7Hx09HX8_c.TUQ-1753850533-1.2.1.1-LX8j1QrE4_iCP1T4Dc8EWc6H97.kgFxGQVL.G2bSGFcFZURyLAImS1xJJi0j0V3yBDF3iLekwJ6z6F5hOALxDPCxz.lJxI0WM6Uye7MwELw86rSjRBjltsCSgq6wgjZryB3Vn3tc0RKZ3ux2HYEPF5_c.qzZwi6KfjkYBi5iM2TKkmlypfOgJGkTDY1kpsuE0IYSoUpQlb60DnU3jt9QA9B3AKbKYkf36RwWU6HBDW0z8ASc17bUPcYNUr79OUYHf6oCywALRJzKNZd0vS7C90WRb0qyqqp80AUbuf117ginkhFrJ443nlsokWGj0UNnc1etJdhlZfW7NfPMejvs43OPS65JVCzfLYom.LXxnQx2jpxQJ7kswWW6GMe2mqFsarCNqnjYYlhkBiNEzqUtKUaKG2HLajMoJeQD4bf_eITZlQuAEQnpJ9te3pSRun_79XZ0HHNbW44Hd0RyM2yM_UVjbrtnMeRMFP9xMJ48j6DV8zlLrk8YkJM9J1W7pC_CUXlhNOO3MzgrjpdnR.zUJ4dnWVU_joeU5cDBe3DV14A3iPLSQ8z7W4cxjmcY9v3J8gco9MtcAs5SHU586JuT6swbUytbpUX53pTtT4_oA3IaT6fb3S6SnIPxjXxPUJwlGcSa7wrsODJhk2cu3MgWN8FYZrQ6SlVsNp6ir1Aj4nOpnCaHynBSnsb0RirThtCrlXoKJ65f.G2O8mrLAeFXWcjyGrGc0lx6SWGHUsakFtBplZg3_ci5Mgu3TALYWLlox6SRXEb2.N4WZoO2XmPSIngfYcz7vCjgMBB2P_3QaorDSNe7sQtwTnvLc5DM_eQAyJmOdwNqXEq2UBbbqMQ9Teyjwzin3QteiJ9yDdMqY6xbQXpv4YNGI.x3EMXC280dnGsqvcHMrG2C_IDd.4NWJtjeGpG_bpOyBcN1VVZqmBhJozdczQt5MrgDulNuwvFgb6OPl_hY5IZriD30vBKXXSYeyuqxv3zAuhdbh_0biUHepYVOe4eFumRglwjpLemyLfTvC0At6LdHu4J7dtvI9h_TvFvGTuA6QnYoIKOsyefQxwJAq0sZLq_Sn2KGHq2UiHYqaNI9bGG1nGoK.QtWEv5qNj8Isu0MLfHp5z4YsHuqVOHjUUwFjo2My.7K2_3NLEgAF8l.pAayK7AxPaJIUKYPhIG1GnECUXlEPY4vP9aIz6aZ4N1fYzqqW4WfD9faA49IAnXABEP12PbBaex89lk3TPZR8BQlxqxZo6dlnNxZ213HtmFdk8Pnp7D8YfHIgUvHhTiE4eFWE1Xl37ytlsQ5iK_3kjJyXbcjoCfP2ZF7LYumWFnanXMfhp4DtSglu.iizycBu6tzVMYtDEveaF6jZn1crspgK1.5_aaoJzey6C4cTivpAPh_YvEU6HKl_gMNABkRYuMY2SPAtwp6RzkT4znKn.HFMRcX68a3WltKtyTkK7qkEVRsPdxwBiBuAVVeoygUejLpnQ_3t1gYhu2WoVE8T6MzXmQnUoNIHT1MPllb8nWXgDmsH_Wq_qrx3i_ycblC1isYmyKeP03UlhlRUHExRr5A4bcjQ7hsYW2Ms0YCuZ57XUpmP3IqKG6sHwJgVB1fcJxUiZLdKBqgV9OQMooXlcjwX7Xxzo_2wDAzkcAg1m9eFqYsauBIQYKMgdC1rli027C4aPhWfheSIJwArHUFLJL8u5XED8fmvHuCToFnV2jwKi78rrTRqk91Fl7My.9JfIVzBwfjU_Ji5OpDffR6drIQUhZau7zeSSRw95B1JhjZPANnfkP5CMAfsIv9VbplfiqAnzLCNSxxFg_CC_eGq_XEg1ER1LzQRHQZhEcHYhHbtn169AsdRqBtTDFU0BXCRD.z6IZrZy7giUdfqP8MdNOFJBNX2vCjsUqS17u.FKkTgYl8kciBbv4OdhJ9fuDUKEOHObF3N99.x9HZwlvQvNq96vswZp3tZw2ySXzii6bxaw2cmW9ohtL2EiJEWVfNoE2GfJppATmxmoKHYasKPsLSwMydEVJqg_ANaOfJWlSzLBnAGe2ItYEZQRB9DsXBbU88ZUQuOco8jig_jJXK9cf2EPc2.xDy8JLvpsXvZzLLWvaw..KXg9HrkNzJQtRb2RxkOZBijP8QYxHqFVlwQ5phe161TeQttTiHVJNJJf4e9LuhrXLe5qV1G3kciDwNvpAFPbcM4KP0_7ioocbw4y90os2bNOhRXSLvTtd5ZhodFbqLK9gmYM7y_wU8TraulvD4O0UdsOddVCYjRYOM78Z3vpdf1fWtaC5tq9SYuck67ZaGY1J3oPigeyqLm1QEvOi5LhNdYtRVenwT4hGDD6FKD5ezKStQEDg4aIavYewuEZwbUjh.QacSY4TTUHJUGtWcNlk4pW_85YcyyYg6ocJFox96ikctfKhoDWlPteyIsalUboyXK1.SFnZIcdXUBkCQygn6gR8WNTBs8TQjc6x4sIekgYjXEHcRKtDs4yY6Hbl0KAJiC4dMX48I303.bayy4aTAB_9RNTdvRRVKld_HnB1C7sja6a9YU6pMHL_vPceZ15h.th88M8N7b3HrG62PS9p7kkIQZLq32VEZLHdpL9MuQrKJb.c7aIpTg90YkUYfqktvFCE8',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9672302982b71ce8';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null,"\/p\/xsb\/src\/6936\/tree\/\/trunk\/XSB\/docs\/userman\/debugging.tex?__cf_chl_rt_tk=Y8oSKJPZjnqX1hy9u4PctkHVYZTyf1HAINLk1lLLXt0-1753850533-1.0.1.1-ovlLScnZJaJ8ad2gmW_c5Y8r9GVTKjw3D5B21ZaR8_0"+ window._cf_chl_opt.cOgUHash);a.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(a);}());</script></body></html>