| {"id":"demo-problem-1","statement":"theorem demo_nonneg (x : ℝ) : x ^ 2 ≥ 0","context":["import Mathlib"],"tacticHint":"nlinarith","meta":{"source":"granite-4.1-verifier","timestamp":"2026-07-14T00:00:00Z","operatorSig":"ED25519_SIG_PLACEHOLDER","maxSteps":30,"allowedTactics":["rw","simp_all","norm_num","linarith","nlinarith","aesop","apply","exact","intro","obtain","cases","induction","constructor","split_ifs","field_simp","ring_nf","norm_cast","omega"]}} | |