feat: add --step-timeout option for kontrol prove - #1160
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automergerpr-permission-manager[bot] merged 1 commit intoJun 24, 2026
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Exposes pyk's per-step timeout through `kontrol prove`. When `--step-timeout S` is set, each rewrite step is given a wall-clock budget of `S` whole seconds; on timeout the backend request is interrupted, the execution depth is halved, and the step is retried (enforced by `APRProver`, threaded via `run_prover`). Default `None` disables the timeout, leaving prior behavior unchanged.
ehildenb
approved these changes
Jun 24, 2026
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Exposes pyk's per-step timeout through
kontrol prove.When
--step-timeout Sis set, each rewrite step gets a wall-clock budget ofSwhole seconds; on timeout the backend request is interrupted, the execution depth is halved, and the step is retried. DefaultNonedisables it (prior behavior unchanged).The mechanism lives in pyk's
APRProver(runtimeverification/k#4930) and is threaded throughrun_prover(runtimeverification/evm-semantics#2867, in kevm-pyk v1.0.921, already pinned on master). This PR only wires the CLI option →ProveOptions→run_prover.Note:
step_timeoutis only enforced on the sequentialadvance_proofpath, sorun_proverruns sequentially when it is set, warning ifmax_frontier_parallel > 1. Making the parallel path honor it is a pyk follow-up.Testing
kontrol prove --helpshows--step-timeout.ProveOptionscarriesstep_timeout, and bothkevm_pyk.utils.run_proverand pykAPRProveraccept it.