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CBMC: Improve readability of CBMC specs#1116

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cbmc_readability
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CBMC: Improve readability of CBMC specs#1116
hanno-becker wants to merge 1 commit into
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cbmc_readability

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CBMC contracts in this repo currently require one instance of requires(memory_no_alias(...)) per pointer argument and a
parallel set of memory_slice(...) targets in assigns(...). For functions dealing with multiple pointers, this quickly bloats and thereby impedes the readability of the CBMC specs.

Introduce two variadic preprocessor macros in mldsa/src/cbmc.h that unfold a list of regions into the corresponding memory_no_alias / memory_slice calls, joined as required by their containing clause:

  requires(disjoint(arg, ...))   -- AND-joined memory_no_alias checks
  assigns(..., slices(arg, ...)) -- comma-joined memory_slice targets

Each arg is either a bare object x (size sizeof(*x)) or a pair (x, N) where N is an element count (size sizeof(*x) * N). The pair form covers byte buffers like uint8_t seed[CRHBYTES] and typed arrays where the count comes from a parameter rather than the type.

Implementation relies on some C99 preprocessor magic.

@hanno-becker hanno-becker added enhancement New feature or request cbmc labels May 12, 2026
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oqs-bot commented May 12, 2026

CBMC Results (ML-DSA-87, REDUCE-RAM)

Full Results (195 proofs)
Proof Status Current Previous Change
**TOTAL** 1418s 1460s -2.9%
poly_pointwise_montgomery_c 163s 157s +4%
mld_invntt_layer 103s 95s +8%
rej_uniform_native 98s 107s -8%
polyvec_matrix_pointwise_montgomery_yvec 79s 122s -35%
mld_ct_memcmp 72s 70s +3%
mld_ntt_layer 41s 41s +0%
sign_verify_internal 31s 40s -22%
fqmul 28s 29s -3%
mld_attempt_signature_generation 24s 24s +0%
keccakf1600x4_permute_native 22s 24s -8%
rej_uniform_c 19s 20s -5%
rej_uniform 18s 18s +0%
mld_check_pct 16s 11s +45%
mld_ntt_butterfly_block 16s 14s +14%
polyeta_unpack 15s 15s +0%
poly_uniform_eta_4x 13s 13s +0%
poly_add 12s 11s +9%
poly_chknorm_c 12s 14s -14%
compute_pack_t0_t1 11s 7s +57%
polyt0_unpack 11s 11s +0%
polyveck_decompose 10s 16s -38%
poly_invntt_tomont_c 9s 9s +0%
polyvec_matrix_pointwise_montgomery_row 9s 10s -10%
keccak_absorb 8s 6s +33%
mld_sample_s1_s2_serial 8s 7s +14%
poly_use_hint_c 8s 4s +100%
polyvecl_ntt 8s 9s -11%
sign 8s 10s -20%
keccak_absorb_once_x4 7s 10s -30%
keccakf1600_permute 7s 6s +17%
mld_sample_s1_s2 7s 4s +75%
sign_verify_extmu 7s 5s +40%
keccakf1600_permute_native 6s 5s +20%
mld_compute_pack_z 6s 5s +20%
poly_caddq_c 6s 6s +0%
poly_shiftl 6s 4s +50%
poly_uniform_gamma1_4x 6s 4s +50%
polyveck_chknorm 6s 6s +0%
polyveck_reduce 6s 8s -25%
polyz_unpack_c 6s 5s +20%
sign_pk_from_sk 6s 6s +0%
sign_signature_extmu 6s 2s +200%
sign_signature_internal 6s 6s +0%
sign_signature_pre_hash_internal 6s 4s +50%
decompose 5s 2s +150%
keccakf1600x4_extract_bytes_native 5s 2s +150%
poly_caddq_native_aarch64 5s 2s +150%
poly_decompose_32_native_aarch64 5s 3s +67%
poly_permute_bitrev_to_custom_optional 5s 2s +150%
poly_pointwise_montgomery_native 5s 3s +67%
poly_uniform_gamma1 5s 4s +25%
polyt0_pack 5s 5s +0%
polyveck_caddq 5s 4s +25%
sign_open 5s 6s -17%
sign_verify_pre_hash_internal 5s 5s +0%
intt_native_x86_64 4s 5s -20%
keccak_squeezeblocks_x4 4s 3s +33%
keccakf1600_extract_bytes (big endian) 4s 1s +300%
keccakf1600x4_permute 4s 3s +33%
keccakf1600x4_xor_bytes_native 4s 3s +33%
mld_ct_abs_i32 4s 3s +33%
mld_ct_sel_int32 4s 1s +300%
mld_polymat_expand_entry 4s 2s +100%
mld_prepare_domain_separation_prefix 4s 3s +33%
mld_value_barrier_u8 4s 2s +100%
ntt_native_aarch64 4s 4s +0%
ntt_native_x86_64 4s 3s +33%
nttunpack_native_x86_64 4s 2s +100%
pointwise_acc_native_x86_64 4s 6s -33%
poly_challenge 4s 5s -20%
poly_decompose_88_native_aarch64 4s 3s +33%
poly_decompose_c 4s 2s +100%
poly_decompose_native 4s 3s +33%
poly_permute_bitrev_to_custom_optional_native 4s 2s +100%
poly_uniform_eta 4s 3s +33%
polyvec_matrix_expand 4s 2s +100%
polyveck_invntt_tomont 4s 6s -33%
polyvecl_chknorm 4s 5s -20%
polyvecl_pack_eta 4s 3s +33%
polyw1_pack 4s 6s -33%
polyz_pack 4s 3s +33%
polyz_unpack 4s 3s +33%
polyz_unpack_19_native_aarch64 4s 4s +0%
power2round 4s 4s +0%
rej_eta_native 4s 4s +0%
shake128_init 4s 3s +33%
shake128x4_absorb_once 4s 3s +33%
sig_unpack_hints 4s 4s +0%
sign_keypair 4s 4s +0%
sign_keypair_internal 4s 4s +0%
sign_signature 4s 5s -20%
sign_signature_pre_hash_shake256 4s 2s +100%
sys_check_capability 4s 2s +100%
unpack_sk_t0hat 4s 5s -20%
use_hint 4s 3s +33%
yvec_get_poly 4s 4s +0%
fqscale 3s 2s +50%
intt_native_aarch64 3s 5s -40%
keccak_f1600_x4_native_aarch64_v8a_scalar_hybrid 3s 2s +50%
keccak_init 3s 3s +0%
mld_ct_get_optblocker_u32 3s 2s +50%
mld_h 3s 3s +0%
mld_keccakf1600_extract_bytes 3s 1s +200%
mld_value_barrier_u32 3s 2s +50%
pack_sig_z 3s 2s +50%
pack_sk_rho_key_tr_s2 3s 3s +0%
pointwise_acc_native_aarch64 3s 6s -50%
poly_caddq_native 3s 5s -40%
poly_chknorm_native 3s 5s -40%
poly_decompose 3s 3s +0%
poly_invntt_tomont 3s 3s +0%
poly_power2round 3s 7s -57%
poly_reduce 3s 4s -25%
poly_uniform 3s 6s -50%
poly_uniform_4x 3s 3s +0%
polyt1_pack 3s 4s -25%
polyt1_unpack 3s 2s +50%
polyveck_unpack_eta 3s 3s +0%
polyvecl_pointwise_acc_montgomery 3s 3s +0%
polyvecl_pointwise_acc_montgomery_c 3s 2s +50%
polyvecl_pointwise_acc_montgomery_native 3s 1s +200%
polyvecl_uniform_gamma1 3s 3s +0%
polyvecl_uniform_gamma1_serial 3s 2s +50%
polyvecl_unpack_eta 3s 6s -50%
polyvecl_unpack_z 3s 6s -50%
polyz_unpack_native 3s 3s +0%
rej_eta 3s 1s +200%
rej_eta_c 3s 5s -40%
shake128_absorb 3s 2s +50%
shake128_squeeze 3s 3s +0%
shake256 3s 3s +0%
shake256_absorb 3s 2s +50%
shake256_finalize 3s 3s +0%
shake256_init 3s 2s +50%
shake256x4_squeezeblocks 3s 3s +0%
sk_s1hat_get_poly 3s 2s +50%
sk_s2hat_get_poly 3s 4s -25%
sk_t0hat_get_poly 3s 3s +0%
unpack_sk 3s 2s +50%
yvec_init 3s 2s +50%
caddq 2s 2s +0%
keccak_f1600_x1_native_aarch64_v84a 2s 2s +0%
keccak_f1600_x4_native_aarch64_v84a 2s 3s -33%
keccak_f1600_x4_native_aarch64_v8a_v84a_scalar_hybrid 2s 3s -33%
keccak_f1600_x4_native_avx2 2s 4s -50%
keccak_finalize 2s 1s +100%
keccak_squeeze 2s 4s -50%
keccakf1600_xor_bytes 2s 2s +0%
keccakf1600_xor_bytes (big endian) 2s 2s +0%
keccakf1600x4_xor_bytes 2s 5s -60%
make_hint 2s 2s +0%
mld_ct_cmask_neg_i32 2s 3s -33%
mld_ct_cmask_nonzero_u8 2s 2s +0%
mld_ct_get_optblocker_i64 2s 2s +0%
mld_ct_get_optblocker_u8 2s 2s +0%
pack_sig_c 2s 3s -33%
pack_sk_s1 2s 1s +100%
pointwise_native_aarch64 2s 3s -33%
pointwise_native_x86_64 2s 2s +0%
poly_caddq 2s 4s -50%
poly_chknorm 2s 3s -33%
poly_chknorm_native_aarch64 2s 3s -33%
poly_invntt_tomont_native 2s 2s +0%
poly_ntt_native 2s 2s +0%
poly_pointwise_montgomery 2s 2s +0%
poly_sub 2s 5s -60%
poly_use_hint_native 2s 3s -33%
poly_use_hint_native_aarch64 2s 4s -50%
polyvec_matrix_expand_serial 2s 3s -33%
polyveck_pack_eta 2s 3s -33%
polyveck_pack_w1 2s 2s +0%
polyz_unpack_17_native_aarch64 2s 3s -33%
reduce32 2s 2s +0%
shake128x4_squeezeblocks 2s 3s -33%
shake256_release 2s 2s +0%
shake256_squeeze 2s 2s +0%
sign_verify 2s 3s -33%
sign_verify_pre_hash_shake256 2s 4s -50%
unpack_sk_s1hat 2s 1s +100%
unpack_sk_s2hat 2s 3s -33%
keccak_f1600_x1_native_aarch64 1s 1s +0%
keccakf1600x4_extract_bytes 1s 3s -67%
mld_ct_cmask_nonzero_u32 1s 2s -50%
mld_value_barrier_i64 1s 1s +0%
montgomery_reduce 1s 5s -80%
pack_sig_h 1s 3s -67%
poly_ntt 1s 2s -50%
poly_ntt_c 1s 3s -67%
poly_use_hint 1s 3s -67%
polyeta_pack 1s 2s -50%
polyveck_ntt 1s 2s -50%
shake128_finalize 1s 2s -50%
shake128_release 1s 4s -75%
shake256x4_absorb_once 1s 2s -50%
unpack_pk_t1 1s 3s -67%

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oqs-bot commented May 12, 2026

CBMC Results (ML-DSA-44, REDUCE-RAM)

Full Results (195 proofs)
Proof Status Current Previous Change
**TOTAL** 1416s 1443s -1.9%
poly_pointwise_montgomery_c 166s 176s -6%
rej_uniform_native 100s 108s -7%
mld_invntt_layer 99s 106s -7%
polyvec_matrix_pointwise_montgomery_yvec 89s 88s +1%
mld_ct_memcmp 73s 76s -4%
mld_ntt_layer 43s 45s -4%
fqmul 29s 28s +4%
mld_attempt_signature_generation 26s 26s +0%
keccakf1600x4_permute_native 25s 23s +9%
rej_uniform 20s 20s +0%
sign_verify_internal 17s 21s -19%
mld_ntt_butterfly_block 16s 19s -16%
polyeta_unpack 16s 16s +0%
rej_uniform_c 16s 18s -11%
poly_uniform_eta_4x 14s 11s +27%
poly_add 13s 10s +30%
poly_chknorm_c 13s 14s -7%
polyt0_unpack 12s 10s +20%
polyz_unpack_c 12s 14s -14%
mld_check_pct 11s 15s -27%
keccak_absorb_once_x4 10s 11s -9%
polyveck_chknorm 10s 12s -17%
poly_decompose_c 9s 9s +0%
mld_compute_pack_z 8s 6s +33%
poly_caddq_c 8s 7s +14%
poly_invntt_tomont_c 8s 8s +0%
keccak_absorb 7s 9s -22%
poly_shiftl 7s 4s +75%
polyvecl_chknorm 7s 5s +40%
compute_pack_t0_t1 6s 7s -14%
decompose 6s 5s +20%
keccakf1600_permute_native 6s 7s -14%
keccakf1600x4_xor_bytes_native 6s 4s +50%
mld_prepare_domain_separation_prefix 6s 3s +100%
polyvec_matrix_pointwise_montgomery_row 6s 8s -25%
polyveck_reduce 6s 6s +0%
sign_open 6s 4s +50%
sign_signature_internal 6s 4s +50%
caddq 5s 2s +150%
keccakf1600_permute 5s 8s -38%
nttunpack_native_x86_64 5s 2s +150%
poly_caddq_native 5s 3s +67%
poly_chknorm_native 5s 6s -17%
poly_chknorm_native_aarch64 5s 4s +25%
poly_permute_bitrev_to_custom_optional 5s 1s +400%
poly_use_hint_native_aarch64 5s 1s +400%
polyt0_pack 5s 4s +25%
polyt1_pack 5s 7s -29%
polyveck_decompose 5s 5s +0%
polyvecl_ntt 5s 3s +67%
polyvecl_pack_eta 5s 2s +150%
polyz_pack 5s 3s +67%
shake128_init 5s 3s +67%
sign 5s 6s -17%
sign_signature_pre_hash_shake256 5s 5s +0%
intt_native_x86_64 4s 4s +0%
keccak_f1600_x4_native_aarch64_v8a_v84a_scalar_hybrid 4s 3s +33%
keccak_init 4s 2s +100%
keccak_squeezeblocks_x4 4s 5s -20%
keccakf1600_xor_bytes 4s 2s +100%
keccakf1600x4_extract_bytes_native 4s 2s +100%
mld_ct_get_optblocker_i64 4s 3s +33%
poly_challenge 4s 4s +0%
poly_decompose 4s 1s +300%
poly_decompose_32_native_aarch64 4s 3s +33%
poly_ntt 4s 2s +100%
poly_ntt_c 4s 3s +33%
poly_ntt_native 4s 3s +33%
poly_permute_bitrev_to_custom_optional_native 4s 3s +33%
poly_power2round 4s 6s -33%
poly_uniform_eta 4s 4s +0%
poly_use_hint_native 4s 2s +100%
polyveck_caddq 4s 4s +0%
polyveck_ntt 4s 5s -20%
polyvecl_pointwise_acc_montgomery_native 4s 5s -20%
polyvecl_uniform_gamma1_serial 4s 3s +33%
polyz_unpack_19_native_aarch64 4s 2s +100%
power2round 4s 3s +33%
rej_eta_c 4s 3s +33%
shake256_release 4s 3s +33%
shake256x4_absorb_once 4s 4s +0%
sig_unpack_hints 4s 2s +100%
sign_signature_extmu 4s 3s +33%
sign_verify_pre_hash_internal 4s 4s +0%
unpack_sk_s2hat 4s 2s +100%
yvec_get_poly 4s 3s +33%
fqscale 3s 1s +200%
intt_native_aarch64 3s 3s +0%
keccak_f1600_x4_native_aarch64_v84a 3s 2s +50%
keccak_f1600_x4_native_avx2 3s 1s +200%
keccak_squeeze 3s 1s +200%
keccakf1600_extract_bytes (big endian) 3s 4s -25%
keccakf1600_xor_bytes (big endian) 3s 2s +50%
keccakf1600x4_permute 3s 2s +50%
mld_ct_abs_i32 3s 2s +50%
mld_ct_cmask_nonzero_u8 3s 3s +0%
mld_ct_get_optblocker_u32 3s 1s +200%
mld_ct_sel_int32 3s 2s +50%
mld_h 3s 3s +0%
mld_sample_s1_s2_serial 3s 4s -25%
montgomery_reduce 3s 4s -25%
ntt_native_aarch64 3s 3s +0%
pack_sig_c 3s 4s -25%
pack_sig_z 3s 3s +0%
pointwise_acc_native_aarch64 3s 5s -40%
pointwise_acc_native_x86_64 3s 5s -40%
pointwise_native_aarch64 3s 3s +0%
pointwise_native_x86_64 3s 2s +50%
poly_caddq_native_aarch64 3s 3s +0%
poly_decompose_88_native_aarch64 3s 4s -25%
poly_pointwise_montgomery 3s 1s +200%
poly_reduce 3s 2s +50%
poly_sub 3s 2s +50%
poly_uniform 3s 4s -25%
poly_uniform_4x 3s 3s +0%
poly_uniform_gamma1_4x 3s 3s +0%
polyt1_unpack 3s 3s +0%
polyvec_matrix_expand 3s 5s -40%
polyvec_matrix_expand_serial 3s 3s +0%
polyveck_invntt_tomont 3s 5s -40%
polyveck_pack_eta 3s 2s +50%
polyveck_pack_w1 3s 5s -40%
polyvecl_pointwise_acc_montgomery_c 3s 2s +50%
polyvecl_uniform_gamma1 3s 4s -25%
polyvecl_unpack_eta 3s 1s +200%
polyw1_pack 3s 3s +0%
polyz_unpack 3s 3s +0%
polyz_unpack_17_native_aarch64 3s 4s -25%
shake128_absorb 3s 3s +0%
shake128_finalize 3s 3s +0%
shake128x4_absorb_once 3s 2s +50%
shake128x4_squeezeblocks 3s 3s +0%
shake256 3s 2s +50%
shake256_absorb 3s 2s +50%
shake256_finalize 3s 4s -25%
shake256x4_squeezeblocks 3s 2s +50%
sign_keypair 3s 2s +50%
sign_keypair_internal 3s 2s +50%
sign_pk_from_sk 3s 6s -50%
sign_signature_pre_hash_internal 3s 3s +0%
sign_verify 3s 3s +0%
sign_verify_extmu 3s 3s +0%
sign_verify_pre_hash_shake256 3s 4s -25%
unpack_sk 3s 2s +50%
unpack_sk_t0hat 3s 4s -25%
yvec_init 3s 5s -40%
keccak_f1600_x4_native_aarch64_v8a_scalar_hybrid 2s 3s -33%
keccak_finalize 2s 2s +0%
keccakf1600x4_extract_bytes 2s 4s -50%
keccakf1600x4_xor_bytes 2s 3s -33%
make_hint 2s 2s +0%
mld_ct_cmask_neg_i32 2s 2s +0%
mld_ct_cmask_nonzero_u32 2s 2s +0%
mld_keccakf1600_extract_bytes 2s 1s +100%
mld_polymat_expand_entry 2s 3s -33%
mld_sample_s1_s2 2s 3s -33%
mld_value_barrier_i64 2s 3s -33%
mld_value_barrier_u32 2s 3s -33%
mld_value_barrier_u8 2s 2s +0%
ntt_native_x86_64 2s 5s -60%
pack_sig_h 2s 5s -60%
pack_sk_rho_key_tr_s2 2s 4s -50%
pack_sk_s1 2s 3s -33%
poly_caddq 2s 3s -33%
poly_chknorm 2s 3s -33%
poly_decompose_native 2s 2s +0%
poly_invntt_tomont 2s 4s -50%
poly_invntt_tomont_native 2s 3s -33%
poly_pointwise_montgomery_native 2s 5s -60%
poly_uniform_gamma1 2s 2s +0%
poly_use_hint 2s 4s -50%
poly_use_hint_c 2s 3s -33%
polyeta_pack 2s 2s +0%
polyveck_unpack_eta 2s 3s -33%
polyz_unpack_native 2s 4s -50%
reduce32 2s 3s -33%
rej_eta_native 2s 2s +0%
shake256_init 2s 2s +0%
shake256_squeeze 2s 2s +0%
sign_signature 2s 6s -67%
sk_s1hat_get_poly 2s 2s +0%
sk_s2hat_get_poly 2s 4s -50%
sk_t0hat_get_poly 2s 2s +0%
unpack_pk_t1 2s 1s +100%
unpack_sk_s1hat 2s 4s -50%
use_hint 2s 4s -50%
keccak_f1600_x1_native_aarch64 1s 1s +0%
keccak_f1600_x1_native_aarch64_v84a 1s 3s -67%
mld_ct_get_optblocker_u8 1s 1s +0%
polyvecl_pointwise_acc_montgomery 1s 2s -50%
polyvecl_unpack_z 1s 2s -50%
rej_eta 1s 4s -75%
shake128_release 1s 3s -67%
shake128_squeeze 1s 2s -50%
sys_check_capability 1s 2s -50%

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oqs-bot commented May 12, 2026

CBMC Results (ML-DSA-87)

⚠️ Attention Required

Proof Status Current Previous Change
polyvec_matrix_expand_serial ⚠️ 67s 36s +86%
Full Results (195 proofs)
Proof Status Current Previous Change
**TOTAL** 2142s 1958s +9.4%
polyvecl_pointwise_acc_montgomery_c 286s 237s +21%
polyvec_matrix_expand 210s 165s +27%
rej_uniform_native 150s 122s +23%
poly_pointwise_montgomery_c 107s 93s +15%
mld_invntt_layer 99s 87s +14%
mld_attempt_signature_generation 98s 102s -4%
mld_ct_memcmp 84s 76s +11%
polyvec_matrix_expand_serial ⚠️ 67s 36s +86%
sign_verify_internal 57s 56s +2%
mld_ntt_layer 46s 44s +5%
sign_signature_internal 39s 54s -28%
fqmul 32s 27s +19%
keccakf1600x4_permute_native 24s 22s +9%
polyvec_matrix_pointwise_montgomery_yvec 22s 22s +0%
compute_pack_t0_t1 21s 23s -9%
polyt0_unpack 19s 13s +46%
rej_uniform_c 19s 20s -5%
poly_chknorm_c 18s 16s +12%
rej_uniform 18s 16s +12%
mld_ntt_butterfly_block 16s 17s -6%
mld_check_pct 15s 14s +7%
polyeta_unpack 13s 12s +8%
poly_add 12s 11s +9%
poly_uniform_eta_4x 12s 15s -20%
polyveck_decompose 12s 11s +9%
poly_uniform_4x 11s 13s -15%
polyveck_caddq 11s 8s +38%
polyveck_ntt 11s 12s -8%
keccak_absorb_once_x4 10s 10s +0%
sign 10s 9s +11%
mld_compute_pack_z 9s 9s +0%
sign_pk_from_sk 9s 7s +29%
keccakf1600_permute_native 8s 10s -20%
poly_invntt_tomont_c 8s 9s -11%
polyveck_invntt_tomont 8s 7s +14%
polyz_unpack_c 8s 6s +33%
keccak_absorb 7s 7s +0%
keccakf1600_permute 7s 7s +0%
mld_sample_s1_s2_serial 7s 4s +75%
mld_value_barrier_u32 7s 3s +133%
poly_decompose_c 7s 5s +40%
keccak_squeeze 6s 3s +100%
keccak_squeezeblocks_x4 6s 7s -14%
mld_sample_s1_s2 6s 6s +0%
poly_decompose_native 6s 3s +100%
poly_power2round 6s 8s -25%
polyvecl_ntt 6s 6s +0%
unpack_sk 6s 3s +100%
make_hint 5s 3s +67%
mld_ct_sel_int32 5s 3s +67%
mld_h 5s 3s +67%
pack_sig_h 5s 5s +0%
poly_challenge 5s 5s +0%
poly_invntt_tomont_native 5s 4s +25%
poly_ntt 5s 4s +25%
poly_sub 5s 1s +400%
poly_uniform 5s 5s +0%
poly_uniform_eta 5s 5s +0%
poly_uniform_gamma1_4x 5s 6s -17%
polyeta_pack 5s 4s +25%
polyveck_chknorm 5s 5s +0%
polyveck_unpack_eta 5s 3s +67%
polyvecl_pack_eta 5s 2s +150%
polyvecl_pointwise_acc_montgomery_native 5s 4s +25%
polyz_unpack_17_native_aarch64 5s 2s +150%
shake256_absorb 5s 2s +150%
shake256_finalize 5s 2s +150%
sign_verify 5s 7s -29%
sk_s2hat_get_poly 5s 3s +67%
unpack_sk_t0hat 5s 5s +0%
keccak_f1600_x1_native_aarch64_v84a 4s 3s +33%
keccak_f1600_x4_native_aarch64_v8a_v84a_scalar_hybrid 4s 2s +100%
mld_ct_get_optblocker_u8 4s 4s +0%
mld_prepare_domain_separation_prefix 4s 4s +0%
pack_sig_z 4s 2s +100%
pointwise_acc_native_aarch64 4s 10s -60%
pointwise_native_aarch64 4s 3s +33%
pointwise_native_x86_64 4s 3s +33%
poly_caddq 4s 4s +0%
poly_caddq_c 4s 6s -33%
poly_chknorm 4s 3s +33%
poly_decompose 4s 3s +33%
poly_pointwise_montgomery 4s 4s +0%
poly_use_hint_c 4s 3s +33%
polyvec_matrix_pointwise_montgomery_row 4s 2s +100%
polyvecl_uniform_gamma1_serial 4s 3s +33%
polyvecl_unpack_eta 4s 5s -20%
polyvecl_unpack_z 4s 3s +33%
polyw1_pack 4s 5s -20%
polyz_unpack 4s 3s +33%
polyz_unpack_19_native_aarch64 4s 3s +33%
rej_eta_c 4s 4s +0%
rej_eta_native 4s 4s +0%
sign_keypair 4s 5s -20%
sign_keypair_internal 4s 5s -20%
sign_signature_extmu 4s 3s +33%
sign_signature_pre_hash_shake256 4s 3s +33%
sign_verify_extmu 4s 3s +33%
sign_verify_pre_hash_internal 4s 4s +0%
sign_verify_pre_hash_shake256 4s 4s +0%
unpack_sk_s2hat 4s 3s +33%
fqscale 3s 1s +200%
intt_native_aarch64 3s 6s -50%
intt_native_x86_64 3s 2s +50%
keccak_f1600_x1_native_aarch64 3s 3s +0%
keccak_f1600_x4_native_aarch64_v84a 3s 2s +50%
keccak_f1600_x4_native_aarch64_v8a_scalar_hybrid 3s 1s +200%
keccak_finalize 3s 3s +0%
keccakf1600_xor_bytes (big endian) 3s 2s +50%
keccakf1600x4_extract_bytes 3s 2s +50%
keccakf1600x4_extract_bytes_native 3s 3s +0%
keccakf1600x4_xor_bytes_native 3s 5s -40%
mld_ct_cmask_neg_i32 3s 2s +50%
mld_ct_get_optblocker_u32 3s 1s +200%
mld_polymat_expand_entry 3s 2s +50%
mld_value_barrier_i64 3s 2s +50%
mld_value_barrier_u8 3s 6s -50%
montgomery_reduce 3s 3s +0%
ntt_native_aarch64 3s 3s +0%
ntt_native_x86_64 3s 4s -25%
nttunpack_native_x86_64 3s 2s +50%
pack_sig_c 3s 1s +200%
pack_sk_rho_key_tr_s2 3s 4s -25%
pointwise_acc_native_x86_64 3s 8s -62%
poly_caddq_native 3s 4s -25%
poly_invntt_tomont 3s 2s +50%
poly_permute_bitrev_to_custom_optional_native 3s 4s -25%
poly_pointwise_montgomery_native 3s 3s +0%
poly_reduce 3s 3s +0%
poly_shiftl 3s 4s -25%
polyt0_pack 3s 5s -40%
polyt1_unpack 3s 3s +0%
polyveck_pack_eta 3s 3s +0%
polyveck_pack_w1 3s 4s -25%
polyvecl_chknorm 3s 4s -25%
polyvecl_uniform_gamma1 3s 3s +0%
polyz_pack 3s 2s +50%
power2round 3s 4s -25%
rej_eta 3s 3s +0%
shake128_absorb 3s 3s +0%
shake128_finalize 3s 1s +200%
shake128x4_squeezeblocks 3s 2s +50%
shake256_release 3s 2s +50%
shake256x4_absorb_once 3s 3s +0%
shake256x4_squeezeblocks 3s 3s +0%
sig_unpack_hints 3s 3s +0%
sign_open 3s 6s -50%
sign_signature_pre_hash_internal 3s 6s -50%
sk_t0hat_get_poly 3s 2s +50%
sys_check_capability 3s 2s +50%
unpack_sk_s1hat 3s 2s +50%
yvec_get_poly 3s 3s +0%
caddq 2s 3s -33%
decompose 2s 5s -60%
keccak_f1600_x4_native_avx2 2s 2s +0%
keccak_init 2s 2s +0%
keccakf1600_xor_bytes 2s 5s -60%
keccakf1600x4_permute 2s 4s -50%
keccakf1600x4_xor_bytes 2s 2s +0%
mld_ct_cmask_nonzero_u32 2s 4s -50%
mld_ct_cmask_nonzero_u8 2s 2s +0%
mld_ct_get_optblocker_i64 2s 1s +100%
mld_keccakf1600_extract_bytes 2s 2s +0%
pack_sk_s1 2s 3s -33%
poly_caddq_native_aarch64 2s 5s -60%
poly_chknorm_native 2s 3s -33%
poly_chknorm_native_aarch64 2s 4s -50%
poly_decompose_32_native_aarch64 2s 1s +100%
poly_decompose_88_native_aarch64 2s 3s -33%
poly_ntt_c 2s 2s +0%
poly_ntt_native 2s 5s -60%
poly_permute_bitrev_to_custom_optional 2s 3s -33%
poly_uniform_gamma1 2s 2s +0%
poly_use_hint 2s 4s -50%
poly_use_hint_native 2s 3s -33%
poly_use_hint_native_aarch64 2s 2s +0%
polyt1_pack 2s 3s -33%
polyveck_reduce 2s 6s -67%
polyvecl_pointwise_acc_montgomery 2s 6s -67%
polyz_unpack_native 2s 2s +0%
shake128_init 2s 1s +100%
shake128_squeeze 2s 2s +0%
shake256_init 2s 3s -33%
sign_signature 2s 3s -33%
sk_s1hat_get_poly 2s 2s +0%
unpack_pk_t1 2s 2s +0%
use_hint 2s 3s -33%
yvec_init 2s 3s -33%
keccakf1600_extract_bytes (big endian) 1s 3s -67%
mld_ct_abs_i32 1s 4s -75%
reduce32 1s 4s -75%
shake128_release 1s 1s +0%
shake128x4_absorb_once 1s 3s -67%
shake256 1s 2s -50%
shake256_squeeze 1s 4s -75%

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oqs-bot commented May 12, 2026

CBMC Results (ML-DSA-65, REDUCE-RAM)

⚠️ Attention Required

Proof Status Current Previous Change
polyvec_matrix_pointwise_montgomery_yvec ⚠️ 299s 149s +101%
Full Results (195 proofs)
Proof Status Current Previous Change
**TOTAL** 1678s 1496s +12.2%
polyvec_matrix_pointwise_montgomery_yvec ⚠️ 299s 149s +101%
poly_pointwise_montgomery_c 178s 167s +7%
rej_uniform_native 108s 106s +2%
mld_invntt_layer 104s 101s +3%
mld_ct_memcmp 73s 75s -3%
mld_ntt_layer 42s 44s -5%
fqmul 28s 28s +0%
keccakf1600x4_permute_native 24s 23s +4%
mld_attempt_signature_generation 22s 27s -19%
polyvecl_chknorm 20s 19s +5%
rej_uniform 20s 18s +11%
rej_uniform_c 20s 19s +5%
sign_verify_internal 19s 18s +6%
mld_check_pct 18s 14s +29%
mld_ntt_butterfly_block 15s 17s -12%
poly_chknorm_c 15s 14s +7%
poly_uniform_eta_4x 13s 11s +18%
polyveck_decompose 13s 14s -7%
poly_add 11s 13s -15%
polyt0_unpack 11s 10s +10%
polyvec_matrix_pointwise_montgomery_row 11s 10s +10%
sign 10s 7s +43%
poly_invntt_tomont_c 9s 7s +29%
keccak_absorb_once_x4 8s 9s -11%
keccakf1600_permute_native 8s 7s +14%
keccak_absorb 7s 7s +0%
mld_sample_s1_s2 7s 5s +40%
polyveck_caddq 7s 8s -12%
polyvecl_ntt 7s 6s +17%
sign_open 7s 4s +75%
compute_pack_t0_t1 6s 9s -33%
keccakf1600_permute 6s 6s +0%
mld_prepare_domain_separation_prefix 6s 4s +50%
poly_caddq_c 6s 7s -14%
poly_decompose_32_native_aarch64 6s 4s +50%
poly_shiftl 6s 8s -25%
polyveck_chknorm 6s 3s +100%
polyveck_invntt_tomont 6s 5s +20%
polyveck_pack_w1 6s 3s +100%
polyveck_reduce 6s 8s -25%
polyz_unpack_c 6s 6s +0%
shake128x4_absorb_once 6s 2s +200%
sign_pk_from_sk 6s 5s +20%
sign_signature 6s 3s +100%
sign_signature_extmu 6s 4s +50%
sign_signature_internal 6s 7s -14%
unpack_sk 6s 5s +20%
keccak_squeezeblocks_x4 5s 4s +25%
keccakf1600x4_xor_bytes_native 5s 5s +0%
mld_compute_pack_z 5s 5s +0%
mld_h 5s 2s +150%
pointwise_native_aarch64 5s 4s +25%
poly_caddq_native_aarch64 5s 3s +67%
poly_challenge 5s 4s +25%
poly_chknorm 5s 4s +25%
poly_chknorm_native 5s 4s +25%
poly_chknorm_native_aarch64 5s 2s +150%
poly_power2round 5s 7s -29%
polyveck_pack_eta 5s 2s +150%
polyz_unpack_native 5s 2s +150%
sign_keypair_internal 5s 3s +67%
unpack_sk_s1hat 5s 2s +150%
unpack_sk_s2hat 5s 3s +67%
decompose 4s 4s +0%
keccak_f1600_x4_native_aarch64_v84a 4s 4s +0%
keccak_f1600_x4_native_aarch64_v8a_scalar_hybrid 4s 4s +0%
keccak_f1600_x4_native_avx2 4s 4s +0%
keccak_squeeze 4s 3s +33%
keccakf1600x4_xor_bytes 4s 2s +100%
mld_ct_abs_i32 4s 4s +0%
mld_keccakf1600_extract_bytes 4s 3s +33%
mld_sample_s1_s2_serial 4s 5s -20%
mld_value_barrier_u32 4s 2s +100%
ntt_native_aarch64 4s 1s +300%
ntt_native_x86_64 4s 3s +33%
pack_sk_rho_key_tr_s2 4s 2s +100%
pointwise_native_x86_64 4s 4s +0%
poly_decompose 4s 2s +100%
poly_decompose_c 4s 4s +0%
poly_invntt_tomont_native 4s 3s +33%
poly_pointwise_montgomery 4s 3s +33%
poly_uniform 4s 4s +0%
poly_use_hint 4s 4s +0%
poly_use_hint_c 4s 5s -20%
poly_use_hint_native 4s 1s +300%
polyt0_pack 4s 3s +33%
polyveck_ntt 4s 2s +100%
polyz_unpack_19_native_aarch64 4s 3s +33%
rej_eta_c 4s 3s +33%
sign_signature_pre_hash_shake256 4s 6s -33%
sign_verify_pre_hash_internal 4s 3s +33%
sk_s1hat_get_poly 4s 3s +33%
sys_check_capability 4s 4s +0%
intt_native_x86_64 3s 3s +0%
keccak_f1600_x1_native_aarch64 3s 2s +50%
keccak_finalize 3s 3s +0%
keccakf1600_extract_bytes (big endian) 3s 3s +0%
keccakf1600_xor_bytes (big endian) 3s 2s +50%
keccakf1600x4_extract_bytes_native 3s 4s -25%
keccakf1600x4_permute 3s 2s +50%
make_hint 3s 2s +50%
mld_ct_cmask_nonzero_u32 3s 2s +50%
mld_ct_get_optblocker_i64 3s 2s +50%
mld_polymat_expand_entry 3s 2s +50%
pack_sig_c 3s 2s +50%
pack_sk_s1 3s 3s +0%
pointwise_acc_native_x86_64 3s 6s -50%
poly_decompose_88_native_aarch64 3s 3s +0%
poly_decompose_native 3s 5s -40%
poly_ntt 3s 4s -25%
poly_permute_bitrev_to_custom_optional_native 3s 2s +50%
poly_pointwise_montgomery_native 3s 2s +50%
poly_reduce 3s 5s -40%
poly_sub 3s 4s -25%
poly_uniform_eta 3s 8s -62%
poly_uniform_gamma1 3s 4s -25%
poly_use_hint_native_aarch64 3s 2s +50%
polyeta_unpack 3s 2s +50%
polyt1_unpack 3s 2s +50%
polyvec_matrix_expand 3s 4s -25%
polyvec_matrix_expand_serial 3s 2s +50%
polyvecl_pack_eta 3s 3s +0%
polyvecl_pointwise_acc_montgomery_c 3s 2s +50%
polyvecl_pointwise_acc_montgomery_native 3s 3s +0%
polyvecl_uniform_gamma1_serial 3s 3s +0%
polyz_pack 3s 5s -40%
polyz_unpack 3s 3s +0%
power2round 3s 3s +0%
rej_eta 3s 2s +50%
rej_eta_native 3s 4s -25%
shake128_squeeze 3s 1s +200%
shake256 3s 1s +200%
shake256_init 3s 3s +0%
sign_keypair 3s 3s +0%
sign_verify 3s 4s -25%
sign_verify_extmu 3s 4s -25%
sign_verify_pre_hash_shake256 3s 4s -25%
sk_t0hat_get_poly 3s 2s +50%
unpack_pk_t1 3s 2s +50%
yvec_init 3s 2s +50%
caddq 2s 3s -33%
fqscale 2s 5s -60%
intt_native_aarch64 2s 2s +0%
keccak_f1600_x1_native_aarch64_v84a 2s 3s -33%
keccak_f1600_x4_native_aarch64_v8a_v84a_scalar_hybrid 2s 1s +100%
keccak_init 2s 4s -50%
keccakf1600_xor_bytes 2s 4s -50%
keccakf1600x4_extract_bytes 2s 3s -33%
mld_ct_cmask_neg_i32 2s 1s +100%
mld_ct_cmask_nonzero_u8 2s 2s +0%
mld_ct_get_optblocker_u32 2s 2s +0%
mld_ct_get_optblocker_u8 2s 1s +100%
mld_ct_sel_int32 2s 2s +0%
mld_value_barrier_i64 2s 2s +0%
mld_value_barrier_u8 2s 1s +100%
nttunpack_native_x86_64 2s 4s -50%
pack_sig_h 2s 2s +0%
pack_sig_z 2s 2s +0%
pointwise_acc_native_aarch64 2s 3s -33%
poly_caddq 2s 2s +0%
poly_caddq_native 2s 5s -60%
poly_invntt_tomont 2s 1s +100%
poly_ntt_c 2s 4s -50%
poly_ntt_native 2s 4s -50%
poly_permute_bitrev_to_custom_optional 2s 3s -33%
poly_uniform_4x 2s 3s -33%
poly_uniform_gamma1_4x 2s 6s -67%
polyeta_pack 2s 3s -33%
polyt1_pack 2s 4s -50%
polyveck_unpack_eta 2s 3s -33%
polyvecl_pointwise_acc_montgomery 2s 3s -33%
polyvecl_uniform_gamma1 2s 3s -33%
polyw1_pack 2s 2s +0%
polyz_unpack_17_native_aarch64 2s 4s -50%
reduce32 2s 3s -33%
shake128_absorb 2s 2s +0%
shake128_init 2s 3s -33%
shake128_release 2s 2s +0%
shake256_release 2s 2s +0%
shake256_squeeze 2s 4s -50%
shake256x4_absorb_once 2s 3s -33%
shake256x4_squeezeblocks 2s 6s -67%
sig_unpack_hints 2s 2s +0%
sign_signature_pre_hash_internal 2s 3s -33%
unpack_sk_t0hat 2s 1s +100%
use_hint 2s 4s -50%
montgomery_reduce 1s 4s -75%
polyvecl_unpack_eta 1s 2s -50%
polyvecl_unpack_z 1s 3s -67%
shake128_finalize 1s 1s +0%
shake128x4_squeezeblocks 1s 4s -75%
shake256_absorb 1s 2s -50%
shake256_finalize 1s 2s -50%
sk_s2hat_get_poly 1s 3s -67%
yvec_get_poly 1s 2s -50%

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oqs-bot commented May 12, 2026

CBMC Results (ML-DSA-65)

Full Results (195 proofs)
Proof Status Current Previous Change
**TOTAL** 1981s 1912s +3.6%
polyvecl_pointwise_acc_montgomery_c 314s 286s +10%
polyvec_matrix_expand 162s 146s +11%
rej_uniform_native 150s 124s +21%
mld_invntt_layer 100s 93s +8%
poly_pointwise_montgomery_c 100s 95s +5%
mld_ct_memcmp 80s 73s +10%
mld_attempt_signature_generation 51s 71s -28%
sign_verify_internal 47s 55s -15%
mld_ntt_layer 46s 42s +10%
sign_signature_internal 37s 45s -18%
fqmul 32s 28s +14%
polyvec_matrix_expand_serial 29s 25s +16%
keccakf1600x4_permute_native 22s 23s -4%
polyvec_matrix_pointwise_montgomery_yvec 20s 29s -31%
rej_uniform_c 19s 21s -10%
mld_ntt_butterfly_block 17s 16s +6%
rej_uniform 17s 16s +6%
poly_chknorm_c 15s 17s -12%
polyt0_unpack 15s 15s +0%
poly_add 14s 11s +27%
mld_check_pct 13s 13s +0%
poly_uniform_eta_4x 12s 13s -8%
compute_pack_t0_t1 11s 13s -15%
polyveck_chknorm 11s 10s +10%
polyveck_decompose 11s 14s -21%
poly_invntt_tomont_c 10s 10s +0%
poly_uniform_4x 10s 10s +0%
polyvecl_ntt 10s 8s +25%
keccak_absorb_once_x4 9s 9s +0%
sign 9s 7s +29%
keccakf1600_permute_native 8s 9s -11%
mld_compute_pack_z 8s 9s -11%
polyveck_caddq 8s 7s +14%
polyveck_invntt_tomont 8s 9s -11%
polyveck_ntt 8s 7s +14%
keccakf1600_permute 7s 9s -22%
poly_power2round 7s 8s -12%
sign_open 7s 4s +75%
keccak_absorb 6s 8s -25%
keccakf1600x4_permute 6s 3s +100%
ntt_native_aarch64 6s 4s +50%
poly_challenge 6s 3s +100%
poly_shiftl 6s 6s +0%
polyvecl_chknorm 6s 3s +100%
sign_keypair_internal 6s 5s +20%
sign_pk_from_sk 6s 5s +20%
fqscale 5s 2s +150%
keccakf1600x4_xor_bytes_native 5s 4s +25%
mld_prepare_domain_separation_prefix 5s 3s +67%
mld_sample_s1_s2 5s 3s +67%
nttunpack_native_x86_64 5s 4s +25%
poly_invntt_tomont 5s 4s +25%
poly_use_hint_native_aarch64 5s 4s +25%
polyveck_pack_w1 5s 3s +67%
polyvecl_uniform_gamma1_serial 5s 3s +67%
polyz_pack 5s 3s +67%
polyz_unpack_17_native_aarch64 5s 4s +25%
power2round 5s 3s +67%
rej_eta 5s 4s +25%
shake256x4_absorb_once 5s 2s +150%
sign_keypair 5s 5s +0%
sign_signature_extmu 5s 5s +0%
sign_verify_pre_hash_internal 5s 6s -17%
sign_verify_pre_hash_shake256 5s 3s +67%
unpack_sk 5s 3s +67%
intt_native_x86_64 4s 3s +33%
keccak_init 4s 4s +0%
keccak_squeezeblocks_x4 4s 4s +0%
keccakf1600x4_extract_bytes_native 4s 2s +100%
mld_sample_s1_s2_serial 4s 6s -33%
mld_value_barrier_u32 4s 4s +0%
pack_sig_z 4s 2s +100%
pointwise_acc_native_x86_64 4s 7s -43%
pointwise_native_aarch64 4s 1s +300%
pointwise_native_x86_64 4s 4s +0%
poly_caddq_c 4s 4s +0%
poly_caddq_native 4s 2s +100%
poly_chknorm 4s 1s +300%
poly_chknorm_native 4s 4s +0%
poly_decompose_88_native_aarch64 4s 4s +0%
poly_decompose_c 4s 6s -33%
poly_invntt_tomont_native 4s 2s +100%
poly_ntt 4s 4s +0%
poly_ntt_native 4s 2s +100%
poly_permute_bitrev_to_custom_optional 4s 3s +33%
poly_reduce 4s 4s +0%
poly_uniform_gamma1 4s 3s +33%
poly_use_hint_native 4s 2s +100%
polyeta_unpack 4s 5s -20%
polyt0_pack 4s 3s +33%
polyvecl_pack_eta 4s 2s +100%
polyvecl_uniform_gamma1 4s 3s +33%
polyw1_pack 4s 3s +33%
polyz_unpack_19_native_aarch64 4s 2s +100%
shake128_absorb 4s 4s +0%
shake256_init 4s 3s +33%
shake256_squeeze 4s 4s +0%
sign_signature_pre_hash_shake256 4s 4s +0%
sign_verify 4s 4s +0%
sign_verify_extmu 4s 6s -33%
unpack_pk_t1 4s 3s +33%
unpack_sk_t0hat 4s 5s -20%
use_hint 4s 3s +33%
yvec_get_poly 4s 2s +100%
yvec_init 4s 3s +33%
decompose 3s 4s -25%
intt_native_aarch64 3s 4s -25%
keccak_f1600_x4_native_avx2 3s 2s +50%
keccak_finalize 3s 3s +0%
keccakf1600_xor_bytes 3s 2s +50%
keccakf1600_xor_bytes (big endian) 3s 2s +50%
keccakf1600x4_extract_bytes 3s 2s +50%
keccakf1600x4_xor_bytes 3s 3s +0%
mld_ct_cmask_neg_i32 3s 2s +50%
mld_ct_get_optblocker_u32 3s 1s +200%
mld_h 3s 4s -25%
mld_keccakf1600_extract_bytes 3s 3s +0%
mld_value_barrier_i64 3s 4s -25%
pack_sk_rho_key_tr_s2 3s 3s +0%
pack_sk_s1 3s 3s +0%
poly_caddq_native_aarch64 3s 2s +50%
poly_chknorm_native_aarch64 3s 2s +50%
poly_decompose 3s 3s +0%
poly_decompose_32_native_aarch64 3s 2s +50%
poly_decompose_native 3s 3s +0%
poly_permute_bitrev_to_custom_optional_native 3s 2s +50%
poly_pointwise_montgomery_native 3s 4s -25%
poly_uniform_eta 3s 3s +0%
poly_uniform_gamma1_4x 3s 3s +0%
poly_use_hint_c 3s 5s -40%
polyeta_pack 3s 3s +0%
polyvec_matrix_pointwise_montgomery_row 3s 2s +50%
polyveck_pack_eta 3s 4s -25%
polyveck_reduce 3s 3s +0%
polyveck_unpack_eta 3s 3s +0%
polyvecl_pointwise_acc_montgomery 3s 3s +0%
polyvecl_pointwise_acc_montgomery_native 3s 2s +50%
polyvecl_unpack_z 3s 4s -25%
polyz_unpack 3s 2s +50%
rej_eta_c 3s 3s +0%
rej_eta_native 3s 3s +0%
shake128_finalize 3s 2s +50%
shake128_init 3s 4s -25%
shake128x4_absorb_once 3s 1s +200%
shake128x4_squeezeblocks 3s 2s +50%
shake256 3s 3s +0%
shake256_absorb 3s 4s -25%
shake256_finalize 3s 3s +0%
shake256_release 3s 2s +50%
shake256x4_squeezeblocks 3s 2s +50%
sign_signature_pre_hash_internal 3s 5s -40%
sk_s1hat_get_poly 3s 2s +50%
sk_t0hat_get_poly 3s 4s -25%
sys_check_capability 3s 2s +50%
unpack_sk_s1hat 3s 3s +0%
caddq 2s 6s -67%
keccak_f1600_x1_native_aarch64 2s 3s -33%
keccak_f1600_x1_native_aarch64_v84a 2s 5s -60%
keccak_f1600_x4_native_aarch64_v8a_scalar_hybrid 2s 2s +0%
keccak_squeeze 2s 2s +0%
keccakf1600_extract_bytes (big endian) 2s 2s +0%
make_hint 2s 2s +0%
mld_ct_abs_i32 2s 2s +0%
mld_ct_cmask_nonzero_u32 2s 3s -33%
mld_ct_cmask_nonzero_u8 2s 2s +0%
mld_ct_get_optblocker_u8 2s 3s -33%
mld_value_barrier_u8 2s 3s -33%
montgomery_reduce 2s 3s -33%
ntt_native_x86_64 2s 3s -33%
pack_sig_c 2s 4s -50%
pack_sig_h 2s 3s -33%
pointwise_acc_native_aarch64 2s 6s -67%
poly_caddq 2s 4s -50%
poly_ntt_c 2s 4s -50%
poly_pointwise_montgomery 2s 3s -33%
poly_sub 2s 3s -33%
poly_uniform 2s 2s +0%
poly_use_hint 2s 3s -33%
polyt1_pack 2s 5s -60%
polyt1_unpack 2s 2s +0%
polyz_unpack_c 2s 7s -71%
polyz_unpack_native 2s 2s +0%
reduce32 2s 1s +100%
shake128_release 2s 1s +100%
shake128_squeeze 2s 2s +0%
sig_unpack_hints 2s 4s -50%
sign_signature 2s 6s -67%
sk_s2hat_get_poly 2s 2s +0%
unpack_sk_s2hat 2s 3s -33%
keccak_f1600_x4_native_aarch64_v84a 1s 4s -75%
keccak_f1600_x4_native_aarch64_v8a_v84a_scalar_hybrid 1s 2s -50%
mld_ct_get_optblocker_i64 1s 4s -75%
mld_ct_sel_int32 1s 1s +0%
mld_polymat_expand_entry 1s 4s -75%
polyvecl_unpack_eta 1s 5s -80%

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oqs-bot commented May 12, 2026

CBMC Results (ML-DSA-44)

⚠️ Attention Required

Proof Status Current Previous Change
polyvec_matrix_pointwise_montgomery_yvec ⚠️ 30s 14s +114%
Full Results (195 proofs)
Proof Status Current Previous Change
**TOTAL** 1656s 1601s +3.4%
polyvecl_pointwise_acc_montgomery_c 249s 237s +5%
rej_uniform_native 133s 115s +16%
mld_invntt_layer 93s 89s +4%
poly_pointwise_montgomery_c 93s 86s +8%
mld_ct_memcmp 76s 72s +6%
mld_attempt_signature_generation 47s 54s -13%
mld_ntt_layer 44s 39s +13%
polyvec_matrix_expand 33s 27s +22%
polyvec_matrix_pointwise_montgomery_yvec ⚠️ 30s 14s +114%
fqmul 27s 27s +0%
sign_verify_internal 25s 30s -17%
keccakf1600x4_permute_native 24s 23s +4%
sign_signature_internal 24s 28s -14%
rej_uniform_c 20s 16s +25%
mld_ntt_butterfly_block 17s 16s +6%
polyvecl_chknorm 17s 16s +6%
rej_uniform 17s 17s +0%
mld_check_pct 14s 15s -7%
poly_uniform_eta_4x 14s 14s +0%
polyt0_unpack 14s 15s -7%
compute_pack_t0_t1 13s 15s -13%
poly_chknorm_c 13s 15s -13%
polyeta_unpack 12s 11s +9%
polyz_unpack_c 12s 13s -8%
poly_uniform_4x 11s 11s +0%
poly_add 10s 13s -23%
keccak_absorb_once_x4 9s 9s +0%
poly_invntt_tomont_c 9s 6s +50%
polyveck_decompose 8s 7s +14%
keccakf1600_permute 7s 7s +0%
keccakf1600_permute_native 7s 7s +0%
polyvecl_ntt 7s 6s +17%
keccak_absorb 6s 6s +0%
mld_compute_pack_z 6s 8s -25%
mld_prepare_domain_separation_prefix 6s 3s +100%
poly_chknorm 6s 3s +100%
polyz_unpack_19_native_aarch64 6s 5s +20%
sign 6s 7s -14%
sign_pk_from_sk 6s 6s +0%
sign_signature 6s 4s +50%
unpack_sk 6s 3s +100%
intt_native_aarch64 5s 2s +150%
ntt_native_x86_64 5s 5s +0%
pack_sk_s1 5s 3s +67%
pointwise_acc_native_aarch64 5s 5s +0%
poly_caddq_c 5s 4s +25%
poly_challenge 5s 7s -29%
poly_ntt_c 5s 3s +67%
poly_power2round 5s 6s -17%
poly_sub 5s 4s +25%
poly_use_hint_native 5s 2s +150%
polyvec_matrix_expand_serial 5s 10s -50%
polyveck_pack_eta 5s 1s +400%
polyvecl_unpack_eta 5s 4s +25%
rej_eta_native 5s 6s -17%
shake128_absorb 5s 1s +400%
shake128x4_absorb_once 5s 2s +150%
sign_keypair 5s 4s +25%
sign_verify_pre_hash_internal 5s 4s +25%
unpack_sk_s2hat 5s 4s +25%
keccak_f1600_x4_native_avx2 4s 4s +0%
keccak_squeezeblocks_x4 4s 5s -20%
keccakf1600_xor_bytes 4s 3s +33%
keccakf1600x4_xor_bytes_native 4s 4s +0%
mld_sample_s1_s2_serial 4s 5s -20%
ntt_native_aarch64 4s 5s -20%
nttunpack_native_x86_64 4s 4s +0%
pointwise_acc_native_x86_64 4s 6s -33%
pointwise_native_x86_64 4s 3s +33%
poly_decompose_c 4s 6s -33%
poly_invntt_tomont_native 4s 3s +33%
poly_permute_bitrev_to_custom_optional 4s 1s +300%
poly_pointwise_montgomery 4s 4s +0%
poly_shiftl 4s 9s -56%
poly_uniform_gamma1_4x 4s 3s +33%
poly_use_hint 4s 4s +0%
poly_use_hint_native_aarch64 4s 2s +100%
polyveck_caddq 4s 5s -20%
polyveck_chknorm 4s 7s -43%
polyveck_invntt_tomont 4s 4s +0%
polyveck_pack_w1 4s 3s +33%
shake128_finalize 4s 2s +100%
shake256 4s 2s +100%
sign_keypair_internal 4s 3s +33%
sign_open 4s 3s +33%
sign_signature_extmu 4s 4s +0%
sign_verify_extmu 4s 3s +33%
sign_verify_pre_hash_shake256 4s 3s +33%
sk_s1hat_get_poly 4s 3s +33%
use_hint 4s 2s +100%
caddq 3s 3s +0%
decompose 3s 1s +200%
fqscale 3s 2s +50%
intt_native_x86_64 3s 2s +50%
keccak_f1600_x1_native_aarch64 3s 3s +0%
keccak_f1600_x4_native_aarch64_v8a_v84a_scalar_hybrid 3s 1s +200%
keccak_finalize 3s 1s +200%
keccak_squeeze 3s 2s +50%
keccakf1600x4_extract_bytes 3s 5s -40%
keccakf1600x4_extract_bytes_native 3s 1s +200%
make_hint 3s 3s +0%
mld_ct_abs_i32 3s 4s -25%
mld_ct_cmask_nonzero_u32 3s 3s +0%
mld_ct_cmask_nonzero_u8 3s 3s +0%
mld_h 3s 3s +0%
mld_sample_s1_s2 3s 2s +50%
mld_value_barrier_i64 3s 2s +50%
mld_value_barrier_u8 3s 2s +50%
pack_sig_h 3s 2s +50%
pack_sig_z 3s 3s +0%
pack_sk_rho_key_tr_s2 3s 5s -40%
pointwise_native_aarch64 3s 3s +0%
poly_caddq 3s 3s +0%
poly_caddq_native_aarch64 3s 4s -25%
poly_chknorm_native 3s 3s +0%
poly_chknorm_native_aarch64 3s 3s +0%
poly_decompose 3s 3s +0%
poly_decompose_native 3s 5s -40%
poly_invntt_tomont 3s 2s +50%
poly_ntt 3s 3s +0%
poly_permute_bitrev_to_custom_optional_native 3s 2s +50%
poly_reduce 3s 3s +0%
poly_uniform 3s 4s -25%
polyeta_pack 3s 5s -40%
polyt0_pack 3s 4s -25%
polyvec_matrix_pointwise_montgomery_row 3s 2s +50%
polyveck_ntt 3s 5s -40%
polyveck_unpack_eta 3s 2s +50%
polyvecl_pack_eta 3s 4s -25%
polyvecl_uniform_gamma1 3s 4s -25%
polyvecl_unpack_z 3s 1s +200%
polyz_unpack 3s 4s -25%
polyz_unpack_17_native_aarch64 3s 4s -25%
rej_eta_c 3s 3s +0%
shake128_init 3s 2s +50%
shake128_release 3s 1s +200%
shake128x4_squeezeblocks 3s 3s +0%
shake256_absorb 3s 1s +200%
shake256_release 3s 4s -25%
sign_signature_pre_hash_internal 3s 6s -50%
sign_verify 3s 2s +50%
sk_s2hat_get_poly 3s 3s +0%
sys_check_capability 3s 2s +50%
unpack_pk_t1 3s 2s +50%
unpack_sk_t0hat 3s 3s +0%
keccak_f1600_x1_native_aarch64_v84a 2s 3s -33%
keccak_f1600_x4_native_aarch64_v84a 2s 2s +0%
keccak_init 2s 3s -33%
keccakf1600_extract_bytes (big endian) 2s 3s -33%
keccakf1600x4_permute 2s 3s -33%
keccakf1600x4_xor_bytes 2s 3s -33%
mld_ct_get_optblocker_i64 2s 4s -50%
mld_ct_get_optblocker_u32 2s 1s +100%
mld_ct_get_optblocker_u8 2s 3s -33%
mld_ct_sel_int32 2s 4s -50%
mld_keccakf1600_extract_bytes 2s 3s -33%
mld_polymat_expand_entry 2s 1s +100%
mld_value_barrier_u32 2s 2s +0%
montgomery_reduce 2s 2s +0%
pack_sig_c 2s 3s -33%
poly_caddq_native 2s 3s -33%
poly_decompose_32_native_aarch64 2s 3s -33%
poly_decompose_88_native_aarch64 2s 2s +0%
poly_ntt_native 2s 2s +0%
poly_pointwise_montgomery_native 2s 3s -33%
poly_uniform_eta 2s 4s -50%
poly_uniform_gamma1 2s 1s +100%
poly_use_hint_c 2s 4s -50%
polyt1_pack 2s 4s -50%
polyt1_unpack 2s 2s +0%
polyvecl_pointwise_acc_montgomery 2s 3s -33%
polyvecl_pointwise_acc_montgomery_native 2s 2s +0%
polyvecl_uniform_gamma1_serial 2s 2s +0%
polyw1_pack 2s 4s -50%
polyz_pack 2s 3s -33%
power2round 2s 4s -50%
reduce32 2s 3s -33%
shake128_squeeze 2s 2s +0%
shake256_finalize 2s 1s +100%
shake256_init 2s 2s +0%
shake256_squeeze 2s 2s +0%
shake256x4_absorb_once 2s 3s -33%
sig_unpack_hints 2s 2s +0%
sign_signature_pre_hash_shake256 2s 6s -67%
sk_t0hat_get_poly 2s 1s +100%
unpack_sk_s1hat 2s 2s +0%
yvec_get_poly 2s 4s -50%
yvec_init 2s 2s +0%
keccak_f1600_x4_native_aarch64_v8a_scalar_hybrid 1s 2s -50%
keccakf1600_xor_bytes (big endian) 1s 6s -83%
mld_ct_cmask_neg_i32 1s 1s +0%
polyveck_reduce 1s 2s -50%
polyz_unpack_native 1s 2s -50%
rej_eta 1s 3s -67%
shake256x4_squeezeblocks 1s 4s -75%

CBMC contracts in this repo currently require one instance of
requires(memory_no_alias(...)) per pointer argument and a
parallel set of memory_slice(...) targets in assigns(...).
For functions dealing with multiple pointers, this quickly
bloats and thereby impedes the readability of the CBMC specs.

Introduce two variadic preprocessor macros in mldsa/src/cbmc.h that
unfold a list of regions into the corresponding memory_no_alias /
memory_slice calls, joined as required by their containing clause:

```
  requires(disjoint(arg, ...))   -- AND-joined memory_no_alias checks
  assigns(..., slices(arg, ...)) -- comma-joined memory_slice targets
```

Each arg is either a bare object x (size sizeof(*x)) or a pair
(x, N) where N is an element count (size sizeof(*x) * N). The pair
form covers byte buffers like uint8_t seed[CRHBYTES] and typed
arrays where the count comes from a parameter rather than the type.

Implementation uses the standard C99 variadic-preprocessor toolkit
(arg counting, IS_PAIR probe via parenthesis detection, per-arity
map/join dispatch) capped at 16 arguments. The macros are defined
only inside the existing #ifdef CBMC block, so the C90 build path
is unaffected.

Signed-off-by: Hanno Becker <beckphan@amazon.co.uk>
@hanno-becker
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@mkannwischer This is not ready for detailed review as is, but I would like to hear your thoughts on the general direction and what specific argument/macro shape you find the most appealing.

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