Refactor keccak_squeezeblock_x4() to improve proof time.

[rod-chapman]

Removes pointer arithmetic in favour of an integer current_offset value. Simplifies loop invariant.

Proof time on M1/macOS falls from 127s to 25s for all values of MLKEM_K.

With gcc 14.2.0 on macOS, generated code at -O3 is identical to the original, so no performance impact expected.

[oqs-bot]

CBMC Results (ML-KEM-768)

Full Results (187 proofs)

Proof	Status	Current	Previous	Change
**TOTAL**	✅	1381s	1373s	+0.6%
mlk_indcpa_enc	✅	272s	256s	+6%
mlk_indcpa_keypair_derand	✅	216s	187s	+16%
mlk_rej_uniform_c	✅	76s	68s	+12%
polyvec_basemul_acc_montgomery_cached_native	✅	61s	60s	+2%
mlk_polyvec_basemul_acc_montgomery_cached_c	✅	50s	45s	+11%
mlk_poly_rej_uniform	✅	34s	32s	+6%
mlk_polyvec_add	✅	28s	26s	+8%
poly_ntt_native	✅	27s	24s	+12%
mlk_keccak_squeezeblocks_x4	✅	26s	119s	-78%
keccakf1600x4_permute_native_x4	✅	18s	19s	-5%
mlk_indcpa_dec	✅	17s	16s	+6%
mlk_poly_decompress_d4_native	✅	15s	11s	+36%
mlk_poly_decompress_d10_native	✅	14s	10s	+40%
mlk_poly_reduce_native	✅	14s	15s	-7%
mlk_ntt_layer	✅	13s	9s	+44%
mlk_keccak_absorb_once_x4	✅	12s	9s	+33%
mlk_ntt_butterfly_block	✅	9s	6s	+50%
mlk_poly_frommsg	✅	9s	8s	+12%
mlk_poly_rej_uniform_x4	✅	9s	7s	+29%
mlk_keccak_squeezeblocks	✅	8s	7s	+14%
mlk_fqmul	✅	7s	6s	+17%
mlk_keccak_squeeze_once	✅	7s	8s	-12%
mlk_poly_frombytes_native	✅	7s	7s	+0%
keccakf1600_permute_native	✅	6s	6s	+0%
mlk_invntt_layer	✅	6s	5s	+20%
nttunpack_native_x86_64	✅	6s	1s	+500%
kem_dec	✅	5s	4s	+25%
mlk_ct_sel_int16	✅	5s	3s	+67%
mlk_poly_add	✅	5s	5s	+0%
mlk_poly_decompress_d10_c	✅	5s	4s	+25%
mlk_poly_mulcache_compute_c	✅	5s	3s	+67%
mlk_polymat_permute_bitrev_to_custom	✅	5s	6s	-17%
mlk_scalar_decompress_d4	✅	5s	3s	+67%
mlk_shake256x4	✅	5s	8s	-38%
poly_decompress_d10_native_x86_64	✅	5s	4s	+25%
poly_decompress_d4_native_x86_64	✅	5s	6s	-17%
polyvec_basemul_acc_montgomery_cached_k3_native_aarch64	✅	5s	2s	+150%
keccakf1600x4_xor_bytes_native	✅	4s	4s	+0%
mlk_gen_matrix	✅	4s	3s	+33%
mlk_keccak_absorb_once	✅	4s	4s	+0%
mlk_keccakf1600_extract_bytes (big endian)	✅	4s	2s	+100%
mlk_poly_compress_d10_c	✅	4s	3s	+33%
mlk_poly_compress_d4	✅	4s	3s	+33%
mlk_poly_compress_d5_native	✅	4s	2s	+100%
mlk_poly_decompress_d5	✅	4s	2s	+100%
mlk_poly_frombytes_c	✅	4s	4s	+0%
mlk_poly_invntt_tomont_c	✅	4s	3s	+33%
mlk_poly_reduce_c	✅	4s	1s	+300%
mlk_polyvec_frombytes	✅	4s	3s	+33%
mlk_polyvec_reduce	✅	4s	1s	+300%
mlk_scalar_compress_d11	✅	4s	2s	+100%
mlk_sha3_256	✅	4s	4s	+0%
poly_compress_d4_native_x86_64	✅	4s	2s	+100%
poly_invntt_tomont_native	✅	4s	1s	+300%
poly_tomont_native_x86_64	✅	4s	3s	+33%
intt_native_x86_64	✅	3s	2s	+50%
keccak_f1600_x1_native_aarch64	✅	3s	2s	+50%
keccakf1600x4_extract_bytes_native	✅	3s	1s	+200%
kem_keypair	✅	3s	2s	+50%
kem_keypair_derand	✅	3s	3s	+0%
mlk_barrett_reduce	✅	3s	3s	+0%
mlk_check_pct	✅	3s	3s	+0%
mlk_ct_cmask_nonzero_u16	✅	3s	3s	+0%
mlk_gen_matrix_serial	✅	3s	4s	-25%
mlk_keccakf1600_extract_bytes	✅	3s	2s	+50%
mlk_keccakf1600_permute	✅	3s	3s	+0%
mlk_keccakf1600_xor_bytes	✅	3s	2s	+50%
mlk_keccakf1600x4_permute	✅	3s	1s	+200%
mlk_matvec_mul	✅	3s	5s	-40%
mlk_poly_compress_d11_c	✅	3s	3s	+0%
mlk_poly_compress_d11_native	✅	3s	3s	+0%
mlk_poly_compress_d4_native	✅	3s	3s	+0%
mlk_poly_compress_dv	✅	3s	2s	+50%
mlk_poly_decompress_d11	✅	3s	2s	+50%
mlk_poly_decompress_d11_native	✅	3s	2s	+50%
mlk_poly_decompress_d4	✅	3s	2s	+50%
mlk_poly_decompress_d5_native	✅	3s	4s	-25%
mlk_poly_decompress_du	✅	3s	3s	+0%
mlk_poly_getnoise_eta1_4x_native	✅	3s	3s	+0%
mlk_poly_mulcache_compute	✅	3s	2s	+50%
mlk_poly_mulcache_compute_native	✅	3s	2s	+50%
mlk_poly_tobytes_c	✅	3s	1s	+200%
mlk_poly_tomont_c	✅	3s	3s	+0%
mlk_poly_tomont_native	✅	3s	2s	+50%
mlk_poly_tomsg	✅	3s	2s	+50%
mlk_polyvec_ntt	✅	3s	1s	+200%
mlk_polyvec_permute_bitrev_to_custom_native	✅	3s	2s	+50%
mlk_polyvec_tobytes	✅	3s	3s	+0%
mlk_scalar_compress_d1	✅	3s	1s	+200%
mlk_scalar_compress_d10	✅	3s	2s	+50%
mlk_scalar_compress_d4	✅	3s	1s	+200%
mlk_sha3_512	✅	3s	3s	+0%
mlk_shake128x4_absorb_once	✅	3s	4s	-25%
mlk_shake256	✅	3s	3s	+0%
ntt_native_x86_64	✅	3s	3s	+0%
poly_compress_d11_native_x86_64	✅	3s	4s	-25%
poly_frombytes_native_x86_64	✅	3s	5s	-40%
poly_getnoise_eta1122_4x_native	✅	3s	3s	+0%
poly_mulcache_compute_native_x86_64	✅	3s	3s	+0%
poly_reduce_native_x86_64	✅	3s	2s	+50%
poly_tobytes_native_aarch64	✅	3s	3s	+0%
polyvec_basemul_acc_montgomery_cached_k2_native_aarch64	✅	3s	3s	+0%
polyvec_basemul_acc_montgomery_cached_k2_native_x86_64	✅	3s	4s	-25%
polyvec_basemul_acc_montgomery_cached_k4_native_x86_64	✅	3s	2s	+50%
rej_uniform_native	✅	3s	2s	+50%
rej_uniform_native_aarch64	✅	3s	4s	-25%
intt_native_aarch64	✅	2s	3s	-33%
keccak_f1600_x1_native_aarch64_v84a	✅	2s	2s	+0%
keccak_f1600_x4_native_aarch64_v8a_v84a_scalar_hybrid	✅	2s	2s	+0%
keccak_f1600_x4_native_avx2	✅	2s	3s	-33%
kem_check_pk	✅	2s	3s	-33%
kem_check_sk	✅	2s	1s	+100%
kem_enc	✅	2s	3s	-33%
kem_enc_derand	✅	2s	2s	+0%
mlk_ct_cmov_zero	✅	2s	2s	+0%
mlk_ct_get_optblocker_i32	✅	2s	2s	+0%
mlk_ct_memcmp	✅	2s	3s	-33%
mlk_keccakf1600_xor_bytes (big endian)	✅	2s	3s	-33%
mlk_keypair_getnoise_eta1	✅	2s	2s	+0%
mlk_poly_cbd_eta2	✅	2s	2s	+0%
mlk_poly_compress_d10	✅	2s	1s	+100%
mlk_poly_compress_d10_native	✅	2s	1s	+100%
mlk_poly_compress_d11	✅	2s	1s	+100%
mlk_poly_compress_d4_c	✅	2s	4s	-50%
mlk_poly_compress_d5	✅	2s	2s	+0%
mlk_poly_compress_d5_c	✅	2s	2s	+0%
mlk_poly_compress_du	✅	2s	1s	+100%
mlk_poly_decompress_d10	✅	2s	1s	+100%
mlk_poly_decompress_d4_c	✅	2s	1s	+100%
mlk_poly_decompress_d5_c	✅	2s	3s	-33%
mlk_poly_frombytes	✅	2s	4s	-50%
mlk_poly_getnoise_eta1122_4x	✅	2s	4s	-50%
mlk_poly_getnoise_eta1_4x	✅	2s	3s	-33%
mlk_poly_getnoise_eta2	✅	2s	2s	+0%
mlk_poly_invntt_tomont	✅	2s	2s	+0%
mlk_poly_ntt	✅	2s	2s	+0%
mlk_poly_ntt_c	✅	2s	6s	-67%
mlk_poly_sub	✅	2s	3s	-33%
mlk_poly_tobytes_native	✅	2s	1s	+100%
mlk_poly_tomont	✅	2s	2s	+0%
mlk_polyvec_basemul_acc_montgomery_cached	✅	2s	1s	+100%
mlk_polyvec_compress_du	✅	2s	3s	-33%
mlk_polyvec_invntt_tomont	✅	2s	3s	-33%
mlk_polyvec_permute_bitrev_to_custom	✅	2s	3s	-33%
mlk_polyvec_tomont	✅	2s	3s	-33%
mlk_scalar_compress_d5	✅	2s	2s	+0%
mlk_scalar_decompress_d11	✅	2s	1s	+100%
mlk_scalar_decompress_d5	✅	2s	1s	+100%
mlk_shake128_absorb_once	✅	2s	3s	-33%
mlk_value_barrier_u8	✅	2s	1s	+100%
ntt_native_aarch64	✅	2s	4s	-50%
poly_compress_d5_native_x86_64	✅	2s	4s	-50%
poly_decompress_d5_native_x86_64	✅	2s	1s	+100%
poly_reduce_native_aarch64	✅	2s	1s	+100%
poly_tobytes_native_x86_64	✅	2s	5s	-60%
poly_tomont_native_aarch64	✅	2s	3s	-33%
polyvec_basemul_acc_montgomery_cached_k3_native_x86_64	✅	2s	2s	+0%
rej_uniform_native_x86_64	✅	2s	2s	+0%
sys_check_capability	✅	2s	2s	+0%
keccak_f1600_x4_native_aarch64_v84a	✅	1s	1s	+0%
keccak_f1600_x4_native_aarch64_v8a_scalar_hybrid	✅	1s	1s	+0%
mlk_ct_cmask_neg_i16	✅	1s	1s	+0%
mlk_ct_cmask_nonzero_u8	✅	1s	2s	-50%
mlk_ct_get_optblocker_u32	✅	1s	2s	-50%
mlk_ct_get_optblocker_u8	✅	1s	3s	-67%
mlk_ct_sel_uint8	✅	1s	3s	-67%
mlk_keccakf1600x4_extract_bytes	✅	1s	3s	-67%
mlk_keccakf1600x4_xor_bytes	✅	1s	2s	-50%
mlk_montgomery_reduce	✅	1s	2s	-50%
mlk_poly_cbd_eta1	✅	1s	4s	-75%
mlk_poly_decompress_d11_c	✅	1s	1s	+0%
mlk_poly_decompress_dv	✅	1s	1s	+0%
mlk_poly_reduce	✅	1s	1s	+0%
mlk_poly_tobytes	✅	1s	1s	+0%
mlk_polyvec_decompress_du	✅	1s	1s	+0%
mlk_polyvec_mulcache_compute	✅	1s	2s	-50%
mlk_rej_uniform	✅	1s	1s	+0%
mlk_scalar_decompress_d10	✅	1s	4s	-75%
mlk_scalar_signed_to_unsigned_q	✅	1s	3s	-67%
mlk_shake128_squeezeblocks	✅	1s	1s	+0%
mlk_shake128x4_squeezeblocks	✅	1s	1s	+0%
mlk_value_barrier_i32	✅	1s	2s	-50%
mlk_value_barrier_u32	✅	1s	1s	+0%
poly_compress_d10_native_x86_64	✅	1s	1s	+0%
poly_decompress_d11_native_x86_64	✅	1s	3s	-67%
poly_mulcache_compute_native_aarch64	✅	1s	2s	-50%
polyvec_basemul_acc_montgomery_cached_k4_native_aarch64	✅	1s	4s	-75%

[oqs-bot]

CBMC Results (ML-KEM-1024)

Full Results (187 proofs)

Proof	Status	Current	Previous	Change
**TOTAL**	✅	1441s	1386s	+4.0%
mlk_indcpa_enc	✅	281s	246s	+14%
polyvec_basemul_acc_montgomery_cached_native	✅	133s	123s	+8%
mlk_rej_uniform_c	✅	102s	74s	+38%
mlk_indcpa_keypair_derand	✅	86s	81s	+6%
mlk_polyvec_basemul_acc_montgomery_cached_c	✅	77s	69s	+12%
mlk_poly_rej_uniform	✅	37s	33s	+12%
poly_ntt_native	✅	36s	32s	+12%
mlk_polyvec_add	✅	26s	25s	+4%
mlk_keccak_squeezeblocks_x4	✅	25s	122s	-80%
keccakf1600x4_permute_native_x4	✅	19s	20s	-5%
mlk_poly_decompress_d11_native	✅	16s	12s	+33%
mlk_poly_decompress_d5_native	✅	16s	14s	+14%
mlk_ntt_layer	✅	15s	11s	+36%
mlk_poly_reduce_native	✅	14s	15s	-7%
mlk_polyvec_ntt	✅	14s	14s	+0%
mlk_indcpa_dec	✅	13s	13s	+0%
mlk_poly_frommsg	✅	11s	10s	+10%
mlk_polymat_permute_bitrev_to_custom	✅	11s	10s	+10%
mlk_keccak_absorb_once_x4	✅	10s	7s	+43%
mlk_ntt_butterfly_block	✅	9s	10s	-10%
mlk_fqmul	✅	8s	7s	+14%
mlk_poly_compress_d11_c	✅	8s	13s	-38%
mlk_poly_frombytes_native	✅	8s	7s	+14%
mlk_gen_matrix	✅	7s	9s	-22%
mlk_gen_matrix_serial	✅	7s	5s	+40%
mlk_poly_rej_uniform_x4	✅	7s	8s	-12%
keccakf1600_permute_native	✅	6s	6s	+0%
kem_check_pk	✅	6s	4s	+50%
kem_dec	✅	6s	7s	-14%
mlk_keccak_squeeze_once	✅	6s	6s	+0%
mlk_keccak_squeezeblocks	✅	6s	5s	+20%
mlk_invntt_layer	✅	5s	4s	+25%
mlk_poly_add	✅	5s	4s	+25%
mlk_poly_cbd_eta2	✅	5s	2s	+150%
mlk_poly_getnoise_eta2	✅	5s	5s	+0%
mlk_poly_sub	✅	5s	3s	+67%
mlk_polyvec_frombytes	✅	5s	3s	+67%
poly_decompress_d5_native_x86_64	✅	5s	3s	+67%
polyvec_basemul_acc_montgomery_cached_k2_native_aarch64	✅	5s	1s	+400%
intt_native_x86_64	✅	4s	2s	+100%
kem_keypair	✅	4s	2s	+100%
mlk_ct_sel_uint8	✅	4s	3s	+33%
mlk_keccak_absorb_once	✅	4s	3s	+33%
mlk_keccakf1600_permute	✅	4s	3s	+33%
mlk_keccakf1600_xor_bytes (big endian)	✅	4s	2s	+100%
mlk_poly_compress_d4_native	✅	4s	3s	+33%
mlk_poly_decompress_d10	✅	4s	3s	+33%
mlk_poly_decompress_d10_c	✅	4s	4s	+0%
mlk_poly_decompress_d4	✅	4s	3s	+33%
mlk_poly_decompress_d5	✅	4s	3s	+33%
mlk_poly_decompress_d5_c	✅	4s	2s	+100%
mlk_poly_frombytes	✅	4s	1s	+300%
mlk_poly_getnoise_eta1122_4x	✅	4s	1s	+300%
mlk_poly_invntt_tomont_c	✅	4s	5s	-20%
mlk_poly_mulcache_compute_c	✅	4s	3s	+33%
mlk_poly_reduce_c	✅	4s	4s	+0%
mlk_poly_tomont_native	✅	4s	3s	+33%
mlk_polyvec_compress_du	✅	4s	2s	+100%
mlk_polyvec_permute_bitrev_to_custom_native	✅	4s	2s	+100%
mlk_scalar_compress_d1	✅	4s	2s	+100%
mlk_scalar_decompress_d4	✅	4s	2s	+100%
mlk_scalar_signed_to_unsigned_q	✅	4s	2s	+100%
mlk_shake256x4	✅	4s	3s	+33%
poly_decompress_d10_native_x86_64	✅	4s	1s	+300%
poly_decompress_d11_native_x86_64	✅	4s	6s	-33%
keccak_f1600_x1_native_aarch64	✅	3s	2s	+50%
keccak_f1600_x4_native_avx2	✅	3s	1s	+200%
keccakf1600x4_extract_bytes_native	✅	3s	2s	+50%
keccakf1600x4_xor_bytes_native	✅	3s	4s	-25%
kem_check_sk	✅	3s	3s	+0%
kem_enc	✅	3s	1s	+200%
kem_enc_derand	✅	3s	2s	+50%
mlk_check_pct	✅	3s	2s	+50%
mlk_ct_cmask_nonzero_u8	✅	3s	2s	+50%
mlk_ct_get_optblocker_u32	✅	3s	4s	-25%
mlk_ct_memcmp	✅	3s	2s	+50%
mlk_ct_sel_int16	✅	3s	2s	+50%
mlk_keccakf1600_extract_bytes (big endian)	✅	3s	1s	+200%
mlk_keypair_getnoise_eta1	✅	3s	3s	+0%
mlk_matvec_mul	✅	3s	2s	+50%
mlk_poly_compress_d10_c	✅	3s	2s	+50%
mlk_poly_compress_d11_native	✅	3s	1s	+200%
mlk_poly_compress_d5	✅	3s	3s	+0%
mlk_poly_compress_d5_c	✅	3s	2s	+50%
mlk_poly_compress_du	✅	3s	2s	+50%
mlk_poly_decompress_d10_native	✅	3s	3s	+0%
mlk_poly_decompress_d11_c	✅	3s	2s	+50%
mlk_poly_decompress_d4_native	✅	3s	2s	+50%
mlk_poly_decompress_dv	✅	3s	2s	+50%
mlk_poly_tobytes	✅	3s	2s	+50%
mlk_poly_tomont	✅	3s	6s	-50%
mlk_poly_tomont_c	✅	3s	1s	+200%
mlk_polyvec_decompress_du	✅	3s	3s	+0%
mlk_polyvec_invntt_tomont	✅	3s	3s	+0%
mlk_polyvec_permute_bitrev_to_custom	✅	3s	2s	+50%
mlk_polyvec_tobytes	✅	3s	1s	+200%
mlk_scalar_compress_d11	✅	3s	1s	+200%
mlk_sha3_512	✅	3s	1s	+200%
mlk_shake128_squeezeblocks	✅	3s	3s	+0%
mlk_shake256	✅	3s	3s	+0%
mlk_value_barrier_i32	✅	3s	1s	+200%
mlk_value_barrier_u8	✅	3s	3s	+0%
ntt_native_x86_64	✅	3s	1s	+200%
poly_compress_d4_native_x86_64	✅	3s	2s	+50%
poly_decompress_d4_native_x86_64	✅	3s	2s	+50%
poly_frombytes_native_x86_64	✅	3s	5s	-40%
poly_mulcache_compute_native_aarch64	✅	3s	2s	+50%
poly_tobytes_native_x86_64	✅	3s	2s	+50%
polyvec_basemul_acc_montgomery_cached_k2_native_x86_64	✅	3s	3s	+0%
polyvec_basemul_acc_montgomery_cached_k3_native_x86_64	✅	3s	4s	-25%
rej_uniform_native_x86_64	✅	3s	3s	+0%
intt_native_aarch64	✅	2s	1s	+100%
keccak_f1600_x4_native_aarch64_v84a	✅	2s	1s	+100%
keccak_f1600_x4_native_aarch64_v8a_scalar_hybrid	✅	2s	3s	-33%
keccak_f1600_x4_native_aarch64_v8a_v84a_scalar_hybrid	✅	2s	2s	+0%
mlk_barrett_reduce	✅	2s	2s	+0%
mlk_ct_cmask_neg_i16	✅	2s	2s	+0%
mlk_ct_cmask_nonzero_u16	✅	2s	3s	-33%
mlk_ct_get_optblocker_i32	✅	2s	1s	+100%
mlk_keccakf1600_extract_bytes	✅	2s	2s	+0%
mlk_keccakf1600_xor_bytes	✅	2s	2s	+0%
mlk_keccakf1600x4_extract_bytes	✅	2s	1s	+100%
mlk_keccakf1600x4_permute	✅	2s	2s	+0%
mlk_keccakf1600x4_xor_bytes	✅	2s	2s	+0%
mlk_montgomery_reduce	✅	2s	2s	+0%
mlk_poly_cbd_eta1	✅	2s	1s	+100%
mlk_poly_compress_d10	✅	2s	3s	-33%
mlk_poly_compress_d10_native	✅	2s	3s	-33%
mlk_poly_compress_d11	✅	2s	2s	+0%
mlk_poly_compress_d4	✅	2s	1s	+100%
mlk_poly_compress_d4_c	✅	2s	2s	+0%
mlk_poly_compress_d5_native	✅	2s	1s	+100%
mlk_poly_decompress_d4_c	✅	2s	3s	-33%
mlk_poly_decompress_du	✅	2s	3s	-33%
mlk_poly_frombytes_c	✅	2s	1s	+100%
mlk_poly_getnoise_eta1_4x	✅	2s	3s	-33%
mlk_poly_getnoise_eta1_4x_native	✅	2s	3s	-33%
mlk_poly_mulcache_compute_native	✅	2s	1s	+100%
mlk_poly_ntt	✅	2s	4s	-50%
mlk_poly_reduce	✅	2s	1s	+100%
mlk_poly_tobytes_native	✅	2s	2s	+0%
mlk_poly_tomsg	✅	2s	2s	+0%
mlk_polyvec_basemul_acc_montgomery_cached	✅	2s	4s	-50%
mlk_polyvec_mulcache_compute	✅	2s	2s	+0%
mlk_polyvec_reduce	✅	2s	1s	+100%
mlk_polyvec_tomont	✅	2s	1s	+100%
mlk_rej_uniform	✅	2s	1s	+100%
mlk_scalar_compress_d10	✅	2s	1s	+100%
mlk_scalar_compress_d4	✅	2s	3s	-33%
mlk_scalar_decompress_d10	✅	2s	2s	+0%
mlk_scalar_decompress_d11	✅	2s	3s	-33%
mlk_scalar_decompress_d5	✅	2s	3s	-33%
mlk_sha3_256	✅	2s	4s	-50%
mlk_shake128_absorb_once	✅	2s	3s	-33%
mlk_shake128x4_absorb_once	✅	2s	4s	-50%
mlk_shake128x4_squeezeblocks	✅	2s	3s	-33%
ntt_native_aarch64	✅	2s	4s	-50%
nttunpack_native_x86_64	✅	2s	2s	+0%
poly_compress_d10_native_x86_64	✅	2s	4s	-50%
poly_invntt_tomont_native	✅	2s	2s	+0%
poly_mulcache_compute_native_x86_64	✅	2s	1s	+100%
poly_reduce_native_x86_64	✅	2s	2s	+0%
poly_tobytes_native_aarch64	✅	2s	4s	-50%
poly_tomont_native_x86_64	✅	2s	3s	-33%
polyvec_basemul_acc_montgomery_cached_k3_native_aarch64	✅	2s	2s	+0%
polyvec_basemul_acc_montgomery_cached_k4_native_aarch64	✅	2s	2s	+0%
rej_uniform_native	✅	2s	1s	+100%
rej_uniform_native_aarch64	✅	2s	3s	-33%
keccak_f1600_x1_native_aarch64_v84a	✅	1s	2s	-50%
kem_keypair_derand	✅	1s	2s	-50%
mlk_ct_cmov_zero	✅	1s	1s	+0%
mlk_ct_get_optblocker_u8	✅	1s	2s	-50%
mlk_poly_compress_dv	✅	1s	2s	-50%
mlk_poly_decompress_d11	✅	1s	2s	-50%
mlk_poly_invntt_tomont	✅	1s	2s	-50%
mlk_poly_mulcache_compute	✅	1s	3s	-67%
mlk_poly_ntt_c	✅	1s	2s	-50%
mlk_poly_tobytes_c	✅	1s	2s	-50%
mlk_scalar_compress_d5	✅	1s	3s	-67%
mlk_value_barrier_u32	✅	1s	3s	-67%
poly_compress_d11_native_x86_64	✅	1s	2s	-50%
poly_compress_d5_native_x86_64	✅	1s	1s	+0%
poly_getnoise_eta1122_4x_native	✅	1s	2s	-50%
poly_reduce_native_aarch64	✅	1s	3s	-67%
poly_tomont_native_aarch64	✅	1s	2s	-50%
polyvec_basemul_acc_montgomery_cached_k4_native_x86_64	✅	1s	2s	-50%
sys_check_capability	✅	1s	2s	-50%

[oqs-bot]

CBMC Results (ML-KEM-512)

Full Results (187 proofs)

Proof	Status	Current	Previous	Change
**TOTAL**	✅	1397s	1261s	+10.8%
mlk_indcpa_keypair_derand	✅	179s	160s	+12%
mlk_indcpa_enc	✅	171s	145s	+18%
mlk_rej_uniform_c	✅	105s	76s	+38%
mlk_polyvec_basemul_acc_montgomery_cached_c	✅	99s	70s	+41%
mlk_poly_rej_uniform	✅	46s	40s	+15%
poly_ntt_native	✅	43s	35s	+23%
mlk_keccak_squeezeblocks_x4	✅	34s	123s	-72%
polyvec_basemul_acc_montgomery_cached_native	✅	26s	22s	+18%
mlk_poly_reduce_native	✅	22s	15s	+47%
keccakf1600x4_permute_native_x4	✅	20s	18s	+11%
mlk_polyvec_add	✅	20s	18s	+11%
mlk_poly_decompress_d10_native	✅	18s	13s	+38%
mlk_poly_decompress_d4_native	✅	18s	13s	+38%
mlk_ntt_layer	✅	15s	12s	+25%
mlk_poly_frommsg	✅	15s	11s	+36%
mlk_indcpa_dec	✅	14s	12s	+17%
mlk_keccak_absorb_once_x4	✅	13s	8s	+62%
mlk_poly_frombytes_native	✅	11s	10s	+10%
mlk_ntt_butterfly_block	✅	9s	7s	+29%
mlk_poly_rej_uniform_x4	✅	9s	8s	+12%
mlk_fqmul	✅	8s	8s	+0%
mlk_keccak_squeezeblocks	✅	8s	9s	-11%
mlk_polymat_permute_bitrev_to_custom	✅	8s	7s	+14%
mlk_invntt_layer	✅	7s	7s	+0%
poly_frombytes_native_x86_64	✅	7s	7s	+0%
poly_getnoise_eta1122_4x_native	✅	7s	2s	+250%
kem_check_pk	✅	6s	3s	+100%
mlk_keccak_squeeze_once	✅	6s	6s	+0%
mlk_keccakf1600_permute	✅	6s	3s	+100%
mlk_poly_add	✅	6s	5s	+20%
mlk_poly_cbd_eta2	✅	6s	6s	+0%
mlk_shake256x4	✅	6s	5s	+20%
poly_decompress_d10_native_x86_64	✅	6s	4s	+50%
keccakf1600_permute_native	✅	5s	4s	+25%
mlk_poly_compress_d5_native	✅	5s	3s	+67%
mlk_poly_frombytes	✅	5s	2s	+150%
mlk_poly_getnoise_eta1122_4x	✅	5s	3s	+67%
mlk_poly_mulcache_compute_c	✅	5s	3s	+67%
mlk_polyvec_invntt_tomont	✅	5s	3s	+67%
mlk_scalar_compress_d5	✅	5s	3s	+67%
poly_decompress_d4_native_x86_64	✅	5s	5s	+0%
poly_tobytes_native_aarch64	✅	5s	2s	+150%
polyvec_basemul_acc_montgomery_cached_k2_native_x86_64	✅	5s	3s	+67%
rej_uniform_native_aarch64	✅	5s	3s	+67%
intt_native_aarch64	✅	4s	3s	+33%
intt_native_x86_64	✅	4s	4s	+0%
keccak_f1600_x1_native_aarch64_v84a	✅	4s	2s	+100%
keccakf1600x4_xor_bytes_native	✅	4s	3s	+33%
kem_dec	✅	4s	4s	+0%
kem_enc	✅	4s	3s	+33%
kem_enc_derand	✅	4s	3s	+33%
mlk_barrett_reduce	✅	4s	3s	+33%
mlk_ct_get_optblocker_u32	✅	4s	3s	+33%
mlk_keccak_absorb_once	✅	4s	4s	+0%
mlk_keccakf1600x4_extract_bytes	✅	4s	2s	+100%
mlk_keypair_getnoise_eta1	✅	4s	3s	+33%
mlk_poly_decompress_d10_c	✅	4s	5s	-20%
mlk_poly_frombytes_c	✅	4s	2s	+100%
mlk_poly_getnoise_eta1_4x	✅	4s	2s	+100%
mlk_poly_tobytes_c	✅	4s	3s	+33%
mlk_poly_tobytes_native	✅	4s	2s	+100%
mlk_poly_tomont_c	✅	4s	4s	+0%
mlk_scalar_compress_d4	✅	4s	3s	+33%
mlk_shake128_squeezeblocks	✅	4s	2s	+100%
mlk_shake256	✅	4s	1s	+300%
nttunpack_native_x86_64	✅	4s	4s	+0%
poly_decompress_d5_native_x86_64	✅	4s	4s	+0%
poly_reduce_native_aarch64	✅	4s	2s	+100%
poly_tomont_native_x86_64	✅	4s	1s	+300%
keccak_f1600_x1_native_aarch64	✅	3s	1s	+200%
keccak_f1600_x4_native_aarch64_v84a	✅	3s	2s	+50%
keccak_f1600_x4_native_avx2	✅	3s	1s	+200%
kem_check_sk	✅	3s	3s	+0%
mlk_ct_cmask_neg_i16	✅	3s	2s	+50%
mlk_ct_cmov_zero	✅	3s	2s	+50%
mlk_ct_get_optblocker_u8	✅	3s	2s	+50%
mlk_gen_matrix	✅	3s	3s	+0%
mlk_gen_matrix_serial	✅	3s	2s	+50%
mlk_keccakf1600_extract_bytes (big endian)	✅	3s	1s	+200%
mlk_keccakf1600x4_permute	✅	3s	1s	+200%
mlk_poly_cbd_eta1	✅	3s	2s	+50%
mlk_poly_compress_d10	✅	3s	2s	+50%
mlk_poly_compress_d10_c	✅	3s	4s	-25%
mlk_poly_compress_d11	✅	3s	3s	+0%
mlk_poly_compress_d11_native	✅	3s	2s	+50%
mlk_poly_compress_d4	✅	3s	3s	+0%
mlk_poly_compress_d4_c	✅	3s	6s	-50%
mlk_poly_compress_d4_native	✅	3s	3s	+0%
mlk_poly_decompress_d11	✅	3s	2s	+50%
mlk_poly_decompress_d11_c	✅	3s	3s	+0%
mlk_poly_decompress_d11_native	✅	3s	2s	+50%
mlk_poly_decompress_d5	✅	3s	2s	+50%
mlk_poly_getnoise_eta1_4x_native	✅	3s	3s	+0%
mlk_poly_mulcache_compute_native	✅	3s	2s	+50%
mlk_poly_ntt	✅	3s	3s	+0%
mlk_poly_reduce	✅	3s	3s	+0%
mlk_poly_reduce_c	✅	3s	4s	-25%
mlk_polyvec_compress_du	✅	3s	3s	+0%
mlk_polyvec_decompress_du	✅	3s	2s	+50%
mlk_polyvec_mulcache_compute	✅	3s	5s	-40%
mlk_polyvec_ntt	✅	3s	5s	-40%
mlk_polyvec_reduce	✅	3s	4s	-25%
mlk_polyvec_tobytes	✅	3s	4s	-25%
mlk_scalar_compress_d1	✅	3s	3s	+0%
mlk_scalar_compress_d11	✅	3s	1s	+200%
mlk_scalar_decompress_d10	✅	3s	3s	+0%
mlk_scalar_decompress_d4	✅	3s	2s	+50%
mlk_scalar_signed_to_unsigned_q	✅	3s	4s	-25%
mlk_sha3_256	✅	3s	2s	+50%
mlk_shake128x4_absorb_once	✅	3s	2s	+50%
mlk_shake128x4_squeezeblocks	✅	3s	2s	+50%
mlk_value_barrier_i32	✅	3s	3s	+0%
mlk_value_barrier_u32	✅	3s	1s	+200%
ntt_native_x86_64	✅	3s	2s	+50%
poly_compress_d10_native_x86_64	✅	3s	2s	+50%
poly_decompress_d11_native_x86_64	✅	3s	1s	+200%
poly_invntt_tomont_native	✅	3s	3s	+0%
poly_mulcache_compute_native_x86_64	✅	3s	3s	+0%
poly_tomont_native_aarch64	✅	3s	2s	+50%
polyvec_basemul_acc_montgomery_cached_k3_native_x86_64	✅	3s	2s	+50%
polyvec_basemul_acc_montgomery_cached_k4_native_aarch64	✅	3s	3s	+0%
polyvec_basemul_acc_montgomery_cached_k4_native_x86_64	✅	3s	5s	-40%
rej_uniform_native	✅	3s	5s	-40%
rej_uniform_native_x86_64	✅	3s	3s	+0%
sys_check_capability	✅	3s	1s	+200%
keccak_f1600_x4_native_aarch64_v8a_scalar_hybrid	✅	2s	1s	+100%
keccak_f1600_x4_native_aarch64_v8a_v84a_scalar_hybrid	✅	2s	2s	+0%
keccakf1600x4_extract_bytes_native	✅	2s	2s	+0%
kem_keypair	✅	2s	3s	-33%
kem_keypair_derand	✅	2s	4s	-50%
mlk_check_pct	✅	2s	3s	-33%
mlk_ct_cmask_nonzero_u16	✅	2s	1s	+100%
mlk_ct_memcmp	✅	2s	2s	+0%
mlk_keccakf1600_xor_bytes	✅	2s	2s	+0%
mlk_matvec_mul	✅	2s	3s	-33%
mlk_montgomery_reduce	✅	2s	3s	-33%
mlk_poly_compress_d10_native	✅	2s	1s	+100%
mlk_poly_compress_d5	✅	2s	1s	+100%
mlk_poly_compress_d5_c	✅	2s	2s	+0%
mlk_poly_decompress_d10	✅	2s	1s	+100%
mlk_poly_decompress_d4	✅	2s	2s	+0%
mlk_poly_decompress_d5_c	✅	2s	2s	+0%
mlk_poly_decompress_d5_native	✅	2s	2s	+0%
mlk_poly_decompress_dv	✅	2s	1s	+100%
mlk_poly_getnoise_eta2	✅	2s	2s	+0%
mlk_poly_invntt_tomont	✅	2s	2s	+0%
mlk_poly_invntt_tomont_c	✅	2s	1s	+100%
mlk_poly_ntt_c	✅	2s	2s	+0%
mlk_poly_sub	✅	2s	1s	+100%
mlk_poly_tomont	✅	2s	2s	+0%
mlk_poly_tomsg	✅	2s	1s	+100%
mlk_polyvec_permute_bitrev_to_custom	✅	2s	2s	+0%
mlk_rej_uniform	✅	2s	3s	-33%
mlk_scalar_decompress_d11	✅	2s	2s	+0%
mlk_sha3_512	✅	2s	2s	+0%
mlk_shake128_absorb_once	✅	2s	2s	+0%
ntt_native_aarch64	✅	2s	2s	+0%
poly_compress_d11_native_x86_64	✅	2s	3s	-33%
poly_compress_d4_native_x86_64	✅	2s	3s	-33%
poly_compress_d5_native_x86_64	✅	2s	2s	+0%
poly_mulcache_compute_native_aarch64	✅	2s	2s	+0%
polyvec_basemul_acc_montgomery_cached_k2_native_aarch64	✅	2s	1s	+100%
polyvec_basemul_acc_montgomery_cached_k3_native_aarch64	✅	2s	4s	-50%
mlk_ct_cmask_nonzero_u8	✅	1s	1s	+0%
mlk_ct_get_optblocker_i32	✅	1s	2s	-50%
mlk_ct_sel_int16	✅	1s	3s	-67%
mlk_ct_sel_uint8	✅	1s	2s	-50%
mlk_keccakf1600_extract_bytes	✅	1s	1s	+0%
mlk_keccakf1600_xor_bytes (big endian)	✅	1s	1s	+0%
mlk_keccakf1600x4_xor_bytes	✅	1s	1s	+0%
mlk_poly_compress_d11_c	✅	1s	1s	+0%
mlk_poly_compress_du	✅	1s	2s	-50%
mlk_poly_compress_dv	✅	1s	1s	+0%
mlk_poly_decompress_d4_c	✅	1s	1s	+0%
mlk_poly_decompress_du	✅	1s	2s	-50%
mlk_poly_mulcache_compute	✅	1s	2s	-50%
mlk_poly_tobytes	✅	1s	2s	-50%
mlk_poly_tomont_native	✅	1s	4s	-75%
mlk_polyvec_basemul_acc_montgomery_cached	✅	1s	2s	-50%
mlk_polyvec_frombytes	✅	1s	1s	+0%
mlk_polyvec_permute_bitrev_to_custom_native	✅	1s	2s	-50%
mlk_polyvec_tomont	✅	1s	2s	-50%
mlk_scalar_compress_d10	✅	1s	2s	-50%
mlk_scalar_decompress_d5	✅	1s	1s	+0%
mlk_value_barrier_u8	✅	1s	3s	-67%
poly_reduce_native_x86_64	✅	1s	1s	+0%
poly_tobytes_native_x86_64	✅	1s	3s	-67%