Keep multi-seed Foundry lane bounded

Author: Th0rgal

.github/workflows/verify.yml

@@ -1621,7 +1621,8 @@ jobs:
         run: |
           echo "::group::Testing with seed ${{ matrix.seed }}"
           echo "DIFFTEST_RANDOM_SEED=${{ matrix.seed }}"
-          forge test
+          echo "Skipping Random10000 here; the sharded seed-42 Foundry job owns that stress lane."
+          forge test --no-match-test "Random10000"
           echo "::endgroup::"
 
       - name: Report seed-specific failure

docs/VERIFICATION_STATUS.md

@@ -225,7 +225,7 @@ Also note that the macro-generated `*_semantic_preservation` theorems are not co
 
 ## Differential Testing
 
-**Status**: CI runs large sharded randomized differential suites against the current contract set, comparing EDSL interpreter output against Solidity-compiled EVM execution.
+**Status**: CI runs large sharded randomized differential suites against the current contract set, comparing EDSL interpreter output against Solidity-compiled EVM execution. The seed-42 shard set owns the `Random10000` stress lane; the multi-seed lane skips that target so it can cover cheaper randomized/property tests across several seeds without serially repeating the slowest stress suite.
 
 ## Solidity Interop Support Matrix (Issue #586)
 

scripts/check_verify_sync.py

@@ -1294,8 +1294,13 @@ def env(job_body: str, key: str, ctx: str) -> str:
             "foundry-patched --no-match-test target mismatch: "
             f"workflow={patched_target!r}, spec={spec['expected_foundry_patched']['no_match_test']!r}"
         )
-    if _extract_no_match_target(multiseed_cmd) is not None:
-        errors.append("foundry-multi-seed must not use --no-match-test")
+    multiseed_expected = spec["expected_foundry_multi_seed"]
+    multiseed_target = _extract_no_match_target(multiseed_cmd)
+    if multiseed_target != multiseed_expected["no_match_test"]:
+        errors.append(
+            "foundry-multi-seed --no-match-test target mismatch: "
+            f"workflow={multiseed_target!r}, spec={multiseed_expected['no_match_test']!r}"
+        )
 
     patched_expected = spec["expected_foundry_patched"]
     for key, expected in [

scripts/test_multiple_seeds.sh

@@ -34,7 +34,10 @@ for seed in "${SEEDS[@]}"; do
     echo "Testing seed: $seed"
     echo "--------------------------------------"
 
-    if FOUNDRY_PROFILE=difftest DIFFTEST_RANDOM_SEED="$seed" DIFFTEST_SHARD_COUNT=1 DIFFTEST_SHARD_INDEX=0 DIFFTEST_RANDOM_SMALL=100 DIFFTEST_RANDOM_LARGE=10000 forge test; then
+    # The sharded seed-42 CI lane owns Random10000 stress coverage. This
+    # script is the multi-seed lane, so keep it focused on cheaper randomized
+    # and property coverage across seeds.
+    if FOUNDRY_PROFILE=difftest DIFFTEST_RANDOM_SEED="$seed" DIFFTEST_SHARD_COUNT=1 DIFFTEST_SHARD_INDEX=0 DIFFTEST_RANDOM_SMALL=100 DIFFTEST_RANDOM_LARGE=10000 forge test --no-match-test "Random10000"; then
         echo "✅ Seed $seed: PASSED"
     else
         echo "❌ Seed $seed: FAILED"
@@ -56,7 +59,7 @@ if [ ${#FAILED_SEEDS[@]} -gt 0 ]; then
     echo ""
     echo "To reproduce a failure:"
     for failed_seed in "${FAILED_SEEDS[@]}"; do
-        echo "  FOUNDRY_PROFILE=difftest DIFFTEST_RANDOM_SEED=$failed_seed DIFFTEST_SHARD_COUNT=1 DIFFTEST_SHARD_INDEX=0 DIFFTEST_RANDOM_SMALL=100 DIFFTEST_RANDOM_LARGE=10000 forge test -vv"
+        echo "  FOUNDRY_PROFILE=difftest DIFFTEST_RANDOM_SEED=$failed_seed DIFFTEST_SHARD_COUNT=1 DIFFTEST_SHARD_INDEX=0 DIFFTEST_RANDOM_SMALL=100 DIFFTEST_RANDOM_LARGE=10000 forge test --no-match-test \"Random10000\" -vv"
     done
     exit 1
 else

scripts/verify_sync_spec.json

@@ -810,7 +810,8 @@
       999,
       12345,
       67890
-    ]
+    ],
+    "no_match_test": "Random10000"
   },
   "expected_foundry_gas_calibration": {
     "profile": "difftest",

scripts/verify_sync_spec_source.py

@@ -695,7 +695,8 @@
                               'shard_count': 1,
                               'shard_index': 0,
                               'no_match_test': 'Random10000'},
- 'expected_foundry_multi_seed': {'seeds': [0, 1, 42, 123, 999, 12345, 67890]},
+ 'expected_foundry_multi_seed': {'seeds': [0, 1, 42, 123, 999, 12345, 67890],
+                                 'no_match_test': 'Random10000'},
  'expected_foundry_gas_calibration': {'profile': 'difftest',
                                       'artifact': 'static-gas-report',
                                       'command': 'python3 scripts/check_gas.py calibration '