[aorai] use WP cache in 'prove' ptest configuration

src/plugins/aorai/tests/wp-cache/cache/3d4c28839b26e3c8f8f17db00eba25e5.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.007,
+  "steps": 24 }

src/plugins/aorai/tests/wp-cache/cache/3fa809751c420c48b2891b7324944b61.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0143,
+  "steps": 71 }

src/plugins/aorai/tests/wp-cache/cache/4077de3226256c1f0564a33d52d92151.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0075,
+  "steps": 24 }

src/plugins/aorai/tests/wp-cache/cache/41005309a48519bd59dd2fa23130790e.json

+{ "prover": "Alt-Ergo:2.4.1", "verdict": "failed" }

src/plugins/aorai/tests/wp-cache/cache/411077bbae4f7bf9fd14802d92927ae7.json

+{ "prover": "Alt-Ergo:2.4.1", "verdict": "failed" }

src/plugins/aorai/tests/wp-cache/cache/4156fe96206dd10741b77d2759efcb23.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0141,
+  "steps": 69 }

src/plugins/aorai/tests/wp-cache/cache/41db58e15630267a6c8bc625aa2cdd3f.json

+{ "prover": "Alt-Ergo:2.4.1", "verdict": "failed" }

src/plugins/aorai/tests/wp-cache/cache/430f02582efbb7818e9c600b1501e9ba.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0154,
+  "steps": 74 }

src/plugins/aorai/tests/wp-cache/cache/43ca1595598616a2791f3d317af998cf.json

+{ "prover": "Alt-Ergo:2.4.1", "verdict": "failed" }

src/plugins/aorai/tests/wp-cache/cache/43dac225eacf5be2e9a81a5773ee1634.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0072,
+  "steps": 10 }

src/plugins/aorai/tests/wp-cache/cache/43f8c5614024a265f29e039c9a12d4c1.json

+{ "prover": "Alt-Ergo:2.4.1", "verdict": "failed" }

src/plugins/aorai/tests/wp-cache/cache/456513f5d9089d089b843bd066ccab04.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0333,
+  "steps": 108 }

src/plugins/aorai/tests/wp-cache/cache/46703b47a2502c6d2807c3a20e641412.json

+{ "prover": "Alt-Ergo:2.4.1", "verdict": "failed" }

src/plugins/aorai/tests/wp-cache/cache/47aa2a8c1b887b5f66e8e70b4b93c50d.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0235,
+  "steps": 180 }

src/plugins/aorai/tests/wp-cache/cache/49b7f29916d634da0d154b4ed4685d84.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0224,
+  "steps": 183 }

src/plugins/aorai/tests/wp-cache/cache/4b4b4267006184ae95f2da988019e1cb.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0069,
+  "steps": 10 }

src/plugins/aorai/tests/wp-cache/cache/4c28ae2fe1a919a4f5018a4f112d31fc.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.3328,
+  "steps": 144 }

src/plugins/aorai/tests/wp-cache/cache/4d2e99cefcde156fbdf0bb25dafe794b.json

+{ "prover": "Alt-Ergo:2.4.1", "verdict": "failed" }

src/plugins/aorai/tests/wp-cache/cache/4d42db0ee74f2d6f27cc8bfcad213e1c.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0077,
+  "steps": 30 }

src/plugins/aorai/tests/wp-cache/cache/4eddb631423a19d9744617a90e34bf9f.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.008,
+  "steps": 41 }