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

src/plugins/aorai/tests/wp-cache/cache/1ad378eaacce63df3690b6438cbb9401.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.3342,
+  "steps": 46 }

src/plugins/aorai/tests/wp-cache/cache/1c2226e80d6336af15b3fedcc8638ed7.json

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

src/plugins/aorai/tests/wp-cache/cache/1d6462b015d50eea1828baa225e26abd.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.007,
+  "steps": 18 }

src/plugins/aorai/tests/wp-cache/cache/1dc0a38bfa733651922ef4b8809fcd7c.json

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

src/plugins/aorai/tests/wp-cache/cache/1e646eeb23619a4a3c8a39cb8c69bf91.json

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

src/plugins/aorai/tests/wp-cache/cache/2025ace84b8a17266d098ce247e7681e.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.014,
+  "steps": 100 }

src/plugins/aorai/tests/wp-cache/cache/20a3620487b8331dd3c1fb951a5a4288.json

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

src/plugins/aorai/tests/wp-cache/cache/20d1ebef4d608c26bd1bce69ca9bd6c9.json

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

src/plugins/aorai/tests/wp-cache/cache/216163eeac3a7175a63830d50bce3adf.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0072,
+  "steps": 22 }

src/plugins/aorai/tests/wp-cache/cache/216b26e7db2bc43b2324cdbc4a61dafd.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0087,
+  "steps": 42 }

src/plugins/aorai/tests/wp-cache/cache/237a03d457b0c98adef85631d48bb0a7.json

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

src/plugins/aorai/tests/wp-cache/cache/2408ad55267027177267a51bca4cb350.json

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

src/plugins/aorai/tests/wp-cache/cache/24161f0106f7623bad68ef02aa5003d0.json

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

src/plugins/aorai/tests/wp-cache/cache/250587204e2d3b7692cd255a4203ffb3.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0165,
+  "steps": 109 }

src/plugins/aorai/tests/wp-cache/cache/2574fa59afdbfd58548680adc591cd4c.json

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

src/plugins/aorai/tests/wp-cache/cache/25987627da982182b6d519adbf5eccaa.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0161,
+  "steps": 110 }

src/plugins/aorai/tests/wp-cache/cache/2831bbea1809ed9cf5da14c79e164f34.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0071,
+  "steps": 10 }

src/plugins/aorai/tests/wp-cache/cache/2881e4f936ca24499fe4a8b6e035fb10.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0041,
+  "steps": 18 }

src/plugins/aorai/tests/wp-cache/cache/2949f4c3c49832259c89ac0ba32d22f7.json

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

src/plugins/aorai/tests/wp-cache/cache/299b41e52b0f0caed793e2a6da18b1fe.json

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