Create model_checker.js

blockchain_integration/pi_network/PiShield/formal-verifier/model_checker.js

@@ -0,0 +1,43 @@
+// model_checker.js
+
+const { Z3 } = require('z3-js');
+
+class ModelChecker {
+  constructor(config) {
+    this.config = config;
+    this.z3 = new Z3();
+  }
+
+  async checkModel(model, properties) {
+    const ctx = this.z3.context;
+    const solver = ctx.mkSolver();
+    solver.add(model);
+    for (const property of properties) {
+      solver.add(ctx.mkNot(property));
+    }
+    const result = solver.check();
+    if (result === 'sat') {
+      return { result: 'invalid', counterexample: solver.getModel() };
+    } else if (result === 'unsat') {
+      return { result: 'valid' };
+    } else {
+      return { result: 'unknown' };
+    }
+  }
+
+  async generateModel(properties) {
+    const ctx = this.z3.context;
+    const solver = ctx.mkSolver();
+    for (const property of properties) {
+      solver.add(property);
+    }
+    const result = solver.check();
+    if (result === 'sat') {
+      return solver.getModel();
+    } else {
+      return null;
+    }
+  }
+}
+
+module.exports = ModelChecker;