./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe4506e3d5e012e1662dc0aa7741c8e3f8f99dc7c5ccf1f202c2f95071bfbf64 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:19:00,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:19:00,271 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:19:00,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:19:00,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:19:00,316 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:19:00,317 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:19:00,318 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:19:00,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:19:00,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:19:00,324 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:19:00,325 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:19:00,326 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:19:00,327 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:19:00,328 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:19:00,328 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:19:00,328 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:19:00,329 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:19:00,329 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:19:00,331 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:19:00,331 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:19:00,332 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:19:00,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:19:00,333 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:19:00,334 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:19:00,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:19:00,334 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:19:00,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:19:00,335 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:19:00,335 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:19:00,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:19:00,337 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:19:00,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:19:00,337 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:19:00,337 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:19:00,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:19:00,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:19:00,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:00,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:19:00,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:19:00,339 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:19:00,340 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:19:00,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:19:00,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:19:00,341 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:19:00,341 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:19:00,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:19:00,341 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe4506e3d5e012e1662dc0aa7741c8e3f8f99dc7c5ccf1f202c2f95071bfbf64 [2023-11-23 21:19:00,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:19:00,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:19:00,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:19:00,615 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:19:00,616 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:19:00,617 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c [2023-11-23 21:19:03,857 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:19:04,287 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:19:04,294 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c [2023-11-23 21:19:04,334 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/data/8d24cacce/b317e8758f1c4fd1bc3e9ec829435dd0/FLAG67c877b98 [2023-11-23 21:19:04,350 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/data/8d24cacce/b317e8758f1c4fd1bc3e9ec829435dd0 [2023-11-23 21:19:04,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:19:04,357 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:19:04,362 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:04,363 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:19:04,369 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:19:04,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:04" (1/1) ... [2023-11-23 21:19:04,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16567601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:04, skipping insertion in model container [2023-11-23 21:19:04,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:04" (1/1) ... [2023-11-23 21:19:04,481 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:19:04,763 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c[11237,11250] [2023-11-23 21:19:05,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:05,282 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:19:05,293 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2023-11-23 21:19:05,294 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [414] [2023-11-23 21:19:05,294 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Util.i","") [423] [2023-11-23 21:19:05,294 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [441] [2023-11-23 21:19:05,295 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"ClientLib.i","") [561] [2023-11-23 21:19:05,295 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1641] [2023-11-23 21:19:05,296 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"VerifyForward_spec.i","") [1918] [2023-11-23 21:19:05,296 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"EmailLib.i","") [1952] [2023-11-23 21:19:05,297 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Client.i","") [2362] [2023-11-23 21:19:05,297 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2922] [2023-11-23 21:19:05,297 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Email.i","") [3271] [2023-11-23 21:19:05,348 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c[11237,11250] [2023-11-23 21:19:05,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:05,533 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:19:05,542 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:19:05,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05 WrapperNode [2023-11-23 21:19:05,543 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:05,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:05,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:19:05,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:19:05,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,589 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,678 INFO L138 Inliner]: procedures = 151, calls = 284, calls flagged for inlining = 66, calls inlined = 63, statements flattened = 1314 [2023-11-23 21:19:05,679 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:05,680 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:19:05,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:19:05,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:19:05,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,718 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,781 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,799 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,830 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:19:05,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:19:05,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:19:05,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:19:05,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (1/1) ... [2023-11-23 21:19:05,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:05,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:05,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:19:05,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:19:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2023-11-23 21:19:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2023-11-23 21:19:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2023-11-23 21:19:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2023-11-23 21:19:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2023-11-23 21:19:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2023-11-23 21:19:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2023-11-23 21:19:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2023-11-23 21:19:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2023-11-23 21:19:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2023-11-23 21:19:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2023-11-23 21:19:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2023-11-23 21:19:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2023-11-23 21:19:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2023-11-23 21:19:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2023-11-23 21:19:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2023-11-23 21:19:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2023-11-23 21:19:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2023-11-23 21:19:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2023-11-23 21:19:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2023-11-23 21:19:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2023-11-23 21:19:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2023-11-23 21:19:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2023-11-23 21:19:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2023-11-23 21:19:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2023-11-23 21:19:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2023-11-23 21:19:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2023-11-23 21:19:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2023-11-23 21:19:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2023-11-23 21:19:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2023-11-23 21:19:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2023-11-23 21:19:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2023-11-23 21:19:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2023-11-23 21:19:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2023-11-23 21:19:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2023-11-23 21:19:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2023-11-23 21:19:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2023-11-23 21:19:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2023-11-23 21:19:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2023-11-23 21:19:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2023-11-23 21:19:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2023-11-23 21:19:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2023-11-23 21:19:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2023-11-23 21:19:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2023-11-23 21:19:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2023-11-23 21:19:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2023-11-23 21:19:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2023-11-23 21:19:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:19:05,936 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2023-11-23 21:19:05,936 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2023-11-23 21:19:05,936 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2023-11-23 21:19:05,936 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2023-11-23 21:19:05,936 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2023-11-23 21:19:05,936 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2023-11-23 21:19:05,937 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2023-11-23 21:19:05,937 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2023-11-23 21:19:05,937 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2023-11-23 21:19:05,937 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2023-11-23 21:19:05,937 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2023-11-23 21:19:05,937 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2023-11-23 21:19:05,938 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2023-11-23 21:19:05,938 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2023-11-23 21:19:05,938 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2023-11-23 21:19:05,938 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2023-11-23 21:19:05,938 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2023-11-23 21:19:05,938 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2023-11-23 21:19:05,938 INFO L130 BoogieDeclarations]: Found specification of procedure isVerified [2023-11-23 21:19:05,939 INFO L138 BoogieDeclarations]: Found implementation of procedure isVerified [2023-11-23 21:19:05,939 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2023-11-23 21:19:05,939 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2023-11-23 21:19:05,939 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2023-11-23 21:19:05,939 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2023-11-23 21:19:05,939 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2023-11-23 21:19:05,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2023-11-23 21:19:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2023-11-23 21:19:05,940 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2023-11-23 21:19:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2023-11-23 21:19:05,940 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2023-11-23 21:19:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2023-11-23 21:19:05,940 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2023-11-23 21:19:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2023-11-23 21:19:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2023-11-23 21:19:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:19:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2023-11-23 21:19:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2023-11-23 21:19:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2023-11-23 21:19:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2023-11-23 21:19:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-11-23 21:19:05,942 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-11-23 21:19:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2023-11-23 21:19:05,942 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2023-11-23 21:19:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:19:05,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:19:06,243 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:19:06,246 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:19:07,342 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:19:08,167 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:19:08,168 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:19:08,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:08 BoogieIcfgContainer [2023-11-23 21:19:08,170 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:19:08,174 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:19:08,174 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:19:08,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:19:08,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:04" (1/3) ... [2023-11-23 21:19:08,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a986dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:08, skipping insertion in model container [2023-11-23 21:19:08,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05" (2/3) ... [2023-11-23 21:19:08,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a986dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:08, skipping insertion in model container [2023-11-23 21:19:08,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:08" (3/3) ... [2023-11-23 21:19:08,182 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec27_productSimulator.cil.c [2023-11-23 21:19:08,206 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:19:08,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:19:08,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:19:08,288 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f29a96f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:19:08,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:19:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 385 states, 227 states have (on average 1.330396475770925) internal successors, (302), 247 states have internal predecessors, (302), 112 states have call successors, (112), 44 states have call predecessors, (112), 44 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-23 21:19:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-23 21:19:08,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:08,325 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:08,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:08,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1040095836, now seen corresponding path program 1 times [2023-11-23 21:19:08,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:08,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896232838] [2023-11-23 21:19:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:08,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:19:08,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:08,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896232838] [2023-11-23 21:19:08,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896232838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:08,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:08,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:19:08,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016061205] [2023-11-23 21:19:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:08,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:19:08,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:08,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:19:08,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:19:08,977 INFO L87 Difference]: Start difference. First operand has 385 states, 227 states have (on average 1.330396475770925) internal successors, (302), 247 states have internal predecessors, (302), 112 states have call successors, (112), 44 states have call predecessors, (112), 44 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:19:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:09,222 INFO L93 Difference]: Finished difference Result 612 states and 836 transitions. [2023-11-23 21:19:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:19:09,229 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 121 [2023-11-23 21:19:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:09,252 INFO L225 Difference]: With dead ends: 612 [2023-11-23 21:19:09,252 INFO L226 Difference]: Without dead ends: 382 [2023-11-23 21:19:09,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:19:09,264 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:09,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 470 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:19:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-23 21:19:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2023-11-23 21:19:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 225 states have (on average 1.3155555555555556) internal successors, (296), 244 states have internal predecessors, (296), 112 states have call successors, (112), 44 states have call predecessors, (112), 44 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-23 21:19:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 519 transitions. [2023-11-23 21:19:09,378 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 519 transitions. Word has length 121 [2023-11-23 21:19:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:09,380 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 519 transitions. [2023-11-23 21:19:09,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:19:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 519 transitions. [2023-11-23 21:19:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-23 21:19:09,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:09,389 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:09,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:19:09,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:09,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:09,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1079017328, now seen corresponding path program 1 times [2023-11-23 21:19:09,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:09,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119025392] [2023-11-23 21:19:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:09,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:19:09,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:09,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119025392] [2023-11-23 21:19:09,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119025392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:09,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:09,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:19:09,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907444092] [2023-11-23 21:19:09,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:09,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:09,971 INFO L87 Difference]: Start difference. First operand 382 states and 519 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:19:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:10,177 INFO L93 Difference]: Finished difference Result 608 states and 808 transitions. [2023-11-23 21:19:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:10,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 122 [2023-11-23 21:19:10,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:10,185 INFO L225 Difference]: With dead ends: 608 [2023-11-23 21:19:10,186 INFO L226 Difference]: Without dead ends: 384 [2023-11-23 21:19:10,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:10,195 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 0 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:10,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 933 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:19:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-23 21:19:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2023-11-23 21:19:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 227 states have (on average 1.3127753303964758) internal successors, (298), 246 states have internal predecessors, (298), 112 states have call successors, (112), 44 states have call predecessors, (112), 44 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-23 21:19:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 521 transitions. [2023-11-23 21:19:10,254 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 521 transitions. Word has length 122 [2023-11-23 21:19:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:10,257 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 521 transitions. [2023-11-23 21:19:10,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:19:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 521 transitions. [2023-11-23 21:19:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-23 21:19:10,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:10,268 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:10,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:19:10,269 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:10,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash 713467131, now seen corresponding path program 1 times [2023-11-23 21:19:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:10,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130579470] [2023-11-23 21:19:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:10,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:19:10,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130579470] [2023-11-23 21:19:10,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130579470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:10,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:10,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:19:10,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019890540] [2023-11-23 21:19:10,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:10,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:10,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:10,539 INFO L87 Difference]: Start difference. First operand 384 states and 521 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:19:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:10,722 INFO L93 Difference]: Finished difference Result 767 states and 1056 transitions. [2023-11-23 21:19:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 127 [2023-11-23 21:19:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:10,728 INFO L225 Difference]: With dead ends: 767 [2023-11-23 21:19:10,728 INFO L226 Difference]: Without dead ends: 451 [2023-11-23 21:19:10,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:10,731 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 84 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:10,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 936 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:19:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-11-23 21:19:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 446. [2023-11-23 21:19:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 275 states have (on average 1.3636363636363635) internal successors, (375), 296 states have internal predecessors, (375), 126 states have call successors, (126), 44 states have call predecessors, (126), 44 states have return successors, (125), 124 states have call predecessors, (125), 125 states have call successors, (125) [2023-11-23 21:19:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 626 transitions. [2023-11-23 21:19:10,766 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 626 transitions. Word has length 127 [2023-11-23 21:19:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:10,767 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 626 transitions. [2023-11-23 21:19:10,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:19:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 626 transitions. [2023-11-23 21:19:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-23 21:19:10,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:10,771 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:10,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:19:10,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:10,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:10,773 INFO L85 PathProgramCache]: Analyzing trace with hash -5780264, now seen corresponding path program 1 times [2023-11-23 21:19:10,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:10,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132218189] [2023-11-23 21:19:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:10,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:19:11,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:11,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132218189] [2023-11-23 21:19:11,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132218189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:11,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830481764] [2023-11-23 21:19:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:11,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:11,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:11,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:11,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:19:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:11,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:19:11,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-23 21:19:11,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:11,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830481764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:11,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:11,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 21:19:11,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080543961] [2023-11-23 21:19:11,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:11,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:11,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:11,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:11,715 INFO L87 Difference]: Start difference. First operand 446 states and 626 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 21:19:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:11,853 INFO L93 Difference]: Finished difference Result 863 states and 1216 transitions. [2023-11-23 21:19:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:11,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 128 [2023-11-23 21:19:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:11,860 INFO L225 Difference]: With dead ends: 863 [2023-11-23 21:19:11,860 INFO L226 Difference]: Without dead ends: 446 [2023-11-23 21:19:11,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:11,870 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 418 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:11,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 475 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:19:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-23 21:19:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2023-11-23 21:19:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 276 states have (on average 1.3478260869565217) internal successors, (372), 295 states have internal predecessors, (372), 124 states have call successors, (124), 45 states have call predecessors, (124), 45 states have return successors, (123), 122 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-23 21:19:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 619 transitions. [2023-11-23 21:19:11,908 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 619 transitions. Word has length 128 [2023-11-23 21:19:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:11,909 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 619 transitions. [2023-11-23 21:19:11,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 21:19:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 619 transitions. [2023-11-23 21:19:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 21:19:11,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:11,914 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:11,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:12,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:12,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:12,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:12,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1939971001, now seen corresponding path program 1 times [2023-11-23 21:19:12,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:12,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165778908] [2023-11-23 21:19:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:12,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:19:12,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165778908] [2023-11-23 21:19:12,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165778908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714555749] [2023-11-23 21:19:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:12,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:12,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:12,398 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:12,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:19:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:12,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:19:12,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:19:12,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:12,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714555749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:12,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:12,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 21:19:12,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19092143] [2023-11-23 21:19:12,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:12,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:12,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:12,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:12,965 INFO L87 Difference]: Start difference. First operand 446 states and 619 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-23 21:19:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:13,240 INFO L93 Difference]: Finished difference Result 1263 states and 1797 transitions. [2023-11-23 21:19:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:13,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 145 [2023-11-23 21:19:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:13,248 INFO L225 Difference]: With dead ends: 1263 [2023-11-23 21:19:13,248 INFO L226 Difference]: Without dead ends: 844 [2023-11-23 21:19:13,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:13,251 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 427 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:13,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 948 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:19:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2023-11-23 21:19:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 842. [2023-11-23 21:19:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 526 states have (on average 1.3460076045627376) internal successors, (708), 559 states have internal predecessors, (708), 227 states have call successors, (227), 88 states have call predecessors, (227), 88 states have return successors, (243), 225 states have call predecessors, (243), 225 states have call successors, (243) [2023-11-23 21:19:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1178 transitions. [2023-11-23 21:19:13,347 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1178 transitions. Word has length 145 [2023-11-23 21:19:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:13,348 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1178 transitions. [2023-11-23 21:19:13,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-23 21:19:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1178 transitions. [2023-11-23 21:19:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 21:19:13,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:13,355 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:13,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:13,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:13,578 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:13,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1426516938, now seen corresponding path program 1 times [2023-11-23 21:19:13,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:13,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742727142] [2023-11-23 21:19:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:13,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:19:13,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:13,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742727142] [2023-11-23 21:19:13,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742727142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:13,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199646907] [2023-11-23 21:19:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:13,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:13,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:13,895 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:13,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab095c-9e89-4e31-bae9-93282a06e8b5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:19:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:14,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:19:14,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:19:14,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:19:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:19:14,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199646907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:19:14,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935078840] [2023-11-23 21:19:14,562 INFO L159 IcfgInterpreter]: Started Sifa with 125 locations of interest [2023-11-23 21:19:14,562 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:19:14,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:19:14,575 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:19:14,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:19:53,476 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 498 for LOIs [2023-11-23 21:19:55,239 INFO L180 IcfgInterpreter]: Interpretation finished