./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_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_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/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_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/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_69263477-98b9-4738-a217-2ba9c67b0311/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 1b548755c8e9cfcfe9ed8b47fb1ac823ac6821056e7770bffa975fdbf413b243 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:24:21,217 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:24:21,378 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:24:21,389 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:24:21,390 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:24:21,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:24:21,443 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:24:21,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:24:21,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:24:21,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:24:21,452 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:24:21,453 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:24:21,454 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:24:21,456 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:24:21,457 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:24:21,457 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:24:21,458 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:24:21,459 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:24:21,459 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:24:21,460 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:24:21,460 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:24:21,461 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:24:21,463 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:24:21,463 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:24:21,464 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:24:21,464 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:24:21,465 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:24:21,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:24:21,466 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:24:21,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:24:21,468 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:24:21,469 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:24:21,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:24:21,469 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:24:21,470 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:24:21,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:24:21,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:24:21,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:24:21,471 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:24:21,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:24:21,472 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:24:21,473 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:24:21,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:24:21,473 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:24:21,474 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:24:21,474 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:24:21,475 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:24:21,475 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_69263477-98b9-4738-a217-2ba9c67b0311/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b548755c8e9cfcfe9ed8b47fb1ac823ac6821056e7770bffa975fdbf413b243 [2023-11-23 21:24:21,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:24:21,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:24:21,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:24:21,885 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:24:21,885 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:24:21,887 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/email_spec0_productSimulator.cil.c [2023-11-23 21:24:25,901 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:24:26,400 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:24:26,401 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/sv-benchmarks/c/product-lines/email_spec0_productSimulator.cil.c [2023-11-23 21:24:26,424 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/data/e43c503e3/b53247a250614446a26e4bd7dfabb41c/FLAG50e38492f [2023-11-23 21:24:26,439 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/data/e43c503e3/b53247a250614446a26e4bd7dfabb41c [2023-11-23 21:24:26,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:24:26,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:24:26,450 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:24:26,450 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:24:26,456 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:24:26,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:26" (1/1) ... [2023-11-23 21:24:26,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c90c7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:26, skipping insertion in model container [2023-11-23 21:24:26,458 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:26" (1/1) ... [2023-11-23 21:24:26,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:24:27,053 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_69263477-98b9-4738-a217-2ba9c67b0311/sv-benchmarks/c/product-lines/email_spec0_productSimulator.cil.c[14867,14880] [2023-11-23 21:24:27,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:24:27,446 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:24:27,460 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [48] [2023-11-23 21:24:27,462 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Client.i","") [168] [2023-11-23 21:24:27,462 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Util.i","") [751] [2023-11-23 21:24:27,463 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [768] [2023-11-23 21:24:27,463 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"ClientLib.i","") [777] [2023-11-23 21:24:27,463 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"EmailLib.i","") [1848] [2023-11-23 21:24:27,464 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2247] [2023-11-23 21:24:27,464 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2608] [2023-11-23 21:24:27,465 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"DecryptForward_spec.i","") [2874] [2023-11-23 21:24:27,465 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Email.i","") [2893] [2023-11-23 21:24:27,465 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3097] [2023-11-23 21:24:27,501 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_69263477-98b9-4738-a217-2ba9c67b0311/sv-benchmarks/c/product-lines/email_spec0_productSimulator.cil.c[14867,14880] [2023-11-23 21:24:27,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:24:27,715 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:27,725 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:24:27,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27 WrapperNode [2023-11-23 21:24:27,726 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:24:27,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:24:27,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:24:27,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:24:27,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:27,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:27,891 INFO L138 Inliner]: procedures = 151, calls = 282, calls flagged for inlining = 67, calls inlined = 64, statements flattened = 1313 [2023-11-23 21:24:27,892 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:24:27,893 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:24:27,894 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:24:27,894 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:24:27,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:27,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:27,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:27,951 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:28,029 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:28,109 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:28,121 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:28,131 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:28,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:24:28,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:24:28,148 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:24:28,148 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:24:28,149 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (1/1) ... [2023-11-23 21:24:28,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:24:28,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:28,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:24:28,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:24:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2023-11-23 21:24:28,243 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2023-11-23 21:24:28,244 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2023-11-23 21:24:28,245 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2023-11-23 21:24:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2023-11-23 21:24:28,246 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2023-11-23 21:24:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2023-11-23 21:24:28,247 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2023-11-23 21:24:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2023-11-23 21:24:28,248 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2023-11-23 21:24:28,249 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2023-11-23 21:24:28,250 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2023-11-23 21:24:28,250 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2023-11-23 21:24:28,250 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2023-11-23 21:24:28,254 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2023-11-23 21:24:28,254 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2023-11-23 21:24:28,254 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2023-11-23 21:24:28,254 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2023-11-23 21:24:28,255 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2023-11-23 21:24:28,255 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2023-11-23 21:24:28,255 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2023-11-23 21:24:28,255 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2023-11-23 21:24:28,255 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2023-11-23 21:24:28,256 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2023-11-23 21:24:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2023-11-23 21:24:28,256 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2023-11-23 21:24:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2023-11-23 21:24:28,256 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2023-11-23 21:24:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2023-11-23 21:24:28,257 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2023-11-23 21:24:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2023-11-23 21:24:28,257 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2023-11-23 21:24:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2023-11-23 21:24:28,258 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2023-11-23 21:24:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2023-11-23 21:24:28,258 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2023-11-23 21:24:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2023-11-23 21:24:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2023-11-23 21:24:28,259 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2023-11-23 21:24:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2023-11-23 21:24:28,259 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2023-11-23 21:24:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2023-11-23 21:24:28,260 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2023-11-23 21:24:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2023-11-23 21:24:28,260 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2023-11-23 21:24:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2023-11-23 21:24:28,261 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2023-11-23 21:24:28,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:24:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2023-11-23 21:24:28,264 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2023-11-23 21:24:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2023-11-23 21:24:28,264 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2023-11-23 21:24:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2023-11-23 21:24:28,264 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2023-11-23 21:24:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2023-11-23 21:24:28,265 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2023-11-23 21:24:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2023-11-23 21:24:28,265 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2023-11-23 21:24:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2023-11-23 21:24:28,267 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2023-11-23 21:24:28,267 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2023-11-23 21:24:28,267 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2023-11-23 21:24:28,267 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2023-11-23 21:24:28,268 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2023-11-23 21:24:28,268 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2023-11-23 21:24:28,268 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2023-11-23 21:24:28,268 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2023-11-23 21:24:28,268 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2023-11-23 21:24:28,269 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2023-11-23 21:24:28,269 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2023-11-23 21:24:28,269 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2023-11-23 21:24:28,270 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2023-11-23 21:24:28,270 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2023-11-23 21:24:28,271 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2023-11-23 21:24:28,271 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2023-11-23 21:24:28,271 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2023-11-23 21:24:28,271 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2023-11-23 21:24:28,271 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2023-11-23 21:24:28,272 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2023-11-23 21:24:28,272 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2023-11-23 21:24:28,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:24:28,272 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2023-11-23 21:24:28,272 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2023-11-23 21:24:28,273 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2023-11-23 21:24:28,273 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2023-11-23 21:24:28,273 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-11-23 21:24:28,273 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-11-23 21:24:28,274 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2023-11-23 21:24:28,274 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2023-11-23 21:24:28,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:24:28,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:24:28,595 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:24:28,600 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:24:29,970 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:24:30,985 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:24:30,985 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:24:30,988 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:30 BoogieIcfgContainer [2023-11-23 21:24:30,988 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:24:30,993 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:24:30,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:24:30,997 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:24:30,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:24:26" (1/3) ... [2023-11-23 21:24:31,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f256f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:30, skipping insertion in model container [2023-11-23 21:24:31,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27" (2/3) ... [2023-11-23 21:24:31,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f256f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:31, skipping insertion in model container [2023-11-23 21:24:31,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:30" (3/3) ... [2023-11-23 21:24:31,005 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec0_productSimulator.cil.c [2023-11-23 21:24:31,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:24:31,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:24:31,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:24:31,151 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;@448c7d6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:24:31,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:24:31,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 223 states have (on average 1.3318385650224216) internal successors, (297), 243 states have internal predecessors, (297), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-23 21:24:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 21:24:31,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:31,216 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-23 21:24:31,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:31,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1241050787, now seen corresponding path program 1 times [2023-11-23 21:24:31,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:31,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083384651] [2023-11-23 21:24:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:31,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-23 21:24:31,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:31,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083384651] [2023-11-23 21:24:31,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083384651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:31,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:31,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:31,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044044828] [2023-11-23 21:24:31,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:31,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:24:31,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:32,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:24:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:24:32,035 INFO L87 Difference]: Start difference. First operand has 377 states, 223 states have (on average 1.3318385650224216) internal successors, (297), 243 states have internal predecessors, (297), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 21:24:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:32,362 INFO L93 Difference]: Finished difference Result 596 states and 810 transitions. [2023-11-23 21:24:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:24:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 139 [2023-11-23 21:24:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:32,406 INFO L225 Difference]: With dead ends: 596 [2023-11-23 21:24:32,406 INFO L226 Difference]: Without dead ends: 374 [2023-11-23 21:24:32,415 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 21:24:32,419 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:32,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 460 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-23 21:24:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2023-11-23 21:24:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 221 states have (on average 1.3167420814479638) internal successors, (291), 240 states have internal predecessors, (291), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-23 21:24:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 508 transitions. [2023-11-23 21:24:32,540 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 508 transitions. Word has length 139 [2023-11-23 21:24:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:32,542 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 508 transitions. [2023-11-23 21:24:32,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 21:24:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 508 transitions. [2023-11-23 21:24:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 21:24:32,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:32,565 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-23 21:24:32,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:24:32,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:32,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash 410421601, now seen corresponding path program 1 times [2023-11-23 21:24:32,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:32,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381657175] [2023-11-23 21:24:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:32,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-23 21:24:33,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381657175] [2023-11-23 21:24:33,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381657175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:33,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:33,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:33,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969400213] [2023-11-23 21:24:33,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:33,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:33,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:33,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:33,054 INFO L87 Difference]: Start difference. First operand 374 states and 508 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 21:24:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:33,253 INFO L93 Difference]: Finished difference Result 592 states and 786 transitions. [2023-11-23 21:24:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:33,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 145 [2023-11-23 21:24:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:33,270 INFO L225 Difference]: With dead ends: 592 [2023-11-23 21:24:33,270 INFO L226 Difference]: Without dead ends: 376 [2023-11-23 21:24:33,278 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 21:24:33,282 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 0 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:33,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 913 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-23 21:24:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2023-11-23 21:24:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 223 states have (on average 1.3139013452914798) internal successors, (293), 242 states have internal predecessors, (293), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-23 21:24:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 510 transitions. [2023-11-23 21:24:33,374 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 510 transitions. Word has length 145 [2023-11-23 21:24:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:33,376 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 510 transitions. [2023-11-23 21:24:33,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 21:24:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 510 transitions. [2023-11-23 21:24:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-23 21:24:33,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:33,384 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-23 21:24:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:24:33,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:33,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash 100790122, now seen corresponding path program 1 times [2023-11-23 21:24:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:33,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463597889] [2023-11-23 21:24:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:33,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-23 21:24:33,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463597889] [2023-11-23 21:24:33,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463597889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:33,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:33,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:33,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608702649] [2023-11-23 21:24:33,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:33,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:33,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:33,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:33,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:33,650 INFO L87 Difference]: Start difference. First operand 376 states and 510 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 21:24:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:33,846 INFO L93 Difference]: Finished difference Result 751 states and 1034 transitions. [2023-11-23 21:24:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:33,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 150 [2023-11-23 21:24:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:33,854 INFO L225 Difference]: With dead ends: 751 [2023-11-23 21:24:33,854 INFO L226 Difference]: Without dead ends: 443 [2023-11-23 21:24:33,859 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 21:24:33,865 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 84 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:33,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 917 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-23 21:24:33,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 438. [2023-11-23 21:24:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 271 states have (on average 1.3653136531365313) internal successors, (370), 292 states have internal predecessors, (370), 123 states have call successors, (123), 43 states have call predecessors, (123), 43 states have return successors, (122), 121 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-23 21:24:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 615 transitions. [2023-11-23 21:24:33,903 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 615 transitions. Word has length 150 [2023-11-23 21:24:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:33,904 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 615 transitions. [2023-11-23 21:24:33,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 21:24:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 615 transitions. [2023-11-23 21:24:33,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-23 21:24:33,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:33,908 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 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] [2023-11-23 21:24:33,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:24:33,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:33,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:33,909 INFO L85 PathProgramCache]: Analyzing trace with hash -325941049, now seen corresponding path program 1 times [2023-11-23 21:24:33,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:33,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533195516] [2023-11-23 21:24:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:33,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:24:34,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:34,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533195516] [2023-11-23 21:24:34,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533195516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:34,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097145848] [2023-11-23 21:24:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:34,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:34,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:34,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:34,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:24:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:34,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:34,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:24:34,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:34,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097145848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:34,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:34,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 21:24:34,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045279627] [2023-11-23 21:24:34,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:34,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:34,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:34,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:34,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:34,953 INFO L87 Difference]: Start difference. First operand 438 states and 615 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:24:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:35,299 INFO L93 Difference]: Finished difference Result 1243 states and 1795 transitions. [2023-11-23 21:24:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:35,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2023-11-23 21:24:35,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:35,309 INFO L225 Difference]: With dead ends: 1243 [2023-11-23 21:24:35,310 INFO L226 Difference]: Without dead ends: 830 [2023-11-23 21:24:35,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 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 21:24:35,314 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 426 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:35,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 962 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:24:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-11-23 21:24:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 828. [2023-11-23 21:24:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 517 states have (on average 1.3636363636363635) internal successors, (705), 554 states have internal predecessors, (705), 225 states have call successors, (225), 85 states have call predecessors, (225), 85 states have return successors, (244), 223 states have call predecessors, (244), 223 states have call successors, (244) [2023-11-23 21:24:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1174 transitions. [2023-11-23 21:24:35,396 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1174 transitions. Word has length 134 [2023-11-23 21:24:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:35,397 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1174 transitions. [2023-11-23 21:24:35,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:24:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1174 transitions. [2023-11-23 21:24:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-23 21:24:35,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:35,407 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 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] [2023-11-23 21:24:35,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:24:35,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:35,623 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:35,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2062582485, now seen corresponding path program 1 times [2023-11-23 21:24:35,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:35,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241594012] [2023-11-23 21:24:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:35,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:24:35,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241594012] [2023-11-23 21:24:35,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241594012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927065548] [2023-11-23 21:24:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:35,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:35,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:35,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:35,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:24:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:36,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:36,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:24:36,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:36,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927065548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:36,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:36,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 21:24:36,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897735256] [2023-11-23 21:24:36,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:36,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:36,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:36,580 INFO L87 Difference]: Start difference. First operand 828 states and 1174 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:24:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:36,919 INFO L93 Difference]: Finished difference Result 2180 states and 3121 transitions. [2023-11-23 21:24:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 135 [2023-11-23 21:24:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:36,940 INFO L225 Difference]: With dead ends: 2180 [2023-11-23 21:24:36,941 INFO L226 Difference]: Without dead ends: 1582 [2023-11-23 21:24:36,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 135 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 21:24:36,949 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 419 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:36,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1164 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2023-11-23 21:24:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1580. [2023-11-23 21:24:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 988 states have (on average 1.3593117408906883) internal successors, (1343), 1056 states have internal predecessors, (1343), 426 states have call successors, (426), 165 states have call predecessors, (426), 165 states have return successors, (489), 422 states have call predecessors, (489), 422 states have call successors, (489) [2023-11-23 21:24:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2258 transitions. [2023-11-23 21:24:37,134 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2258 transitions. Word has length 135 [2023-11-23 21:24:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:37,136 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2258 transitions. [2023-11-23 21:24:37,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:24:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2258 transitions. [2023-11-23 21:24:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 21:24:37,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:37,148 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 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] [2023-11-23 21:24:37,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:37,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:37,363 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:37,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2044469276, now seen corresponding path program 1 times [2023-11-23 21:24:37,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:37,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207017037] [2023-11-23 21:24:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:37,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:24:37,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207017037] [2023-11-23 21:24:37,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207017037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140890020] [2023-11-23 21:24:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:37,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:37,634 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:37,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:24:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:38,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:38,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:24:38,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:38,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140890020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:38,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:38,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 21:24:38,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832979958] [2023-11-23 21:24:38,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:38,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:38,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:38,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:38,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:38,196 INFO L87 Difference]: Start difference. First operand 1580 states and 2258 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:24:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:38,681 INFO L93 Difference]: Finished difference Result 4213 states and 6169 transitions. [2023-11-23 21:24:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 137 [2023-11-23 21:24:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:38,711 INFO L225 Difference]: With dead ends: 4213 [2023-11-23 21:24:38,711 INFO L226 Difference]: Without dead ends: 2877 [2023-11-23 21:24:38,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 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 21:24:38,721 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 422 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:38,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1118 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2023-11-23 21:24:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2875. [2023-11-23 21:24:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 1794 states have (on average 1.3433667781493868) internal successors, (2410), 1906 states have internal predecessors, (2410), 765 states have call successors, (765), 314 states have call predecessors, (765), 315 states have return successors, (977), 763 states have call predecessors, (977), 757 states have call successors, (977) [2023-11-23 21:24:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 4152 transitions. [2023-11-23 21:24:38,955 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 4152 transitions. Word has length 137 [2023-11-23 21:24:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:38,955 INFO L495 AbstractCegarLoop]: Abstraction has 2875 states and 4152 transitions. [2023-11-23 21:24:38,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:24:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 4152 transitions. [2023-11-23 21:24:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:24:38,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:38,970 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 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] [2023-11-23 21:24:38,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:39,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:39,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:39,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash 472771109, now seen corresponding path program 1 times [2023-11-23 21:24:39,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:39,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544315917] [2023-11-23 21:24:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:39,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:24:39,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:39,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544315917] [2023-11-23 21:24:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544315917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:39,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270922202] [2023-11-23 21:24:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:39,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:39,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:39,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:39,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:24:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:39,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:39,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:24:40,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:40,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270922202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:40,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:40,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 21:24:40,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956208416] [2023-11-23 21:24:40,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:40,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:40,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:40,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:40,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:40,127 INFO L87 Difference]: Start difference. First operand 2875 states and 4152 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:24:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:40,731 INFO L93 Difference]: Finished difference Result 7323 states and 11127 transitions. [2023-11-23 21:24:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 138 [2023-11-23 21:24:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:40,850 INFO L225 Difference]: With dead ends: 7323 [2023-11-23 21:24:40,851 INFO L226 Difference]: Without dead ends: 5289 [2023-11-23 21:24:40,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 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 21:24:40,868 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 394 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:40,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1195 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2023-11-23 21:24:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 5287. [2023-11-23 21:24:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5287 states, 3294 states have (on average 1.333940497874924) internal successors, (4394), 3478 states have internal predecessors, (4394), 1391 states have call successors, (1391), 598 states have call predecessors, (1391), 601 states have return successors, (1995), 1397 states have call predecessors, (1995), 1369 states have call successors, (1995) [2023-11-23 21:24:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5287 states to 5287 states and 7780 transitions. [2023-11-23 21:24:41,447 INFO L78 Accepts]: Start accepts. Automaton has 5287 states and 7780 transitions. Word has length 138 [2023-11-23 21:24:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:41,448 INFO L495 AbstractCegarLoop]: Abstraction has 5287 states and 7780 transitions. [2023-11-23 21:24:41,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:24:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5287 states and 7780 transitions. [2023-11-23 21:24:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 21:24:41,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:41,477 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 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] [2023-11-23 21:24:41,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:41,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:41,691 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__VerifyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:41,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1806688531, now seen corresponding path program 1 times [2023-11-23 21:24:41,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:41,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034706490] [2023-11-23 21:24:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:41,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:24:41,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:41,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034706490] [2023-11-23 21:24:41,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034706490] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:41,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296597925] [2023-11-23 21:24:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:41,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:41,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:41,927 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:41,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69263477-98b9-4738-a217-2ba9c67b0311/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:24:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:42,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:42,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:24:42,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:24:42,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296597925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:42,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214762090] [2023-11-23 21:24:42,633 INFO L159 IcfgInterpreter]: Started Sifa with 116 locations of interest [2023-11-23 21:24:42,633 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:42,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:42,645 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:42,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs