./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje --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 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:27:54,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:27:54,845 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:27:54,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:27:54,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:27:54,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:27:54,892 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:27:54,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:27:54,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:27:54,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:27:54,897 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:27:54,897 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:27:54,897 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:27:54,898 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:27:54,898 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:27:54,898 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:27:54,899 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:27:54,899 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:27:54,899 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:27:54,900 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:27:54,903 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:27:54,905 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:27:54,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:27:54,908 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:27:54,908 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:27:54,908 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:27:54,909 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:27:54,909 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:27:54,909 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:27:54,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:27:54,910 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:27:54,910 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:27:54,910 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:27:54,910 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:27:54,911 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:27:54,911 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:27:54,911 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:27:54,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:27:54,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:27:54,913 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:27:54,913 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:27:54,914 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:27:54,914 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:27:54,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:27:54,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:27:54,915 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:27:54,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:27:54,915 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_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 [2024-11-09 05:27:55,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:27:55,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:27:55,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:27:55,293 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:27:55,294 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:27:55,295 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c Unable to find full path for "g++" [2024-11-09 05:27:57,335 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:27:57,649 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:27:57,649 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2024-11-09 05:27:57,678 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/data/de392fd43/161fbc4ea34543d4af0f6b608637e6ab/FLAGb19305c74 [2024-11-09 05:27:57,899 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/data/de392fd43/161fbc4ea34543d4af0f6b608637e6ab [2024-11-09 05:27:57,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:27:57,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:27:57,904 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:27:57,904 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:27:57,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:27:57,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:27:57" (1/1) ... [2024-11-09 05:27:57,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0d9ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:57, skipping insertion in model container [2024-11-09 05:27:57,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:27:57" (1/1) ... [2024-11-09 05:27:57,979 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:27:58,245 WARN L250 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_95e4c2f2-b37c-4996-957f-f480af2f0825/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2024-11-09 05:27:58,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:27:58,674 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:27:58,685 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [48] [2024-11-09 05:27:58,687 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [150] [2024-11-09 05:27:58,687 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [159] [2024-11-09 05:27:58,688 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [525] [2024-11-09 05:27:58,689 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [563] [2024-11-09 05:27:58,689 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [752] [2024-11-09 05:27:58,689 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1102] [2024-11-09 05:27:58,690 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1769] [2024-11-09 05:27:58,690 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1784] [2024-11-09 05:27:58,690 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1904] [2024-11-09 05:27:58,698 WARN L250 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_95e4c2f2-b37c-4996-957f-f480af2f0825/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2024-11-09 05:27:58,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:27:58,844 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:27:58,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58 WrapperNode [2024-11-09 05:27:58,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:27:58,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:27:58,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:27:58,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:27:58,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:58,891 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:58,960 INFO L138 Inliner]: procedures = 92, calls = 351, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 903 [2024-11-09 05:27:58,960 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:27:58,964 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:27:58,965 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:27:58,965 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:27:58,977 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:58,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:58,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:58,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:59,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:59,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:59,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:59,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:59,055 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:27:59,056 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:27:59,056 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:27:59,056 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:27:59,057 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (1/1) ... [2024-11-09 05:27:59,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:27:59,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:59,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:27:59,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:27:59,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:27:59,201 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-09 05:27:59,201 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-09 05:27:59,201 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-09 05:27:59,201 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-09 05:27:59,201 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-09 05:27:59,202 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-09 05:27:59,202 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-09 05:27:59,202 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-09 05:27:59,202 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-09 05:27:59,202 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-09 05:27:59,202 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-09 05:27:59,202 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-09 05:27:59,203 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-09 05:27:59,203 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-09 05:27:59,203 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-09 05:27:59,203 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-09 05:27:59,203 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-09 05:27:59,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-09 05:27:59,203 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-09 05:27:59,204 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-09 05:27:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-09 05:27:59,204 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-09 05:27:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-09 05:27:59,204 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-09 05:27:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-09 05:27:59,204 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-09 05:27:59,205 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-09 05:27:59,207 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-09 05:27:59,207 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-09 05:27:59,207 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-09 05:27:59,207 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-09 05:27:59,207 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-09 05:27:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-09 05:27:59,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-09 05:27:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-09 05:27:59,208 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-09 05:27:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-09 05:27:59,208 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-09 05:27:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-09 05:27:59,209 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-09 05:27:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:27:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-09 05:27:59,210 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-09 05:27:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-09 05:27:59,210 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-09 05:27:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-09 05:27:59,236 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-09 05:27:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-09 05:27:59,236 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-09 05:27:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2024-11-09 05:27:59,236 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2024-11-09 05:27:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2024-11-09 05:27:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2024-11-09 05:27:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:27:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:27:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-09 05:27:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-09 05:27:59,452 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:27:59,458 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:28:01,022 INFO L? ?]: Removed 462 outVars from TransFormulas that were not future-live. [2024-11-09 05:28:01,022 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:28:01,990 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:28:01,990 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 05:28:01,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:28:01 BoogieIcfgContainer [2024-11-09 05:28:01,991 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:28:01,992 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:28:01,992 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:28:01,998 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:28:01,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:27:57" (1/3) ... [2024-11-09 05:28:02,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23918061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:28:01, skipping insertion in model container [2024-11-09 05:28:02,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:58" (2/3) ... [2024-11-09 05:28:02,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23918061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:28:02, skipping insertion in model container [2024-11-09 05:28:02,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:28:01" (3/3) ... [2024-11-09 05:28:02,001 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2024-11-09 05:28:02,021 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:28:02,022 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:28:02,118 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:28:02,126 INFO L333 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, 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;@4efda4e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:28:02,126 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:28:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-09 05:28:02,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 05:28:02,144 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:02,145 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 05:28:02,145 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:02,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:02,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1914818770, now seen corresponding path program 1 times [2024-11-09 05:28:02,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:02,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672359753] [2024-11-09 05:28:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:02,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:03,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:03,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672359753] [2024-11-09 05:28:03,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672359753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:03,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:03,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:28:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734898989] [2024-11-09 05:28:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:03,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:28:03,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:03,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:28:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:03,137 INFO L87 Difference]: Start difference. First operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:28:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:04,581 INFO L93 Difference]: Finished difference Result 1159 states and 1854 transitions. [2024-11-09 05:28:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:28:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2024-11-09 05:28:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:04,605 INFO L225 Difference]: With dead ends: 1159 [2024-11-09 05:28:04,605 INFO L226 Difference]: Without dead ends: 750 [2024-11-09 05:28:04,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:28:04,618 INFO L432 NwaCegarLoop]: 626 mSDtfsCounter, 528 mSDsluCounter, 2201 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:04,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 2827 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 05:28:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2024-11-09 05:28:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 743. [2024-11-09 05:28:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 497 states have (on average 1.5010060362173039) internal successors, (746), 531 states have internal predecessors, (746), 198 states have call successors, (198), 51 states have call predecessors, (198), 47 states have return successors, (201), 187 states have call predecessors, (201), 194 states have call successors, (201) [2024-11-09 05:28:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1145 transitions. [2024-11-09 05:28:04,731 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1145 transitions. Word has length 49 [2024-11-09 05:28:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:04,731 INFO L471 AbstractCegarLoop]: Abstraction has 743 states and 1145 transitions. [2024-11-09 05:28:04,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:28:04,732 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1145 transitions. [2024-11-09 05:28:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:28:04,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:04,734 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 05:28:04,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:28:04,735 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:04,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:04,736 INFO L85 PathProgramCache]: Analyzing trace with hash 821430744, now seen corresponding path program 1 times [2024-11-09 05:28:04,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:04,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972966874] [2024-11-09 05:28:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:04,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:05,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:05,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972966874] [2024-11-09 05:28:05,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972966874] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:05,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:05,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:28:05,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500123044] [2024-11-09 05:28:05,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:05,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:05,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:05,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:05,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:28:05,232 INFO L87 Difference]: Start difference. First operand 743 states and 1145 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:28:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:05,583 INFO L93 Difference]: Finished difference Result 2199 states and 3423 transitions. [2024-11-09 05:28:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2024-11-09 05:28:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:05,597 INFO L225 Difference]: With dead ends: 2199 [2024-11-09 05:28:05,597 INFO L226 Difference]: Without dead ends: 1469 [2024-11-09 05:28:05,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:28:05,603 INFO L432 NwaCegarLoop]: 645 mSDtfsCounter, 602 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:05,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1216 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2024-11-09 05:28:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1397. [2024-11-09 05:28:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 963 states have (on average 1.5150571131879542) internal successors, (1459), 1015 states have internal predecessors, (1459), 349 states have call successors, (349), 91 states have call predecessors, (349), 84 states have return successors, (369), 318 states have call predecessors, (369), 343 states have call successors, (369) [2024-11-09 05:28:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 2177 transitions. [2024-11-09 05:28:05,771 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 2177 transitions. Word has length 50 [2024-11-09 05:28:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:05,772 INFO L471 AbstractCegarLoop]: Abstraction has 1397 states and 2177 transitions. [2024-11-09 05:28:05,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:28:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 2177 transitions. [2024-11-09 05:28:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 05:28:05,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:05,779 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 05:28:05,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:28:05,780 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:05,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1314805307, now seen corresponding path program 1 times [2024-11-09 05:28:05,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:05,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063911839] [2024-11-09 05:28:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:05,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:06,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:06,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063911839] [2024-11-09 05:28:06,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063911839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:06,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:06,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:28:06,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551830309] [2024-11-09 05:28:06,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:06,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:28:06,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:28:06,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:06,347 INFO L87 Difference]: Start difference. First operand 1397 states and 2177 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 05:28:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:07,298 INFO L93 Difference]: Finished difference Result 3468 states and 5510 transitions. [2024-11-09 05:28:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:28:07,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2024-11-09 05:28:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:07,315 INFO L225 Difference]: With dead ends: 3468 [2024-11-09 05:28:07,316 INFO L226 Difference]: Without dead ends: 2083 [2024-11-09 05:28:07,325 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:28:07,326 INFO L432 NwaCegarLoop]: 646 mSDtfsCounter, 590 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 2949 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:07,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 2949 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:28:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2024-11-09 05:28:07,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 2047. [2024-11-09 05:28:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 1415 states have (on average 1.5081272084805655) internal successors, (2134), 1499 states have internal predecessors, (2134), 506 states have call successors, (506), 135 states have call predecessors, (506), 125 states have return successors, (575), 455 states have call predecessors, (575), 498 states have call successors, (575) [2024-11-09 05:28:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 3215 transitions. [2024-11-09 05:28:07,493 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 3215 transitions. Word has length 87 [2024-11-09 05:28:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:07,496 INFO L471 AbstractCegarLoop]: Abstraction has 2047 states and 3215 transitions. [2024-11-09 05:28:07,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 05:28:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 3215 transitions. [2024-11-09 05:28:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-09 05:28:07,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:07,504 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 05:28:07,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:28:07,504 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:07,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:07,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1016163829, now seen corresponding path program 1 times [2024-11-09 05:28:07,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:07,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168661750] [2024-11-09 05:28:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:07,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:28:07,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:07,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168661750] [2024-11-09 05:28:07,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168661750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:07,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227709922] [2024-11-09 05:28:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:07,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:07,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:07,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:07,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:28:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:08,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:28:08,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:28:08,489 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:08,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227709922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:08,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:08,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:28:08,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282203139] [2024-11-09 05:28:08,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:08,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:08,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:08,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:28:08,493 INFO L87 Difference]: Start difference. First operand 2047 states and 3215 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 05:28:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:08,956 INFO L93 Difference]: Finished difference Result 5869 states and 9481 transitions. [2024-11-09 05:28:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2024-11-09 05:28:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:08,996 INFO L225 Difference]: With dead ends: 5869 [2024-11-09 05:28:08,997 INFO L226 Difference]: Without dead ends: 3834 [2024-11-09 05:28:09,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:28:09,018 INFO L432 NwaCegarLoop]: 605 mSDtfsCounter, 562 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:09,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1112 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2024-11-09 05:28:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3716. [2024-11-09 05:28:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 2585 states have (on average 1.523017408123791) internal successors, (3937), 2755 states have internal predecessors, (3937), 897 states have call successors, (897), 240 states have call predecessors, (897), 233 states have return successors, (1066), 806 states have call predecessors, (1066), 889 states have call successors, (1066) [2024-11-09 05:28:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 5900 transitions. [2024-11-09 05:28:09,356 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 5900 transitions. Word has length 86 [2024-11-09 05:28:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:09,358 INFO L471 AbstractCegarLoop]: Abstraction has 3716 states and 5900 transitions. [2024-11-09 05:28:09,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 05:28:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 5900 transitions. [2024-11-09 05:28:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 05:28:09,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:09,364 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 05:28:09,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:28:09,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:09,566 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:09,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:09,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1477610622, now seen corresponding path program 1 times [2024-11-09 05:28:09,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:09,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629503823] [2024-11-09 05:28:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:09,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:28:09,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:09,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629503823] [2024-11-09 05:28:09,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629503823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:09,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51963662] [2024-11-09 05:28:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:09,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:09,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:09,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:28:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:10,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:28:10,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:28:10,496 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:10,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51963662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:10,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:10,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:28:10,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371477716] [2024-11-09 05:28:10,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:10,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:10,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:10,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:10,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:28:10,499 INFO L87 Difference]: Start difference. First operand 3716 states and 5900 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 05:28:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:10,966 INFO L93 Difference]: Finished difference Result 8356 states and 13420 transitions. [2024-11-09 05:28:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:10,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2024-11-09 05:28:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:11,010 INFO L225 Difference]: With dead ends: 8356 [2024-11-09 05:28:11,010 INFO L226 Difference]: Without dead ends: 4652 [2024-11-09 05:28:11,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:28:11,039 INFO L432 NwaCegarLoop]: 643 mSDtfsCounter, 561 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:11,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1148 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4652 states. [2024-11-09 05:28:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4652 to 4588. [2024-11-09 05:28:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 3203 states have (on average 1.5341866999687792) internal successors, (4914), 3416 states have internal predecessors, (4914), 1097 states have call successors, (1097), 291 states have call predecessors, (1097), 287 states have return successors, (1303), 989 states have call predecessors, (1303), 1089 states have call successors, (1303) [2024-11-09 05:28:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 7314 transitions. [2024-11-09 05:28:11,341 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 7314 transitions. Word has length 87 [2024-11-09 05:28:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:11,342 INFO L471 AbstractCegarLoop]: Abstraction has 4588 states and 7314 transitions. [2024-11-09 05:28:11,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 05:28:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 7314 transitions. [2024-11-09 05:28:11,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 05:28:11,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:11,350 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 05:28:11,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:11,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:11,552 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:11,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash 780319137, now seen corresponding path program 1 times [2024-11-09 05:28:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:11,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91095259] [2024-11-09 05:28:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:11,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:12,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:12,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91095259] [2024-11-09 05:28:12,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91095259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:12,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931491263] [2024-11-09 05:28:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:12,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:12,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:12,330 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:12,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:28:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:12,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:28:12,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:13,098 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:13,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931491263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:13,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:13,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2024-11-09 05:28:13,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138714074] [2024-11-09 05:28:13,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:13,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:28:13,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:28:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:28:13,103 INFO L87 Difference]: Start difference. First operand 4588 states and 7314 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-09 05:28:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:13,710 INFO L93 Difference]: Finished difference Result 9875 states and 15824 transitions. [2024-11-09 05:28:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:28:13,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2024-11-09 05:28:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:13,757 INFO L225 Difference]: With dead ends: 9875 [2024-11-09 05:28:13,758 INFO L226 Difference]: Without dead ends: 5299 [2024-11-09 05:28:13,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:28:13,789 INFO L432 NwaCegarLoop]: 688 mSDtfsCounter, 393 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:13,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1742 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2024-11-09 05:28:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 5190. [2024-11-09 05:28:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5190 states, 3613 states have (on average 1.5087185164683088) internal successors, (5451), 3824 states have internal predecessors, (5451), 1223 states have call successors, (1223), 354 states have call predecessors, (1223), 353 states have return successors, (1562), 1117 states have call predecessors, (1562), 1212 states have call successors, (1562) [2024-11-09 05:28:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5190 states to 5190 states and 8236 transitions. [2024-11-09 05:28:14,245 INFO L78 Accepts]: Start accepts. Automaton has 5190 states and 8236 transitions. Word has length 92 [2024-11-09 05:28:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:14,245 INFO L471 AbstractCegarLoop]: Abstraction has 5190 states and 8236 transitions. [2024-11-09 05:28:14,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-09 05:28:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5190 states and 8236 transitions. [2024-11-09 05:28:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-09 05:28:14,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:14,249 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 05:28:14,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:28:14,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:14,454 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:14,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1721698121, now seen corresponding path program 1 times [2024-11-09 05:28:14,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:14,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315371742] [2024-11-09 05:28:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:14,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:15,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:15,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315371742] [2024-11-09 05:28:15,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315371742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:15,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206067624] [2024-11-09 05:28:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:15,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:15,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:15,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:15,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:28:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:15,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:28:15,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:15,734 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:15,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206067624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:15,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:15,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-09 05:28:15,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141303396] [2024-11-09 05:28:15,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:15,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:28:15,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:15,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:28:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:28:15,737 INFO L87 Difference]: Start difference. First operand 5190 states and 8236 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-09 05:28:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:16,208 INFO L93 Difference]: Finished difference Result 9198 states and 14753 transitions. [2024-11-09 05:28:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:28:16,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2024-11-09 05:28:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:16,256 INFO L225 Difference]: With dead ends: 9198 [2024-11-09 05:28:16,257 INFO L226 Difference]: Without dead ends: 5235 [2024-11-09 05:28:16,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:28:16,285 INFO L432 NwaCegarLoop]: 594 mSDtfsCounter, 0 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:16,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2371 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5235 states. [2024-11-09 05:28:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5235 to 5235. [2024-11-09 05:28:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5235 states, 3658 states have (on average 1.502460360852925) internal successors, (5496), 3869 states have internal predecessors, (5496), 1223 states have call successors, (1223), 354 states have call predecessors, (1223), 353 states have return successors, (1562), 1117 states have call predecessors, (1562), 1212 states have call successors, (1562) [2024-11-09 05:28:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5235 states to 5235 states and 8281 transitions. [2024-11-09 05:28:16,730 INFO L78 Accepts]: Start accepts. Automaton has 5235 states and 8281 transitions. Word has length 93 [2024-11-09 05:28:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:16,731 INFO L471 AbstractCegarLoop]: Abstraction has 5235 states and 8281 transitions. [2024-11-09 05:28:16,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-09 05:28:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5235 states and 8281 transitions. [2024-11-09 05:28:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 05:28:16,735 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:16,735 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:16,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:28:16,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:28:16,939 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:16,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1611163949, now seen corresponding path program 1 times [2024-11-09 05:28:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:16,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905925779] [2024-11-09 05:28:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:16,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 05:28:17,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:17,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905925779] [2024-11-09 05:28:17,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905925779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:17,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695819509] [2024-11-09 05:28:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:17,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:17,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:17,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:17,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:28:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:18,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:28:18,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:18,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:28:19,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695819509] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:19,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:28:19,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 22 [2024-11-09 05:28:19,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910483241] [2024-11-09 05:28:19,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:19,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:28:19,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:19,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:28:19,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:28:19,107 INFO L87 Difference]: Start difference. First operand 5235 states and 8281 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-11-09 05:28:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:22,566 INFO L93 Difference]: Finished difference Result 10232 states and 16414 transitions. [2024-11-09 05:28:22,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:28:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 95 [2024-11-09 05:28:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:22,654 INFO L225 Difference]: With dead ends: 10232 [2024-11-09 05:28:22,655 INFO L226 Difference]: Without dead ends: 6248 [2024-11-09 05:28:22,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:28:22,683 INFO L432 NwaCegarLoop]: 631 mSDtfsCounter, 1052 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 2455 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:22,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 2455 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2087 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 05:28:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6248 states. [2024-11-09 05:28:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6248 to 5496. [2024-11-09 05:28:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 3828 states have (on average 1.4869383490073145) internal successors, (5692), 4039 states have internal predecessors, (5692), 1266 states have call successors, (1266), 360 states have call predecessors, (1266), 401 states have return successors, (1771), 1196 states have call predecessors, (1771), 1255 states have call successors, (1771) [2024-11-09 05:28:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 8729 transitions. [2024-11-09 05:28:23,229 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 8729 transitions. Word has length 95 [2024-11-09 05:28:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:23,230 INFO L471 AbstractCegarLoop]: Abstraction has 5496 states and 8729 transitions. [2024-11-09 05:28:23,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-11-09 05:28:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 8729 transitions. [2024-11-09 05:28:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-09 05:28:23,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:23,238 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:23,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:28:23,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 05:28:23,439 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:23,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash -367498775, now seen corresponding path program 1 times [2024-11-09 05:28:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:23,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535897637] [2024-11-09 05:28:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 05:28:24,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:24,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535897637] [2024-11-09 05:28:24,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535897637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:24,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109855841] [2024-11-09 05:28:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:24,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:24,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:24,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:24,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:28:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:24,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 05:28:24,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:24,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:28:25,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109855841] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:25,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:28:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2024-11-09 05:28:25,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776122803] [2024-11-09 05:28:25,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:25,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:28:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:25,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:28:25,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:28:25,281 INFO L87 Difference]: Start difference. First operand 5496 states and 8729 transitions. Second operand has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2024-11-09 05:28:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:29,945 INFO L93 Difference]: Finished difference Result 15654 states and 27540 transitions. [2024-11-09 05:28:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:28:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2024-11-09 05:28:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:30,031 INFO L225 Difference]: With dead ends: 15654 [2024-11-09 05:28:30,031 INFO L226 Difference]: Without dead ends: 11973 [2024-11-09 05:28:30,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 05:28:30,070 INFO L432 NwaCegarLoop]: 661 mSDtfsCounter, 2676 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 1271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2774 SdHoareTripleChecker+Valid, 3263 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1271 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:30,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2774 Valid, 3263 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1271 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 05:28:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11973 states. [2024-11-09 05:28:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11973 to 10667. [2024-11-09 05:28:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10667 states, 7536 states have (on average 1.4956210191082802) internal successors, (11271), 7887 states have internal predecessors, (11271), 2330 states have call successors, (2330), 684 states have call predecessors, (2330), 800 states have return successors, (4159), 2255 states have call predecessors, (4159), 2313 states have call successors, (4159) [2024-11-09 05:28:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10667 states to 10667 states and 17760 transitions. [2024-11-09 05:28:31,355 INFO L78 Accepts]: Start accepts. Automaton has 10667 states and 17760 transitions. Word has length 97 [2024-11-09 05:28:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:31,356 INFO L471 AbstractCegarLoop]: Abstraction has 10667 states and 17760 transitions. [2024-11-09 05:28:31,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2024-11-09 05:28:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10667 states and 17760 transitions. [2024-11-09 05:28:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-09 05:28:31,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:31,363 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:31,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:28:31,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:31,566 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:31,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:31,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1132807652, now seen corresponding path program 1 times [2024-11-09 05:28:31,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:31,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933702764] [2024-11-09 05:28:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:31,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 05:28:32,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:32,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933702764] [2024-11-09 05:28:32,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933702764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:32,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482929661] [2024-11-09 05:28:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:32,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:32,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:32,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:32,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:28:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:32,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:28:32,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:28:32,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:28:33,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482929661] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:33,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:28:33,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2024-11-09 05:28:33,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393880622] [2024-11-09 05:28:33,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:33,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:28:33,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:33,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:28:33,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:28:33,189 INFO L87 Difference]: Start difference. First operand 10667 states and 17760 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-09 05:28:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:35,450 INFO L93 Difference]: Finished difference Result 20980 states and 35717 transitions. [2024-11-09 05:28:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:28:35,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 101 [2024-11-09 05:28:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:35,551 INFO L225 Difference]: With dead ends: 20980 [2024-11-09 05:28:35,551 INFO L226 Difference]: Without dead ends: 12128 [2024-11-09 05:28:35,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:28:35,609 INFO L432 NwaCegarLoop]: 630 mSDtfsCounter, 957 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:35,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 2060 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:28:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12128 states. [2024-11-09 05:28:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12128 to 10655. [2024-11-09 05:28:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10655 states, 7536 states have (on average 1.4956210191082802) internal successors, (11271), 7875 states have internal predecessors, (11271), 2318 states have call successors, (2318), 684 states have call predecessors, (2318), 800 states have return successors, (4123), 2255 states have call predecessors, (4123), 2301 states have call successors, (4123) [2024-11-09 05:28:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10655 states to 10655 states and 17712 transitions. [2024-11-09 05:28:36,697 INFO L78 Accepts]: Start accepts. Automaton has 10655 states and 17712 transitions. Word has length 101 [2024-11-09 05:28:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:36,698 INFO L471 AbstractCegarLoop]: Abstraction has 10655 states and 17712 transitions. [2024-11-09 05:28:36,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-09 05:28:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 10655 states and 17712 transitions. [2024-11-09 05:28:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-09 05:28:36,705 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:36,705 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 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] [2024-11-09 05:28:36,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:28:36,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:28:36,910 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:36,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:36,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1046461429, now seen corresponding path program 1 times [2024-11-09 05:28:36,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:36,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708971715] [2024-11-09 05:28:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:36,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:28:37,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708971715] [2024-11-09 05:28:37,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708971715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:37,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824243899] [2024-11-09 05:28:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:37,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:37,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:28:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:38,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:28:38,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:28:38,191 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:38,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824243899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:38,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:38,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-09 05:28:38,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596529321] [2024-11-09 05:28:38,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:38,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:28:38,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:38,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:28:38,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:28:38,194 INFO L87 Difference]: Start difference. First operand 10655 states and 17712 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:28:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:39,005 INFO L93 Difference]: Finished difference Result 20419 states and 35223 transitions. [2024-11-09 05:28:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:28:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 127 [2024-11-09 05:28:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:39,098 INFO L225 Difference]: With dead ends: 20419 [2024-11-09 05:28:39,098 INFO L226 Difference]: Without dead ends: 11033 [2024-11-09 05:28:39,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:28:39,178 INFO L432 NwaCegarLoop]: 601 mSDtfsCounter, 0 mSDsluCounter, 2976 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:39,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3577 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11033 states. [2024-11-09 05:28:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11033 to 10985. [2024-11-09 05:28:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10985 states, 7758 states have (on average 1.4814385150812064) internal successors, (11493), 8121 states have internal predecessors, (11493), 2318 states have call successors, (2318), 684 states have call predecessors, (2318), 908 states have return successors, (4807), 2339 states have call predecessors, (4807), 2301 states have call successors, (4807) [2024-11-09 05:28:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10985 states to 10985 states and 18618 transitions. [2024-11-09 05:28:40,482 INFO L78 Accepts]: Start accepts. Automaton has 10985 states and 18618 transitions. Word has length 127 [2024-11-09 05:28:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:40,483 INFO L471 AbstractCegarLoop]: Abstraction has 10985 states and 18618 transitions. [2024-11-09 05:28:40,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:28:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 10985 states and 18618 transitions. [2024-11-09 05:28:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-09 05:28:40,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:40,492 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:28:40,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:28:40,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:28:40,693 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:40,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1292669905, now seen corresponding path program 1 times [2024-11-09 05:28:40,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:40,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019052347] [2024-11-09 05:28:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:28:41,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:41,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019052347] [2024-11-09 05:28:41,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019052347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:41,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930346080] [2024-11-09 05:28:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:41,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:41,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:41,434 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:41,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:28:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:41,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:28:41,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:28:41,986 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:41,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930346080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:41,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:41,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-09 05:28:41,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419175870] [2024-11-09 05:28:41,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:41,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:28:41,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:28:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:28:41,989 INFO L87 Difference]: Start difference. First operand 10985 states and 18618 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:28:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:42,781 INFO L93 Difference]: Finished difference Result 20959 states and 36583 transitions. [2024-11-09 05:28:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:28:42,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 131 [2024-11-09 05:28:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:42,929 INFO L225 Difference]: With dead ends: 20959 [2024-11-09 05:28:42,929 INFO L226 Difference]: Without dead ends: 11255 [2024-11-09 05:28:43,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:28:43,001 INFO L432 NwaCegarLoop]: 604 mSDtfsCounter, 0 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:43,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3591 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2024-11-09 05:28:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 11039. [2024-11-09 05:28:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11039 states, 7812 states have (on average 1.478110599078341) internal successors, (11547), 8121 states have internal predecessors, (11547), 2318 states have call successors, (2318), 684 states have call predecessors, (2318), 908 states have return successors, (4807), 2393 states have call predecessors, (4807), 2301 states have call successors, (4807) [2024-11-09 05:28:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11039 states to 11039 states and 18672 transitions. [2024-11-09 05:28:43,986 INFO L78 Accepts]: Start accepts. Automaton has 11039 states and 18672 transitions. Word has length 131 [2024-11-09 05:28:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:43,987 INFO L471 AbstractCegarLoop]: Abstraction has 11039 states and 18672 transitions. [2024-11-09 05:28:43,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:28:43,987 INFO L276 IsEmpty]: Start isEmpty. Operand 11039 states and 18672 transitions. [2024-11-09 05:28:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-09 05:28:43,993 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:43,993 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:28:44,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:28:44,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:44,195 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:44,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:44,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2060756687, now seen corresponding path program 1 times [2024-11-09 05:28:44,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:44,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041059656] [2024-11-09 05:28:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:44,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:28:44,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:44,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041059656] [2024-11-09 05:28:44,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041059656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:44,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394389204] [2024-11-09 05:28:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:44,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:44,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:44,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:44,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:28:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:45,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:28:45,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:28:45,399 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:45,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394389204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:45,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:45,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-09 05:28:45,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968467079] [2024-11-09 05:28:45,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:45,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:28:45,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:28:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:28:45,402 INFO L87 Difference]: Start difference. First operand 11039 states and 18672 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:28:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:46,163 INFO L93 Difference]: Finished difference Result 21067 states and 36691 transitions. [2024-11-09 05:28:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:28:46,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 131 [2024-11-09 05:28:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:46,249 INFO L225 Difference]: With dead ends: 21067 [2024-11-09 05:28:46,250 INFO L226 Difference]: Without dead ends: 11309 [2024-11-09 05:28:46,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:28:46,337 INFO L432 NwaCegarLoop]: 604 mSDtfsCounter, 0 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:46,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3591 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11309 states. [2024-11-09 05:28:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11309 to 11093. [2024-11-09 05:28:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11093 states, 7866 states have (on average 1.4748283752860412) internal successors, (11601), 8121 states have internal predecessors, (11601), 2318 states have call successors, (2318), 684 states have call predecessors, (2318), 908 states have return successors, (4807), 2447 states have call predecessors, (4807), 2301 states have call successors, (4807) [2024-11-09 05:28:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11093 states to 11093 states and 18726 transitions. [2024-11-09 05:28:47,245 INFO L78 Accepts]: Start accepts. Automaton has 11093 states and 18726 transitions. Word has length 131 [2024-11-09 05:28:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:47,247 INFO L471 AbstractCegarLoop]: Abstraction has 11093 states and 18726 transitions. [2024-11-09 05:28:47,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:28:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 11093 states and 18726 transitions. [2024-11-09 05:28:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-09 05:28:47,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:47,256 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:28:47,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:47,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:47,457 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:47,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash 481115145, now seen corresponding path program 1 times [2024-11-09 05:28:47,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:47,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991223276] [2024-11-09 05:28:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:47,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-09 05:28:48,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:48,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991223276] [2024-11-09 05:28:48,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991223276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:48,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549916889] [2024-11-09 05:28:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:48,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:48,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:48,462 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:48,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:28:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:49,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:28:49,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:28:49,117 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:49,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549916889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:49,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:49,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-09 05:28:49,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423423156] [2024-11-09 05:28:49,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:49,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:28:49,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:49,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:28:49,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:28:49,120 INFO L87 Difference]: Start difference. First operand 11093 states and 18726 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-09 05:28:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:50,133 INFO L93 Difference]: Finished difference Result 23154 states and 40739 transitions. [2024-11-09 05:28:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:28:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 152 [2024-11-09 05:28:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:50,229 INFO L225 Difference]: With dead ends: 23154 [2024-11-09 05:28:50,230 INFO L226 Difference]: Without dead ends: 10933 [2024-11-09 05:28:50,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:28:50,315 INFO L432 NwaCegarLoop]: 643 mSDtfsCounter, 241 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2941 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:50,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 2941 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10933 states. [2024-11-09 05:28:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10933 to 10844. [2024-11-09 05:28:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10844 states, 7661 states have (on average 1.4487664795718576) internal successors, (11099), 7940 states have internal predecessors, (11099), 2274 states have call successors, (2274), 678 states have call predecessors, (2274), 908 states have return successors, (4694), 2385 states have call predecessors, (4694), 2257 states have call successors, (4694) [2024-11-09 05:28:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10844 states to 10844 states and 18067 transitions. [2024-11-09 05:28:51,303 INFO L78 Accepts]: Start accepts. Automaton has 10844 states and 18067 transitions. Word has length 152 [2024-11-09 05:28:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:51,304 INFO L471 AbstractCegarLoop]: Abstraction has 10844 states and 18067 transitions. [2024-11-09 05:28:51,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-09 05:28:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 10844 states and 18067 transitions. [2024-11-09 05:28:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-09 05:28:51,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:51,314 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:28:51,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:28:51,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:51,515 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:51,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:51,515 INFO L85 PathProgramCache]: Analyzing trace with hash -5434583, now seen corresponding path program 1 times [2024-11-09 05:28:51,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:51,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619301222] [2024-11-09 05:28:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:51,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 05:28:52,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:52,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619301222] [2024-11-09 05:28:52,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619301222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:52,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489949864] [2024-11-09 05:28:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:52,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:52,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:52,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:52,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:28:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:52,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:28:52,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:28:52,926 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:52,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489949864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:52,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:52,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-09 05:28:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997313073] [2024-11-09 05:28:52,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:52,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:28:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:52,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:28:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:28:52,928 INFO L87 Difference]: Start difference. First operand 10844 states and 18067 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-09 05:28:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:53,894 INFO L93 Difference]: Finished difference Result 23888 states and 41558 transitions. [2024-11-09 05:28:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:28:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 160 [2024-11-09 05:28:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:53,998 INFO L225 Difference]: With dead ends: 23888 [2024-11-09 05:28:53,998 INFO L226 Difference]: Without dead ends: 13931 [2024-11-09 05:28:54,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:28:54,077 INFO L432 NwaCegarLoop]: 615 mSDtfsCounter, 281 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 2848 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:54,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 2848 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13931 states. [2024-11-09 05:28:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13931 to 13521. [2024-11-09 05:28:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13521 states, 9909 states have (on average 1.4754263800585325) internal successors, (14620), 10295 states have internal predecessors, (14620), 2554 states have call successors, (2554), 720 states have call predecessors, (2554), 1057 states have return successors, (4986), 2665 states have call predecessors, (4986), 2537 states have call successors, (4986) [2024-11-09 05:28:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13521 states to 13521 states and 22160 transitions. [2024-11-09 05:28:54,888 INFO L78 Accepts]: Start accepts. Automaton has 13521 states and 22160 transitions. Word has length 160 [2024-11-09 05:28:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:54,889 INFO L471 AbstractCegarLoop]: Abstraction has 13521 states and 22160 transitions. [2024-11-09 05:28:54,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-09 05:28:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 13521 states and 22160 transitions. [2024-11-09 05:28:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-09 05:28:54,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:54,899 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2024-11-09 05:28:54,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 05:28:55,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:55,100 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:55,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:55,100 INFO L85 PathProgramCache]: Analyzing trace with hash -164896105, now seen corresponding path program 1 times [2024-11-09 05:28:55,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:55,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892255908] [2024-11-09 05:28:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:55,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 05:28:55,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:55,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892255908] [2024-11-09 05:28:55,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892255908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:55,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925633126] [2024-11-09 05:28:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:55,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:55,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:55,828 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:55,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:28:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:56,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 1909 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:28:56,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 05:28:57,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:28:58,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925633126] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:58,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:28:58,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 19 [2024-11-09 05:28:58,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644987899] [2024-11-09 05:28:58,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:58,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:28:58,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:58,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:28:58,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:28:58,011 INFO L87 Difference]: Start difference. First operand 13521 states and 22160 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 4 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-11-09 05:29:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:03,439 INFO L93 Difference]: Finished difference Result 32459 states and 55574 transitions. [2024-11-09 05:29:03,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:29:03,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 4 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 143 [2024-11-09 05:29:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:03,628 INFO L225 Difference]: With dead ends: 32459 [2024-11-09 05:29:03,628 INFO L226 Difference]: Without dead ends: 17954 [2024-11-09 05:29:03,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:29:03,741 INFO L432 NwaCegarLoop]: 882 mSDtfsCounter, 1383 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:03,742 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 1534 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-09 05:29:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17954 states. [2024-11-09 05:29:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17954 to 15702. [2024-11-09 05:29:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15702 states, 11156 states have (on average 1.4733775546790964) internal successors, (16437), 11740 states have internal predecessors, (16437), 3429 states have call successors, (3429), 739 states have call predecessors, (3429), 1116 states have return successors, (6111), 3510 states have call predecessors, (6111), 3412 states have call successors, (6111) [2024-11-09 05:29:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 25977 transitions. [2024-11-09 05:29:05,386 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 25977 transitions. Word has length 143 [2024-11-09 05:29:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:05,386 INFO L471 AbstractCegarLoop]: Abstraction has 15702 states and 25977 transitions. [2024-11-09 05:29:05,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 4 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-11-09 05:29:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 25977 transitions. [2024-11-09 05:29:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-09 05:29:05,398 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:05,398 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:29:05,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 05:29:05,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 05:29:05,599 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:29:05,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:05,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1224361772, now seen corresponding path program 1 times [2024-11-09 05:29:05,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:05,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570493994] [2024-11-09 05:29:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:05,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:29:06,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570493994] [2024-11-09 05:29:06,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570493994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153570577] [2024-11-09 05:29:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:06,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:06,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:06,293 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:06,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:29:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:06,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 1912 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:29:06,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:29:07,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 05:29:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153570577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912814806] [2024-11-09 05:29:07,677 INFO L159 IcfgInterpreter]: Started Sifa with 128 locations of interest [2024-11-09 05:29:07,677 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:07,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:07,687 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:07,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:22,666 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 576 for LOIs [2024-11-09 05:29:39,402 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 448 for LOIs [2024-11-09 05:29:40,422 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 601 for LOIs [2024-11-09 05:29:47,329 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 575 for LOIs [2024-11-09 05:29:47,834 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 439 for LOIs [2024-11-09 05:29:48,053 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 439 for LOIs [2024-11-09 05:29:48,308 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 575 for LOIs [2024-11-09 05:29:57,572 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 579 for LOIs [2024-11-09 05:29:58,286 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 507 for LOIs [2024-11-09 05:29:58,685 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:14,652 WARN L286 SmtUtils]: Spent 6.38s on a formula simplification that was a NOOP. DAG size: 601 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:30:21,255 WARN L286 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 601 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:30:27,277 WARN L286 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 575 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:30:47,360 WARN L286 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 577 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:30:53,488 WARN L286 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 577 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:30:59,841 WARN L286 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 579 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:31:06,196 WARN L286 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 579 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:31:20,281 WARN L286 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 576 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:31:29,724 WARN L286 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 578 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:31:35,418 WARN L286 SmtUtils]: Spent 5.35s on a formula simplification that was a NOOP. DAG size: 578 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:31:44,882 WARN L286 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 580 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:31:50,616 WARN L286 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 580 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:02,919 WARN L286 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 478 DAG size of output: 447 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:08,670 WARN L286 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 580 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:14,426 WARN L286 SmtUtils]: Spent 5.36s on a formula simplification that was a NOOP. DAG size: 580 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:20,228 WARN L286 SmtUtils]: Spent 5.40s on a formula simplification that was a NOOP. DAG size: 580 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:26,034 WARN L286 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 580 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:26,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1912814806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:32:26,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:32:26,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 12, 12] total 55 [2024-11-09 05:32:26,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005097668] [2024-11-09 05:32:26,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:32:26,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 05:32:26,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:32:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 05:32:26,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=2545, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 05:32:26,046 INFO L87 Difference]: Start difference. First operand 15702 states and 25977 transitions. Second operand has 29 states, 21 states have (on average 4.285714285714286) internal successors, (90), 18 states have internal predecessors, (90), 9 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-09 05:32:32,740 WARN L286 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 577 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:38,895 WARN L286 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 579 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:45,180 WARN L286 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 578 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:50,976 WARN L286 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 578 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:32:57,259 WARN L286 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 582 DAG size of output: 580 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:33:03,018 WARN L286 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 584 DAG size of output: 582 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:33:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:25,630 INFO L93 Difference]: Finished difference Result 31525 states and 52147 transitions. [2024-11-09 05:33:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 05:33:25,631 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 4.285714285714286) internal successors, (90), 18 states have internal predecessors, (90), 9 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) Word has length 145 [2024-11-09 05:33:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:25,741 INFO L225 Difference]: With dead ends: 31525 [2024-11-09 05:33:25,741 INFO L226 Difference]: Without dead ends: 15835 [2024-11-09 05:33:25,834 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 182.5s TimeCoverageRelationStatistics Valid=521, Invalid=3139, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 05:33:25,835 INFO L432 NwaCegarLoop]: 576 mSDtfsCounter, 247 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 5191 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 3102 SdHoareTripleChecker+Invalid, 5255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 5191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:25,835 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 3102 Invalid, 5255 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [64 Valid, 5191 Invalid, 0 Unknown, 0 Unchecked, 23.2s Time] [2024-11-09 05:33:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15835 states. [2024-11-09 05:33:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15835 to 15756. [2024-11-09 05:33:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15756 states, 11197 states have (on average 1.472001428954184) internal successors, (16482), 11780 states have internal predecessors, (16482), 3437 states have call successors, (3437), 746 states have call predecessors, (3437), 1121 states have return successors, (6121), 3517 states have call predecessors, (6121), 3420 states have call successors, (6121) [2024-11-09 05:33:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15756 states to 15756 states and 26040 transitions. [2024-11-09 05:33:27,581 INFO L78 Accepts]: Start accepts. Automaton has 15756 states and 26040 transitions. Word has length 145 [2024-11-09 05:33:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:27,582 INFO L471 AbstractCegarLoop]: Abstraction has 15756 states and 26040 transitions. [2024-11-09 05:33:27,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 4.285714285714286) internal successors, (90), 18 states have internal predecessors, (90), 9 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-09 05:33:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 15756 states and 26040 transitions. [2024-11-09 05:33:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-09 05:33:27,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:27,590 INFO L215 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:27,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 05:33:27,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 05:33:27,791 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:27,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1976428056, now seen corresponding path program 1 times [2024-11-09 05:33:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:27,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693950881] [2024-11-09 05:33:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:27,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 05:33:29,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:29,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693950881] [2024-11-09 05:33:29,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693950881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:29,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312114685] [2024-11-09 05:33:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:29,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:29,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:29,019 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:29,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:33:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:29,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:33:29,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:33:29,771 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:29,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312114685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:29,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:29,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2024-11-09 05:33:29,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291996639] [2024-11-09 05:33:29,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:29,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:33:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:33:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:33:29,773 INFO L87 Difference]: Start difference. First operand 15756 states and 26040 transitions. Second operand has 12 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 5 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-09 05:33:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:38,876 INFO L93 Difference]: Finished difference Result 51728 states and 91517 transitions. [2024-11-09 05:33:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 05:33:38,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 5 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 154 [2024-11-09 05:33:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:39,085 INFO L225 Difference]: With dead ends: 51728 [2024-11-09 05:33:39,085 INFO L226 Difference]: Without dead ends: 38553 [2024-11-09 05:33:39,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 05:33:39,193 INFO L432 NwaCegarLoop]: 482 mSDtfsCounter, 2655 mSDsluCounter, 3074 mSDsCounter, 0 mSdLazyCounter, 6675 mSolverCounterSat, 1271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2761 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 7946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1271 IncrementalHoareTripleChecker+Valid, 6675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:39,194 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2761 Valid, 3556 Invalid, 7946 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1271 Valid, 6675 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-09 05:33:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38553 states. [2024-11-09 05:33:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38553 to 36560. [2024-11-09 05:33:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36560 states, 27200 states have (on average 1.4109558823529411) internal successors, (38378), 28183 states have internal predecessors, (38378), 6524 states have call successors, (6524), 1737 states have call predecessors, (6524), 2835 states have return successors, (15423), 7035 states have call predecessors, (15423), 6501 states have call successors, (15423) [2024-11-09 05:33:42,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36560 states to 36560 states and 60325 transitions. [2024-11-09 05:33:42,955 INFO L78 Accepts]: Start accepts. Automaton has 36560 states and 60325 transitions. Word has length 154 [2024-11-09 05:33:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:42,956 INFO L471 AbstractCegarLoop]: Abstraction has 36560 states and 60325 transitions. [2024-11-09 05:33:42,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 5 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-09 05:33:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 36560 states and 60325 transitions. [2024-11-09 05:33:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-09 05:33:42,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:42,973 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:33:42,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 05:33:43,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 05:33:43,174 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:43,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:43,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1035946124, now seen corresponding path program 1 times [2024-11-09 05:33:43,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:43,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520706860] [2024-11-09 05:33:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:43,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-09 05:33:44,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520706860] [2024-11-09 05:33:44,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520706860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249460952] [2024-11-09 05:33:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:44,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:44,652 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:44,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 05:33:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:45,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 2395 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:33:45,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 05:33:45,352 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:45,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249460952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:45,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:45,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2024-11-09 05:33:45,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010815147] [2024-11-09 05:33:45,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:45,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:45,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:33:45,354 INFO L87 Difference]: Start difference. First operand 36560 states and 60325 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2024-11-09 05:33:48,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:48,778 INFO L93 Difference]: Finished difference Result 70815 states and 118421 transitions. [2024-11-09 05:33:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:48,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 166 [2024-11-09 05:33:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:48,999 INFO L225 Difference]: With dead ends: 70815 [2024-11-09 05:33:48,999 INFO L226 Difference]: Without dead ends: 36830 [2024-11-09 05:33:49,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:33:49,330 INFO L432 NwaCegarLoop]: 595 mSDtfsCounter, 17 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:49,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1156 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36830 states. [2024-11-09 05:33:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36830 to 36812. [2024-11-09 05:33:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36812 states, 27416 states have (on average 1.4090312226437116) internal successors, (38630), 28399 states have internal predecessors, (38630), 6560 states have call successors, (6560), 1737 states have call predecessors, (6560), 2835 states have return successors, (15459), 7071 states have call predecessors, (15459), 6537 states have call successors, (15459) [2024-11-09 05:33:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36812 states to 36812 states and 60649 transitions. [2024-11-09 05:33:53,099 INFO L78 Accepts]: Start accepts. Automaton has 36812 states and 60649 transitions. Word has length 166 [2024-11-09 05:33:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:53,100 INFO L471 AbstractCegarLoop]: Abstraction has 36812 states and 60649 transitions. [2024-11-09 05:33:53,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2024-11-09 05:33:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 36812 states and 60649 transitions. [2024-11-09 05:33:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-09 05:33:53,115 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:53,115 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:33:53,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 05:33:53,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:53,316 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:53,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1289900121, now seen corresponding path program 1 times [2024-11-09 05:33:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:53,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905699013] [2024-11-09 05:33:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-09 05:33:54,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:54,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905699013] [2024-11-09 05:33:54,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905699013] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:54,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936361854] [2024-11-09 05:33:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:54,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:54,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:54,367 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:54,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e4c2f2-b37c-4996-957f-f480af2f0825/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 05:33:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:54,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 2396 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:33:54,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:33:55,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:55,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936361854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:55,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:55,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2024-11-09 05:33:55,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043929866] [2024-11-09 05:33:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:55,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:55,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:33:55,039 INFO L87 Difference]: Start difference. First operand 36812 states and 60649 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2024-11-09 05:34:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:00,088 INFO L93 Difference]: Finished difference Result 85012 states and 143397 transitions. [2024-11-09 05:34:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:34:00,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 167 [2024-11-09 05:34:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:00,666 INFO L225 Difference]: With dead ends: 85012 [2024-11-09 05:34:00,666 INFO L226 Difference]: Without dead ends: 48278 [2024-11-09 05:34:00,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:34:00,832 INFO L432 NwaCegarLoop]: 831 mSDtfsCounter, 486 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:00,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1404 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:34:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48278 states.