./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product25.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_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/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_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/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_3ae4f539-469e-48d8-806f-1df4174045aa/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 7dffe766d259411d55a5393012f150d80e63eb09c0b69cb40e513f715e96f78e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:17:21,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:17:21,937 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:17:21,942 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:17:21,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:17:21,986 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:17:21,988 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:17:21,989 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:17:21,990 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:17:21,991 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:17:21,991 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:17:21,991 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:17:21,992 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:17:21,992 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:17:21,994 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:17:21,995 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:17:21,996 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:17:21,996 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:17:21,996 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:17:21,997 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:17:21,997 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:17:22,001 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:17:22,002 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:17:22,002 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:17:22,003 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:17:22,003 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:17:22,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:17:22,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:17:22,004 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:17:22,004 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:17:22,004 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:17:22,007 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:17:22,007 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:17:22,007 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:17:22,008 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:17:22,008 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:17:22,008 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:17:22,009 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:17:22,009 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:17:22,009 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:17:22,009 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:17:22,010 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:17:22,010 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:17:22,010 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:17:22,011 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:17:22,011 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:17:22,011 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:17:22,011 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_3ae4f539-469e-48d8-806f-1df4174045aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dffe766d259411d55a5393012f150d80e63eb09c0b69cb40e513f715e96f78e [2024-11-09 01:17:22,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:17:22,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:17:22,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:17:22,348 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:17:22,349 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:17:22,350 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c Unable to find full path for "g++" [2024-11-09 01:17:24,342 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:17:24,651 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:17:24,652 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c [2024-11-09 01:17:24,680 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/data/268f1d828/d109a90172844a329dfbad366e5ae19c/FLAGa4f4c2b00 [2024-11-09 01:17:24,908 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/data/268f1d828/d109a90172844a329dfbad366e5ae19c [2024-11-09 01:17:24,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:17:24,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:17:24,914 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:17:24,914 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:17:24,919 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:17:24,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:17:24" (1/1) ... [2024-11-09 01:17:24,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743e178d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:24, skipping insertion in model container [2024-11-09 01:17:24,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:17:24" (1/1) ... [2024-11-09 01:17:25,009 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:17:25,395 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_3ae4f539-469e-48d8-806f-1df4174045aa/sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c[27637,27650] [2024-11-09 01:17:25,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:17:25,628 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:17:25,639 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2024-11-09 01:17:25,641 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [414] [2024-11-09 01:17:25,642 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1082] [2024-11-09 01:17:25,642 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1120] [2024-11-09 01:17:25,642 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1129] [2024-11-09 01:17:25,642 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1485] [2024-11-09 01:17:25,643 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1579] [2024-11-09 01:17:25,643 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1594] [2024-11-09 01:17:25,644 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [3062] [2024-11-09 01:17:25,644 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3248] [2024-11-09 01:17:25,708 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_3ae4f539-469e-48d8-806f-1df4174045aa/sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c[27637,27650] [2024-11-09 01:17:25,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:17:25,826 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:17:25,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25 WrapperNode [2024-11-09 01:17:25,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:17:25,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:17:25,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:17:25,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:17:25,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:25,869 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:25,926 INFO L138 Inliner]: procedures = 89, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 840 [2024-11-09 01:17:25,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:17:25,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:17:25,927 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:17:25,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:17:25,937 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:25,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:25,942 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:25,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:25,967 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:25,994 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:26,001 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:26,009 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:26,027 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:17:26,028 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:17:26,041 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:17:26,041 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:17:26,042 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (1/1) ... [2024-11-09 01:17:26,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:17:26,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:26,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:17:26,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:17:26,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:17:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-09 01:17:26,166 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-09 01:17:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-09 01:17:26,166 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-09 01:17:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-09 01:17:26,167 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-09 01:17:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-09 01:17:26,167 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-09 01:17:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-09 01:17:26,167 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-09 01:17:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-09 01:17:26,167 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-09 01:17:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-09 01:17:26,168 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-09 01:17:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-09 01:17:26,168 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-09 01:17:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-09 01:17:26,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-09 01:17:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-09 01:17:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-09 01:17:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-09 01:17:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-09 01:17:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-09 01:17:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-09 01:17:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-09 01:17:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-09 01:17:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-09 01:17:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-09 01:17:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-09 01:17:26,175 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-09 01:17:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-09 01:17:26,176 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-09 01:17:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-09 01:17:26,176 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-09 01:17:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-09 01:17:26,176 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-09 01:17:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-09 01:17:26,177 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-09 01:17:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:17:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-09 01:17:26,177 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-09 01:17:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-09 01:17:26,178 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-09 01:17:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-09 01:17:26,178 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-09 01:17:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-09 01:17:26,179 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-09 01:17:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:17:26,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:17:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-09 01:17:26,181 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-09 01:17:26,384 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:17:26,389 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:17:27,861 INFO L? ?]: Removed 447 outVars from TransFormulas that were not future-live. [2024-11-09 01:17:27,862 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:17:28,928 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:17:28,932 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 01:17:28,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:17:28 BoogieIcfgContainer [2024-11-09 01:17:28,932 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:17:28,934 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:17:28,938 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:17:28,941 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:17:28,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:17:24" (1/3) ... [2024-11-09 01:17:28,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad17f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:17:28, skipping insertion in model container [2024-11-09 01:17:28,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:25" (2/3) ... [2024-11-09 01:17:28,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad17f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:17:28, skipping insertion in model container [2024-11-09 01:17:28,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:17:28" (3/3) ... [2024-11-09 01:17:28,944 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product25.cil.c [2024-11-09 01:17:28,964 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:17:28,964 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:17:29,069 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:17:29,076 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;@7f70eadd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:17:29,078 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:17:29,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2024-11-09 01:17:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 01:17:29,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:29,107 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] [2024-11-09 01:17:29,107 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:29,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash 667937537, now seen corresponding path program 1 times [2024-11-09 01:17:29,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:29,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636202686] [2024-11-09 01:17:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:30,054 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 01:17:30,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:30,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636202686] [2024-11-09 01:17:30,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636202686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516915821] [2024-11-09 01:17:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:30,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:30,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:30,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:17:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:30,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:17:30,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:30,683 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 01:17:30,683 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:30,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516915821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:30,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:30,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:17:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684048477] [2024-11-09 01:17:30,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:30,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:17:30,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:17:30,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:17:30,730 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:17:31,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:31,105 INFO L93 Difference]: Finished difference Result 1074 states and 1734 transitions. [2024-11-09 01:17:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:17:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2024-11-09 01:17:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:31,136 INFO L225 Difference]: With dead ends: 1074 [2024-11-09 01:17:31,137 INFO L226 Difference]: Without dead ends: 693 [2024-11-09 01:17:31,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 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 01:17:31,156 INFO L432 NwaCegarLoop]: 984 mSDtfsCounter, 492 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:31,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1535 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:17:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2024-11-09 01:17:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 681. [2024-11-09 01:17:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 462 states have (on average 1.5844155844155845) internal successors, (732), 493 states have internal predecessors, (732), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (178), 170 states have call predecessors, (178), 173 states have call successors, (178) [2024-11-09 01:17:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1086 transitions. [2024-11-09 01:17:31,356 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1086 transitions. Word has length 64 [2024-11-09 01:17:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:31,358 INFO L471 AbstractCegarLoop]: Abstraction has 681 states and 1086 transitions. [2024-11-09 01:17:31,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:17:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1086 transitions. [2024-11-09 01:17:31,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 01:17:31,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:31,372 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] [2024-11-09 01:17:31,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:17:31,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-09 01:17:31,574 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:31,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash -571294850, now seen corresponding path program 1 times [2024-11-09 01:17:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:31,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133715569] [2024-11-09 01:17:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:31,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:32,000 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 01:17:32,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:32,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133715569] [2024-11-09 01:17:32,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133715569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:32,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16767820] [2024-11-09 01:17:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:32,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:32,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:32,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:32,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:17:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:32,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:17:32,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:32,548 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 01:17:32,548 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:32,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16767820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:32,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:32,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:17:32,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348900865] [2024-11-09 01:17:32,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:32,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:17:32,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:17:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:17:32,552 INFO L87 Difference]: Start difference. First operand 681 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 01:17:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:32,813 INFO L93 Difference]: Finished difference Result 1666 states and 2688 transitions. [2024-11-09 01:17:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:17:32,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2024-11-09 01:17:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:32,824 INFO L225 Difference]: With dead ends: 1666 [2024-11-09 01:17:32,824 INFO L226 Difference]: Without dead ends: 997 [2024-11-09 01:17:32,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 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 01:17:32,830 INFO L432 NwaCegarLoop]: 560 mSDtfsCounter, 549 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:32,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1033 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:17:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2024-11-09 01:17:32,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 973. [2024-11-09 01:17:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 664 states have (on average 1.5933734939759037) internal successors, (1058), 710 states have internal predecessors, (1058), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2024-11-09 01:17:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1563 transitions. [2024-11-09 01:17:32,899 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1563 transitions. Word has length 63 [2024-11-09 01:17:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:32,900 INFO L471 AbstractCegarLoop]: Abstraction has 973 states and 1563 transitions. [2024-11-09 01:17:32,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 01:17:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1563 transitions. [2024-11-09 01:17:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 01:17:32,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:32,905 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] [2024-11-09 01:17:32,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:17:33,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-09 01:17:33,106 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:33,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2126143637, now seen corresponding path program 1 times [2024-11-09 01:17:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:33,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732282359] [2024-11-09 01:17:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:33,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:33,462 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 01:17:33,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:33,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732282359] [2024-11-09 01:17:33,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732282359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:33,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:17:33,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:17:33,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584474178] [2024-11-09 01:17:33,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:33,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:17:33,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:33,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:17:33,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:17:33,468 INFO L87 Difference]: Start difference. First operand 973 states and 1563 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-09 01:17:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:33,679 INFO L93 Difference]: Finished difference Result 1940 states and 3134 transitions. [2024-11-09 01:17:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:17:33,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 64 [2024-11-09 01:17:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:33,689 INFO L225 Difference]: With dead ends: 1940 [2024-11-09 01:17:33,690 INFO L226 Difference]: Without dead ends: 979 [2024-11-09 01:17:33,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:17:33,698 INFO L432 NwaCegarLoop]: 559 mSDtfsCounter, 0 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:33,699 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1675 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:17:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2024-11-09 01:17:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 979. [2024-11-09 01:17:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 670 states have (on average 1.5880597014925373) internal successors, (1064), 716 states have internal predecessors, (1064), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2024-11-09 01:17:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1569 transitions. [2024-11-09 01:17:33,767 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1569 transitions. Word has length 64 [2024-11-09 01:17:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:33,769 INFO L471 AbstractCegarLoop]: Abstraction has 979 states and 1569 transitions. [2024-11-09 01:17:33,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-09 01:17:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1569 transitions. [2024-11-09 01:17:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 01:17:33,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:33,775 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] [2024-11-09 01:17:33,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 01:17:33,775 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:33,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2143511896, now seen corresponding path program 1 times [2024-11-09 01:17:33,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:33,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969914823] [2024-11-09 01:17:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:33,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:17:34,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:34,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969914823] [2024-11-09 01:17:34,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969914823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:34,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770745504] [2024-11-09 01:17:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:34,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:34,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:34,248 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:17:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:34,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 01:17:34,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:34,846 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 01:17:34,849 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:34,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770745504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:34,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:34,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:17:34,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457063545] [2024-11-09 01:17:34,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:34,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:17:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:17:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:17:34,852 INFO L87 Difference]: Start difference. First operand 979 states and 1569 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:17:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:35,248 INFO L93 Difference]: Finished difference Result 2796 states and 4528 transitions. [2024-11-09 01:17:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:17:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2024-11-09 01:17:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:35,262 INFO L225 Difference]: With dead ends: 2796 [2024-11-09 01:17:35,262 INFO L226 Difference]: Without dead ends: 1829 [2024-11-09 01:17:35,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 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 01:17:35,271 INFO L432 NwaCegarLoop]: 608 mSDtfsCounter, 478 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:35,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1093 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:17:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2024-11-09 01:17:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1807. [2024-11-09 01:17:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1228 states have (on average 1.5390879478827362) internal successors, (1890), 1318 states have internal predecessors, (1890), 468 states have call successors, (468), 112 states have call predecessors, (468), 110 states have return successors, (503), 451 states have call predecessors, (503), 464 states have call successors, (503) [2024-11-09 01:17:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2861 transitions. [2024-11-09 01:17:35,410 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2861 transitions. Word has length 68 [2024-11-09 01:17:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:35,411 INFO L471 AbstractCegarLoop]: Abstraction has 1807 states and 2861 transitions. [2024-11-09 01:17:35,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:17:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2861 transitions. [2024-11-09 01:17:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 01:17:35,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:35,415 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] [2024-11-09 01:17:35,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:17:35,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-09 01:17:35,620 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:35,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1397331985, now seen corresponding path program 1 times [2024-11-09 01:17:35,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:35,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64902976] [2024-11-09 01:17:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:35,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:17:36,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:36,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64902976] [2024-11-09 01:17:36,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64902976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:36,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913335878] [2024-11-09 01:17:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:36,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:36,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:36,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:36,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:17:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:36,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 01:17:36,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:36,684 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 01:17:36,686 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:36,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913335878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:36,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:36,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:17:36,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739990667] [2024-11-09 01:17:36,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:36,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:17:36,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:17:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:17:36,689 INFO L87 Difference]: Start difference. First operand 1807 states and 2861 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 01:17:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:37,567 INFO L93 Difference]: Finished difference Result 3198 states and 5029 transitions. [2024-11-09 01:17:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:17:37,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2024-11-09 01:17:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:37,583 INFO L225 Difference]: With dead ends: 3198 [2024-11-09 01:17:37,583 INFO L226 Difference]: Without dead ends: 2042 [2024-11-09 01:17:37,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:17:37,592 INFO L432 NwaCegarLoop]: 642 mSDtfsCounter, 465 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:37,592 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 2115 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 01:17:37,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2024-11-09 01:17:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 2023. [2024-11-09 01:17:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1402 states have (on average 1.5213980028530671) internal successors, (2133), 1495 states have internal predecessors, (2133), 495 states have call successors, (495), 124 states have call predecessors, (495), 125 states have return successors, (533), 478 states have call predecessors, (533), 491 states have call successors, (533) [2024-11-09 01:17:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 3161 transitions. [2024-11-09 01:17:37,719 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 3161 transitions. Word has length 72 [2024-11-09 01:17:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:37,721 INFO L471 AbstractCegarLoop]: Abstraction has 2023 states and 3161 transitions. [2024-11-09 01:17:37,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 01:17:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 3161 transitions. [2024-11-09 01:17:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 01:17:37,725 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:37,725 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] [2024-11-09 01:17:37,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 01:17:37,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:37,931 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:37,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1059223010, now seen corresponding path program 1 times [2024-11-09 01:17:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:37,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99283593] [2024-11-09 01:17:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:17:38,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:38,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99283593] [2024-11-09 01:17:38,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99283593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:38,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271094539] [2024-11-09 01:17:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:38,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:38,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:38,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:38,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:17:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:38,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:17:38,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:38,774 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 01:17:38,774 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:38,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271094539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:38,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:38,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-09 01:17:38,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789208628] [2024-11-09 01:17:38,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:38,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:17:38,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:17:38,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 01:17:38,777 INFO L87 Difference]: Start difference. First operand 2023 states and 3161 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:17:39,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:39,178 INFO L93 Difference]: Finished difference Result 3830 states and 6052 transitions. [2024-11-09 01:17:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:17:39,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2024-11-09 01:17:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:39,198 INFO L225 Difference]: With dead ends: 3830 [2024-11-09 01:17:39,198 INFO L226 Difference]: Without dead ends: 2047 [2024-11-09 01:17:39,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:17:39,213 INFO L432 NwaCegarLoop]: 591 mSDtfsCounter, 262 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:39,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1556 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:17:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2024-11-09 01:17:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 2023. [2024-11-09 01:17:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1402 states have (on average 1.4828815977175465) internal successors, (2079), 1495 states have internal predecessors, (2079), 495 states have call successors, (495), 124 states have call predecessors, (495), 125 states have return successors, (533), 478 states have call predecessors, (533), 491 states have call successors, (533) [2024-11-09 01:17:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 3107 transitions. [2024-11-09 01:17:39,424 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 3107 transitions. Word has length 73 [2024-11-09 01:17:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:39,425 INFO L471 AbstractCegarLoop]: Abstraction has 2023 states and 3107 transitions. [2024-11-09 01:17:39,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:17:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 3107 transitions. [2024-11-09 01:17:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 01:17:39,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:39,432 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 01:17:39,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 01:17:39,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:39,640 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:39,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:39,641 INFO L85 PathProgramCache]: Analyzing trace with hash -465649502, now seen corresponding path program 1 times [2024-11-09 01:17:39,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:39,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667033099] [2024-11-09 01:17:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:39,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:17:40,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667033099] [2024-11-09 01:17:40,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667033099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:40,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217706662] [2024-11-09 01:17:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:40,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:40,020 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:40,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:17:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:40,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 01:17:40,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 01:17:40,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:17:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:17:41,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217706662] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:41,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:17:41,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2024-11-09 01:17:41,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057435250] [2024-11-09 01:17:41,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:41,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 01:17:41,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:41,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 01:17:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-09 01:17:41,085 INFO L87 Difference]: Start difference. First operand 2023 states and 3107 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 01:17:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:44,994 INFO L93 Difference]: Finished difference Result 4780 states and 7546 transitions. [2024-11-09 01:17:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 01:17:44,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2024-11-09 01:17:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:45,020 INFO L225 Difference]: With dead ends: 4780 [2024-11-09 01:17:45,021 INFO L226 Difference]: Without dead ends: 3625 [2024-11-09 01:17:45,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2024-11-09 01:17:45,030 INFO L432 NwaCegarLoop]: 595 mSDtfsCounter, 1796 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 812 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:45,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1875 Valid, 2891 Invalid, 2902 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [812 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-09 01:17:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2024-11-09 01:17:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 3559. [2024-11-09 01:17:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 2529 states have (on average 1.4887307236061684) internal successors, (3765), 2672 states have internal predecessors, (3765), 802 states have call successors, (802), 216 states have call predecessors, (802), 227 states have return successors, (973), 778 states have call predecessors, (973), 797 states have call successors, (973) [2024-11-09 01:17:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5540 transitions. [2024-11-09 01:17:45,280 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5540 transitions. Word has length 75 [2024-11-09 01:17:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:45,281 INFO L471 AbstractCegarLoop]: Abstraction has 3559 states and 5540 transitions. [2024-11-09 01:17:45,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 01:17:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5540 transitions. [2024-11-09 01:17:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-09 01:17:45,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:45,286 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 01:17:45,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 01:17:45,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 01:17:45,487 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:45,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash 546931241, now seen corresponding path program 1 times [2024-11-09 01:17:45,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:45,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326018559] [2024-11-09 01:17:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:17:45,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:45,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326018559] [2024-11-09 01:17:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326018559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446304418] [2024-11-09 01:17:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:45,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:45,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:17:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:46,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 01:17:46,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 01:17:46,346 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:46,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446304418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:46,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:46,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-09 01:17:46,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114345021] [2024-11-09 01:17:46,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:46,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:17:46,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:17:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 01:17:46,348 INFO L87 Difference]: Start difference. First operand 3559 states and 5540 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 01:17:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:47,063 INFO L93 Difference]: Finished difference Result 6883 states and 10752 transitions. [2024-11-09 01:17:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:17:47,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2024-11-09 01:17:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:47,090 INFO L225 Difference]: With dead ends: 6883 [2024-11-09 01:17:47,090 INFO L226 Difference]: Without dead ends: 3336 [2024-11-09 01:17:47,114 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:17:47,116 INFO L432 NwaCegarLoop]: 612 mSDtfsCounter, 477 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:47,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1681 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:17:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2024-11-09 01:17:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3319. [2024-11-09 01:17:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 2365 states have (on average 1.4858350951374206) internal successors, (3514), 2494 states have internal predecessors, (3514), 739 states have call successors, (739), 204 states have call predecessors, (739), 214 states have return successors, (909), 716 states have call predecessors, (909), 734 states have call successors, (909) [2024-11-09 01:17:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 5162 transitions. [2024-11-09 01:17:47,474 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 5162 transitions. Word has length 76 [2024-11-09 01:17:47,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:47,474 INFO L471 AbstractCegarLoop]: Abstraction has 3319 states and 5162 transitions. [2024-11-09 01:17:47,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 01:17:47,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 5162 transitions. [2024-11-09 01:17:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 01:17:47,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:47,480 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] [2024-11-09 01:17:47,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 01:17:47,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 01:17:47,681 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:47,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:47,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1627488474, now seen corresponding path program 1 times [2024-11-09 01:17:47,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:47,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206146521] [2024-11-09 01:17:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:47,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:17:47,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:47,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206146521] [2024-11-09 01:17:47,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206146521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355542914] [2024-11-09 01:17:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:47,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:47,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:47,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:47,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 01:17:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:48,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:17:48,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:48,474 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 01:17:48,474 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:48,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355542914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:48,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:48,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:17:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592217014] [2024-11-09 01:17:48,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:48,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:17:48,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:17:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:17:48,476 INFO L87 Difference]: Start difference. First operand 3319 states and 5162 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:17:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:48,901 INFO L93 Difference]: Finished difference Result 7477 states and 11734 transitions. [2024-11-09 01:17:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:17:48,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2024-11-09 01:17:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:48,934 INFO L225 Difference]: With dead ends: 7477 [2024-11-09 01:17:48,934 INFO L226 Difference]: Without dead ends: 4170 [2024-11-09 01:17:48,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 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 01:17:48,953 INFO L432 NwaCegarLoop]: 707 mSDtfsCounter, 527 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:48,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1168 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:17:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2024-11-09 01:17:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3284. [2024-11-09 01:17:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2341 states have (on average 1.482699700982486) internal successors, (3471), 2470 states have internal predecessors, (3471), 732 states have call successors, (732), 201 states have call predecessors, (732), 210 states have return successors, (887), 708 states have call predecessors, (887), 727 states have call successors, (887) [2024-11-09 01:17:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5090 transitions. [2024-11-09 01:17:49,260 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5090 transitions. Word has length 75 [2024-11-09 01:17:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:49,261 INFO L471 AbstractCegarLoop]: Abstraction has 3284 states and 5090 transitions. [2024-11-09 01:17:49,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:17:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5090 transitions. [2024-11-09 01:17:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 01:17:49,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:49,264 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 01:17:49,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 01:17:49,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 01:17:49,464 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:49,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash -844875653, now seen corresponding path program 1 times [2024-11-09 01:17:49,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:49,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711502297] [2024-11-09 01:17:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:17:49,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:49,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711502297] [2024-11-09 01:17:49,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711502297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:49,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462005981] [2024-11-09 01:17:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:49,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:49,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:49,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 01:17:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:50,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 1522 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 01:17:50,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 01:17:50,387 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:50,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462005981] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:50,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:50,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:17:50,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041877292] [2024-11-09 01:17:50,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:50,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:17:50,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:17:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:17:50,389 INFO L87 Difference]: Start difference. First operand 3284 states and 5090 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 01:17:51,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:51,277 INFO L93 Difference]: Finished difference Result 5996 states and 9318 transitions. [2024-11-09 01:17:51,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:17:51,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2024-11-09 01:17:51,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:51,315 INFO L225 Difference]: With dead ends: 5996 [2024-11-09 01:17:51,315 INFO L226 Difference]: Without dead ends: 3305 [2024-11-09 01:17:51,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:17:51,333 INFO L432 NwaCegarLoop]: 667 mSDtfsCounter, 414 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:51,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 2361 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:17:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2024-11-09 01:17:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 3288. [2024-11-09 01:17:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 2341 states have (on average 1.482699700982486) internal successors, (3471), 2474 states have internal predecessors, (3471), 736 states have call successors, (736), 201 states have call predecessors, (736), 210 states have return successors, (891), 708 states have call predecessors, (891), 731 states have call successors, (891) [2024-11-09 01:17:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 5098 transitions. [2024-11-09 01:17:51,624 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 5098 transitions. Word has length 79 [2024-11-09 01:17:51,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:51,624 INFO L471 AbstractCegarLoop]: Abstraction has 3288 states and 5098 transitions. [2024-11-09 01:17:51,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 01:17:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 5098 transitions. [2024-11-09 01:17:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 01:17:51,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:51,629 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 01:17:51,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 01:17:51,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:51,833 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:51,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2041390732, now seen corresponding path program 1 times [2024-11-09 01:17:51,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:51,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532879230] [2024-11-09 01:17:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:51,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 01:17:52,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:52,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532879230] [2024-11-09 01:17:52,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532879230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:52,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6695152] [2024-11-09 01:17:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:52,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:52,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:52,264 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:52,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 01:17:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:52,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 01:17:52,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 01:17:52,801 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:52,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6695152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:52,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:52,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:17:52,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218187609] [2024-11-09 01:17:52,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:52,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:17:52,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:17:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:17:52,804 INFO L87 Difference]: Start difference. First operand 3288 states and 5098 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-09 01:17:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:53,282 INFO L93 Difference]: Finished difference Result 6202 states and 9699 transitions. [2024-11-09 01:17:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:17:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2024-11-09 01:17:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:53,314 INFO L225 Difference]: With dead ends: 6202 [2024-11-09 01:17:53,314 INFO L226 Difference]: Without dead ends: 3368 [2024-11-09 01:17:53,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:17:53,333 INFO L432 NwaCegarLoop]: 551 mSDtfsCounter, 0 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:53,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2182 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:17:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2024-11-09 01:17:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3350. [2024-11-09 01:17:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 2383 states have (on average 1.4741921947125471) internal successors, (3513), 2525 states have internal predecessors, (3513), 736 states have call successors, (736), 201 states have call predecessors, (736), 230 states have return successors, (961), 719 states have call predecessors, (961), 731 states have call successors, (961) [2024-11-09 01:17:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5210 transitions. [2024-11-09 01:17:53,593 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5210 transitions. Word has length 99 [2024-11-09 01:17:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:53,593 INFO L471 AbstractCegarLoop]: Abstraction has 3350 states and 5210 transitions. [2024-11-09 01:17:53,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-09 01:17:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5210 transitions. [2024-11-09 01:17:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 01:17:53,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:53,601 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:17:53,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 01:17:53,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:53,805 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:53,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1060174902, now seen corresponding path program 1 times [2024-11-09 01:17:53,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:53,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804081132] [2024-11-09 01:17:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 01:17:54,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:54,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804081132] [2024-11-09 01:17:54,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804081132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:54,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361458011] [2024-11-09 01:17:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:54,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:54,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:54,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:54,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 01:17:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:54,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 01:17:54,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:17:54,790 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:17:54,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361458011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:54,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:17:54,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-09 01:17:54,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396667624] [2024-11-09 01:17:54,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:54,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 01:17:54,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:54,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 01:17:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-09 01:17:54,793 INFO L87 Difference]: Start difference. First operand 3350 states and 5210 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-09 01:17:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:58,511 INFO L93 Difference]: Finished difference Result 7479 states and 11820 transitions. [2024-11-09 01:17:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 01:17:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2024-11-09 01:17:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:58,560 INFO L225 Difference]: With dead ends: 7479 [2024-11-09 01:17:58,560 INFO L226 Difference]: Without dead ends: 4025 [2024-11-09 01:17:58,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-11-09 01:17:58,578 INFO L432 NwaCegarLoop]: 395 mSDtfsCounter, 1288 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 3158 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 3867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 3158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:58,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1376 Valid, 1705 Invalid, 3867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 3158 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-09 01:17:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2024-11-09 01:17:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3439. [2024-11-09 01:17:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 2437 states have (on average 1.4698399671727533) internal successors, (3582), 2584 states have internal predecessors, (3582), 769 states have call successors, (769), 201 states have call predecessors, (769), 232 states have return successors, (1055), 749 states have call predecessors, (1055), 764 states have call successors, (1055) [2024-11-09 01:17:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 5406 transitions. [2024-11-09 01:17:58,911 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 5406 transitions. Word has length 117 [2024-11-09 01:17:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:58,913 INFO L471 AbstractCegarLoop]: Abstraction has 3439 states and 5406 transitions. [2024-11-09 01:17:58,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-09 01:17:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 5406 transitions. [2024-11-09 01:17:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 01:17:58,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:58,921 INFO L215 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:17:58,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 01:17:59,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:59,121 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:59,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash 910068237, now seen corresponding path program 1 times [2024-11-09 01:17:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:59,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410971733] [2024-11-09 01:17:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 01:17:59,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:59,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410971733] [2024-11-09 01:17:59,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410971733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:59,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469306662] [2024-11-09 01:17:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:59,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:59,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:59,512 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:59,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 01:17:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:59,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:17:59,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:18:00,073 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:18:00,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469306662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:18:00,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:18:00,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-09 01:18:00,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905553663] [2024-11-09 01:18:00,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:18:00,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:18:00,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:00,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:18:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:18:00,075 INFO L87 Difference]: Start difference. First operand 3439 states and 5406 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-09 01:18:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:00,694 INFO L93 Difference]: Finished difference Result 8056 states and 12850 transitions. [2024-11-09 01:18:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:18:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2024-11-09 01:18:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:00,744 INFO L225 Difference]: With dead ends: 8056 [2024-11-09 01:18:00,745 INFO L226 Difference]: Without dead ends: 4629 [2024-11-09 01:18:00,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:18:00,769 INFO L432 NwaCegarLoop]: 728 mSDtfsCounter, 463 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:00,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1264 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:18:00,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2024-11-09 01:18:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 4561. [2024-11-09 01:18:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 3240 states have (on average 1.4719135802469137) internal successors, (4769), 3440 states have internal predecessors, (4769), 1013 states have call successors, (1013), 263 states have call predecessors, (1013), 307 states have return successors, (1386), 989 states have call predecessors, (1386), 1008 states have call successors, (1386) [2024-11-09 01:18:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 7168 transitions. [2024-11-09 01:18:01,332 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 7168 transitions. Word has length 118 [2024-11-09 01:18:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:01,333 INFO L471 AbstractCegarLoop]: Abstraction has 4561 states and 7168 transitions. [2024-11-09 01:18:01,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-09 01:18:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 7168 transitions. [2024-11-09 01:18:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:18:01,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:01,350 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:18:01,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 01:18:01,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:01,551 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:18:01,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -535123428, now seen corresponding path program 1 times [2024-11-09 01:18:01,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:01,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743080248] [2024-11-09 01:18:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:01,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 01:18:02,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743080248] [2024-11-09 01:18:02,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743080248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:02,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135144640] [2024-11-09 01:18:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:02,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:02,144 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:02,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 01:18:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:02,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:18:02,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 01:18:02,836 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:18:02,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135144640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:18:02,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:18:02,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-11-09 01:18:02,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692674438] [2024-11-09 01:18:02,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:18:02,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:18:02,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:02,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:18:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-09 01:18:02,840 INFO L87 Difference]: Start difference. First operand 4561 states and 7168 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-11-09 01:18:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:04,303 INFO L93 Difference]: Finished difference Result 9155 states and 14684 transitions. [2024-11-09 01:18:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:18:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2024-11-09 01:18:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:04,350 INFO L225 Difference]: With dead ends: 9155 [2024-11-09 01:18:04,350 INFO L226 Difference]: Without dead ends: 5457 [2024-11-09 01:18:04,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:18:04,374 INFO L432 NwaCegarLoop]: 580 mSDtfsCounter, 571 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:04,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 1314 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 01:18:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5457 states. [2024-11-09 01:18:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5457 to 5341. [2024-11-09 01:18:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5341 states, 3688 states have (on average 1.4655639913232104) internal successors, (5405), 3937 states have internal predecessors, (5405), 1277 states have call successors, (1277), 339 states have call predecessors, (1277), 375 states have return successors, (1706), 1244 states have call predecessors, (1706), 1270 states have call successors, (1706) [2024-11-09 01:18:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5341 states to 5341 states and 8388 transitions. [2024-11-09 01:18:04,921 INFO L78 Accepts]: Start accepts. Automaton has 5341 states and 8388 transitions. Word has length 123 [2024-11-09 01:18:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:04,922 INFO L471 AbstractCegarLoop]: Abstraction has 5341 states and 8388 transitions. [2024-11-09 01:18:04,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-11-09 01:18:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5341 states and 8388 transitions. [2024-11-09 01:18:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 01:18:04,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:04,935 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:18:04,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:05,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 01:18:05,140 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:18:05,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1627809641, now seen corresponding path program 1 times [2024-11-09 01:18:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:05,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884759345] [2024-11-09 01:18:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 01:18:05,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:05,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884759345] [2024-11-09 01:18:05,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884759345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71524241] [2024-11-09 01:18:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:05,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:05,667 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:05,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 01:18:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:06,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:18:06,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 01:18:06,387 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:18:06,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71524241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:18:06,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:18:06,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-11-09 01:18:06,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631984489] [2024-11-09 01:18:06,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:18:06,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:18:06,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:06,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:18:06,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-09 01:18:06,390 INFO L87 Difference]: Start difference. First operand 5341 states and 8388 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-11-09 01:18:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:07,982 INFO L93 Difference]: Finished difference Result 12835 states and 20579 transitions. [2024-11-09 01:18:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:18:07,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2024-11-09 01:18:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:08,050 INFO L225 Difference]: With dead ends: 12835 [2024-11-09 01:18:08,050 INFO L226 Difference]: Without dead ends: 8335 [2024-11-09 01:18:08,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:18:08,085 INFO L432 NwaCegarLoop]: 904 mSDtfsCounter, 523 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:08,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1987 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:18:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2024-11-09 01:18:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 8311. [2024-11-09 01:18:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8311 states, 5623 states have (on average 1.4677218566601458) internal successors, (8253), 6042 states have internal predecessors, (8253), 2104 states have call successors, (2104), 545 states have call predecessors, (2104), 583 states have return successors, (2706), 2047 states have call predecessors, (2706), 2093 states have call successors, (2706) [2024-11-09 01:18:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8311 states to 8311 states and 13063 transitions. [2024-11-09 01:18:09,144 INFO L78 Accepts]: Start accepts. Automaton has 8311 states and 13063 transitions. Word has length 124 [2024-11-09 01:18:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:09,145 INFO L471 AbstractCegarLoop]: Abstraction has 8311 states and 13063 transitions. [2024-11-09 01:18:09,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-11-09 01:18:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 8311 states and 13063 transitions. [2024-11-09 01:18:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 01:18:09,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:09,163 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:18:09,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:09,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 01:18:09,364 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:18:09,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1482951720, now seen corresponding path program 1 times [2024-11-09 01:18:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:09,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815987057] [2024-11-09 01:18:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 01:18:09,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:09,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815987057] [2024-11-09 01:18:09,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815987057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:09,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718506970] [2024-11-09 01:18:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:09,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:09,933 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:09,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 01:18:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:10,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 1848 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 01:18:10,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:18:10,555 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:18:10,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718506970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:18:10,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:18:10,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2024-11-09 01:18:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950689400] [2024-11-09 01:18:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:18:10,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 01:18:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 01:18:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-11-09 01:18:10,558 INFO L87 Difference]: Start difference. First operand 8311 states and 13063 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-09 01:18:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:12,511 INFO L93 Difference]: Finished difference Result 20059 states and 31682 transitions. [2024-11-09 01:18:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 01:18:12,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2024-11-09 01:18:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:12,690 INFO L225 Difference]: With dead ends: 20059 [2024-11-09 01:18:12,690 INFO L226 Difference]: Without dead ends: 12611 [2024-11-09 01:18:12,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2024-11-09 01:18:12,768 INFO L432 NwaCegarLoop]: 615 mSDtfsCounter, 521 mSDsluCounter, 3046 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 3661 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:12,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 3661 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:18:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12611 states. [2024-11-09 01:18:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12611 to 11431. [2024-11-09 01:18:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11431 states, 7712 states have (on average 1.4727697095435686) internal successors, (11358), 8284 states have internal predecessors, (11358), 2913 states have call successors, (2913), 759 states have call predecessors, (2913), 805 states have return successors, (3761), 2855 states have call predecessors, (3761), 2896 states have call successors, (3761) [2024-11-09 01:18:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11431 states to 11431 states and 18032 transitions. [2024-11-09 01:18:14,011 INFO L78 Accepts]: Start accepts. Automaton has 11431 states and 18032 transitions. Word has length 125 [2024-11-09 01:18:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:14,012 INFO L471 AbstractCegarLoop]: Abstraction has 11431 states and 18032 transitions. [2024-11-09 01:18:14,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-09 01:18:14,012 INFO L276 IsEmpty]: Start isEmpty. Operand 11431 states and 18032 transitions. [2024-11-09 01:18:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-09 01:18:14,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:14,029 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:18:14,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:14,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 01:18:14,230 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:18:14,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:14,230 INFO L85 PathProgramCache]: Analyzing trace with hash -761943373, now seen corresponding path program 1 times [2024-11-09 01:18:14,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:14,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673026826] [2024-11-09 01:18:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:14,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 01:18:14,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:14,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673026826] [2024-11-09 01:18:14,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673026826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:14,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86984707] [2024-11-09 01:18:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:14,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:14,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:14,707 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:14,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 01:18:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:15,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 1857 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 01:18:15,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:18:15,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 01:18:15,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86984707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:15,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056073601] [2024-11-09 01:18:15,807 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2024-11-09 01:18:15,807 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:15,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:15,818 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:15,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:40,478 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2024-11-09 01:19:46,462 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 56 for LOIs [2024-11-09 01:19:46,471 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 44 for LOIs [2024-11-09 01:19:46,978 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 38 for LOIs [2024-11-09 01:19:46,984 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 446 for LOIs [2024-11-09 01:19:47,472 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 683 for LOIs [2024-11-09 01:19:51,982 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2024-11-09 01:19:59,543 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2024-11-09 01:20:00,168 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2024-11-09 01:20:00,188 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 7 for LOIs [2024-11-09 01:20:00,190 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2024-11-09 01:20:11,374 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2024-11-09 01:20:12,087 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2024-11-09 01:20:12,473 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:20:28,879 WARN L286 SmtUtils]: Spent 6.51s on a formula simplification that was a NOOP. DAG size: 595 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:20:35,438 WARN L286 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 595 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:20:41,318 WARN L286 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 569 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:21:00,891 WARN L286 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 571 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:21:06,855 WARN L286 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 571 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:21:12,958 WARN L286 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 573 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:21:19,114 WARN L286 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 573 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:21:52,523 WARN L286 SmtUtils]: Spent 24.32s on a formula simplification. DAG size of input: 659 DAG size of output: 631 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:22:18,420 WARN L286 SmtUtils]: Spent 24.91s on a formula simplification. DAG size of input: 668 DAG size of output: 640 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:22:44,192 WARN L286 SmtUtils]: Spent 24.62s on a formula simplification. DAG size of input: 673 DAG size of output: 642 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:23:10,718 WARN L286 SmtUtils]: Spent 25.50s on a formula simplification. DAG size of input: 676 DAG size of output: 642 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:23:38,060 WARN L286 SmtUtils]: Spent 25.15s on a formula simplification. DAG size of input: 675 DAG size of output: 636 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:24:22,854 WARN L286 SmtUtils]: Spent 44.00s on a formula simplification. DAG size of input: 683 DAG size of output: 646 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:25:07,371 WARN L286 SmtUtils]: Spent 43.70s on a formula simplification. DAG size of input: 714 DAG size of output: 680 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:25:33,246 WARN L286 SmtUtils]: Spent 24.40s on a formula simplification. DAG size of input: 676 DAG size of output: 638 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:25:59,182 WARN L286 SmtUtils]: Spent 24.49s on a formula simplification. DAG size of input: 676 DAG size of output: 638 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:26:05,290 WARN L286 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 631 DAG size of output: 593 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:26:11,277 WARN L286 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 627 DAG size of output: 591 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:26:20,586 WARN L286 SmtUtils]: Spent 8.72s on a formula simplification. DAG size of input: 446 DAG size of output: 436 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:26:30,021 WARN L286 SmtUtils]: Spent 8.84s on a formula simplification. DAG size of input: 472 DAG size of output: 467 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:26:50,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '226968#(and (<= 1 |#StackHeapBarrier|) (or (and (not (= ~calls_0~0 0)) (= ~currentHeading~0 1) (exists ((|v_old(~currentHeading~0)_AFTER_CALL_54| Int)) (and (<= 0 (+ |v_old(~currentHeading~0)_AFTER_CALL_54| 2147483648)) (<= |v_old(~currentHeading~0)_AFTER_CALL_54| 2147483647) (not (= |v_old(~currentHeading~0)_AFTER_CALL_54| 1)))) (not (= ~doorState~0 1)) (= ~currentFloorID~0 1)) (and (not (= ~calls_0~0 0)) (= ~currentHeading~0 1) (exists ((|v_continueInDirection_#in~dir_AFTER_CALL_25| Int)) (and (not (= |v_continueInDirection_#in~dir_AFTER_CALL_25| 1)) (<= 0 (+ |v_continueInDirection_#in~dir_AFTER_CALL_25| 2147483648)) (<= |v_continueInDirection_#in~dir_AFTER_CALL_25| 2147483647))) (not (= ~doorState~0 1)) (= ~currentFloorID~0 1))) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (<= 0 (+ ~calls_0~0 2147483648)) (= ~head~0.base 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= ~calls_0~0 2147483647) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12))' at error location [2024-11-09 01:26:50,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:26:50,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:26:50,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-09 01:26:50,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730882498] [2024-11-09 01:26:50,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:26:50,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 01:26:50,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:26:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 01:26:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=5228, Unknown=0, NotChecked=0, Total=5700 [2024-11-09 01:26:50,610 INFO L87 Difference]: Start difference. First operand 11431 states and 18032 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-09 01:27:05,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:27:05,769 INFO L93 Difference]: Finished difference Result 51259 states and 85879 transitions. [2024-11-09 01:27:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-09 01:27:05,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2024-11-09 01:27:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:27:06,036 INFO L225 Difference]: With dead ends: 51259 [2024-11-09 01:27:06,036 INFO L226 Difference]: Without dead ends: 35606 [2024-11-09 01:27:06,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 326 SyntacticMatches, 6 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7604 ImplicationChecksByTransitivity, 400.3s TimeCoverageRelationStatistics Valid=1100, Invalid=17532, Unknown=0, NotChecked=0, Total=18632 [2024-11-09 01:27:06,202 INFO L432 NwaCegarLoop]: 683 mSDtfsCounter, 6109 mSDsluCounter, 5803 mSDsCounter, 0 mSdLazyCounter, 12882 mSolverCounterSat, 2820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6256 SdHoareTripleChecker+Valid, 6486 SdHoareTripleChecker+Invalid, 15702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2820 IncrementalHoareTripleChecker+Valid, 12882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:27:06,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6256 Valid, 6486 Invalid, 15702 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2820 Valid, 12882 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2024-11-09 01:27:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35606 states. [2024-11-09 01:27:08,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35606 to 29035. [2024-11-09 01:27:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29035 states, 19759 states have (on average 1.4697606154157599) internal successors, (29041), 21490 states have internal predecessors, (29041), 7301 states have call successors, (7301), 1763 states have call predecessors, (7301), 1974 states have return successors, (10812), 6640 states have call predecessors, (10812), 7273 states have call successors, (10812) [2024-11-09 01:27:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29035 states to 29035 states and 47154 transitions. [2024-11-09 01:27:09,372 INFO L78 Accepts]: Start accepts. Automaton has 29035 states and 47154 transitions. Word has length 127 [2024-11-09 01:27:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:27:09,373 INFO L471 AbstractCegarLoop]: Abstraction has 29035 states and 47154 transitions. [2024-11-09 01:27:09,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-09 01:27:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 29035 states and 47154 transitions. [2024-11-09 01:27:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-09 01:27:09,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:27:09,392 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 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] [2024-11-09 01:27:09,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 01:27:09,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 01:27:09,597 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:27:09,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:27:09,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1861179725, now seen corresponding path program 1 times [2024-11-09 01:27:09,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:27:09,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865552279] [2024-11-09 01:27:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:27:09,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:27:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 01:27:10,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:27:10,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865552279] [2024-11-09 01:27:10,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865552279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:27:10,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099126664] [2024-11-09 01:27:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:27:10,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:10,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:27:10,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:27:10,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 01:27:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:10,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:27:10,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:27:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 01:27:10,740 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:27:10,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099126664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:27:10,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:27:10,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-09 01:27:10,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646184875] [2024-11-09 01:27:10,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:27:10,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:27:10,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:27:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:27:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 01:27:10,743 INFO L87 Difference]: Start difference. First operand 29035 states and 47154 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-11-09 01:27:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:27:13,423 INFO L93 Difference]: Finished difference Result 58962 states and 97430 transitions. [2024-11-09 01:27:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:27:13,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2024-11-09 01:27:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:27:13,768 INFO L225 Difference]: With dead ends: 58962 [2024-11-09 01:27:13,768 INFO L226 Difference]: Without dead ends: 27257 [2024-11-09 01:27:13,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 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 01:27:13,981 INFO L432 NwaCegarLoop]: 597 mSDtfsCounter, 187 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:27:13,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1551 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:27:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27257 states. [2024-11-09 01:27:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27257 to 27141. [2024-11-09 01:27:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27141 states, 18135 states have (on average 1.4547559966914805) internal successors, (26382), 19893 states have internal predecessors, (26382), 7054 states have call successors, (7054), 1718 states have call predecessors, (7054), 1951 states have return successors, (10405), 6388 states have call predecessors, (10405), 7026 states have call successors, (10405) [2024-11-09 01:27:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27141 states to 27141 states and 43841 transitions. [2024-11-09 01:27:16,928 INFO L78 Accepts]: Start accepts. Automaton has 27141 states and 43841 transitions. Word has length 136 [2024-11-09 01:27:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:27:16,930 INFO L471 AbstractCegarLoop]: Abstraction has 27141 states and 43841 transitions. [2024-11-09 01:27:16,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-11-09 01:27:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 27141 states and 43841 transitions. [2024-11-09 01:27:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-09 01:27:16,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:27:16,951 INFO L215 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:27:16,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 01:27:17,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 01:27:17,156 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:27:17,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:27:17,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1642478370, now seen corresponding path program 1 times [2024-11-09 01:27:17,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:27:17,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231184406] [2024-11-09 01:27:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:27:17,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:27:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-09 01:27:18,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:27:18,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231184406] [2024-11-09 01:27:18,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231184406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:27:18,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303091015] [2024-11-09 01:27:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:27:18,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:18,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:27:18,519 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:27:18,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 01:27:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:19,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 01:27:19,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:27:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 01:27:19,185 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:27:19,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303091015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:27:19,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:27:19,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2024-11-09 01:27:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249508672] [2024-11-09 01:27:19,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:27:19,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 01:27:19,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:27:19,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 01:27:19,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2024-11-09 01:27:19,188 INFO L87 Difference]: Start difference. First operand 27141 states and 43841 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2024-11-09 01:27:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:27:22,555 INFO L93 Difference]: Finished difference Result 52764 states and 85676 transitions. [2024-11-09 01:27:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 01:27:22,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2024-11-09 01:27:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:27:22,850 INFO L225 Difference]: With dead ends: 52764 [2024-11-09 01:27:22,850 INFO L226 Difference]: Without dead ends: 27083 [2024-11-09 01:27:23,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2024-11-09 01:27:23,178 INFO L432 NwaCegarLoop]: 990 mSDtfsCounter, 482 mSDsluCounter, 3990 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 4980 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:27:23,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 4980 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:27:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27083 states. [2024-11-09 01:27:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27083 to 25944. [2024-11-09 01:27:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25944 states, 17298 states have (on average 1.4516129032258065) internal successors, (25110), 18981 states have internal predecessors, (25110), 6721 states have call successors, (6721), 1683 states have call predecessors, (6721), 1924 states have return successors, (9956), 6106 states have call predecessors, (9956), 6685 states have call successors, (9956) [2024-11-09 01:27:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25944 states to 25944 states and 41787 transitions. [2024-11-09 01:27:25,528 INFO L78 Accepts]: Start accepts. Automaton has 25944 states and 41787 transitions. Word has length 139 [2024-11-09 01:27:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:27:25,529 INFO L471 AbstractCegarLoop]: Abstraction has 25944 states and 41787 transitions. [2024-11-09 01:27:25,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2024-11-09 01:27:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 25944 states and 41787 transitions. [2024-11-09 01:27:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 01:27:25,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:27:25,547 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 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] [2024-11-09 01:27:25,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 01:27:25,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:25,748 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:27:25,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:27:25,749 INFO L85 PathProgramCache]: Analyzing trace with hash -317600337, now seen corresponding path program 1 times [2024-11-09 01:27:25,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:27:25,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933790373] [2024-11-09 01:27:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:27:25,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:27:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 01:27:26,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:27:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933790373] [2024-11-09 01:27:26,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933790373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:27:26,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213147823] [2024-11-09 01:27:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:27:26,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:26,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:27:26,767 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:27:26,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4f539-469e-48d8-806f-1df4174045aa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 01:27:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:27,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 01:27:27,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:27:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 01:27:27,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:27:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 01:27:28,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213147823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:27:28,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1248008704] [2024-11-09 01:27:28,032 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2024-11-09 01:27:28,032 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:27:28,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:27:28,033 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:27:28,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:27:40,842 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 568 for LOIs