./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ --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 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:14:47,735 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:14:47,802 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:14:47,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:14:47,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:14:47,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:14:47,834 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:14:47,835 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:14:47,836 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:14:47,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:14:47,837 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:14:47,837 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:14:47,838 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:14:47,838 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:14:47,839 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:14:47,840 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:14:47,840 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:14:47,841 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:14:47,841 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:14:47,842 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:14:47,843 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:14:47,844 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:14:47,844 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:14:47,845 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:14:47,846 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:14:47,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:14:47,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:14:47,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:14:47,848 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:14:47,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:14:47,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:14:47,849 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:14:47,850 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:14:47,850 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:14:47,851 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:14:47,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:14:47,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:14:47,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:14:47,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:14:47,853 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:14:47,853 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:14:47,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:14:47,854 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:14:47,854 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:14:47,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:14:47,855 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_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 [2023-11-19 05:14:48,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:14:48,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:14:48,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:14:48,160 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:14:48,160 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:14:48,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2023-11-19 05:14:51,397 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:14:51,750 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:14:51,750 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2023-11-19 05:14:51,780 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/data/22a7ba0ca/b3a138433cc5426a97943dfc068f7c03/FLAG6bdd545aa [2023-11-19 05:14:51,794 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/data/22a7ba0ca/b3a138433cc5426a97943dfc068f7c03 [2023-11-19 05:14:51,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:14:51,799 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:14:51,801 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:14:51,801 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:14:51,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:14:51,810 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:14:51" (1/1) ... [2023-11-19 05:14:51,811 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d1de93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:51, skipping insertion in model container [2023-11-19 05:14:51,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:14:51" (1/1) ... [2023-11-19 05:14:51,890 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:14:52,405 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2023-11-19 05:14:52,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:14:52,524 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:14:52,535 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2023-11-19 05:14:52,537 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [414] [2023-11-19 05:14:52,537 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [434] [2023-11-19 05:14:52,538 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2095] [2023-11-19 05:14:52,538 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2449] [2023-11-19 05:14:52,539 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2458] [2023-11-19 05:14:52,540 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2549] [2023-11-19 05:14:52,540 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [3210] [2023-11-19 05:14:52,540 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3299] [2023-11-19 05:14:52,540 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3417] [2023-11-19 05:14:52,669 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2023-11-19 05:14:52,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:14:52,742 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:14:52,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52 WrapperNode [2023-11-19 05:14:52,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:14:52,744 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:14:52,744 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:14:52,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:14:52,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:52,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:52,877 INFO L138 Inliner]: procedures = 96, calls = 352, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 893 [2023-11-19 05:14:52,877 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:14:52,878 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:14:52,878 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:14:52,879 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:14:52,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:52,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:52,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:52,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:52,926 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:52,959 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:52,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:52,985 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:53,003 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:14:53,004 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:14:53,004 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:14:53,004 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:14:53,005 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (1/1) ... [2023-11-19 05:14:53,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:14:53,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:53,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:14:53,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:14:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-19 05:14:53,110 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-19 05:14:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:14:53,111 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 05:14:53,111 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 05:14:53,111 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-19 05:14:53,111 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-19 05:14:53,112 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:14:53,112 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:14:53,112 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-11-19 05:14:53,113 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-11-19 05:14:53,113 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:14:53,113 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:14:53,114 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 05:14:53,115 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 05:14:53,115 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:14:53,115 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:14:53,115 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 05:14:53,117 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 05:14:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:14:53,118 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:14:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:14:53,118 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:14:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:14:53,119 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:14:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:14:53,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:14:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:14:53,119 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:14:53,120 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:14:53,120 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:14:53,120 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:14:53,120 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:14:53,120 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 05:14:53,121 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 05:14:53,121 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:14:53,121 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:14:53,121 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:14:53,121 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:14:53,121 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:14:53,122 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:14:53,122 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:14:53,122 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:14:53,122 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:14:53,122 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:14:53,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:14:53,123 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 05:14:53,123 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 05:14:53,123 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:14:53,124 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:14:53,124 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:14:53,125 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:14:53,125 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:14:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:14:53,126 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 05:14:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 05:14:53,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:14:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:14:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:14:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:14:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-19 05:14:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-19 05:14:53,326 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:14:53,329 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:14:54,677 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:14:55,585 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:14:55,586 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 05:14:55,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:14:55 BoogieIcfgContainer [2023-11-19 05:14:55,605 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:14:55,610 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:14:55,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:14:55,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:14:55,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:14:51" (1/3) ... [2023-11-19 05:14:55,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e46a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:14:55, skipping insertion in model container [2023-11-19 05:14:55,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:52" (2/3) ... [2023-11-19 05:14:55,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e46a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:14:55, skipping insertion in model container [2023-11-19 05:14:55,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:14:55" (3/3) ... [2023-11-19 05:14:55,620 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product24.cil.c [2023-11-19 05:14:55,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:14:55,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:14:55,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:14:55,738 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a161740, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:14:55,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:14:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 443 states, 302 states have (on average 1.576158940397351) internal successors, (476), 322 states have internal predecessors, (476), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2023-11-19 05:14:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 05:14:55,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:55,784 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-19 05:14:55,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:55,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash -845608978, now seen corresponding path program 1 times [2023-11-19 05:14:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:55,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246297490] [2023-11-19 05:14:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:55,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:14:56,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:56,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246297490] [2023-11-19 05:14:56,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246297490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:56,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:56,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:14:56,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731121909] [2023-11-19 05:14:56,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:56,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:56,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:57,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:57,026 INFO L87 Difference]: Start difference. First operand has 443 states, 302 states have (on average 1.576158940397351) internal successors, (476), 322 states have internal predecessors, (476), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-19 05:15:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:00,466 INFO L93 Difference]: Finished difference Result 1834 states and 2976 transitions. [2023-11-19 05:15:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:15:00,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2023-11-19 05:15:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:00,501 INFO L225 Difference]: With dead ends: 1834 [2023-11-19 05:15:00,502 INFO L226 Difference]: Without dead ends: 1392 [2023-11-19 05:15:00,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:15:00,515 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 2046 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:00,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2127 Valid, 1496 Invalid, 2638 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [473 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 05:15:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2023-11-19 05:15:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1279. [2023-11-19 05:15:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 916 states have (on average 1.5753275109170306) internal successors, (1443), 951 states have internal predecessors, (1443), 292 states have call successors, (292), 71 states have call predecessors, (292), 70 states have return successors, (310), 271 states have call predecessors, (310), 288 states have call successors, (310) [2023-11-19 05:15:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2045 transitions. [2023-11-19 05:15:00,771 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2045 transitions. Word has length 70 [2023-11-19 05:15:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:00,772 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 2045 transitions. [2023-11-19 05:15:00,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-19 05:15:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2045 transitions. [2023-11-19 05:15:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 05:15:00,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:00,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:00,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:15:00,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:00,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:00,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1407392563, now seen corresponding path program 1 times [2023-11-19 05:15:00,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:00,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561043654] [2023-11-19 05:15:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:15:01,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:01,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561043654] [2023-11-19 05:15:01,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561043654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:01,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:01,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:15:01,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390355398] [2023-11-19 05:15:01,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:01,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:15:01,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:01,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:15:01,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:15:01,271 INFO L87 Difference]: Start difference. First operand 1279 states and 2045 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 05:15:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:01,710 INFO L93 Difference]: Finished difference Result 3187 states and 5085 transitions. [2023-11-19 05:15:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:15:01,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 101 [2023-11-19 05:15:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:01,734 INFO L225 Difference]: With dead ends: 3187 [2023-11-19 05:15:01,735 INFO L226 Difference]: Without dead ends: 1923 [2023-11-19 05:15:01,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:15:01,749 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 520 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:01,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 2007 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:15:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-11-19 05:15:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1903. [2023-11-19 05:15:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1363 states have (on average 1.5414526779163609) internal successors, (2101), 1399 states have internal predecessors, (2101), 426 states have call successors, (426), 109 states have call predecessors, (426), 113 states have return successors, (487), 407 states have call predecessors, (487), 420 states have call successors, (487) [2023-11-19 05:15:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 3014 transitions. [2023-11-19 05:15:01,976 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 3014 transitions. Word has length 101 [2023-11-19 05:15:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:01,977 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 3014 transitions. [2023-11-19 05:15:01,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 05:15:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 3014 transitions. [2023-11-19 05:15:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 05:15:01,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:01,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:01,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:15:01,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:01,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:01,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1673084063, now seen corresponding path program 1 times [2023-11-19 05:15:01,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:01,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676429941] [2023-11-19 05:15:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:01,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:15:02,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:02,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676429941] [2023-11-19 05:15:02,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676429941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:02,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:02,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:15:02,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550891106] [2023-11-19 05:15:02,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:02,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:15:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:15:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:15:02,504 INFO L87 Difference]: Start difference. First operand 1903 states and 3014 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 05:15:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:05,746 INFO L93 Difference]: Finished difference Result 5618 states and 8973 transitions. [2023-11-19 05:15:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:15:05,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 102 [2023-11-19 05:15:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:05,789 INFO L225 Difference]: With dead ends: 5618 [2023-11-19 05:15:05,790 INFO L226 Difference]: Without dead ends: 3732 [2023-11-19 05:15:05,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:15:05,813 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 1334 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 3620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:05,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 1724 Invalid, 3620 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [470 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-19 05:15:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2023-11-19 05:15:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3284. [2023-11-19 05:15:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2356 states have (on average 1.5509337860780985) internal successors, (3654), 2422 states have internal predecessors, (3654), 726 states have call successors, (726), 190 states have call predecessors, (726), 201 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2023-11-19 05:15:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5218 transitions. [2023-11-19 05:15:06,162 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5218 transitions. Word has length 102 [2023-11-19 05:15:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:06,163 INFO L495 AbstractCegarLoop]: Abstraction has 3284 states and 5218 transitions. [2023-11-19 05:15:06,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 05:15:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5218 transitions. [2023-11-19 05:15:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 05:15:06,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:06,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:06,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:15:06,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:06,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash 141356463, now seen corresponding path program 1 times [2023-11-19 05:15:06,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:06,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440741918] [2023-11-19 05:15:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:06,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:15:06,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:06,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440741918] [2023-11-19 05:15:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440741918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:06,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743139126] [2023-11-19 05:15:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:06,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:06,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:06,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:06,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:15:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:06,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:15:06,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:15:06,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:06,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743139126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:06,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:06,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-19 05:15:06,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098750698] [2023-11-19 05:15:06,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:06,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:15:06,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:06,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:15:06,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:15:06,871 INFO L87 Difference]: Start difference. First operand 3284 states and 5218 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:15:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:07,276 INFO L93 Difference]: Finished difference Result 6607 states and 10671 transitions. [2023-11-19 05:15:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:15:07,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 106 [2023-11-19 05:15:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:07,316 INFO L225 Difference]: With dead ends: 6607 [2023-11-19 05:15:07,317 INFO L226 Difference]: Without dead ends: 3338 [2023-11-19 05:15:07,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:15:07,353 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 85 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:07,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1821 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:15:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2023-11-19 05:15:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3338. [2023-11-19 05:15:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2401 states have (on average 1.544356518117451) internal successors, (3708), 2467 states have internal predecessors, (3708), 726 states have call successors, (726), 199 states have call predecessors, (726), 210 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2023-11-19 05:15:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5272 transitions. [2023-11-19 05:15:07,747 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5272 transitions. Word has length 106 [2023-11-19 05:15:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:07,750 INFO L495 AbstractCegarLoop]: Abstraction has 3338 states and 5272 transitions. [2023-11-19 05:15:07,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:15:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5272 transitions. [2023-11-19 05:15:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 05:15:07,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:07,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:07,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:07,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:07,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:07,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1908073370, now seen corresponding path program 1 times [2023-11-19 05:15:07,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:07,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214149694] [2023-11-19 05:15:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:07,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:15:08,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:08,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214149694] [2023-11-19 05:15:08,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214149694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320094434] [2023-11-19 05:15:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:08,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:08,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:08,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:08,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:15:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:08,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:15:08,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:15:08,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:08,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320094434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:08,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:08,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-19 05:15:08,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117669036] [2023-11-19 05:15:08,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:08,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:15:08,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:08,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:15:08,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:15:08,716 INFO L87 Difference]: Start difference. First operand 3338 states and 5272 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:15:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:09,134 INFO L93 Difference]: Finished difference Result 6688 states and 10690 transitions. [2023-11-19 05:15:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:15:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 108 [2023-11-19 05:15:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:09,165 INFO L225 Difference]: With dead ends: 6688 [2023-11-19 05:15:09,166 INFO L226 Difference]: Without dead ends: 3329 [2023-11-19 05:15:09,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:15:09,196 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 91 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:09,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1817 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:15:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2023-11-19 05:15:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 3329. [2023-11-19 05:15:09,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3329 states, 2392 states have (on average 1.5351170568561874) internal successors, (3672), 2458 states have internal predecessors, (3672), 726 states have call successors, (726), 199 states have call predecessors, (726), 210 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2023-11-19 05:15:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 5236 transitions. [2023-11-19 05:15:09,446 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 5236 transitions. Word has length 108 [2023-11-19 05:15:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:09,447 INFO L495 AbstractCegarLoop]: Abstraction has 3329 states and 5236 transitions. [2023-11-19 05:15:09,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:15:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 5236 transitions. [2023-11-19 05:15:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 05:15:09,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:09,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:09,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:09,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:09,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:09,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2122574426, now seen corresponding path program 1 times [2023-11-19 05:15:09,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:09,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708902591] [2023-11-19 05:15:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:09,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 05:15:10,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708902591] [2023-11-19 05:15:10,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708902591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890146019] [2023-11-19 05:15:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:10,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:10,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:15:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:10,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:15:10,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:15:10,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:10,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890146019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:10,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:10,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-19 05:15:10,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217480259] [2023-11-19 05:15:10,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:10,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:15:10,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:10,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:15:10,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:15:10,482 INFO L87 Difference]: Start difference. First operand 3329 states and 5236 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:15:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:11,933 INFO L93 Difference]: Finished difference Result 8508 states and 13836 transitions. [2023-11-19 05:15:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:15:11,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 109 [2023-11-19 05:15:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:11,977 INFO L225 Difference]: With dead ends: 8508 [2023-11-19 05:15:11,978 INFO L226 Difference]: Without dead ends: 5194 [2023-11-19 05:15:11,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:15:12,000 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 649 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 2163 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:12,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 2163 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:15:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2023-11-19 05:15:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 5124. [2023-11-19 05:15:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 3687 states have (on average 1.4890154597233523) internal successors, (5490), 3781 states have internal predecessors, (5490), 1103 states have call successors, (1103), 316 states have call predecessors, (1103), 333 states have return successors, (1471), 1062 states have call predecessors, (1471), 1091 states have call successors, (1471) [2023-11-19 05:15:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 8064 transitions. [2023-11-19 05:15:12,408 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 8064 transitions. Word has length 109 [2023-11-19 05:15:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:12,409 INFO L495 AbstractCegarLoop]: Abstraction has 5124 states and 8064 transitions. [2023-11-19 05:15:12,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:15:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 8064 transitions. [2023-11-19 05:15:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 05:15:12,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:12,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:12,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:12,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:15:12,636 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:12,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash 121064521, now seen corresponding path program 1 times [2023-11-19 05:15:12,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:12,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002743924] [2023-11-19 05:15:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:12,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:15:12,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:12,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002743924] [2023-11-19 05:15:12,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002743924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:12,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744352962] [2023-11-19 05:15:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:12,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:12,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:12,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:12,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:15:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:13,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:15:13,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:15:13,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:13,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744352962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:13,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:13,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-19 05:15:13,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365081558] [2023-11-19 05:15:13,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:13,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:15:13,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:15:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:15:13,402 INFO L87 Difference]: Start difference. First operand 5124 states and 8064 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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) [2023-11-19 05:15:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:13,952 INFO L93 Difference]: Finished difference Result 10409 states and 16704 transitions. [2023-11-19 05:15:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:15:13,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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 110 [2023-11-19 05:15:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:14,011 INFO L225 Difference]: With dead ends: 10409 [2023-11-19 05:15:14,012 INFO L226 Difference]: Without dead ends: 5300 [2023-11-19 05:15:14,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:15:14,040 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 1 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2565 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:14,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2565 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:15:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2023-11-19 05:15:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 5234. [2023-11-19 05:15:14,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 3782 states have (on average 1.4767318878900053) internal successors, (5585), 3851 states have internal predecessors, (5585), 1103 states have call successors, (1103), 316 states have call predecessors, (1103), 348 states have return successors, (1542), 1102 states have call predecessors, (1542), 1091 states have call successors, (1542) [2023-11-19 05:15:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 8230 transitions. [2023-11-19 05:15:14,535 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 8230 transitions. Word has length 110 [2023-11-19 05:15:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:14,536 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 8230 transitions. [2023-11-19 05:15:14,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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) [2023-11-19 05:15:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 8230 transitions. [2023-11-19 05:15:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 05:15:14,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:14,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:14,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 05:15:14,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:14,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:14,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash -694599041, now seen corresponding path program 1 times [2023-11-19 05:15:14,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:14,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087143246] [2023-11-19 05:15:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:14,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:15:15,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087143246] [2023-11-19 05:15:15,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087143246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345803605] [2023-11-19 05:15:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:15,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:15,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:15,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:15:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:15,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:15:15,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 05:15:15,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:15,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345803605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:15,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:15,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-19 05:15:15,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579757444] [2023-11-19 05:15:15,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:15,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:15:15,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:15,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:15:15,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:15:15,606 INFO L87 Difference]: Start difference. First operand 5234 states and 8230 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:15:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:16,977 INFO L93 Difference]: Finished difference Result 11731 states and 18766 transitions. [2023-11-19 05:15:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:15:16,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2023-11-19 05:15:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:17,035 INFO L225 Difference]: With dead ends: 11731 [2023-11-19 05:15:17,036 INFO L226 Difference]: Without dead ends: 6512 [2023-11-19 05:15:17,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:15:17,064 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 778 mSDsluCounter, 2765 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 3602 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:17,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 3602 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:15:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2023-11-19 05:15:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 6384. [2023-11-19 05:15:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 4663 states have (on average 1.4623632854385589) internal successors, (6819), 4754 states have internal predecessors, (6819), 1244 states have call successors, (1244), 417 states have call predecessors, (1244), 476 states have return successors, (2182), 1248 states have call predecessors, (2182), 1224 states have call successors, (2182) [2023-11-19 05:15:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 10245 transitions. [2023-11-19 05:15:17,637 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 10245 transitions. Word has length 110 [2023-11-19 05:15:17,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:17,638 INFO L495 AbstractCegarLoop]: Abstraction has 6384 states and 10245 transitions. [2023-11-19 05:15:17,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:15:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 10245 transitions. [2023-11-19 05:15:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-19 05:15:17,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:17,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:17,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:17,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:17,868 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:17,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:17,868 INFO L85 PathProgramCache]: Analyzing trace with hash 933436238, now seen corresponding path program 1 times [2023-11-19 05:15:17,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:17,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863692485] [2023-11-19 05:15:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:17,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:15:18,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:18,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863692485] [2023-11-19 05:15:18,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863692485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:18,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557916583] [2023-11-19 05:15:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:18,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:18,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:18,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:15:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:18,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:15:18,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:15:18,573 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:18,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557916583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:18,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:18,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-19 05:15:18,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702242524] [2023-11-19 05:15:18,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:18,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:15:18,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:18,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:15:18,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:15:18,576 INFO L87 Difference]: Start difference. First operand 6384 states and 10245 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:15:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:19,378 INFO L93 Difference]: Finished difference Result 13081 states and 21609 transitions. [2023-11-19 05:15:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:15:19,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 112 [2023-11-19 05:15:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:19,437 INFO L225 Difference]: With dead ends: 13081 [2023-11-19 05:15:19,437 INFO L226 Difference]: Without dead ends: 6721 [2023-11-19 05:15:19,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:15:19,496 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 19 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:19,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1769 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:15:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2023-11-19 05:15:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6643. [2023-11-19 05:15:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 4922 states have (on average 1.4713531084924827) internal successors, (7242), 5013 states have internal predecessors, (7242), 1244 states have call successors, (1244), 417 states have call predecessors, (1244), 476 states have return successors, (2182), 1248 states have call predecessors, (2182), 1224 states have call successors, (2182) [2023-11-19 05:15:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 10668 transitions. [2023-11-19 05:15:20,065 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 10668 transitions. Word has length 112 [2023-11-19 05:15:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:20,066 INFO L495 AbstractCegarLoop]: Abstraction has 6643 states and 10668 transitions. [2023-11-19 05:15:20,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:15:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 10668 transitions. [2023-11-19 05:15:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-19 05:15:20,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:20,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:20,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:20,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 05:15:20,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:20,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:20,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1959258084, now seen corresponding path program 1 times [2023-11-19 05:15:20,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:20,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218167549] [2023-11-19 05:15:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:15:20,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218167549] [2023-11-19 05:15:20,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218167549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:20,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173375895] [2023-11-19 05:15:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:20,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:20,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:20,655 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:20,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:15:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:21,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:15:21,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:15:21,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:21,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173375895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:21,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:21,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-19 05:15:21,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135804726] [2023-11-19 05:15:21,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:21,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:15:21,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:15:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:15:21,090 INFO L87 Difference]: Start difference. First operand 6643 states and 10668 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:15:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:22,779 INFO L93 Difference]: Finished difference Result 16700 states and 28678 transitions. [2023-11-19 05:15:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:15:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 114 [2023-11-19 05:15:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:22,867 INFO L225 Difference]: With dead ends: 16700 [2023-11-19 05:15:22,867 INFO L226 Difference]: Without dead ends: 11368 [2023-11-19 05:15:22,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:15:22,999 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 670 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 2061 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:23,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 2061 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:15:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11368 states. [2023-11-19 05:15:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11368 to 11132. [2023-11-19 05:15:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11132 states, 8262 states have (on average 1.4663519728879206) internal successors, (12115), 8409 states have internal predecessors, (12115), 2071 states have call successors, (2071), 703 states have call predecessors, (2071), 798 states have return successors, (4480), 2079 states have call predecessors, (4480), 2038 states have call successors, (4480) [2023-11-19 05:15:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 18666 transitions. [2023-11-19 05:15:23,913 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 18666 transitions. Word has length 114 [2023-11-19 05:15:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:23,915 INFO L495 AbstractCegarLoop]: Abstraction has 11132 states and 18666 transitions. [2023-11-19 05:15:23,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:15:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 18666 transitions. [2023-11-19 05:15:23,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-19 05:15:23,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:23,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:23,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:24,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:15:24,148 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:24,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:24,149 INFO L85 PathProgramCache]: Analyzing trace with hash -306047026, now seen corresponding path program 1 times [2023-11-19 05:15:24,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:24,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769600305] [2023-11-19 05:15:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:24,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:15:24,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:24,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769600305] [2023-11-19 05:15:24,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769600305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:24,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624770744] [2023-11-19 05:15:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:24,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:24,438 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:24,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:15:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:24,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:15:24,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:15:24,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:24,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624770744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:24,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:24,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-19 05:15:24,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572753107] [2023-11-19 05:15:24,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:24,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:15:24,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:24,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:15:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:15:24,830 INFO L87 Difference]: Start difference. First operand 11132 states and 18666 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:15:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:25,853 INFO L93 Difference]: Finished difference Result 22544 states and 39469 transitions. [2023-11-19 05:15:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:15:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 114 [2023-11-19 05:15:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:25,929 INFO L225 Difference]: With dead ends: 22544 [2023-11-19 05:15:25,929 INFO L226 Difference]: Without dead ends: 11436 [2023-11-19 05:15:26,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:15:26,047 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 4 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:26,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1903 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:15:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11436 states. [2023-11-19 05:15:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11436 to 11178. [2023-11-19 05:15:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11178 states, 8308 states have (on average 1.4534183919114108) internal successors, (12075), 8455 states have internal predecessors, (12075), 2071 states have call successors, (2071), 703 states have call predecessors, (2071), 798 states have return successors, (4480), 2079 states have call predecessors, (4480), 2038 states have call successors, (4480) [2023-11-19 05:15:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11178 states to 11178 states and 18626 transitions. [2023-11-19 05:15:27,118 INFO L78 Accepts]: Start accepts. Automaton has 11178 states and 18626 transitions. Word has length 114 [2023-11-19 05:15:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:27,118 INFO L495 AbstractCegarLoop]: Abstraction has 11178 states and 18626 transitions. [2023-11-19 05:15:27,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:15:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 11178 states and 18626 transitions. [2023-11-19 05:15:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-19 05:15:27,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:27,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:27,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:27,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:15:27,348 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:27,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2036978167, now seen corresponding path program 1 times [2023-11-19 05:15:27,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:27,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402134857] [2023-11-19 05:15:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:27,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:15:27,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:27,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402134857] [2023-11-19 05:15:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402134857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142402460] [2023-11-19 05:15:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:27,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:27,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:27,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:27,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:15:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:27,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:15:27,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:15:28,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:28,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142402460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:28,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:28,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-19 05:15:28,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244622739] [2023-11-19 05:15:28,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:28,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:15:28,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:28,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:15:28,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:15:28,058 INFO L87 Difference]: Start difference. First operand 11178 states and 18626 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:15:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:30,285 INFO L93 Difference]: Finished difference Result 25707 states and 45200 transitions. [2023-11-19 05:15:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:15:30,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 115 [2023-11-19 05:15:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:30,409 INFO L225 Difference]: With dead ends: 25707 [2023-11-19 05:15:30,410 INFO L226 Difference]: Without dead ends: 15867 [2023-11-19 05:15:30,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:15:30,523 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 672 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 2243 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:30,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 2243 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:15:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15867 states. [2023-11-19 05:15:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15867 to 15657. [2023-11-19 05:15:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15657 states, 11638 states have (on average 1.4512802887094003) internal successors, (16890), 11841 states have internal predecessors, (16890), 2898 states have call successors, (2898), 989 states have call predecessors, (2898), 1120 states have return successors, (7365), 2910 states have call predecessors, (7365), 2852 states have call successors, (7365) [2023-11-19 05:15:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15657 states to 15657 states and 27153 transitions. [2023-11-19 05:15:31,954 INFO L78 Accepts]: Start accepts. Automaton has 15657 states and 27153 transitions. Word has length 115 [2023-11-19 05:15:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:31,955 INFO L495 AbstractCegarLoop]: Abstraction has 15657 states and 27153 transitions. [2023-11-19 05:15:31,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:15:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 15657 states and 27153 transitions. [2023-11-19 05:15:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-19 05:15:31,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:31,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:31,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:32,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedb20d8-cbf9-46e4-9ce4-512bf6ba832d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 05:15:32,176 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:32,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1245607034, now seen corresponding path program 1 times [2023-11-19 05:15:32,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:32,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110843600] [2023-11-19 05:15:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:32,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat