./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c63ca5a13217ab3c82769d6ebc8e69dd180f3b7d25df235b9ae7098d5fa1543b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:29:49,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:29:49,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:29:49,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:29:49,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:29:49,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:29:49,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:29:49,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:29:49,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:29:49,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:29:49,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:29:49,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:29:49,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:29:49,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:29:49,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:29:49,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:29:49,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:29:49,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:29:49,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:29:49,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:29:49,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:29:49,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:29:49,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:29:49,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:29:49,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:29:49,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:29:49,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:29:49,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:29:49,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:29:49,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:29:49,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:29:49,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:29:49,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:29:49,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:29:49,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:29:49,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:29:49,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:29:49,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:29:49,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:29:49,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:29:49,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:29:49,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 07:29:49,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:29:49,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:29:49,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:29:49,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:29:49,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:29:49,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:29:49,969 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:29:49,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:29:49,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:29:49,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:29:49,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:29:49,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:29:49,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:29:49,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:29:49,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:29:49,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:29:49,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:29:49,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:29:49,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:29:49,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:29:49,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:29:49,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:29:49,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:29:49,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:29:49,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:29:49,974 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:29:49,974 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:29:49,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:29:49,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:29:49,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c63ca5a13217ab3c82769d6ebc8e69dd180f3b7d25df235b9ae7098d5fa1543b [2021-11-07 07:29:50,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:29:50,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:29:50,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:29:50,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:29:50,252 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:29:50,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i [2021-11-07 07:29:50,329 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/data/9ba49822c/e53792f67ad4405982c76a900f9c81b9/FLAGc2bbebf67 [2021-11-07 07:29:51,170 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:29:51,171 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i [2021-11-07 07:29:51,212 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/data/9ba49822c/e53792f67ad4405982c76a900f9c81b9/FLAGc2bbebf67 [2021-11-07 07:29:51,665 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/data/9ba49822c/e53792f67ad4405982c76a900f9c81b9 [2021-11-07 07:29:51,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:29:51,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:29:51,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:29:51,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:29:51,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:29:51,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:51" (1/1) ... [2021-11-07 07:29:51,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36159f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51, skipping insertion in model container [2021-11-07 07:29:51,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:51" (1/1) ... [2021-11-07 07:29:51,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:29:51,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:29:53,770 WARN L228 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_366a78fd-d6b2-4965-bee7-c88c55611a47/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i[198983,198996] [2021-11-07 07:29:53,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:29:53,861 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:29:54,228 WARN L228 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_366a78fd-d6b2-4965-bee7-c88c55611a47/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i[198983,198996] [2021-11-07 07:29:54,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:29:54,431 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:29:54,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54 WrapperNode [2021-11-07 07:29:54,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:29:54,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:29:54,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:29:54,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:29:54,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:54,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:54,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:29:54,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:29:54,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:29:54,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:29:54,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:54,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:55,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:55,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:55,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:55,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:55,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:55,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:29:55,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:29:55,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:29:55,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:29:55,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (1/1) ... [2021-11-07 07:29:55,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:29:55,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:55,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:29:55,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:29:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-07 07:29:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-07 07:29:55,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-07 07:29:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-07 07:29:55,666 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-07 07:29:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_compat_ioctl [2021-11-07 07:29:55,666 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_compat_ioctl [2021-11-07 07:29:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 07:29:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 07:29:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_read [2021-11-07 07:29:55,667 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_read [2021-11-07 07:29:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure __vfio_group_unset_container [2021-11-07 07:29:55,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __vfio_group_unset_container [2021-11-07 07:29:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_compat_ioctl [2021-11-07 07:29:55,667 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_compat_ioctl [2021-11-07 07:29:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_mmap [2021-11-07 07:29:55,668 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_mmap [2021-11-07 07:29:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_put [2021-11-07 07:29:55,668 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_put [2021-11-07 07:29:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_try_dissolve_container [2021-11-07 07:29:55,668 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_try_dissolve_container [2021-11-07 07:29:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:29:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_write [2021-11-07 07:29:55,669 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_write [2021-11-07 07:29:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:29:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_unl_ioctl [2021-11-07 07:29:55,669 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_unl_ioctl [2021-11-07 07:29:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-07 07:29:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-07 07:29:55,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-07 07:29:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:29:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 07:29:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 07:29:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 07:29:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_put [2021-11-07 07:29:55,671 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_put [2021-11-07 07:29:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put_mutex [2021-11-07 07:29:55,671 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put_mutex [2021-11-07 07:29:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:29:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_put_external_user [2021-11-07 07:29:55,672 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_put_external_user [2021-11-07 07:29:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_read [2021-11-07 07:29:55,672 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_read [2021-11-07 07:29:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:29:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_unl_ioctl [2021-11-07 07:29:55,672 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_unl_ioctl [2021-11-07 07:29:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-07 07:29:55,673 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-07 07:29:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:29:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_mmap [2021-11-07 07:29:55,674 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_mmap [2021-11-07 07:29:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:29:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 07:29:55,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 07:29:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_write [2021-11-07 07:29:55,674 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_write [2021-11-07 07:29:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_ioctl_check_extension [2021-11-07 07:29:55,675 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_ioctl_check_extension [2021-11-07 07:29:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_container_put [2021-11-07 07:29:55,676 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_container_put [2021-11-07 07:29:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-07 07:29:55,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-07 07:29:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:29:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_ioctl_set_iommu [2021-11-07 07:29:55,679 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_ioctl_set_iommu [2021-11-07 07:29:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:29:55,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:30:05,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:30:05,112 INFO L299 CfgBuilder]: Removed 1580 assume(true) statements. [2021-11-07 07:30:05,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:30:05 BoogieIcfgContainer [2021-11-07 07:30:05,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:30:05,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:30:05,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:30:05,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:30:05,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:29:51" (1/3) ... [2021-11-07 07:30:05,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a46b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:30:05, skipping insertion in model container [2021-11-07 07:30:05,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:54" (2/3) ... [2021-11-07 07:30:05,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a46b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:30:05, skipping insertion in model container [2021-11-07 07:30:05,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:30:05" (3/3) ... [2021-11-07 07:30:05,127 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i [2021-11-07 07:30:05,133 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:30:05,133 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 07:30:05,203 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:30:05,210 INFO L339 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:30:05,210 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 07:30:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 1760 states, 1640 states have (on average 1.3719512195121952) internal successors, (2250), 1649 states have internal predecessors, (2250), 88 states have call successors, (88), 25 states have call predecessors, (88), 25 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-07 07:30:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:30:05,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:05,298 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:05,298 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash -498588482, now seen corresponding path program 1 times [2021-11-07 07:30:05,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:05,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26076135] [2021-11-07 07:30:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:05,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:30:06,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:06,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26076135] [2021-11-07 07:30:06,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26076135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:06,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:06,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:30:06,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59296873] [2021-11-07 07:30:06,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:30:06,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:30:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:30:06,126 INFO L87 Difference]: Start difference. First operand has 1760 states, 1640 states have (on average 1.3719512195121952) internal successors, (2250), 1649 states have internal predecessors, (2250), 88 states have call successors, (88), 25 states have call predecessors, (88), 25 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 2 states, 2 states have (on average 56.0) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:06,415 INFO L93 Difference]: Finished difference Result 3516 states and 4921 transitions. [2021-11-07 07:30:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:30:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 56.0) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 07:30:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:06,471 INFO L225 Difference]: With dead ends: 3516 [2021-11-07 07:30:06,471 INFO L226 Difference]: Without dead ends: 1751 [2021-11-07 07:30:06,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:30:06,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-11-07 07:30:06,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1751. [2021-11-07 07:30:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1632 states have (on average 1.3370098039215685) internal successors, (2182), 1640 states have internal predecessors, (2182), 88 states have call successors, (88), 25 states have call predecessors, (88), 25 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-07 07:30:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2358 transitions. [2021-11-07 07:30:06,691 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2358 transitions. Word has length 112 [2021-11-07 07:30:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:06,695 INFO L470 AbstractCegarLoop]: Abstraction has 1751 states and 2358 transitions. [2021-11-07 07:30:06,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 56.0) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2358 transitions. [2021-11-07 07:30:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:30:06,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:06,707 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:06,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:30:06,707 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash 450589650, now seen corresponding path program 1 times [2021-11-07 07:30:06,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:06,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949492685] [2021-11-07 07:30:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:06,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:30:07,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:07,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949492685] [2021-11-07 07:30:07,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949492685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:07,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:07,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:30:07,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728819077] [2021-11-07 07:30:07,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:30:07,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:30:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:30:07,235 INFO L87 Difference]: Start difference. First operand 1751 states and 2358 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:09,437 INFO L93 Difference]: Finished difference Result 5000 states and 6783 transitions. [2021-11-07 07:30:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:30:09,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 07:30:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:09,475 INFO L225 Difference]: With dead ends: 5000 [2021-11-07 07:30:09,476 INFO L226 Difference]: Without dead ends: 3340 [2021-11-07 07:30:09,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:30:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-11-07 07:30:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 3330. [2021-11-07 07:30:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3098 states have (on average 1.3466752743705617) internal successors, (4172), 3109 states have internal predecessors, (4172), 176 states have call successors, (176), 50 states have call predecessors, (176), 50 states have return successors, (176), 174 states have call predecessors, (176), 176 states have call successors, (176) [2021-11-07 07:30:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 4524 transitions. [2021-11-07 07:30:09,671 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 4524 transitions. Word has length 112 [2021-11-07 07:30:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:09,672 INFO L470 AbstractCegarLoop]: Abstraction has 3330 states and 4524 transitions. [2021-11-07 07:30:09,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:09,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 4524 transitions. [2021-11-07 07:30:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 07:30:09,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:09,681 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:09,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:30:09,681 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash -367720122, now seen corresponding path program 1 times [2021-11-07 07:30:09,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:09,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97662168] [2021-11-07 07:30:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:09,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:30:10,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:10,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97662168] [2021-11-07 07:30:10,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97662168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:10,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:10,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:30:10,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344930816] [2021-11-07 07:30:10,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:30:10,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:10,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:30:10,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:30:10,023 INFO L87 Difference]: Start difference. First operand 3330 states and 4524 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:10,240 INFO L93 Difference]: Finished difference Result 3336 states and 4528 transitions. [2021-11-07 07:30:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:30:10,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 07:30:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:10,270 INFO L225 Difference]: With dead ends: 3336 [2021-11-07 07:30:10,271 INFO L226 Difference]: Without dead ends: 3333 [2021-11-07 07:30:10,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:30:10,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-11-07 07:30:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3330. [2021-11-07 07:30:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3098 states have (on average 1.3463524854744997) internal successors, (4171), 3109 states have internal predecessors, (4171), 176 states have call successors, (176), 50 states have call predecessors, (176), 50 states have return successors, (176), 174 states have call predecessors, (176), 176 states have call successors, (176) [2021-11-07 07:30:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 4523 transitions. [2021-11-07 07:30:10,464 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 4523 transitions. Word has length 121 [2021-11-07 07:30:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:10,465 INFO L470 AbstractCegarLoop]: Abstraction has 3330 states and 4523 transitions. [2021-11-07 07:30:10,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 4523 transitions. [2021-11-07 07:30:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 07:30:10,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:10,474 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:10,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:30:10,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash -367660540, now seen corresponding path program 1 times [2021-11-07 07:30:10,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:10,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209404472] [2021-11-07 07:30:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:10,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:30:10,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:10,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209404472] [2021-11-07 07:30:10,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209404472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:10,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:10,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:30:10,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456599338] [2021-11-07 07:30:10,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:30:10,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:10,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:30:10,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:30:10,930 INFO L87 Difference]: Start difference. First operand 3330 states and 4523 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:11,286 INFO L93 Difference]: Finished difference Result 9796 states and 13526 transitions. [2021-11-07 07:30:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:30:11,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 07:30:11,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:11,367 INFO L225 Difference]: With dead ends: 9796 [2021-11-07 07:30:11,367 INFO L226 Difference]: Without dead ends: 6543 [2021-11-07 07:30:11,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:30:11,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6543 states. [2021-11-07 07:30:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6543 to 6528. [2021-11-07 07:30:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6528 states, 6070 states have (on average 1.3487644151565075) internal successors, (8187), 6087 states have internal predecessors, (8187), 352 states have call successors, (352), 100 states have call predecessors, (352), 100 states have return successors, (386), 348 states have call predecessors, (386), 352 states have call successors, (386) [2021-11-07 07:30:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6528 states to 6528 states and 8925 transitions. [2021-11-07 07:30:11,867 INFO L78 Accepts]: Start accepts. Automaton has 6528 states and 8925 transitions. Word has length 121 [2021-11-07 07:30:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:11,869 INFO L470 AbstractCegarLoop]: Abstraction has 6528 states and 8925 transitions. [2021-11-07 07:30:11,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 6528 states and 8925 transitions. [2021-11-07 07:30:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 07:30:11,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:11,885 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:11,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:30:11,886 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:11,887 INFO L85 PathProgramCache]: Analyzing trace with hash 241739091, now seen corresponding path program 1 times [2021-11-07 07:30:11,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:11,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251064351] [2021-11-07 07:30:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:11,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:12,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-07 07:30:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:30:12,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:12,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251064351] [2021-11-07 07:30:12,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251064351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:12,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:12,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:30:12,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856570777] [2021-11-07 07:30:12,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:12,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:12,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:12,235 INFO L87 Difference]: Start difference. First operand 6528 states and 8925 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:16,688 INFO L93 Difference]: Finished difference Result 11517 states and 15835 transitions. [2021-11-07 07:30:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:30:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-11-07 07:30:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:16,760 INFO L225 Difference]: With dead ends: 11517 [2021-11-07 07:30:16,760 INFO L226 Difference]: Without dead ends: 5080 [2021-11-07 07:30:16,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:30:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2021-11-07 07:30:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 4732. [2021-11-07 07:30:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 4274 states have (on average 1.3329433785680862) internal successors, (5697), 4279 states have internal predecessors, (5697), 320 states have call successors, (320), 100 states have call predecessors, (320), 132 states have return successors, (478), 360 states have call predecessors, (478), 320 states have call successors, (478) [2021-11-07 07:30:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 6495 transitions. [2021-11-07 07:30:17,360 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 6495 transitions. Word has length 130 [2021-11-07 07:30:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:17,360 INFO L470 AbstractCegarLoop]: Abstraction has 4732 states and 6495 transitions. [2021-11-07 07:30:17,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 6495 transitions. [2021-11-07 07:30:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 07:30:17,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:17,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:17,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:30:17,371 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:17,372 INFO L85 PathProgramCache]: Analyzing trace with hash -429575721, now seen corresponding path program 1 times [2021-11-07 07:30:17,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:17,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539394365] [2021-11-07 07:30:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:17,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:17,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-07 07:30:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:30:17,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:17,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539394365] [2021-11-07 07:30:17,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539394365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:17,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:17,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:30:17,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050736721] [2021-11-07 07:30:17,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:17,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:17,703 INFO L87 Difference]: Start difference. First operand 4732 states and 6495 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:22,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:22,709 INFO L93 Difference]: Finished difference Result 14448 states and 19895 transitions. [2021-11-07 07:30:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:30:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-11-07 07:30:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:22,809 INFO L225 Difference]: With dead ends: 14448 [2021-11-07 07:30:22,809 INFO L226 Difference]: Without dead ends: 9807 [2021-11-07 07:30:22,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:30:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9807 states. [2021-11-07 07:30:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9807 to 9070. [2021-11-07 07:30:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9070 states, 8200 states have (on average 1.335) internal successors, (10947), 8205 states have internal predecessors, (10947), 600 states have call successors, (600), 200 states have call predecessors, (600), 264 states have return successors, (898), 680 states have call predecessors, (898), 600 states have call successors, (898) [2021-11-07 07:30:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9070 states to 9070 states and 12445 transitions. [2021-11-07 07:30:23,414 INFO L78 Accepts]: Start accepts. Automaton has 9070 states and 12445 transitions. Word has length 140 [2021-11-07 07:30:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:23,415 INFO L470 AbstractCegarLoop]: Abstraction has 9070 states and 12445 transitions. [2021-11-07 07:30:23,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 9070 states and 12445 transitions. [2021-11-07 07:30:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 07:30:23,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:23,423 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:23,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:30:23,423 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1698876181, now seen corresponding path program 1 times [2021-11-07 07:30:23,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:23,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221818693] [2021-11-07 07:30:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:23,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:23,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-07 07:30:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:23,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:30:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:23,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:30:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:30:23,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:23,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221818693] [2021-11-07 07:30:23,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221818693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:23,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:23,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:30:23,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373356870] [2021-11-07 07:30:23,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:23,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:23,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:23,712 INFO L87 Difference]: Start difference. First operand 9070 states and 12445 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:30:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:27,639 INFO L93 Difference]: Finished difference Result 13925 states and 19121 transitions. [2021-11-07 07:30:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:30:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2021-11-07 07:30:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:27,671 INFO L225 Difference]: With dead ends: 13925 [2021-11-07 07:30:27,671 INFO L226 Difference]: Without dead ends: 4946 [2021-11-07 07:30:27,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:30:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2021-11-07 07:30:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4598. [2021-11-07 07:30:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4172 states have (on average 1.3295781399808246) internal successors, (5547), 4177 states have internal predecessors, (5547), 288 states have call successors, (288), 100 states have call predecessors, (288), 132 states have return successors, (434), 328 states have call predecessors, (434), 288 states have call successors, (434) [2021-11-07 07:30:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 6269 transitions. [2021-11-07 07:30:27,948 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 6269 transitions. Word has length 145 [2021-11-07 07:30:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:27,948 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 6269 transitions. [2021-11-07 07:30:27,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:30:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 6269 transitions. [2021-11-07 07:30:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 07:30:27,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:27,960 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:27,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:30:27,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash -36557693, now seen corresponding path program 1 times [2021-11-07 07:30:27,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:27,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730194864] [2021-11-07 07:30:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:27,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:28,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-07 07:30:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:30:28,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:28,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730194864] [2021-11-07 07:30:28,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730194864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:28,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:28,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:30:28,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163627595] [2021-11-07 07:30:28,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:28,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:28,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:28,244 INFO L87 Difference]: Start difference. First operand 4598 states and 6269 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:34,701 INFO L93 Difference]: Finished difference Result 11412 states and 15606 transitions. [2021-11-07 07:30:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:30:34,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2021-11-07 07:30:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:34,744 INFO L225 Difference]: With dead ends: 11412 [2021-11-07 07:30:34,744 INFO L226 Difference]: Without dead ends: 6905 [2021-11-07 07:30:34,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:30:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6905 states. [2021-11-07 07:30:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6905 to 6308. [2021-11-07 07:30:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6308 states, 5670 states have (on average 1.3326278659611992) internal successors, (7556), 5687 states have internal predecessors, (7556), 428 states have call successors, (428), 172 states have call predecessors, (428), 204 states have return successors, (572), 464 states have call predecessors, (572), 428 states have call successors, (572) [2021-11-07 07:30:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6308 states to 6308 states and 8556 transitions. [2021-11-07 07:30:35,103 INFO L78 Accepts]: Start accepts. Automaton has 6308 states and 8556 transitions. Word has length 168 [2021-11-07 07:30:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:35,103 INFO L470 AbstractCegarLoop]: Abstraction has 6308 states and 8556 transitions. [2021-11-07 07:30:35,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6308 states and 8556 transitions. [2021-11-07 07:30:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-07 07:30:35,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:35,113 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:35,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:30:35,114 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:35,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:35,114 INFO L85 PathProgramCache]: Analyzing trace with hash -345203021, now seen corresponding path program 1 times [2021-11-07 07:30:35,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:35,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358256307] [2021-11-07 07:30:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:35,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-07 07:30:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:30:35,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:35,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358256307] [2021-11-07 07:30:35,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358256307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:35,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:35,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:30:35,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266275074] [2021-11-07 07:30:35,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:35,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:35,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:35,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:35,457 INFO L87 Difference]: Start difference. First operand 6308 states and 8556 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:39,476 INFO L93 Difference]: Finished difference Result 13141 states and 18331 transitions. [2021-11-07 07:30:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:30:39,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-11-07 07:30:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:39,521 INFO L225 Difference]: With dead ends: 13141 [2021-11-07 07:30:39,521 INFO L226 Difference]: Without dead ends: 6924 [2021-11-07 07:30:39,550 INFO L786 BasicCegarLoop]: 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 [2021-11-07 07:30:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6924 states. [2021-11-07 07:30:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6924 to 6324. [2021-11-07 07:30:39,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 5686 states have (on average 1.3316918747801618) internal successors, (7572), 5703 states have internal predecessors, (7572), 428 states have call successors, (428), 172 states have call predecessors, (428), 204 states have return successors, (572), 464 states have call predecessors, (572), 428 states have call successors, (572) [2021-11-07 07:30:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 8572 transitions. [2021-11-07 07:30:39,931 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 8572 transitions. Word has length 163 [2021-11-07 07:30:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:39,931 INFO L470 AbstractCegarLoop]: Abstraction has 6324 states and 8572 transitions. [2021-11-07 07:30:39,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 8572 transitions. [2021-11-07 07:30:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 07:30:39,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:39,944 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:39,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:30:39,945 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1039951095, now seen corresponding path program 1 times [2021-11-07 07:30:39,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:39,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894053385] [2021-11-07 07:30:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:39,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:40,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-07 07:30:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:30:40,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:40,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894053385] [2021-11-07 07:30:40,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894053385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:40,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:40,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:30:40,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178067694] [2021-11-07 07:30:40,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:40,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:40,877 INFO L87 Difference]: Start difference. First operand 6324 states and 8572 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:44,747 INFO L93 Difference]: Finished difference Result 13178 states and 17931 transitions. [2021-11-07 07:30:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:30:44,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2021-11-07 07:30:44,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:44,794 INFO L225 Difference]: With dead ends: 13178 [2021-11-07 07:30:44,794 INFO L226 Difference]: Without dead ends: 6898 [2021-11-07 07:30:44,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6898 states. [2021-11-07 07:30:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6898 to 6330. [2021-11-07 07:30:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6330 states, 5692 states have (on average 1.33134223471539) internal successors, (7578), 5709 states have internal predecessors, (7578), 428 states have call successors, (428), 172 states have call predecessors, (428), 204 states have return successors, (572), 464 states have call predecessors, (572), 428 states have call successors, (572) [2021-11-07 07:30:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6330 states to 6330 states and 8578 transitions. [2021-11-07 07:30:45,172 INFO L78 Accepts]: Start accepts. Automaton has 6330 states and 8578 transitions. Word has length 164 [2021-11-07 07:30:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:45,173 INFO L470 AbstractCegarLoop]: Abstraction has 6330 states and 8578 transitions. [2021-11-07 07:30:45,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6330 states and 8578 transitions. [2021-11-07 07:30:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 07:30:45,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:45,184 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:45,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:30:45,185 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:45,185 INFO L85 PathProgramCache]: Analyzing trace with hash -57092633, now seen corresponding path program 1 times [2021-11-07 07:30:45,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:45,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354756719] [2021-11-07 07:30:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:45,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:46,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-07 07:30:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:30:46,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:46,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354756719] [2021-11-07 07:30:46,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354756719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:30:46,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733813440] [2021-11-07 07:30:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:46,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:30:46,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:30:46,585 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:30:46,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:30:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 3547 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:30:47,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:30:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:30:48,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733813440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:48,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:30:48,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-07 07:30:48,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915653294] [2021-11-07 07:30:48,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:48,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:48,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:30:48,477 INFO L87 Difference]: Start difference. First operand 6330 states and 8578 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:50,924 INFO L93 Difference]: Finished difference Result 9554 states and 12938 transitions. [2021-11-07 07:30:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:30:50,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-11-07 07:30:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:50,941 INFO L225 Difference]: With dead ends: 9554 [2021-11-07 07:30:50,941 INFO L226 Difference]: Without dead ends: 3316 [2021-11-07 07:30:50,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:30:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-11-07 07:30:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 3308. [2021-11-07 07:30:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 2986 states have (on average 1.3241795043536504) internal successors, (3954), 2997 states have internal predecessors, (3954), 214 states have call successors, (214), 86 states have call predecessors, (214), 102 states have return successors, (286), 232 states have call predecessors, (286), 214 states have call successors, (286) [2021-11-07 07:30:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 4454 transitions. [2021-11-07 07:30:51,219 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 4454 transitions. Word has length 170 [2021-11-07 07:30:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:51,220 INFO L470 AbstractCegarLoop]: Abstraction has 3308 states and 4454 transitions. [2021-11-07 07:30:51,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 4454 transitions. [2021-11-07 07:30:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 07:30:51,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:51,228 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:51,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:30:51,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:30:51,455 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash -723847393, now seen corresponding path program 1 times [2021-11-07 07:30:51,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:51,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906888092] [2021-11-07 07:30:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:51,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:53,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-07 07:30:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:30:53,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:53,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906888092] [2021-11-07 07:30:53,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906888092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:30:53,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834503245] [2021-11-07 07:30:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:53,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:30:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:30:53,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:30:53,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:30:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 3815 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:30:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:30:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 07:30:55,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834503245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:55,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:30:55,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-11-07 07:30:55,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71323315] [2021-11-07 07:30:55,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:30:55,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:30:55,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:30:55,445 INFO L87 Difference]: Start difference. First operand 3308 states and 4454 transitions. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:55,863 INFO L93 Difference]: Finished difference Result 6526 states and 9003 transitions. [2021-11-07 07:30:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:30:55,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2021-11-07 07:30:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:55,882 INFO L225 Difference]: With dead ends: 6526 [2021-11-07 07:30:55,882 INFO L226 Difference]: Without dead ends: 3332 [2021-11-07 07:30:55,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:30:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-11-07 07:30:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 3320. [2021-11-07 07:30:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 2998 states have (on average 1.3228819212808538) internal successors, (3966), 3009 states have internal predecessors, (3966), 214 states have call successors, (214), 86 states have call predecessors, (214), 102 states have return successors, (286), 232 states have call predecessors, (286), 214 states have call successors, (286) [2021-11-07 07:30:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 4466 transitions. [2021-11-07 07:30:56,085 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 4466 transitions. Word has length 190 [2021-11-07 07:30:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:56,086 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 4466 transitions. [2021-11-07 07:30:56,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:30:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 4466 transitions. [2021-11-07 07:30:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-07 07:30:56,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:56,095 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:30:56,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:30:56,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:30:56,311 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:30:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1390058566, now seen corresponding path program 1 times [2021-11-07 07:30:56,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:56,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410308697] [2021-11-07 07:30:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:56,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:56,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-07 07:30:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:56,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 07:30:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:56,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-07 07:30:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:56,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-07 07:30:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:56,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-07 07:30:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 07:30:56,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:56,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410308697] [2021-11-07 07:30:56,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410308697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:56,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:56,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:30:56,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177754193] [2021-11-07 07:30:56,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:56,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:56,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:56,730 INFO L87 Difference]: Start difference. First operand 3320 states and 4466 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:31:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:31:00,672 INFO L93 Difference]: Finished difference Result 6820 states and 9480 transitions. [2021-11-07 07:31:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:31:00,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 236 [2021-11-07 07:31:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:31:00,692 INFO L225 Difference]: With dead ends: 6820 [2021-11-07 07:31:00,693 INFO L226 Difference]: Without dead ends: 3614 [2021-11-07 07:31:00,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:31:00,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3614 states. [2021-11-07 07:31:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3614 to 3320. [2021-11-07 07:31:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 2998 states have (on average 1.3188792528352236) internal successors, (3954), 3009 states have internal predecessors, (3954), 214 states have call successors, (214), 86 states have call predecessors, (214), 102 states have return successors, (286), 232 states have call predecessors, (286), 214 states have call successors, (286) [2021-11-07 07:31:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 4454 transitions. [2021-11-07 07:31:00,910 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 4454 transitions. Word has length 236 [2021-11-07 07:31:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:31:00,911 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 4454 transitions. [2021-11-07 07:31:00,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:31:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 4454 transitions. [2021-11-07 07:31:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-07 07:31:00,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:31:00,920 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:31:00,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:31:00,921 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:31:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:31:00,922 INFO L85 PathProgramCache]: Analyzing trace with hash 833375839, now seen corresponding path program 1 times [2021-11-07 07:31:00,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:31:00,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024696284] [2021-11-07 07:31:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:31:00,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:31:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:31:02,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-11-07 07:31:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:31:02,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 07:31:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:31:02,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-07 07:31:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:31:02,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-07 07:31:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:31:02,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-07 07:31:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:31:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 07:31:02,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:31:02,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024696284] [2021-11-07 07:31:02,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024696284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:31:02,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665824981] [2021-11-07 07:31:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:31:02,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:31:02,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:31:02,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:31:02,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:31:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:31:04,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 4215 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:31:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:31:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 07:31:05,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665824981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:31:05,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:31:05,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2021-11-07 07:31:05,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662263397] [2021-11-07 07:31:05,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:31:05,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:31:05,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:31:05,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:31:05,473 INFO L87 Difference]: Start difference. First operand 3320 states and 4454 transitions. Second operand has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 1 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-07 07:31:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:31:06,128 INFO L93 Difference]: Finished difference Result 6585 states and 9096 transitions. [2021-11-07 07:31:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:31:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 1 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 238 [2021-11-07 07:31:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:31:06,149 INFO L225 Difference]: With dead ends: 6585 [2021-11-07 07:31:06,150 INFO L226 Difference]: Without dead ends: 3379 [2021-11-07 07:31:06,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:31:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2021-11-07 07:31:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 3340. [2021-11-07 07:31:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3018 states have (on average 1.3167660702451955) internal successors, (3974), 3029 states have internal predecessors, (3974), 214 states have call successors, (214), 86 states have call predecessors, (214), 102 states have return successors, (286), 232 states have call predecessors, (286), 214 states have call successors, (286) [2021-11-07 07:31:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 4474 transitions. [2021-11-07 07:31:06,386 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 4474 transitions. Word has length 238 [2021-11-07 07:31:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:31:06,387 INFO L470 AbstractCegarLoop]: Abstraction has 3340 states and 4474 transitions. [2021-11-07 07:31:06,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 1 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-07 07:31:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 4474 transitions. [2021-11-07 07:31:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-07 07:31:06,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:31:06,396 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:31:06,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:31:06,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:31:06,611 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:31:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:31:06,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1759542397, now seen corresponding path program 1 times [2021-11-07 07:31:06,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:31:06,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453111015] [2021-11-07 07:31:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:31:06,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:31:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:31:09,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-11-07 07:31:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:31:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:31:09,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:31:09,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453111015] [2021-11-07 07:31:09,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453111015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:31:09,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826940844] [2021-11-07 07:31:09,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:31:09,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:31:09,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:31:09,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:31:09,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:32:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:32:18,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 3867 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:32:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:32:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:32:19,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826940844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:32:19,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:32:19,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 07:32:19,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428493875] [2021-11-07 07:32:19,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:32:19,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:32:19,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:32:19,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:32:19,605 INFO L87 Difference]: Start difference. First operand 3340 states and 4474 transitions. Second operand has 8 states, 8 states have (on average 25.375) internal successors, (203), 7 states have internal predecessors, (203), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:32:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:32:24,449 INFO L93 Difference]: Finished difference Result 6941 states and 9348 transitions. [2021-11-07 07:32:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:32:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 25.375) internal successors, (203), 7 states have internal predecessors, (203), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 197 [2021-11-07 07:32:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:32:24,471 INFO L225 Difference]: With dead ends: 6941 [2021-11-07 07:32:24,471 INFO L226 Difference]: Without dead ends: 3646 [2021-11-07 07:32:24,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:32:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2021-11-07 07:32:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3356. [2021-11-07 07:32:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3034 states have (on average 1.3150955833882663) internal successors, (3990), 3045 states have internal predecessors, (3990), 214 states have call successors, (214), 86 states have call predecessors, (214), 102 states have return successors, (286), 232 states have call predecessors, (286), 214 states have call successors, (286) [2021-11-07 07:32:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 4490 transitions. [2021-11-07 07:32:24,663 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 4490 transitions. Word has length 197 [2021-11-07 07:32:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:32:24,664 INFO L470 AbstractCegarLoop]: Abstraction has 3356 states and 4490 transitions. [2021-11-07 07:32:24,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.375) internal successors, (203), 7 states have internal predecessors, (203), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:32:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 4490 transitions. [2021-11-07 07:32:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-07 07:32:24,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:32:24,672 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:32:24,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:32:24,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:32:24,895 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:32:24,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:32:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1758623679, now seen corresponding path program 1 times [2021-11-07 07:32:24,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:32:24,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577886714] [2021-11-07 07:32:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:32:24,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:32:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:32:27,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-11-07 07:32:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:32:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 07:32:27,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:32:27,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577886714] [2021-11-07 07:32:27,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577886714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:32:27,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402858843] [2021-11-07 07:32:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:32:27,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:32:27,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:32:27,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:32:27,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:32:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:32:51,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 3963 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:32:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:32:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 07:32:51,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402858843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:32:51,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:32:51,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-07 07:32:51,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392659942] [2021-11-07 07:32:51,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:32:51,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:32:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:32:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:32:51,684 INFO L87 Difference]: Start difference. First operand 3356 states and 4490 transitions. Second operand has 9 states, 9 states have (on average 24.0) internal successors, (216), 8 states have internal predecessors, (216), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:32:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:32:56,408 INFO L93 Difference]: Finished difference Result 6972 states and 9379 transitions. [2021-11-07 07:32:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:32:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 24.0) internal successors, (216), 8 states have internal predecessors, (216), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 213 [2021-11-07 07:32:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:32:56,430 INFO L225 Difference]: With dead ends: 6972 [2021-11-07 07:32:56,430 INFO L226 Difference]: Without dead ends: 3662 [2021-11-07 07:32:56,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:32:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2021-11-07 07:32:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3372. [2021-11-07 07:32:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3050 states have (on average 1.3134426229508196) internal successors, (4006), 3061 states have internal predecessors, (4006), 214 states have call successors, (214), 86 states have call predecessors, (214), 102 states have return successors, (286), 232 states have call predecessors, (286), 214 states have call successors, (286) [2021-11-07 07:32:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 4506 transitions. [2021-11-07 07:32:56,731 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 4506 transitions. Word has length 213 [2021-11-07 07:32:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:32:56,732 INFO L470 AbstractCegarLoop]: Abstraction has 3372 states and 4506 transitions. [2021-11-07 07:32:56,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.0) internal successors, (216), 8 states have internal predecessors, (216), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:32:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 4506 transitions. [2021-11-07 07:32:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-07 07:32:56,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:32:56,742 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:32:56,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:32:56,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:32:56,955 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:32:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:32:56,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1224597251, now seen corresponding path program 2 times [2021-11-07 07:32:56,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:32:56,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359094284] [2021-11-07 07:32:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:32:56,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:32:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:32:59,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-11-07 07:32:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:32:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-07 07:32:59,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:32:59,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359094284] [2021-11-07 07:32:59,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359094284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:32:59,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567257830] [2021-11-07 07:32:59,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:32:59,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:32:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:32:59,483 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:32:59,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:34:32,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:34:32,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:32,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 4059 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:34:32,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-07 07:34:33,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567257830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:33,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:33,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-11-07 07:34:33,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25629921] [2021-11-07 07:34:33,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:34:33,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:34:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:34:33,747 INFO L87 Difference]: Start difference. First operand 3372 states and 4506 transitions. Second operand has 13 states, 13 states have (on average 16.846153846153847) internal successors, (219), 12 states have internal predecessors, (219), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:34:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:39,657 INFO L93 Difference]: Finished difference Result 7003 states and 9410 transitions. [2021-11-07 07:34:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:34:39,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.846153846153847) internal successors, (219), 12 states have internal predecessors, (219), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 229 [2021-11-07 07:34:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:39,677 INFO L225 Difference]: With dead ends: 7003 [2021-11-07 07:34:39,677 INFO L226 Difference]: Without dead ends: 3678 [2021-11-07 07:34:39,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:34:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-11-07 07:34:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3388. [2021-11-07 07:34:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3066 states have (on average 1.3118069145466407) internal successors, (4022), 3077 states have internal predecessors, (4022), 214 states have call successors, (214), 86 states have call predecessors, (214), 102 states have return successors, (286), 232 states have call predecessors, (286), 214 states have call successors, (286) [2021-11-07 07:34:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 4522 transitions. [2021-11-07 07:34:39,903 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 4522 transitions. Word has length 229 [2021-11-07 07:34:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:39,904 INFO L470 AbstractCegarLoop]: Abstraction has 3388 states and 4522 transitions. [2021-11-07 07:34:39,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.846153846153847) internal successors, (219), 12 states have internal predecessors, (219), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:34:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 4522 transitions. [2021-11-07 07:34:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-07 07:34:39,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:39,911 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:40,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:40,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:34:40,135 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __vfio_group_unset_containerErr0ASSERT_VIOLATIONERROR_FUNCTION === [vfio_ioctl_check_extensionErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr0ASSERT_VIOLATIONERROR_FUNCTION, vfio_ioctl_set_iommuErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 07:34:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:40,136 INFO L85 PathProgramCache]: Analyzing trace with hash 861679679, now seen corresponding path program 3 times [2021-11-07 07:34:40,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:40,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909812217] [2021-11-07 07:34:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:40,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:42,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2021-11-07 07:34:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-07 07:34:42,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:42,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909812217] [2021-11-07 07:34:42,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909812217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:42,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470841156] [2021-11-07 07:34:42,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:34:42,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:42,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:42,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:42,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a78fd-d6b2-4965-bee7-c88c55611a47/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process