./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f4e2d1a15968d1244ea21dd78c93930ffcefcf7ed108cd6721571103f64feb4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:07:42,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:07:42,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:07:42,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:07:42,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:07:42,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:07:42,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:07:42,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:07:42,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:07:42,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:07:42,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:07:42,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:07:42,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:07:42,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:07:42,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:07:42,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:07:42,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:07:42,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:07:42,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:07:42,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:07:42,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:07:42,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:07:42,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:07:42,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:07:42,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:07:42,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:07:42,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:07:42,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:07:42,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:07:42,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:07:42,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:07:42,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:07:42,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:07:42,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:07:42,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:07:42,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:07:42,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:07:42,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:07:42,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:07:42,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:07:42,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:07:42,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:07:42,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:07:42,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:07:42,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:07:42,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:07:42,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:07:42,799 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:07:42,799 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:07:42,799 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:07:42,799 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:07:42,800 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:07:42,801 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:07:42,801 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:07:42,801 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:07:42,801 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:07:42,802 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:07:42,802 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:07:42,802 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:07:42,802 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:07:42,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:07:42,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:07:42,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:07:42,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:07:42,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:07:42,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:07:42,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:07:42,805 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:07:42,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:07:42,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:07:42,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:07:42,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:07:42,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:07:42,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:07:42,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:07:42,809 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:07:42,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:07:42,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:07:42,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:07:42,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:07:42,810 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4e2d1a15968d1244ea21dd78c93930ffcefcf7ed108cd6721571103f64feb4f [2021-11-23 02:07:43,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:07:43,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:07:43,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:07:43,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:07:43,155 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:07:43,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i [2021-11-23 02:07:43,226 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data/552a3eb84/d201f5068a4a4341a5a20092cc4f3339/FLAG0be0280f2 [2021-11-23 02:07:44,108 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:07:44,109 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i [2021-11-23 02:07:44,203 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data/552a3eb84/d201f5068a4a4341a5a20092cc4f3339/FLAG0be0280f2 [2021-11-23 02:07:44,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data/552a3eb84/d201f5068a4a4341a5a20092cc4f3339 [2021-11-23 02:07:44,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:07:44,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:07:44,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:07:44,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:07:44,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:07:44,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:44" (1/1) ... [2021-11-23 02:07:44,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@acb036c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:44, skipping insertion in model container [2021-11-23 02:07:44,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:44" (1/1) ... [2021-11-23 02:07:44,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:07:44,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:07:47,283 WARN L230 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_00095a4d-dd23-4ad0-8896-d416ce8f49b2/sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i[372197,372210] [2021-11-23 02:07:47,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:07:47,416 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:07:47,914 WARN L230 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_00095a4d-dd23-4ad0-8896-d416ce8f49b2/sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i[372197,372210] [2021-11-23 02:07:47,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:07:48,042 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:07:48,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48 WrapperNode [2021-11-23 02:07:48,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:07:48,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:07:48,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:07:48,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:07:48,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,393 INFO L137 Inliner]: procedures = 335, calls = 2629, calls flagged for inlining = 138, calls inlined = 130, statements flattened = 6648 [2021-11-23 02:07:48,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:07:48,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:07:48,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:07:48,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:07:48,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:07:48,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:07:48,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:07:48,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:07:48,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (1/1) ... [2021-11-23 02:07:48,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:07:48,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:48,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:07:48,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:07:48,876 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_add_used_and_signal [2021-11-23 02:07:48,877 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_add_used_and_signal [2021-11-23 02:07:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toiovecend [2021-11-23 02:07:48,877 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toiovecend [2021-11-23 02:07:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure handle_tx_net [2021-11-23 02:07:48,877 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_tx_net [2021-11-23 02:07:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_vq_free_iovecs [2021-11-23 02:07:48,878 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_vq_free_iovecs [2021-11-23 02:07:48,878 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-23 02:07:48,878 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-23 02:07:48,878 INFO L130 BoogieDeclarations]: Found specification of procedure vq_access_ok [2021-11-23 02:07:48,878 INFO L138 BoogieDeclarations]: Found implementation of procedure vq_access_ok [2021-11-23 02:07:48,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:07:48,878 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_flush [2021-11-23 02:07:48,879 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_flush [2021-11-23 02:07:48,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:07:48,879 INFO L130 BoogieDeclarations]: Found specification of procedure wake_up_process [2021-11-23 02:07:48,879 INFO L138 BoogieDeclarations]: Found implementation of procedure wake_up_process [2021-11-23 02:07:48,879 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_dev_check_owner [2021-11-23 02:07:48,879 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_dev_check_owner [2021-11-23 02:07:48,880 INFO L130 BoogieDeclarations]: Found specification of procedure log_write [2021-11-23 02:07:48,880 INFO L138 BoogieDeclarations]: Found implementation of procedure log_write [2021-11-23 02:07:48,880 INFO L130 BoogieDeclarations]: Found specification of procedure handle_tx [2021-11-23 02:07:48,880 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_tx [2021-11-23 02:07:48,880 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-23 02:07:48,880 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-23 02:07:48,881 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 02:07:48,881 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 02:07:48,881 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 02:07:48,881 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 02:07:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_vq_reset [2021-11-23 02:07:48,882 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_vq_reset [2021-11-23 02:07:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:07:48,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:07:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure vq_log_access_ok [2021-11-23 02:07:48,882 INFO L138 BoogieDeclarations]: Found implementation of procedure vq_log_access_ok [2021-11-23 02:07:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:07:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:07:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:07:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:07:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure __put_user_bad [2021-11-23 02:07:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-23 02:07:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-23 02:07:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure __vhost_add_used_n [2021-11-23 02:07:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __vhost_add_used_n [2021-11-23 02:07:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure tx_poll_start [2021-11-23 02:07:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_poll_start [2021-11-23 02:07:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_queue [2021-11-23 02:07:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_queue [2021-11-23 02:07:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure handle_rx [2021-11-23 02:07:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_rx [2021-11-23 02:07:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure handle_tx_kick [2021-11-23 02:07:48,887 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_tx_kick [2021-11-23 02:07:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_open [2021-11-23 02:07:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_open [2021-11-23 02:07:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:07:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:07:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:07:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:07:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-23 02:07:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-23 02:07:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_fget [2021-11-23 02:07:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_fget [2021-11-23 02:07:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_init [2021-11-23 02:07:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_init [2021-11-23 02:07:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:07:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:07:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:07:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure vq_memory_access_ok [2021-11-23 02:07:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure vq_memory_access_ok [2021-11-23 02:07:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure move_iovec_hdr [2021-11-23 02:07:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure move_iovec_hdr [2021-11-23 02:07:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:07:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:07:48,891 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:07:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_queue [2021-11-23 02:07:48,892 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_queue [2021-11-23 02:07:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_stop [2021-11-23 02:07:48,892 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_stop [2021-11-23 02:07:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:07:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:07:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_dev_cleanup [2021-11-23 02:07:48,893 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_dev_cleanup [2021-11-23 02:07:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_zerocopy_callback [2021-11-23 02:07:48,893 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_zerocopy_callback [2021-11-23 02:07:48,894 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:07:48,894 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:07:48,894 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_flush_vq [2021-11-23 02:07:48,894 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_flush_vq [2021-11-23 02:07:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_stop_vq [2021-11-23 02:07:48,895 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_stop_vq [2021-11-23 02:07:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 02:07:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 02:07:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-23 02:07:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-23 02:07:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:07:48,897 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:07:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure fput [2021-11-23 02:07:48,897 INFO L138 BoogieDeclarations]: Found implementation of procedure fput [2021-11-23 02:07:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 02:07:48,897 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 02:07:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure next_desc [2021-11-23 02:07:48,898 INFO L138 BoogieDeclarations]: Found implementation of procedure next_desc [2021-11-23 02:07:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure iov_length [2021-11-23 02:07:48,898 INFO L138 BoogieDeclarations]: Found implementation of procedure iov_length [2021-11-23 02:07:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure tx_poll_stop [2021-11-23 02:07:48,899 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_poll_stop [2021-11-23 02:07:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-23 02:07:48,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-23 02:07:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 02:07:48,900 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 02:07:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:07:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 02:07:48,903 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 02:07:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_has_feature [2021-11-23 02:07:48,903 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_has_feature [2021-11-23 02:07:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-23 02:07:48,905 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-23 02:07:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:07:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_lock [2021-11-23 02:07:48,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_lock [2021-11-23 02:07:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:07:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_init [2021-11-23 02:07:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_init [2021-11-23 02:07:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_ctx_fileget [2021-11-23 02:07:48,913 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_ctx_fileget [2021-11-23 02:07:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_flush [2021-11-23 02:07:48,913 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_flush [2021-11-23 02:07:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-11-23 02:07:48,913 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-11-23 02:07:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:07:48,914 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:07:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure __get_user_bad [2021-11-23 02:07:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_ubuf_put [2021-11-23 02:07:48,914 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_ubuf_put [2021-11-23 02:07:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:07:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:07:48,914 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:07:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex [2021-11-23 02:07:48,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex [2021-11-23 02:07:48,989 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_unlock [2021-11-23 02:07:48,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_unlock [2021-11-23 02:07:48,989 INFO L130 BoogieDeclarations]: Found specification of procedure translate_desc [2021-11-23 02:07:48,990 INFO L138 BoogieDeclarations]: Found implementation of procedure translate_desc [2021-11-23 02:07:48,990 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_ctx_put [2021-11-23 02:07:48,990 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_ctx_put [2021-11-23 02:07:48,990 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_ioctl [2021-11-23 02:07:48,990 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_ioctl [2021-11-23 02:07:48,990 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_disable_vq [2021-11-23 02:07:48,990 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_disable_vq [2021-11-23 02:07:48,990 INFO L130 BoogieDeclarations]: Found specification of procedure mmput [2021-11-23 02:07:48,990 INFO L138 BoogieDeclarations]: Found implementation of procedure mmput [2021-11-23 02:07:48,990 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 02:07:48,991 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 02:07:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-23 02:07:48,991 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-23 02:07:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:07:48,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:07:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_ubuf_put_and_wait [2021-11-23 02:07:48,991 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_ubuf_put_and_wait [2021-11-23 02:07:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure copy_user_generic [2021-11-23 02:07:48,991 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_user_generic [2021-11-23 02:07:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:07:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_cpu_idle [2021-11-23 02:07:48,992 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_cpu_idle [2021-11-23 02:07:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 02:07:48,992 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 02:07:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_get_vq_desc [2021-11-23 02:07:48,992 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_get_vq_desc [2021-11-23 02:07:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:07:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_signal [2021-11-23 02:07:48,992 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_signal [2021-11-23 02:07:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_enable_notify [2021-11-23 02:07:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_enable_notify [2021-11-23 02:07:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_stop [2021-11-23 02:07:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_stop [2021-11-23 02:07:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:07:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-11-23 02:07:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-11-23 02:07:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:07:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure kthread_stop [2021-11-23 02:07:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure kthread_stop [2021-11-23 02:07:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:07:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:07:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure memory_access_ok [2021-11-23 02:07:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure memory_access_ok [2021-11-23 02:07:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-23 02:07:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-23 02:07:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2021-11-23 02:07:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2021-11-23 02:07:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_seq_done [2021-11-23 02:07:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_seq_done [2021-11-23 02:07:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:07:48,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:07:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_release [2021-11-23 02:07:48,995 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_release [2021-11-23 02:07:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-23 02:07:48,995 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-23 02:07:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_disable_notify [2021-11-23 02:07:48,995 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_disable_notify [2021-11-23 02:07:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-23 02:07:48,995 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-23 02:07:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:07:48,996 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:07:48,996 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_update_used_flags [2021-11-23 02:07:48,996 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_update_used_flags [2021-11-23 02:07:48,996 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_discard_vq_desc [2021-11-23 02:07:48,996 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_discard_vq_desc [2021-11-23 02:07:48,996 INFO L130 BoogieDeclarations]: Found specification of procedure lock_is_held [2021-11-23 02:07:48,996 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_is_held [2021-11-23 02:07:48,996 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_flush [2021-11-23 02:07:48,996 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_flush [2021-11-23 02:07:48,997 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex [2021-11-23 02:07:48,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex [2021-11-23 02:07:48,997 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:07:48,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:07:48,998 INFO L130 BoogieDeclarations]: Found specification of procedure log_access_ok [2021-11-23 02:07:48,999 INFO L138 BoogieDeclarations]: Found implementation of procedure log_access_ok [2021-11-23 02:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:07:48,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:07:48,999 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_signal [2021-11-23 02:07:48,999 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_signal [2021-11-23 02:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_zerocopy_signal_used [2021-11-23 02:07:49,000 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_zerocopy_signal_used [2021-11-23 02:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_start [2021-11-23 02:07:49,000 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_start [2021-11-23 02:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-23 02:07:49,001 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-23 02:07:49,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:07:49,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:07:49,001 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 02:07:49,001 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 02:07:49,936 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:07:49,945 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:07:54,628 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5857: SUMMARY for call __copy_to_user_#t~ret139#1 := ldv__builtin_expect((if 0 != __copy_to_user_~ret~2#1 then 1 else 0), 0); srcloc: null [2021-11-23 02:07:54,628 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5857-1: assume -9223372036854775808 <= __copy_to_user_#t~ret139#1 && __copy_to_user_#t~ret139#1 <= 9223372036854775807;__copy_to_user_~tmp___1~3#1 := __copy_to_user_#t~ret139#1;havoc __copy_to_user_#t~ret139#1; [2021-11-23 02:07:54,628 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5845: SUMMARY for call __copy_to_user_#t~ret138#1 := ldv__builtin_expect((if 0 != __copy_to_user_~ret~2#1 then 1 else 0), 0); srcloc: null [2021-11-23 02:07:54,628 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5845-1: assume -9223372036854775808 <= __copy_to_user_#t~ret138#1 && __copy_to_user_#t~ret138#1 <= 9223372036854775807;__copy_to_user_~tmp___0~6#1 := __copy_to_user_#t~ret138#1;havoc __copy_to_user_#t~ret138#1; [2021-11-23 02:07:54,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5866: assume __copy_to_user_#t~switch137#1; [2021-11-23 02:07:54,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5866: assume !__copy_to_user_#t~switch137#1; [2021-11-23 02:07:54,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5858: assume 0 != __copy_to_user_~tmp___1~3#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:07:54,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5858: assume !(0 != __copy_to_user_~tmp___1~3#1);__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:07:54,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5854: assume __copy_to_user_#t~switch137#1; [2021-11-23 02:07:54,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5854: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := true; [2021-11-23 02:07:54,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5825: havoc __copy_to_user_#t~switch137#1; [2021-11-23 02:07:54,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5846: assume 0 != __copy_to_user_~tmp___0~6#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:07:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5846: assume !(0 != __copy_to_user_~tmp___0~6#1);__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:07:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5842: assume __copy_to_user_#t~switch137#1; [2021-11-23 02:07:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5842: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 16 == __copy_to_user_~size#1; [2021-11-23 02:07:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5838: assume __copy_to_user_#t~switch137#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:07:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5838: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 10 == __copy_to_user_~size#1; [2021-11-23 02:07:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5867: SUMMARY for call __copy_to_user_#t~ret140#1 := copy_user_generic(__copy_to_user_~dst#1.base, __copy_to_user_~dst#1.offset, __copy_to_user_~src#1.base, __copy_to_user_~src#1.offset, __copy_to_user_~size#1); srcloc: null [2021-11-23 02:07:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5834: assume __copy_to_user_#t~switch137#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:07:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5834: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 8 == __copy_to_user_~size#1; [2021-11-23 02:07:54,631 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5867-1: __copy_to_user_~tmp___2~4#1 := __copy_to_user_#t~ret140#1;havoc __copy_to_user_#t~ret140#1;__copy_to_user_#res#1 := (if __copy_to_user_~tmp___2~4#1 % 18446744073709551616 % 4294967296 <= 2147483647 then __copy_to_user_~tmp___2~4#1 % 18446744073709551616 % 4294967296 else __copy_to_user_~tmp___2~4#1 % 18446744073709551616 % 4294967296 - 4294967296); [2021-11-23 02:07:54,631 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5830: assume __copy_to_user_#t~switch137#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:07:54,631 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5830: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 4 == __copy_to_user_~size#1; [2021-11-23 02:07:54,631 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##1: assume __copy_to_user_#t~switch137#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:07:54,631 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##2: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 2 == __copy_to_user_~size#1; [2021-11-23 02:07:57,698 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5785: SUMMARY for call __copy_from_user_#t~ret133#1 := ldv__builtin_expect((if 0 != __copy_from_user_~ret~1#1 then 1 else 0), 0); srcloc: null [2021-11-23 02:07:57,699 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5785-1: assume -9223372036854775808 <= __copy_from_user_#t~ret133#1 && __copy_from_user_#t~ret133#1 <= 9223372036854775807;__copy_from_user_~tmp___0~5#1 := __copy_from_user_#t~ret133#1;havoc __copy_from_user_#t~ret133#1; [2021-11-23 02:07:57,699 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5786: assume 0 != __copy_from_user_~tmp___0~5#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:07:57,699 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5786: assume !(0 != __copy_from_user_~tmp___0~5#1);__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:07:57,699 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5760: havoc __copy_from_user_#t~switch132#1; [2021-11-23 02:07:57,699 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5794: assume __copy_from_user_#t~switch132#1; [2021-11-23 02:07:57,699 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5794: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := true; [2021-11-23 02:07:57,700 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5798: SUMMARY for call __copy_from_user_#t~ret134#1 := ldv__builtin_expect((if 0 != __copy_from_user_~ret~1#1 then 1 else 0), 0); srcloc: null [2021-11-23 02:07:57,700 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5798-1: assume -9223372036854775808 <= __copy_from_user_#t~ret134#1 && __copy_from_user_#t~ret134#1 <= 9223372036854775807;__copy_from_user_~tmp___1~2#1 := __copy_from_user_#t~ret134#1;havoc __copy_from_user_#t~ret134#1; [2021-11-23 02:07:57,700 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5799: assume 0 != __copy_from_user_~tmp___1~2#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:07:57,700 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5799: assume !(0 != __copy_from_user_~tmp___1~2#1);__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:07:57,700 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5766: assume __copy_from_user_#t~switch132#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:07:57,700 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5766: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 4 == __copy_from_user_~size#1; [2021-11-23 02:07:57,700 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5771: assume __copy_from_user_#t~switch132#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:07:57,701 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5771: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 8 == __copy_from_user_~size#1; [2021-11-23 02:07:57,701 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##75: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 2 == __copy_from_user_~size#1; [2021-11-23 02:07:57,701 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##74: assume __copy_from_user_#t~switch132#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:07:57,701 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5807: assume __copy_from_user_#t~switch132#1; [2021-11-23 02:07:57,701 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5807: assume !__copy_from_user_#t~switch132#1; [2021-11-23 02:07:57,701 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5808-1: __copy_from_user_~tmp___2~3#1 := __copy_from_user_#t~ret135#1;havoc __copy_from_user_#t~ret135#1;__copy_from_user_#res#1 := (if __copy_from_user_~tmp___2~3#1 % 18446744073709551616 % 4294967296 <= 2147483647 then __copy_from_user_~tmp___2~3#1 % 18446744073709551616 % 4294967296 else __copy_from_user_~tmp___2~3#1 % 18446744073709551616 % 4294967296 - 4294967296); [2021-11-23 02:07:57,701 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5808: SUMMARY for call __copy_from_user_#t~ret135#1 := copy_user_generic(__copy_from_user_~dst#1.base, __copy_from_user_~dst#1.offset, __copy_from_user_~src#1.base, __copy_from_user_~src#1.offset, __copy_from_user_~size#1); srcloc: null [2021-11-23 02:07:57,702 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5776: assume __copy_from_user_#t~switch132#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:07:57,702 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5776: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 10 == __copy_from_user_~size#1; [2021-11-23 02:07:57,702 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5781: assume __copy_from_user_#t~switch132#1; [2021-11-23 02:07:57,702 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5781: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 16 == __copy_from_user_~size#1; [2021-11-23 02:07:58,879 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:08:00,578 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:08:00,579 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:08:00,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:08:00 BoogieIcfgContainer [2021-11-23 02:08:00,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:08:00,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:08:00,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:08:00,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:08:00,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:07:44" (1/3) ... [2021-11-23 02:08:00,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e19612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:08:00, skipping insertion in model container [2021-11-23 02:08:00,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:48" (2/3) ... [2021-11-23 02:08:00,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e19612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:08:00, skipping insertion in model container [2021-11-23 02:08:00,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:08:00" (3/3) ... [2021-11-23 02:08:00,595 INFO L111 eAbstractionObserver]: Analyzing ICFG main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i [2021-11-23 02:08:00,604 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:08:00,605 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:08:00,683 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:08:00,693 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=FINITE_AUTOMATA, 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 [2021-11-23 02:08:00,693 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:08:00,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 1814 states, 1125 states have (on average 1.3217777777777777) internal successors, (1487), 1171 states have internal predecessors, (1487), 579 states have call successors, (579), 108 states have call predecessors, (579), 108 states have return successors, (579), 574 states have call predecessors, (579), 579 states have call successors, (579) [2021-11-23 02:08:00,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:08:00,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:00,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:00,804 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1664661916, now seen corresponding path program 1 times [2021-11-23 02:08:00,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:00,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212758509] [2021-11-23 02:08:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:00,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:01,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212758509] [2021-11-23 02:08:01,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212758509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:01,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:01,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:08:01,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397061981] [2021-11-23 02:08:01,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:08:01,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:01,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:08:01,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:01,423 INFO L87 Difference]: Start difference. First operand has 1814 states, 1125 states have (on average 1.3217777777777777) internal successors, (1487), 1171 states have internal predecessors, (1487), 579 states have call successors, (579), 108 states have call predecessors, (579), 108 states have return successors, (579), 574 states have call predecessors, (579), 579 states have call successors, (579) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 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) [2021-11-23 02:08:03,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:04,492 INFO L93 Difference]: Finished difference Result 3622 states and 5351 transitions. [2021-11-23 02:08:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:08:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 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 10 [2021-11-23 02:08:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:04,535 INFO L225 Difference]: With dead ends: 3622 [2021-11-23 02:08:04,535 INFO L226 Difference]: Without dead ends: 1806 [2021-11-23 02:08:04,555 INFO L932 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 [2021-11-23 02:08:04,559 INFO L933 BasicCegarLoop]: 2411 mSDtfsCounter, 2628 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2630 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:04,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2630 Valid, 2411 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:08:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-11-23 02:08:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1806. [2021-11-23 02:08:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1120 states have (on average 1.3169642857142858) internal successors, (1475), 1163 states have internal predecessors, (1475), 578 states have call successors, (578), 108 states have call predecessors, (578), 107 states have return successors, (573), 568 states have call predecessors, (573), 573 states have call successors, (573) [2021-11-23 02:08:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2626 transitions. [2021-11-23 02:08:04,845 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2626 transitions. Word has length 10 [2021-11-23 02:08:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:04,847 INFO L470 AbstractCegarLoop]: Abstraction has 1806 states and 2626 transitions. [2021-11-23 02:08:04,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 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) [2021-11-23 02:08:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2626 transitions. [2021-11-23 02:08:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:08:04,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:04,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:04,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:08:04,850 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:04,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash -65941382, now seen corresponding path program 1 times [2021-11-23 02:08:04,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:04,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723279828] [2021-11-23 02:08:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:04,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:04,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:04,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723279828] [2021-11-23 02:08:04,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723279828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:04,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:04,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:08:04,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495808527] [2021-11-23 02:08:04,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:04,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:08:04,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:08:04,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:04,973 INFO L87 Difference]: Start difference. First operand 1806 states and 2626 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 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) [2021-11-23 02:08:07,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:07,963 INFO L93 Difference]: Finished difference Result 1808 states and 2627 transitions. [2021-11-23 02:08:07,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:08:07,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 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 11 [2021-11-23 02:08:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:07,984 INFO L225 Difference]: With dead ends: 1808 [2021-11-23 02:08:07,984 INFO L226 Difference]: Without dead ends: 1805 [2021-11-23 02:08:07,986 INFO L932 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 [2021-11-23 02:08:07,988 INFO L933 BasicCegarLoop]: 2400 mSDtfsCounter, 2615 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2617 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:07,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2617 Valid, 2400 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 02:08:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-11-23 02:08:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1805. [2021-11-23 02:08:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1120 states have (on average 1.3160714285714286) internal successors, (1474), 1162 states have internal predecessors, (1474), 577 states have call successors, (577), 108 states have call predecessors, (577), 107 states have return successors, (573), 568 states have call predecessors, (573), 573 states have call successors, (573) [2021-11-23 02:08:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 2624 transitions. [2021-11-23 02:08:08,233 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 2624 transitions. Word has length 11 [2021-11-23 02:08:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:08,233 INFO L470 AbstractCegarLoop]: Abstraction has 1805 states and 2624 transitions. [2021-11-23 02:08:08,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 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) [2021-11-23 02:08:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 2624 transitions. [2021-11-23 02:08:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:08:08,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:08,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:08,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:08:08,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2045207513, now seen corresponding path program 1 times [2021-11-23 02:08:08,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:08,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526560628] [2021-11-23 02:08:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:08,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:08,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526560628] [2021-11-23 02:08:08,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526560628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:08,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:08,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:08:08,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345978208] [2021-11-23 02:08:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:08,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:08:08,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:08:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:08,354 INFO L87 Difference]: Start difference. First operand 1805 states and 2624 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 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) [2021-11-23 02:08:10,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:11,156 INFO L93 Difference]: Finished difference Result 1807 states and 2625 transitions. [2021-11-23 02:08:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:08:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 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 12 [2021-11-23 02:08:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:11,174 INFO L225 Difference]: With dead ends: 1807 [2021-11-23 02:08:11,174 INFO L226 Difference]: Without dead ends: 1804 [2021-11-23 02:08:11,176 INFO L932 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 [2021-11-23 02:08:11,180 INFO L933 BasicCegarLoop]: 2398 mSDtfsCounter, 2612 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2614 SdHoareTripleChecker+Valid, 2398 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:11,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2614 Valid, 2398 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:08:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-11-23 02:08:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1804. [2021-11-23 02:08:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1120 states have (on average 1.3151785714285715) internal successors, (1473), 1161 states have internal predecessors, (1473), 576 states have call successors, (576), 108 states have call predecessors, (576), 107 states have return successors, (573), 568 states have call predecessors, (573), 573 states have call successors, (573) [2021-11-23 02:08:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2622 transitions. [2021-11-23 02:08:11,337 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2622 transitions. Word has length 12 [2021-11-23 02:08:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:11,338 INFO L470 AbstractCegarLoop]: Abstraction has 1804 states and 2622 transitions. [2021-11-23 02:08:11,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 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) [2021-11-23 02:08:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2622 transitions. [2021-11-23 02:08:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:08:11,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:11,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:11,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:08:11,340 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1022056733, now seen corresponding path program 1 times [2021-11-23 02:08:11,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:11,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603829968] [2021-11-23 02:08:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:11,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:11,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603829968] [2021-11-23 02:08:11,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603829968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:11,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:11,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:08:11,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745271978] [2021-11-23 02:08:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:11,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:08:11,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:08:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:11,456 INFO L87 Difference]: Start difference. First operand 1804 states and 2622 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 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) [2021-11-23 02:08:13,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:14,853 INFO L93 Difference]: Finished difference Result 4135 states and 5979 transitions. [2021-11-23 02:08:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:08:14,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 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 13 [2021-11-23 02:08:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:14,877 INFO L225 Difference]: With dead ends: 4135 [2021-11-23 02:08:14,877 INFO L226 Difference]: Without dead ends: 2328 [2021-11-23 02:08:14,889 INFO L932 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 [2021-11-23 02:08:14,891 INFO L933 BasicCegarLoop]: 2757 mSDtfsCounter, 1045 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 4805 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:14,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1047 Valid, 4805 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 471 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:08:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-11-23 02:08:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2324. [2021-11-23 02:08:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 1424 states have (on average 1.2949438202247192) internal successors, (1844), 1486 states have internal predecessors, (1844), 721 states have call successors, (721), 182 states have call predecessors, (721), 178 states have return successors, (731), 698 states have call predecessors, (731), 708 states have call successors, (731) [2021-11-23 02:08:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3296 transitions. [2021-11-23 02:08:15,207 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3296 transitions. Word has length 13 [2021-11-23 02:08:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:15,208 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 3296 transitions. [2021-11-23 02:08:15,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 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) [2021-11-23 02:08:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3296 transitions. [2021-11-23 02:08:15,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:08:15,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:15,221 INFO L514 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] [2021-11-23 02:08:15,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:08:15,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1039019793, now seen corresponding path program 1 times [2021-11-23 02:08:15,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:15,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283166969] [2021-11-23 02:08:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:15,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:08:15,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:15,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283166969] [2021-11-23 02:08:15,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283166969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:15,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:15,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:08:15,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855250759] [2021-11-23 02:08:15,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:15,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:08:15,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:15,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:08:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:15,406 INFO L87 Difference]: Start difference. First operand 2324 states and 3296 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:08:17,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:18,551 INFO L93 Difference]: Finished difference Result 4659 states and 6612 transitions. [2021-11-23 02:08:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:08:18,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2021-11-23 02:08:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:18,572 INFO L225 Difference]: With dead ends: 4659 [2021-11-23 02:08:18,573 INFO L226 Difference]: Without dead ends: 2339 [2021-11-23 02:08:18,588 INFO L932 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 [2021-11-23 02:08:18,590 INFO L933 BasicCegarLoop]: 2385 mSDtfsCounter, 12 mSDsluCounter, 2591 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 4759 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:18,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 4759 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 446 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 02:08:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2021-11-23 02:08:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2339. [2021-11-23 02:08:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 1435 states have (on average 1.2954703832752614) internal successors, (1859), 1497 states have internal predecessors, (1859), 725 states have call successors, (725), 182 states have call predecessors, (725), 178 states have return successors, (735), 702 states have call predecessors, (735), 712 states have call successors, (735) [2021-11-23 02:08:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 3319 transitions. [2021-11-23 02:08:18,779 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 3319 transitions. Word has length 46 [2021-11-23 02:08:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:18,779 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 3319 transitions. [2021-11-23 02:08:18,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:08:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 3319 transitions. [2021-11-23 02:08:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:08:18,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:18,783 INFO L514 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] [2021-11-23 02:08:18,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:08:18,784 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2061190592, now seen corresponding path program 1 times [2021-11-23 02:08:18,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:18,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554245866] [2021-11-23 02:08:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:18,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:08:18,960 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:18,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554245866] [2021-11-23 02:08:18,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554245866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:18,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:18,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:08:18,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799150127] [2021-11-23 02:08:18,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:18,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:08:18,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:18,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:08:18,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:18,963 INFO L87 Difference]: Start difference. First operand 2339 states and 3319 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:08:21,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:22,265 INFO L93 Difference]: Finished difference Result 3865 states and 5419 transitions. [2021-11-23 02:08:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:08:22,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2021-11-23 02:08:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:22,281 INFO L225 Difference]: With dead ends: 3865 [2021-11-23 02:08:22,281 INFO L226 Difference]: Without dead ends: 1879 [2021-11-23 02:08:22,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:22,293 INFO L933 BasicCegarLoop]: 2234 mSDtfsCounter, 1761 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 2929 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:22,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1762 Valid, 2929 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 341 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 02:08:22,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-11-23 02:08:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1878. [2021-11-23 02:08:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1144 states have (on average 1.2805944055944056) internal successors, (1465), 1190 states have internal predecessors, (1465), 569 states have call successors, (569), 169 states have call predecessors, (569), 164 states have return successors, (554), 547 states have call predecessors, (554), 554 states have call successors, (554) [2021-11-23 02:08:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2588 transitions. [2021-11-23 02:08:22,425 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2588 transitions. Word has length 46 [2021-11-23 02:08:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:22,426 INFO L470 AbstractCegarLoop]: Abstraction has 1878 states and 2588 transitions. [2021-11-23 02:08:22,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:08:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2588 transitions. [2021-11-23 02:08:22,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:08:22,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:22,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:22,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:08:22,431 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash -14703897, now seen corresponding path program 1 times [2021-11-23 02:08:22,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:22,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442258430] [2021-11-23 02:08:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:22,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:08:22,591 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:08:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:08:22,789 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:08:22,789 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:08:22,791 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:08:22,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:08:22,796 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:22,800 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:08:22,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:08:22 BoogieIcfgContainer [2021-11-23 02:08:22,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:08:22,946 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:08:22,946 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:08:22,947 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:08:22,947 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:08:00" (3/4) ... [2021-11-23 02:08:22,950 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:08:22,951 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:08:22,952 INFO L158 Benchmark]: Toolchain (without parser) took 38391.26ms. Allocated memory was 123.7MB in the beginning and 528.5MB in the end (delta: 404.8MB). Free memory was 94.7MB in the beginning and 279.6MB in the end (delta: -184.9MB). Peak memory consumption was 220.9MB. Max. memory is 16.1GB. [2021-11-23 02:08:22,953 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 90.2MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:08:22,953 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3481.41ms. Allocated memory was 123.7MB in the beginning and 172.0MB in the end (delta: 48.2MB). Free memory was 94.5MB in the beginning and 102.7MB in the end (delta: -8.3MB). Peak memory consumption was 84.2MB. Max. memory is 16.1GB. [2021-11-23 02:08:22,954 INFO L158 Benchmark]: Boogie Procedure Inliner took 350.15ms. Allocated memory is still 172.0MB. Free memory was 102.7MB in the beginning and 68.4MB in the end (delta: 34.4MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2021-11-23 02:08:22,954 INFO L158 Benchmark]: Boogie Preprocessor took 395.34ms. Allocated memory is still 172.0MB. Free memory was 67.5MB in the beginning and 62.1MB in the end (delta: 5.4MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2021-11-23 02:08:22,955 INFO L158 Benchmark]: RCFGBuilder took 11794.34ms. Allocated memory was 172.0MB in the beginning and 528.5MB in the end (delta: 356.5MB). Free memory was 62.1MB in the beginning and 397.0MB in the end (delta: -334.9MB). Peak memory consumption was 197.2MB. Max. memory is 16.1GB. [2021-11-23 02:08:22,955 INFO L158 Benchmark]: TraceAbstraction took 22358.49ms. Allocated memory is still 528.5MB. Free memory was 397.0MB in the beginning and 279.6MB in the end (delta: 117.4MB). Peak memory consumption was 118.5MB. Max. memory is 16.1GB. [2021-11-23 02:08:22,955 INFO L158 Benchmark]: Witness Printer took 4.86ms. Allocated memory is still 528.5MB. Free memory is still 279.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:08:22,958 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 90.2MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3481.41ms. Allocated memory was 123.7MB in the beginning and 172.0MB in the end (delta: 48.2MB). Free memory was 94.5MB in the beginning and 102.7MB in the end (delta: -8.3MB). Peak memory consumption was 84.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 350.15ms. Allocated memory is still 172.0MB. Free memory was 102.7MB in the beginning and 68.4MB in the end (delta: 34.4MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 395.34ms. Allocated memory is still 172.0MB. Free memory was 67.5MB in the beginning and 62.1MB in the end (delta: 5.4MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * RCFGBuilder took 11794.34ms. Allocated memory was 172.0MB in the beginning and 528.5MB in the end (delta: 356.5MB). Free memory was 62.1MB in the beginning and 397.0MB in the end (delta: -334.9MB). Peak memory consumption was 197.2MB. Max. memory is 16.1GB. * TraceAbstraction took 22358.49ms. Allocated memory is still 528.5MB. Free memory was 397.0MB in the beginning and 279.6MB in the end (delta: 117.4MB). Peak memory consumption was 118.5MB. Max. memory is 16.1GB. * Witness Printer took 4.86ms. Allocated memory is still 528.5MB. Free memory is still 279.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 10992]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of large string literal at line 10595, overapproximation of bitwiseOr at line 6296. Possible FailurePath: [L5971] static unsigned int vhost_zcopy_mask ; [L9348] static int experimental_zcopytx ; [L10590-L10593] static struct file_operations const vhost_net_fops = {& __this_module, & noop_llseek, 0, 0, 0, 0, 0, 0, & vhost_net_ioctl, & vhost_net_compat_ioctl, 0, & vhost_net_open, 0, & vhost_net_release, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; [L10594-L10595] static struct miscdevice vhost_net_misc = {238, "vhost-net", & vhost_net_fops, {0, 0}, 0, 0, 0, (unsigned short)0}; [L10620] int LDV_IN_INTERRUPT ; [L11002] static int ldv_mutex_cred_guard_mutex ; [L11109] static int ldv_mutex_lock ; [L11216] static int ldv_mutex_mtx ; [L11323] static int ldv_mutex_mutex ; [L10623] struct inode *var_group1 ; [L10624] struct file *var_group2 ; [L10625] unsigned int var_vhost_net_ioctl_27_p1 ; [L10626] unsigned long var_vhost_net_ioctl_27_p2 ; [L10627] unsigned int var_vhost_net_compat_ioctl_28_p1 ; [L10628] unsigned long var_vhost_net_compat_ioctl_28_p2 ; [L10629] int res_vhost_net_open_13 ; [L10630] int ldv_s_vhost_net_fops_file_operations ; [L10631] int tmp ; [L10632] int tmp___0 ; [L10633] int tmp___1 ; [L10635] ldv_s_vhost_net_fops_file_operations = 0 [L10636] LDV_IN_INTERRUPT = 1 [L10637] CALL ldv_initialize() [L11433] ldv_mutex_cred_guard_mutex = 1 [L11434] ldv_mutex_lock = 1 [L11435] ldv_mutex_mtx = 1 [L11436] ldv_mutex_mutex = 1 [L10637] RET ldv_initialize() [L10638] FCALL ldv_handler_precall() VAL [__this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, ldv_s_vhost_net_fops_file_operations=0, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10639] CALL, EXPR vhost_net_init() [L10598] int tmp ; [L10600] COND FALSE !(experimental_zcopytx != 0) [L10604] CALL, EXPR misc_register(& vhost_net_misc) [L11595] return __VERIFIER_nondet_int(); [L10604] RET, EXPR misc_register(& vhost_net_misc) [L10604] tmp = misc_register(& vhost_net_misc) [L10605] return (tmp); [L10639] RET, EXPR vhost_net_init() [L10639] tmp = vhost_net_init() [L10640] COND FALSE !(tmp != 0) VAL [__this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, ldv_s_vhost_net_fops_file_operations=0, tmp=0, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10682] tmp___1 = __VERIFIER_nondet_int() [L10683] COND TRUE tmp___1 != 0 || ldv_s_vhost_net_fops_file_operations != 0 [L10646] tmp___0 = __VERIFIER_nondet_int() [L10648] case 0: [L10661] case 1: [L10669] case 2: VAL [__this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, ldv_s_vhost_net_fops_file_operations=0, tmp=0, tmp___0=2, tmp___1=-2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10670] FCALL ldv_handler_precall() VAL [__this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, ldv_s_vhost_net_fops_file_operations=0, tmp=0, tmp___0=2, tmp___1=-2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10671] CALL vhost_net_ioctl(var_group2, var_vhost_net_ioctl_27_p1, var_vhost_net_ioctl_27_p2) VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10521] struct vhost_net *n ; [L10522] void *argp ; [L10523] u64 *featurep ; [L10524] struct vhost_vring_file backend ; [L10525] u64 features ; [L10526] int r ; [L10527] unsigned long tmp ; [L10528] long tmp___0 ; [L10529] int tmp___1 ; [L10530] unsigned long tmp___2 ; [L10531] int tmp___3 ; [L10532] long tmp___4 ; [L10533] long tmp___5 ; [L10535] EXPR f->private_data [L10535] n = (struct vhost_net *)f->private_data [L10536] argp = (void *)arg [L10537] featurep = (u64 *)argp [L10539] case 1074310960U: [L10547] case 2148052736U: [L10555] case 1074310912U: [L10567] case 44802U: [L10568] CALL vhost_net_reset_owner(n) [L10445] struct socket *tx_sock ; [L10446] struct socket *rx_sock ; [L10447] long err ; [L10449] tx_sock = 0 [L10450] rx_sock = 0 [L10451] CALL ldv_mutex_lock_66(& n->dev.mutex) [L10919] CALL ldv_mutex_lock_mutex(ldv_func_arg1) VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, lock={44806:-17400}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L11361] COND TRUE ldv_mutex_mutex == 1 VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, lock={44806:-17400}, lock={44806:-17400}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L11365] ldv_mutex_mutex = 2 [L10919] RET ldv_mutex_lock_mutex(ldv_func_arg1) VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, experimental_zcopytx=0, ldv_func_arg1={44806:-17400}, ldv_func_arg1={44806:-17400}, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10920] FCALL mutex_lock(ldv_func_arg1) VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, experimental_zcopytx=0, ldv_func_arg1={44806:-17400}, ldv_func_arg1={44806:-17400}, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10451] RET ldv_mutex_lock_66(& n->dev.mutex) [L10452] CALL, EXPR vhost_dev_check_owner(& n->dev) VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, dev={44806:-17416}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L6410] struct task_struct *tmp ; VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, dev={44806:-17416}, dev={44806:-17416}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L6412] CALL, EXPR get_current() VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L5283] struct task_struct *pfo_ret__ ; [L5286] case 1UL: [L5289] case 2UL: [L5292] case 4UL: [L5295] case 8UL: [L5302] return (pfo_ret__); [L6412] RET, EXPR get_current() VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, dev={44806:-17416}, dev={44806:-17416}, experimental_zcopytx=0, get_current()={44805:-4}, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L6412] tmp = get_current() [L6413] EXPR dev->mm [L6413] EXPR tmp->mm [L6413] EXPR (unsigned long )dev->mm == (unsigned long )tmp->mm ? 0L : -1L [L6413] return ((unsigned long )dev->mm == (unsigned long )tmp->mm ? 0L : -1L); [L10452] RET, EXPR vhost_dev_check_owner(& n->dev) VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, n={44806:-17416}, n={44806:-17416}, rx_sock={220:0}, tx_sock={217:0}, vhost_dev_check_owner(& n->dev)=0, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10452] err = vhost_dev_check_owner(& n->dev) [L10453] COND FALSE !(err != 0L) VAL [\old(ldv_mutex_mutex)=1, __this_module={44810:44811}, err=0, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, n={44806:-17416}, n={44806:-17416}, rx_sock={220:0}, tx_sock={217:0}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10457] CALL vhost_net_stop(n, & tx_sock, & rx_sock) VAL [\old(ldv_mutex_mutex)=2, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, n={44806:-17416}, rx_sock={220:0}, tx_sock={217:0}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10183] CALL vhost_net_stop_vq(n, (struct vhost_virtqueue *)(& n->vqs) + 1UL) VAL [\old(ldv_mutex_mutex)=2, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, n={44806:-17416}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0, vq={44806:0}] [L10155] struct socket *sock ; [L10156] bool __warned ; [L10157] int tmp ; [L10158] int tmp___0 ; [L10160] CALL ldv_mutex_lock_56(& vq->mutex) [L10839] CALL ldv_mutex_lock_mutex(ldv_func_arg1) VAL [\old(ldv_mutex_mutex)=2, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, lock={44806:8}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L11361] COND FALSE !(ldv_mutex_mutex == 1) VAL [\old(ldv_mutex_mutex)=2, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, lock={44806:8}, lock={44806:8}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L11363] CALL ldv_error() VAL [\old(ldv_mutex_mutex)=2, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10992] reach_error() VAL [\old(ldv_mutex_mutex)=2, __this_module={44810:44811}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 109 procedures, 1814 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22.1s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 19.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 10688 SdHoareTripleChecker+Valid, 17.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10673 mSDsluCounter, 19702 SdHoareTripleChecker+Invalid, 16.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5626 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1928 IncrementalHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 14585 mSDtfsCounter, 1928 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2339occurred in iteration=5, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 02:08:23,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f4e2d1a15968d1244ea21dd78c93930ffcefcf7ed108cd6721571103f64feb4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:08:25,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:08:25,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:08:25,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:08:25,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:08:25,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:08:25,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:08:25,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:08:25,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:08:25,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:08:25,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:08:25,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:08:25,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:08:25,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:08:25,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:08:25,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:08:25,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:08:25,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:08:25,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:08:25,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:08:25,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:08:25,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:08:25,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:08:25,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:08:25,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:08:25,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:08:25,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:08:25,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:08:25,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:08:25,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:08:25,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:08:25,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:08:25,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:08:25,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:08:25,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:08:25,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:08:25,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:08:25,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:08:25,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:08:25,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:08:25,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:08:25,559 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-23 02:08:25,586 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:08:25,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:08:25,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:08:25,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:08:25,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:08:25,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:08:25,590 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:08:25,590 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:08:25,590 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:08:25,591 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:08:25,591 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:08:25,592 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:08:25,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:08:25,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:08:25,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:08:25,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:08:25,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:08:25,595 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:08:25,596 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:08:25,596 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:08:25,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:08:25,597 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:08:25,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:08:25,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:08:25,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:08:25,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:08:25,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:08:25,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:08:25,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:08:25,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:08:25,599 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:08:25,600 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:08:25,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:08:25,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:08:25,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:08:25,601 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4e2d1a15968d1244ea21dd78c93930ffcefcf7ed108cd6721571103f64feb4f [2021-11-23 02:08:26,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:08:26,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:08:26,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:08:26,068 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:08:26,069 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:08:26,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i [2021-11-23 02:08:26,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data/90175e49d/fd926ee8b19444258a8cecb117aa5632/FLAG26738c6d0 [2021-11-23 02:08:27,270 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:08:27,272 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i [2021-11-23 02:08:27,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data/90175e49d/fd926ee8b19444258a8cecb117aa5632/FLAG26738c6d0 [2021-11-23 02:08:27,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/data/90175e49d/fd926ee8b19444258a8cecb117aa5632 [2021-11-23 02:08:27,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:08:27,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:08:27,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:08:27,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:08:27,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:08:27,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:27" (1/1) ... [2021-11-23 02:08:27,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ce26df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:27, skipping insertion in model container [2021-11-23 02:08:27,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:27" (1/1) ... [2021-11-23 02:08:27,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:08:27,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:08:30,387 WARN L230 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_00095a4d-dd23-4ad0-8896-d416ce8f49b2/sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i[372197,372210] [2021-11-23 02:08:30,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:08:30,535 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:08:30,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:08:30,977 WARN L230 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_00095a4d-dd23-4ad0-8896-d416ce8f49b2/sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i[372197,372210] [2021-11-23 02:08:30,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:08:30,996 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:08:31,546 WARN L230 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_00095a4d-dd23-4ad0-8896-d416ce8f49b2/sv-benchmarks/c/ldv-linux-3.7.3/main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i[372197,372210] [2021-11-23 02:08:31,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:08:31,723 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:08:31,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31 WrapperNode [2021-11-23 02:08:31,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:08:31,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:08:31,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:08:31,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:08:31,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:31,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:32,217 INFO L137 Inliner]: procedures = 350, calls = 2627, calls flagged for inlining = 143, calls inlined = 135, statements flattened = 6447 [2021-11-23 02:08:32,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:08:32,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:08:32,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:08:32,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:08:32,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:32,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:32,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:32,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:32,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:32,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:32,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:32,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:08:32,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:08:32,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:08:32,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:08:32,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (1/1) ... [2021-11-23 02:08:32,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:08:32,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:32,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:08:32,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:08:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_add_used_and_signal [2021-11-23 02:08:32,632 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_add_used_and_signal [2021-11-23 02:08:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toiovecend [2021-11-23 02:08:32,632 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toiovecend [2021-11-23 02:08:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure handle_tx_net [2021-11-23 02:08:32,632 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_tx_net [2021-11-23 02:08:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 02:08:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_vq_free_iovecs [2021-11-23 02:08:32,633 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_vq_free_iovecs [2021-11-23 02:08:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-23 02:08:32,633 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-23 02:08:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 02:08:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:08:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure vq_access_ok [2021-11-23 02:08:32,634 INFO L138 BoogieDeclarations]: Found implementation of procedure vq_access_ok [2021-11-23 02:08:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:08:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-23 02:08:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_flush [2021-11-23 02:08:32,635 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_flush [2021-11-23 02:08:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:08:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure wake_up_process [2021-11-23 02:08:32,635 INFO L138 BoogieDeclarations]: Found implementation of procedure wake_up_process [2021-11-23 02:08:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_dev_check_owner [2021-11-23 02:08:32,635 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_dev_check_owner [2021-11-23 02:08:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure log_write [2021-11-23 02:08:32,636 INFO L138 BoogieDeclarations]: Found implementation of procedure log_write [2021-11-23 02:08:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure handle_tx [2021-11-23 02:08:32,636 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_tx [2021-11-23 02:08:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-23 02:08:32,636 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-23 02:08:32,637 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 02:08:32,637 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 02:08:32,637 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 02:08:32,638 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 02:08:32,638 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_vq_reset [2021-11-23 02:08:32,638 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_vq_reset [2021-11-23 02:08:32,638 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:08:32,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:08:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure vq_log_access_ok [2021-11-23 02:08:32,639 INFO L138 BoogieDeclarations]: Found implementation of procedure vq_log_access_ok [2021-11-23 02:08:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:08:32,639 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:08:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:08:32,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:08:32,640 INFO L130 BoogieDeclarations]: Found specification of procedure __put_user_bad [2021-11-23 02:08:32,640 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-23 02:08:32,640 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-23 02:08:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure __vhost_add_used_n [2021-11-23 02:08:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __vhost_add_used_n [2021-11-23 02:08:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure tx_poll_start [2021-11-23 02:08:32,643 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_poll_start [2021-11-23 02:08:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_queue [2021-11-23 02:08:32,644 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_queue [2021-11-23 02:08:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure handle_rx [2021-11-23 02:08:32,644 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_rx [2021-11-23 02:08:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure handle_tx_kick [2021-11-23 02:08:32,645 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_tx_kick [2021-11-23 02:08:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:08:32,645 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:08:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:08:32,646 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:08:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-23 02:08:32,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-23 02:08:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_fget [2021-11-23 02:08:32,647 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_fget [2021-11-23 02:08:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_init [2021-11-23 02:08:32,647 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_init [2021-11-23 02:08:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:08:32,649 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:08:32,649 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:08:32,649 INFO L130 BoogieDeclarations]: Found specification of procedure vq_memory_access_ok [2021-11-23 02:08:32,649 INFO L138 BoogieDeclarations]: Found implementation of procedure vq_memory_access_ok [2021-11-23 02:08:32,649 INFO L130 BoogieDeclarations]: Found specification of procedure move_iovec_hdr [2021-11-23 02:08:32,650 INFO L138 BoogieDeclarations]: Found implementation of procedure move_iovec_hdr [2021-11-23 02:08:32,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:08:32,650 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:08:32,650 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:08:32,650 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_queue [2021-11-23 02:08:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_queue [2021-11-23 02:08:32,651 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_stop [2021-11-23 02:08:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_stop [2021-11-23 02:08:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 02:08:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 02:08:32,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-23 02:08:32,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:08:32,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:08:32,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:08:32,653 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_dev_cleanup [2021-11-23 02:08:32,654 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_dev_cleanup [2021-11-23 02:08:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_zerocopy_callback [2021-11-23 02:08:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_zerocopy_callback [2021-11-23 02:08:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:08:32,656 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:08:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-23 02:08:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_flush_vq [2021-11-23 02:08:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_flush_vq [2021-11-23 02:08:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:08:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-23 02:08:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_stop_vq [2021-11-23 02:08:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_stop_vq [2021-11-23 02:08:32,658 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-23 02:08:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-23 02:08:32,658 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:08:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:08:32,659 INFO L130 BoogieDeclarations]: Found specification of procedure fput [2021-11-23 02:08:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure fput [2021-11-23 02:08:32,659 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 02:08:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 02:08:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure next_desc [2021-11-23 02:08:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure next_desc [2021-11-23 02:08:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure iov_length [2021-11-23 02:08:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure iov_length [2021-11-23 02:08:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure tx_poll_stop [2021-11-23 02:08:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_poll_stop [2021-11-23 02:08:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-23 02:08:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-23 02:08:32,667 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 02:08:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 02:08:32,667 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 02:08:32,668 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 02:08:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_has_feature [2021-11-23 02:08:32,675 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_has_feature [2021-11-23 02:08:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-23 02:08:32,675 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-23 02:08:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_lock [2021-11-23 02:08:32,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_lock [2021-11-23 02:08:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_init [2021-11-23 02:08:32,676 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_init [2021-11-23 02:08:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_ctx_fileget [2021-11-23 02:08:32,676 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_ctx_fileget [2021-11-23 02:08:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_flush [2021-11-23 02:08:32,676 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_flush [2021-11-23 02:08:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-11-23 02:08:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-11-23 02:08:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:08:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:08:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure __get_user_bad [2021-11-23 02:08:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_ubuf_put [2021-11-23 02:08:32,678 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_ubuf_put [2021-11-23 02:08:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:08:32,678 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:08:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex [2021-11-23 02:08:32,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex [2021-11-23 02:08:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_unlock [2021-11-23 02:08:32,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_unlock [2021-11-23 02:08:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure translate_desc [2021-11-23 02:08:32,679 INFO L138 BoogieDeclarations]: Found implementation of procedure translate_desc [2021-11-23 02:08:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_ctx_put [2021-11-23 02:08:32,679 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_ctx_put [2021-11-23 02:08:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_ioctl [2021-11-23 02:08:32,679 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_ioctl [2021-11-23 02:08:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_net_disable_vq [2021-11-23 02:08:32,680 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_net_disable_vq [2021-11-23 02:08:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-23 02:08:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-23 02:08:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-23 02:08:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-23 02:08:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure mmput [2021-11-23 02:08:32,681 INFO L138 BoogieDeclarations]: Found implementation of procedure mmput [2021-11-23 02:08:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 02:08:32,681 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 02:08:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-23 02:08:32,681 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-23 02:08:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:08:32,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:08:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_ubuf_put_and_wait [2021-11-23 02:08:32,682 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_ubuf_put_and_wait [2021-11-23 02:08:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure copy_user_generic [2021-11-23 02:08:32,682 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_user_generic [2021-11-23 02:08:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:08:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_cpu_idle [2021-11-23 02:08:32,683 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_cpu_idle [2021-11-23 02:08:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 02:08:32,683 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 02:08:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_get_vq_desc [2021-11-23 02:08:32,683 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_get_vq_desc [2021-11-23 02:08:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:08:32,684 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_signal [2021-11-23 02:08:32,684 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_signal [2021-11-23 02:08:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_enable_notify [2021-11-23 02:08:32,685 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_enable_notify [2021-11-23 02:08:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_stop [2021-11-23 02:08:32,685 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_stop [2021-11-23 02:08:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:08:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-11-23 02:08:32,686 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-11-23 02:08:32,686 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:08:32,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-23 02:08:32,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-23 02:08:32,686 INFO L130 BoogieDeclarations]: Found specification of procedure kthread_stop [2021-11-23 02:08:32,686 INFO L138 BoogieDeclarations]: Found implementation of procedure kthread_stop [2021-11-23 02:08:32,686 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:08:32,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:08:32,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-23 02:08:32,687 INFO L130 BoogieDeclarations]: Found specification of procedure memory_access_ok [2021-11-23 02:08:32,687 INFO L138 BoogieDeclarations]: Found implementation of procedure memory_access_ok [2021-11-23 02:08:32,687 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-23 02:08:32,687 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-23 02:08:32,688 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2021-11-23 02:08:32,688 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2021-11-23 02:08:32,688 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_seq_done [2021-11-23 02:08:32,688 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_seq_done [2021-11-23 02:08:32,688 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:08:32,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:08:32,688 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-23 02:08:32,689 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-23 02:08:32,689 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_disable_notify [2021-11-23 02:08:32,689 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_disable_notify [2021-11-23 02:08:32,689 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-23 02:08:32,689 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-23 02:08:32,689 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:08:32,689 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:08:32,690 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_update_used_flags [2021-11-23 02:08:32,690 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_update_used_flags [2021-11-23 02:08:32,690 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_discard_vq_desc [2021-11-23 02:08:32,690 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_discard_vq_desc [2021-11-23 02:08:32,690 INFO L130 BoogieDeclarations]: Found specification of procedure lock_is_held [2021-11-23 02:08:32,690 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_is_held [2021-11-23 02:08:32,691 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_flush [2021-11-23 02:08:32,691 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_flush [2021-11-23 02:08:32,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex [2021-11-23 02:08:32,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex [2021-11-23 02:08:32,691 INFO L130 BoogieDeclarations]: Found specification of procedure log_access_ok [2021-11-23 02:08:32,691 INFO L138 BoogieDeclarations]: Found implementation of procedure log_access_ok [2021-11-23 02:08:32,691 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:08:32,692 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:08:32,692 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:08:32,692 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:08:32,692 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_signal [2021-11-23 02:08:32,692 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_signal [2021-11-23 02:08:32,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-23 02:08:32,692 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_zerocopy_signal_used [2021-11-23 02:08:32,693 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_zerocopy_signal_used [2021-11-23 02:08:32,693 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_start [2021-11-23 02:08:32,693 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_start [2021-11-23 02:08:32,693 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-23 02:08:32,693 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-23 02:08:32,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:08:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:08:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 02:08:32,699 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 02:08:33,615 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:08:33,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:09:02,229 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5857: SUMMARY for call __copy_to_user_#t~ret139#1 := ldv__builtin_expect(~sign_extendFrom32To64((if 0bv32 != __copy_to_user_~ret~2#1 then 1bv32 else 0bv32)), 0bv64); srcloc: null [2021-11-23 02:09:02,229 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5857-1: __copy_to_user_~tmp___1~3#1 := __copy_to_user_#t~ret139#1;havoc __copy_to_user_#t~ret139#1; [2021-11-23 02:09:02,229 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5845: SUMMARY for call __copy_to_user_#t~ret138#1 := ldv__builtin_expect(~sign_extendFrom32To64((if 0bv32 != __copy_to_user_~ret~2#1 then 1bv32 else 0bv32)), 0bv64); srcloc: null [2021-11-23 02:09:02,229 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5845-1: __copy_to_user_~tmp___0~6#1 := __copy_to_user_#t~ret138#1;havoc __copy_to_user_#t~ret138#1; [2021-11-23 02:09:02,229 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5866: assume __copy_to_user_#t~switch137#1; [2021-11-23 02:09:02,229 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5866: assume !__copy_to_user_#t~switch137#1; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5858: assume 0bv64 != __copy_to_user_~tmp___1~3#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5858: assume !(0bv64 != __copy_to_user_~tmp___1~3#1);__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5854: assume __copy_to_user_#t~switch137#1; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5854: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := true; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5825: havoc __copy_to_user_#t~switch137#1; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5846: assume 0bv64 != __copy_to_user_~tmp___0~6#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5846: assume !(0bv64 != __copy_to_user_~tmp___0~6#1);__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5842: assume __copy_to_user_#t~switch137#1; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5842: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 16bv32 == __copy_to_user_~size#1; [2021-11-23 02:09:02,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5838: assume __copy_to_user_#t~switch137#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:09:02,231 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5838: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 10bv32 == __copy_to_user_~size#1; [2021-11-23 02:09:02,231 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5867: SUMMARY for call __copy_to_user_#t~ret140#1 := copy_user_generic(__copy_to_user_~dst#1.base, __copy_to_user_~dst#1.offset, __copy_to_user_~src#1.base, __copy_to_user_~src#1.offset, __copy_to_user_~size#1); srcloc: null [2021-11-23 02:09:02,231 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5834: assume __copy_to_user_#t~switch137#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:09:02,231 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5834: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 8bv32 == __copy_to_user_~size#1; [2021-11-23 02:09:02,231 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5867-1: __copy_to_user_~tmp___2~4#1 := __copy_to_user_#t~ret140#1;havoc __copy_to_user_#t~ret140#1;__copy_to_user_#res#1 := __copy_to_user_~tmp___2~4#1[32:0]; [2021-11-23 02:09:02,231 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5830: assume __copy_to_user_#t~switch137#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:09:02,231 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5830: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 4bv32 == __copy_to_user_~size#1; [2021-11-23 02:09:02,231 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##1: assume __copy_to_user_#t~switch137#1;__copy_to_user_#res#1 := __copy_to_user_~ret~2#1; [2021-11-23 02:09:02,231 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##2: assume !__copy_to_user_#t~switch137#1;__copy_to_user_#t~switch137#1 := __copy_to_user_#t~switch137#1 || 2bv32 == __copy_to_user_~size#1; [2021-11-23 02:09:20,429 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5785: SUMMARY for call __copy_from_user_#t~ret133#1 := ldv__builtin_expect(~sign_extendFrom32To64((if 0bv32 != __copy_from_user_~ret~1#1 then 1bv32 else 0bv32)), 0bv64); srcloc: null [2021-11-23 02:09:20,430 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5785-1: __copy_from_user_~tmp___0~5#1 := __copy_from_user_#t~ret133#1;havoc __copy_from_user_#t~ret133#1; [2021-11-23 02:09:20,430 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5786: assume 0bv64 != __copy_from_user_~tmp___0~5#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:09:20,430 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5786: assume !(0bv64 != __copy_from_user_~tmp___0~5#1);__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:09:20,430 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5760: havoc __copy_from_user_#t~switch132#1; [2021-11-23 02:09:20,431 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5794: assume __copy_from_user_#t~switch132#1; [2021-11-23 02:09:20,431 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5794: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := true; [2021-11-23 02:09:20,431 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5798: SUMMARY for call __copy_from_user_#t~ret134#1 := ldv__builtin_expect(~sign_extendFrom32To64((if 0bv32 != __copy_from_user_~ret~1#1 then 1bv32 else 0bv32)), 0bv64); srcloc: null [2021-11-23 02:09:20,431 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5798-1: __copy_from_user_~tmp___1~2#1 := __copy_from_user_#t~ret134#1;havoc __copy_from_user_#t~ret134#1; [2021-11-23 02:09:20,431 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5799: assume 0bv64 != __copy_from_user_~tmp___1~2#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:09:20,431 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5799: assume !(0bv64 != __copy_from_user_~tmp___1~2#1);__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:09:20,431 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5766: assume __copy_from_user_#t~switch132#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:09:20,432 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5766: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 4bv32 == __copy_from_user_~size#1; [2021-11-23 02:09:20,432 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5771: assume __copy_from_user_#t~switch132#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:09:20,432 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5771: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 8bv32 == __copy_from_user_~size#1; [2021-11-23 02:09:20,432 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##75: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 2bv32 == __copy_from_user_~size#1; [2021-11-23 02:09:20,432 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##74: assume __copy_from_user_#t~switch132#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:09:20,432 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5807: assume __copy_from_user_#t~switch132#1; [2021-11-23 02:09:20,433 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5807: assume !__copy_from_user_#t~switch132#1; [2021-11-23 02:09:20,433 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5808-1: __copy_from_user_~tmp___2~3#1 := __copy_from_user_#t~ret135#1;havoc __copy_from_user_#t~ret135#1;__copy_from_user_#res#1 := __copy_from_user_~tmp___2~3#1[32:0]; [2021-11-23 02:09:20,433 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5808: SUMMARY for call __copy_from_user_#t~ret135#1 := copy_user_generic(__copy_from_user_~dst#1.base, __copy_from_user_~dst#1.offset, __copy_from_user_~src#1.base, __copy_from_user_~src#1.offset, __copy_from_user_~size#1); srcloc: null [2021-11-23 02:09:20,433 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5776: assume __copy_from_user_#t~switch132#1;__copy_from_user_#res#1 := __copy_from_user_~ret~1#1; [2021-11-23 02:09:20,433 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5776: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 10bv32 == __copy_from_user_~size#1; [2021-11-23 02:09:20,433 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5781: assume __copy_from_user_#t~switch132#1; [2021-11-23 02:09:20,434 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5781: assume !__copy_from_user_#t~switch132#1;__copy_from_user_#t~switch132#1 := __copy_from_user_#t~switch132#1 || 16bv32 == __copy_from_user_~size#1; [2021-11-23 02:09:30,315 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:09:30,363 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:09:30,364 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:09:30,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:30 BoogieIcfgContainer [2021-11-23 02:09:30,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:09:30,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:09:30,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:09:30,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:09:30,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:08:27" (1/3) ... [2021-11-23 02:09:30,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f3bbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:09:30, skipping insertion in model container [2021-11-23 02:09:30,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:31" (2/3) ... [2021-11-23 02:09:30,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f3bbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:09:30, skipping insertion in model container [2021-11-23 02:09:30,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:30" (3/3) ... [2021-11-23 02:09:30,384 INFO L111 eAbstractionObserver]: Analyzing ICFG main1_drivers-vhost-vhost_net-ko--32_7a--linux-3.7.3.i [2021-11-23 02:09:30,390 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:09:30,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:09:30,470 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:09:30,479 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=FINITE_AUTOMATA, 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 [2021-11-23 02:09:30,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:09:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 2218 states, 1540 states have (on average 1.346103896103896) internal successors, (2073), 1586 states have internal predecessors, (2073), 572 states have call successors, (572), 104 states have call predecessors, (572), 104 states have return successors, (572), 567 states have call predecessors, (572), 572 states have call successors, (572) [2021-11-23 02:09:30,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:09:30,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:30,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:30,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:30,561 INFO L85 PathProgramCache]: Analyzing trace with hash -801145376, now seen corresponding path program 1 times [2021-11-23 02:09:30,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:30,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258433435] [2021-11-23 02:09:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:30,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:30,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:30,581 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:30,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:09:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:09:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:31,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:31,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:09:31,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258433435] [2021-11-23 02:09:31,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258433435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:31,865 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:31,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:09:31,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442983312] [2021-11-23 02:09:31,868 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:31,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:31,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:09:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:31,912 INFO L87 Difference]: Start difference. First operand has 2218 states, 1540 states have (on average 1.346103896103896) internal successors, (2073), 1586 states have internal predecessors, (2073), 572 states have call successors, (572), 104 states have call predecessors, (572), 104 states have return successors, (572), 567 states have call predecessors, (572), 572 states have call successors, (572) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:32,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:32,403 INFO L93 Difference]: Finished difference Result 4422 states and 6498 transitions. [2021-11-23 02:09:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-23 02:09:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:32,452 INFO L225 Difference]: With dead ends: 4422 [2021-11-23 02:09:32,452 INFO L226 Difference]: Without dead ends: 2207 [2021-11-23 02:09:32,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:32,477 INFO L933 BasicCegarLoop]: 3205 mSDtfsCounter, 3193 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3193 SdHoareTripleChecker+Valid, 3205 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:32,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3193 Valid, 3205 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:09:32,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-11-23 02:09:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2021-11-23 02:09:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 1532 states have (on average 1.3426892950391645) internal successors, (2057), 1575 states have internal predecessors, (2057), 571 states have call successors, (571), 104 states have call predecessors, (571), 103 states have return successors, (566), 561 states have call predecessors, (566), 566 states have call successors, (566) [2021-11-23 02:09:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 3194 transitions. [2021-11-23 02:09:32,749 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 3194 transitions. Word has length 16 [2021-11-23 02:09:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:32,751 INFO L470 AbstractCegarLoop]: Abstraction has 2207 states and 3194 transitions. [2021-11-23 02:09:32,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 3194 transitions. [2021-11-23 02:09:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:09:32,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:32,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:32,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:32,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:32,972 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash 933280137, now seen corresponding path program 1 times [2021-11-23 02:09:32,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:32,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487089159] [2021-11-23 02:09:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:32,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:32,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:32,980 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:33,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:09:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:33,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:09:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:33,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:34,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:09:34,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487089159] [2021-11-23 02:09:34,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487089159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:34,080 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:34,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:09:34,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832228921] [2021-11-23 02:09:34,083 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:34,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:34,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:09:34,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:34,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:34,086 INFO L87 Difference]: Start difference. First operand 2207 states and 3194 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:34,449 INFO L93 Difference]: Finished difference Result 2209 states and 3195 transitions. [2021-11-23 02:09:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-23 02:09:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:34,470 INFO L225 Difference]: With dead ends: 2209 [2021-11-23 02:09:34,470 INFO L226 Difference]: Without dead ends: 2206 [2021-11-23 02:09:34,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:34,474 INFO L933 BasicCegarLoop]: 3191 mSDtfsCounter, 3178 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3178 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:34,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3178 Valid, 3191 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:09:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2021-11-23 02:09:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 2206. [2021-11-23 02:09:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 1532 states have (on average 1.3420365535248042) internal successors, (2056), 1574 states have internal predecessors, (2056), 570 states have call successors, (570), 104 states have call predecessors, (570), 103 states have return successors, (566), 561 states have call predecessors, (566), 566 states have call successors, (566) [2021-11-23 02:09:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 3192 transitions. [2021-11-23 02:09:34,694 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 3192 transitions. Word has length 17 [2021-11-23 02:09:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:34,695 INFO L470 AbstractCegarLoop]: Abstraction has 2206 states and 3192 transitions. [2021-11-23 02:09:34,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 3192 transitions. [2021-11-23 02:09:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:09:34,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:34,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:34,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:34,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:34,912 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1134098941, now seen corresponding path program 1 times [2021-11-23 02:09:34,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:34,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174071012] [2021-11-23 02:09:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:34,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:34,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:34,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:09:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:35,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:09:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:35,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:35,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:09:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174071012] [2021-11-23 02:09:35,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174071012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:35,944 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:35,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:09:35,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540834583] [2021-11-23 02:09:35,944 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:35,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:35,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:09:35,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:35,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:35,946 INFO L87 Difference]: Start difference. First operand 2206 states and 3192 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:36,153 INFO L93 Difference]: Finished difference Result 2208 states and 3193 transitions. [2021-11-23 02:09:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-23 02:09:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:36,175 INFO L225 Difference]: With dead ends: 2208 [2021-11-23 02:09:36,176 INFO L226 Difference]: Without dead ends: 2205 [2021-11-23 02:09:36,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:36,183 INFO L933 BasicCegarLoop]: 3189 mSDtfsCounter, 3175 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3175 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:36,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3175 Valid, 3189 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:09:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-11-23 02:09:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2205. [2021-11-23 02:09:36,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 1532 states have (on average 1.3413838120104438) internal successors, (2055), 1573 states have internal predecessors, (2055), 569 states have call successors, (569), 104 states have call predecessors, (569), 103 states have return successors, (566), 561 states have call predecessors, (566), 566 states have call successors, (566) [2021-11-23 02:09:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 3190 transitions. [2021-11-23 02:09:36,355 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 3190 transitions. Word has length 18 [2021-11-23 02:09:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:36,356 INFO L470 AbstractCegarLoop]: Abstraction has 2205 states and 3190 transitions. [2021-11-23 02:09:36,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 3190 transitions. [2021-11-23 02:09:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:09:36,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:36,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:36,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:36,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:36,580 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash -798336052, now seen corresponding path program 1 times [2021-11-23 02:09:36,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221576716] [2021-11-23 02:09:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:36,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:36,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:36,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:36,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:09:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:37,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:09:37,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:37,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:37,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:09:37,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221576716] [2021-11-23 02:09:37,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221576716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:37,579 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:37,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:09:37,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762276799] [2021-11-23 02:09:37,580 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:37,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:37,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:09:37,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:37,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:37,581 INFO L87 Difference]: Start difference. First operand 2205 states and 3190 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:37,888 INFO L93 Difference]: Finished difference Result 4994 states and 7160 transitions. [2021-11-23 02:09:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:37,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-23 02:09:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:37,915 INFO L225 Difference]: With dead ends: 4994 [2021-11-23 02:09:37,915 INFO L226 Difference]: Without dead ends: 2791 [2021-11-23 02:09:37,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:37,938 INFO L933 BasicCegarLoop]: 3581 mSDtfsCounter, 1201 mSDsluCounter, 2726 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 6307 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:37,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 6307 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:09:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-11-23 02:09:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2788. [2021-11-23 02:09:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 1930 states have (on average 1.3233160621761657) internal successors, (2554), 1990 states have internal predecessors, (2554), 688 states have call successors, (688), 172 states have call predecessors, (688), 169 states have return successors, (693), 667 states have call predecessors, (693), 679 states have call successors, (693) [2021-11-23 02:09:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 3935 transitions. [2021-11-23 02:09:38,154 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 3935 transitions. Word has length 19 [2021-11-23 02:09:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:38,155 INFO L470 AbstractCegarLoop]: Abstraction has 2788 states and 3935 transitions. [2021-11-23 02:09:38,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 3935 transitions. [2021-11-23 02:09:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:09:38,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:38,169 INFO L514 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] [2021-11-23 02:09:38,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:38,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:38,383 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash -587069341, now seen corresponding path program 1 times [2021-11-23 02:09:38,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:38,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578541282] [2021-11-23 02:09:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:38,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:38,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:38,386 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:38,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:09:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:09:38,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:39,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:09:39,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:09:39,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578541282] [2021-11-23 02:09:39,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578541282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:39,850 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:39,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:09:39,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95843126] [2021-11-23 02:09:39,850 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:39,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:09:39,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:09:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:09:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:09:39,852 INFO L87 Difference]: Start difference. First operand 2788 states and 3935 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 02:09:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:40,236 INFO L93 Difference]: Finished difference Result 5605 states and 7919 transitions. [2021-11-23 02:09:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:09:40,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 55 [2021-11-23 02:09:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:40,259 INFO L225 Difference]: With dead ends: 5605 [2021-11-23 02:09:40,259 INFO L226 Difference]: Without dead ends: 2828 [2021-11-23 02:09:40,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:09:40,273 INFO L933 BasicCegarLoop]: 3176 mSDtfsCounter, 58 mSDsluCounter, 6250 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 9426 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:40,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 9426 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:09:40,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-11-23 02:09:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2828. [2021-11-23 02:09:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 1962 states have (on average 1.3236493374108054) internal successors, (2597), 2022 states have internal predecessors, (2597), 696 states have call successors, (696), 172 states have call predecessors, (696), 169 states have return successors, (701), 675 states have call predecessors, (701), 687 states have call successors, (701) [2021-11-23 02:09:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 3994 transitions. [2021-11-23 02:09:40,471 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 3994 transitions. Word has length 55 [2021-11-23 02:09:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:40,472 INFO L470 AbstractCegarLoop]: Abstraction has 2828 states and 3994 transitions. [2021-11-23 02:09:40,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 02:09:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 3994 transitions. [2021-11-23 02:09:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 02:09:40,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:40,476 INFO L514 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] [2021-11-23 02:09:40,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:40,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:40,693 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1997599171, now seen corresponding path program 1 times [2021-11-23 02:09:40,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:40,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371143989] [2021-11-23 02:09:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:40,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:40,696 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:40,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:09:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:09:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:09:41,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:09:41,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:09:41,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371143989] [2021-11-23 02:09:41,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371143989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:41,782 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:41,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:09:41,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464033838] [2021-11-23 02:09:41,782 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:41,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:41,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:09:41,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:41,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:41,784 INFO L87 Difference]: Start difference. First operand 2828 states and 3994 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:09:41,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:41,998 INFO L93 Difference]: Finished difference Result 5647 states and 8045 transitions. [2021-11-23 02:09:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:41,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 59 [2021-11-23 02:09:41,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:42,022 INFO L225 Difference]: With dead ends: 5647 [2021-11-23 02:09:42,022 INFO L226 Difference]: Without dead ends: 2830 [2021-11-23 02:09:42,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:42,046 INFO L933 BasicCegarLoop]: 3167 mSDtfsCounter, 0 mSDsluCounter, 3160 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6327 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:42,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6327 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:09:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2021-11-23 02:09:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2828. [2021-11-23 02:09:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 1962 states have (on average 1.32059123343527) internal successors, (2591), 2022 states have internal predecessors, (2591), 696 states have call successors, (696), 172 states have call predecessors, (696), 169 states have return successors, (701), 675 states have call predecessors, (701), 687 states have call successors, (701) [2021-11-23 02:09:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 3988 transitions. [2021-11-23 02:09:42,306 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 3988 transitions. Word has length 59 [2021-11-23 02:09:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:42,308 INFO L470 AbstractCegarLoop]: Abstraction has 2828 states and 3988 transitions. [2021-11-23 02:09:42,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:09:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 3988 transitions. [2021-11-23 02:09:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:09:42,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:42,313 INFO L514 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] [2021-11-23 02:09:42,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:42,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:42,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:42,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1160460849, now seen corresponding path program 1 times [2021-11-23 02:09:42,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:42,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377846928] [2021-11-23 02:09:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:42,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:42,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:42,541 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:42,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:09:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:43,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:09:43,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:09:43,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:09:43,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:09:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377846928] [2021-11-23 02:09:43,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377846928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:43,797 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:43,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:09:43,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809804463] [2021-11-23 02:09:43,798 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:43,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:43,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:09:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:43,799 INFO L87 Difference]: Start difference. First operand 2828 states and 3988 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:09:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:44,052 INFO L93 Difference]: Finished difference Result 4642 states and 6495 transitions. [2021-11-23 02:09:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:44,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-11-23 02:09:44,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:44,072 INFO L225 Difference]: With dead ends: 4642 [2021-11-23 02:09:44,072 INFO L226 Difference]: Without dead ends: 2350 [2021-11-23 02:09:44,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:44,087 INFO L933 BasicCegarLoop]: 3066 mSDtfsCounter, 2146 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2146 SdHoareTripleChecker+Valid, 4068 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:44,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2146 Valid, 4068 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:09:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-11-23 02:09:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2350. [2021-11-23 02:09:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 1637 states have (on average 1.3091020158827122) internal successors, (2143), 1682 states have internal predecessors, (2143), 555 states have call successors, (555), 161 states have call predecessors, (555), 157 states have return successors, (542), 535 states have call predecessors, (542), 542 states have call successors, (542) [2021-11-23 02:09:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3240 transitions. [2021-11-23 02:09:44,241 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3240 transitions. Word has length 65 [2021-11-23 02:09:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:44,241 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 3240 transitions. [2021-11-23 02:09:44,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:09:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3240 transitions. [2021-11-23 02:09:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:09:44,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:44,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:44,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:44,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:44,462 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:44,462 INFO L85 PathProgramCache]: Analyzing trace with hash 904423170, now seen corresponding path program 1 times [2021-11-23 02:09:44,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:44,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597960008] [2021-11-23 02:09:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:44,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:44,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:44,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:44,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 02:09:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:45,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:09:45,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:09:45,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:09:46,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:09:46,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597960008] [2021-11-23 02:09:46,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597960008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:46,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:46,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-23 02:09:46,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051300595] [2021-11-23 02:09:46,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:46,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:09:46,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:09:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:09:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:09:46,033 INFO L87 Difference]: Start difference. First operand 2350 states and 3240 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:09:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:46,527 INFO L93 Difference]: Finished difference Result 2382 states and 3290 transitions. [2021-11-23 02:09:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:09:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 65 [2021-11-23 02:09:46,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:46,547 INFO L225 Difference]: With dead ends: 2382 [2021-11-23 02:09:46,547 INFO L226 Difference]: Without dead ends: 2372 [2021-11-23 02:09:46,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:09:46,550 INFO L933 BasicCegarLoop]: 2567 mSDtfsCounter, 37 mSDsluCounter, 12819 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 15386 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:46,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 15386 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:09:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-11-23 02:09:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 2355. [2021-11-23 02:09:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 1641 states have (on average 1.3083485679463742) internal successors, (2147), 1686 states have internal predecessors, (2147), 555 states have call successors, (555), 161 states have call predecessors, (555), 158 states have return successors, (545), 536 states have call predecessors, (545), 542 states have call successors, (545) [2021-11-23 02:09:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3247 transitions. [2021-11-23 02:09:46,712 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3247 transitions. Word has length 65 [2021-11-23 02:09:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:46,712 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 3247 transitions. [2021-11-23 02:09:46,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:09:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3247 transitions. [2021-11-23 02:09:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:09:46,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:46,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:46,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:46,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:46,934 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1585041309, now seen corresponding path program 1 times [2021-11-23 02:09:46,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:46,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582623341] [2021-11-23 02:09:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:46,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:46,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:46,937 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:46,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 02:09:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:09:52,790 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:09:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:09:58,866 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-23 02:09:58,866 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:09:58,867 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:09:58,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:59,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:59,090 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:59,094 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:09:59,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:09:59 BoogieIcfgContainer [2021-11-23 02:09:59,252 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:09:59,253 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:09:59,253 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:09:59,253 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:09:59,254 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:30" (3/4) ... [2021-11-23 02:09:59,257 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:09:59,257 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:09:59,258 INFO L158 Benchmark]: Toolchain (without parser) took 91629.50ms. Allocated memory was 67.1MB in the beginning and 539.0MB in the end (delta: 471.9MB). Free memory was 33.9MB in the beginning and 200.9MB in the end (delta: -167.0MB). Peak memory consumption was 303.9MB. Max. memory is 16.1GB. [2021-11-23 02:09:59,258 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 67.1MB. Free memory is still 47.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:09:59,259 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4091.64ms. Allocated memory was 67.1MB in the beginning and 224.4MB in the end (delta: 157.3MB). Free memory was 33.6MB in the beginning and 104.0MB in the end (delta: -70.4MB). Peak memory consumption was 85.2MB. Max. memory is 16.1GB. [2021-11-23 02:09:59,259 INFO L158 Benchmark]: Boogie Procedure Inliner took 493.78ms. Allocated memory is still 224.4MB. Free memory was 104.0MB in the beginning and 134.4MB in the end (delta: -30.5MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. [2021-11-23 02:09:59,260 INFO L158 Benchmark]: Boogie Preprocessor took 319.52ms. Allocated memory is still 224.4MB. Free memory was 134.4MB in the beginning and 97.5MB in the end (delta: 37.0MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2021-11-23 02:09:59,260 INFO L158 Benchmark]: RCFGBuilder took 57828.95ms. Allocated memory was 224.4MB in the beginning and 448.8MB in the end (delta: 224.4MB). Free memory was 97.5MB in the beginning and 322.4MB in the end (delta: -224.9MB). Peak memory consumption was 224.2MB. Max. memory is 16.1GB. [2021-11-23 02:09:59,260 INFO L158 Benchmark]: TraceAbstraction took 28879.31ms. Allocated memory was 448.8MB in the beginning and 539.0MB in the end (delta: 90.2MB). Free memory was 322.4MB in the beginning and 200.9MB in the end (delta: 121.5MB). Peak memory consumption was 211.6MB. Max. memory is 16.1GB. [2021-11-23 02:09:59,261 INFO L158 Benchmark]: Witness Printer took 4.46ms. Allocated memory is still 539.0MB. Free memory is still 200.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:09:59,264 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 67.1MB. Free memory is still 47.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4091.64ms. Allocated memory was 67.1MB in the beginning and 224.4MB in the end (delta: 157.3MB). Free memory was 33.6MB in the beginning and 104.0MB in the end (delta: -70.4MB). Peak memory consumption was 85.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 493.78ms. Allocated memory is still 224.4MB. Free memory was 104.0MB in the beginning and 134.4MB in the end (delta: -30.5MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 319.52ms. Allocated memory is still 224.4MB. Free memory was 134.4MB in the beginning and 97.5MB in the end (delta: 37.0MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * RCFGBuilder took 57828.95ms. Allocated memory was 224.4MB in the beginning and 448.8MB in the end (delta: 224.4MB). Free memory was 97.5MB in the beginning and 322.4MB in the end (delta: -224.9MB). Peak memory consumption was 224.2MB. Max. memory is 16.1GB. * TraceAbstraction took 28879.31ms. Allocated memory was 448.8MB in the beginning and 539.0MB in the end (delta: 90.2MB). Free memory was 322.4MB in the beginning and 200.9MB in the end (delta: 121.5MB). Peak memory consumption was 211.6MB. Max. memory is 16.1GB. * Witness Printer took 4.46ms. Allocated memory is still 539.0MB. Free memory is still 200.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 10992]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of large string literal at line 10595. Possible FailurePath: [L5971] static unsigned int vhost_zcopy_mask ; [L9348] static int experimental_zcopytx ; [L10590-L10593] static struct file_operations const vhost_net_fops = {& __this_module, & noop_llseek, 0, 0, 0, 0, 0, 0, & vhost_net_ioctl, & vhost_net_compat_ioctl, 0, & vhost_net_open, 0, & vhost_net_release, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; [L10594-L10595] static struct miscdevice vhost_net_misc = {238, "vhost-net", & vhost_net_fops, {0, 0}, 0, 0, 0, (unsigned short)0}; [L10620] int LDV_IN_INTERRUPT ; [L11002] static int ldv_mutex_cred_guard_mutex ; [L11109] static int ldv_mutex_lock ; [L11216] static int ldv_mutex_mtx ; [L11323] static int ldv_mutex_mutex ; VAL [__this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=0, ldv_mutex_cred_guard_mutex=0, ldv_mutex_lock=0, ldv_mutex_mtx=0, ldv_mutex_mutex=0, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10623] struct inode *var_group1 ; [L10624] struct file *var_group2 ; [L10625] unsigned int var_vhost_net_ioctl_27_p1 ; [L10626] unsigned long var_vhost_net_ioctl_27_p2 ; [L10627] unsigned int var_vhost_net_compat_ioctl_28_p1 ; [L10628] unsigned long var_vhost_net_compat_ioctl_28_p2 ; [L10629] int res_vhost_net_open_13 ; [L10630] int ldv_s_vhost_net_fops_file_operations ; [L10631] int tmp ; [L10632] int tmp___0 ; [L10633] int tmp___1 ; [L10635] ldv_s_vhost_net_fops_file_operations = 0 [L10636] LDV_IN_INTERRUPT = 1 [L10637] CALL ldv_initialize() [L11433] ldv_mutex_cred_guard_mutex = 1 [L11434] ldv_mutex_lock = 1 [L11435] ldv_mutex_mtx = 1 [L11436] ldv_mutex_mutex = 1 VAL [__this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10637] RET ldv_initialize() [L10638] FCALL ldv_handler_precall() VAL [__this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, ldv_s_vhost_net_fops_file_operations=0, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10639] CALL, EXPR vhost_net_init() [L10598] int tmp ; VAL [__this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10600] COND FALSE !(experimental_zcopytx != 0) VAL [__this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10604] CALL, EXPR misc_register(& vhost_net_misc) [L11595] return __VERIFIER_nondet_int(); [L10604] RET, EXPR misc_register(& vhost_net_misc) [L10604] tmp = misc_register(& vhost_net_misc) [L10605] return (tmp); VAL [\result=0, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, tmp=0, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10639] RET, EXPR vhost_net_init() [L10639] tmp = vhost_net_init() [L10640] COND FALSE !(tmp != 0) VAL [__this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, ldv_s_vhost_net_fops_file_operations=0, tmp=0, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10682] tmp___1 = __VERIFIER_nondet_int() [L10683] COND TRUE tmp___1 != 0 || ldv_s_vhost_net_fops_file_operations != 0 VAL [__this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, ldv_s_vhost_net_fops_file_operations=0, tmp=0, tmp___1=2147483648, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10646] tmp___0 = __VERIFIER_nondet_int() [L10648] case 0: [L10661] case 1: [L10669] case 2: [L10673] case 3: VAL [__this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, ldv_s_vhost_net_fops_file_operations=0, tmp=0, tmp___0=3, tmp___1=2147483648, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10674] FCALL ldv_handler_precall() VAL [__this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, ldv_s_vhost_net_fops_file_operations=0, tmp=0, tmp___0=3, tmp___1=2147483648, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10675] CALL vhost_net_compat_ioctl(var_group2, var_vhost_net_compat_ioctl_28_p1, var_vhost_net_compat_ioctl_28_p2) [L10582] void *tmp ; [L10583] long tmp___0 ; [L10585] CALL, EXPR compat_ptr((compat_uptr_t )arg) [L9300] return ((void *)((unsigned long )uptr)); VAL [\old(uptr)=536952832, \result={0:536952832}, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, uptr=536952832, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10585] RET, EXPR compat_ptr((compat_uptr_t )arg) [L10585] tmp = compat_ptr((compat_uptr_t )arg) [L10586] CALL vhost_net_ioctl(f, ioctl, (unsigned long )tmp) VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10521] struct vhost_net *n ; [L10522] void *argp ; [L10523] u64 *featurep ; [L10524] struct vhost_vring_file backend ; [L10525] u64 features ; [L10526] int r ; [L10527] unsigned long tmp ; [L10528] long tmp___0 ; [L10529] int tmp___1 ; [L10530] unsigned long tmp___2 ; [L10531] int tmp___3 ; [L10532] long tmp___4 ; [L10533] long tmp___5 ; [L10535] EXPR f->private_data [L10535] n = (struct vhost_net *)f->private_data [L10536] argp = (void *)arg [L10537] featurep = (u64 *)argp [L10539] case 1074310960U: [L10547] case 2148052736U: [L10555] case 1074310912U: [L10567] case 44802U: [L10568] CALL vhost_net_reset_owner(n) [L10445] struct socket *tx_sock ; [L10446] struct socket *rx_sock ; [L10447] long err ; [L10449] tx_sock = 0 [L10450] rx_sock = 0 [L10451] CALL ldv_mutex_lock_66(& n->dev.mutex) [L10919] CALL ldv_mutex_lock_mutex(ldv_func_arg1) VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, lock={8724154368:1108168671490}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L11361] COND TRUE ldv_mutex_mutex == 1 VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=1, lock={8724154368:1108168671490}, lock={8724154368:1108168671490}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L11365] ldv_mutex_mutex = 2 VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, lock={8724154368:1108168671490}, lock={8724154368:1108168671490}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10919] RET ldv_mutex_lock_mutex(ldv_func_arg1) VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, experimental_zcopytx=0, ldv_func_arg1={8724154368:1108168671490}, ldv_func_arg1={8724154368:1108168671490}, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10920] FCALL mutex_lock(ldv_func_arg1) VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, experimental_zcopytx=0, ldv_func_arg1={8724154368:1108168671490}, ldv_func_arg1={8724154368:1108168671490}, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10451] RET ldv_mutex_lock_66(& n->dev.mutex) [L10452] CALL, EXPR vhost_dev_check_owner(& n->dev) VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, dev={8724154368:1108168671474}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L6410] struct task_struct *tmp ; VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, dev={8724154368:1108168671474}, dev={8724154368:1108168671474}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L6412] CALL, EXPR get_current() VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L5283] struct task_struct *pfo_ret__ ; [L5286] case 1UL: [L5289] case 2UL: [L5292] case 4UL: [L5295] case 8UL: VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L5302] return (pfo_ret__); VAL [\old(ldv_mutex_mutex)=1, \result={0:1048584}, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, pfo_ret__={0:1048584}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L6412] RET, EXPR get_current() VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, dev={8724154368:1108168671474}, dev={8724154368:1108168671474}, experimental_zcopytx=0, get_current()={0:1048584}, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L6412] tmp = get_current() [L6413] EXPR dev->mm [L6413] EXPR tmp->mm VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, dev={8724154368:1108168671474}, dev={8724154368:1108168671474}, dev->mm={576460752303423488:576531121584505376}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, tmp={0:1048584}, tmp->mm={0:1152991873887928864}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L6413] EXPR (unsigned long )dev->mm == (unsigned long )tmp->mm ? 0L : -1L VAL [(unsigned long )dev->mm == (unsigned long )tmp->mm ? 0L : -1L=0, \old(ldv_mutex_mutex)=1, __this_module={0:67108864}, dev={8724154368:1108168671474}, dev={8724154368:1108168671474}, dev->mm={576460752303423488:576531121584505376}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, tmp={0:1048584}, tmp->mm={0:1152991873887928864}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L6413] return ((unsigned long )dev->mm == (unsigned long )tmp->mm ? 0L : -1L); [L10452] RET, EXPR vhost_dev_check_owner(& n->dev) VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, n={8724154368:1108168671474}, n={8724154368:1108168671474}, rx_sock={237:0}, tx_sock={253:0}, vhost_dev_check_owner(& n->dev)=0, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10452] err = vhost_dev_check_owner(& n->dev) [L10453] COND FALSE !(err != 0L) VAL [\old(ldv_mutex_mutex)=1, __this_module={0:67108864}, err=0, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, n={8724154368:1108168671474}, n={8724154368:1108168671474}, rx_sock={237:0}, tx_sock={253:0}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10457] CALL vhost_net_stop(n, & tx_sock, & rx_sock) VAL [\old(ldv_mutex_mutex)=2, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, n={8724154368:1108168671474}, rx_sock={237:0}, tx_sock={253:0}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10183] CALL vhost_net_stop_vq(n, (struct vhost_virtqueue *)(& n->vqs) + 1UL) VAL [\old(ldv_mutex_mutex)=2, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, n={8724154368:1108168671474}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0, vq={8724154368:1108168688890}] [L10155] struct socket *sock ; [L10156] bool __warned ; [L10157] int tmp ; [L10158] int tmp___0 ; [L10160] CALL ldv_mutex_lock_56(& vq->mutex) [L10839] CALL ldv_mutex_lock_mutex(ldv_func_arg1) VAL [\old(ldv_mutex_mutex)=2, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, lock={8724154368:1108168688898}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L11361] COND FALSE !(ldv_mutex_mutex == 1) VAL [\old(ldv_mutex_mutex)=2, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, lock={8724154368:1108168688898}, lock={8724154368:1108168688898}, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L11363] CALL ldv_error() VAL [\old(ldv_mutex_mutex)=2, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] [L10992] reach_error() VAL [\old(ldv_mutex_mutex)=2, __this_module={0:67108864}, experimental_zcopytx=0, LDV_IN_INTERRUPT=1, ldv_mutex_cred_guard_mutex=1, ldv_mutex_lock=1, ldv_mutex_mtx=1, ldv_mutex_mutex=2, vhost_net_fops={215:0}, vhost_net_misc={216:0}, vhost_zcopy_mask=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 105 procedures, 2218 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.6s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13015 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12988 mSDsluCounter, 51099 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 25957 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 82 IncrementalHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 25142 mSDtfsCounter, 82 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 612 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2828occurred in iteration=5, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 8 MinimizatonAttempts, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 6.8s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 382 NumberOfCodeBlocks, 382 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 612 ConstructedInterpolants, 0 QuantifiedInterpolants, 999 SizeOfPredicates, 1 NumberOfNonLiveVariables, 5022 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 20/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 02:09:59,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00095a4d-dd23-4ad0-8896-d416ce8f49b2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample