./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF --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 54849713272284bcfc1d249b79bdfa502d33e8d1537f459c00022c26afd8a94c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:42:43,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:42:43,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:42:44,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:42:44,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:42:44,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:42:44,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:42:44,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:42:44,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:42:44,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:42:44,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:42:44,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:42:44,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:42:44,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:42:44,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:42:44,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:42:44,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:42:44,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:42:44,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:42:44,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:42:44,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:42:44,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:42:44,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:42:44,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:42:44,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:42:44,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:42:44,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:42:44,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:42:44,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:42:44,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:42:44,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:42:44,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:42:44,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:42:44,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:42:44,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:42:44,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:42:44,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:42:44,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:42:44,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:42:44,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:42:44,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:42:44,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:42:44,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:42:44,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:42:44,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:42:44,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:42:44,110 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:42:44,111 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:42:44,111 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:42:44,111 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:42:44,112 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:42:44,112 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:42:44,112 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:42:44,113 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:42:44,113 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:42:44,113 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:42:44,113 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:42:44,114 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:42:44,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:42:44,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:42:44,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:42:44,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:42:44,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:42:44,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:42:44,116 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:42:44,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:42:44,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:42:44,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:42:44,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:42:44,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:42:44,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:42:44,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:42:44,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:42:44,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:42:44,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:42:44,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:42:44,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:42:44,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:42:44,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:42:44,120 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_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54849713272284bcfc1d249b79bdfa502d33e8d1537f459c00022c26afd8a94c [2021-11-12 23:42:44,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:42:44,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:42:44,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:42:44,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:42:44,393 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:42:44,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i [2021-11-12 23:42:44,478 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data/af557e60b/8db7a8f830fa46238e9bdecdf7839b8e/FLAG17c4219be [2021-11-12 23:42:45,485 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:42:45,486 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i [2021-11-12 23:42:45,566 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data/af557e60b/8db7a8f830fa46238e9bdecdf7839b8e/FLAG17c4219be [2021-11-12 23:42:45,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data/af557e60b/8db7a8f830fa46238e9bdecdf7839b8e [2021-11-12 23:42:45,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:42:45,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:42:45,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:45,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:42:45,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:42:45,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:45" (1/1) ... [2021-11-12 23:42:45,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e7b03e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:45, skipping insertion in model container [2021-11-12 23:42:45,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:45" (1/1) ... [2021-11-12 23:42:45,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:42:46,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:42:49,057 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:42:49,081 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:42:49,082 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:42:49,435 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:42:49,604 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:42:49,614 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:42:51,653 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508632,508645] [2021-11-12 23:42:51,661 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508801,508814] [2021-11-12 23:42:51,662 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508968,508981] [2021-11-12 23:42:51,662 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[509136,509149] [2021-11-12 23:42:51,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:42:51,740 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:42:51,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@33766aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:51, skipping insertion in model container [2021-11-12 23:42:51,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:51,741 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:42:51,743 INFO L158 Benchmark]: Toolchain (without parser) took 5787.32ms. Allocated memory was 113.2MB in the beginning and 155.2MB in the end (delta: 41.9MB). Free memory was 78.2MB in the beginning and 73.2MB in the end (delta: 5.0MB). Peak memory consumption was 75.9MB. Max. memory is 16.1GB. [2021-11-12 23:42:51,744 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory is still 90.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:42:51,745 INFO L158 Benchmark]: CACSL2BoogieTranslator took 5784.60ms. Allocated memory was 113.2MB in the beginning and 155.2MB in the end (delta: 41.9MB). Free memory was 77.8MB in the beginning and 73.2MB in the end (delta: 4.6MB). Peak memory consumption was 75.9MB. Max. memory is 16.1GB. [2021-11-12 23:42:51,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory is still 90.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 5784.60ms. Allocated memory was 113.2MB in the beginning and 155.2MB in the end (delta: 41.9MB). Free memory was 77.8MB in the beginning and 73.2MB in the end (delta: 4.6MB). Peak memory consumption was 75.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7067]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF --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 54849713272284bcfc1d249b79bdfa502d33e8d1537f459c00022c26afd8a94c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:42:54,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:42:54,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:42:54,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:42:54,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:42:54,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:42:54,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:42:54,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:42:54,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:42:54,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:42:54,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:42:54,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:42:54,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:42:54,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:42:54,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:42:54,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:42:54,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:42:54,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:42:54,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:42:54,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:42:54,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:42:54,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:42:54,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:42:54,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:42:54,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:42:54,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:42:54,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:42:54,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:42:54,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:42:54,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:42:54,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:42:54,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:42:54,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:42:54,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:42:54,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:42:54,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:42:54,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:42:54,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:42:54,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:42:54,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:42:54,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:42:54,124 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:42:54,166 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:42:54,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:42:54,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:42:54,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:42:54,169 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:42:54,169 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:42:54,169 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:42:54,169 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:42:54,169 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:42:54,170 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:42:54,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:42:54,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:42:54,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:42:54,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:42:54,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:42:54,173 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:42:54,173 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:42:54,174 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:42:54,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:42:54,174 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:42:54,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:42:54,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:42:54,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:42:54,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:42:54,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:42:54,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:42:54,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:42:54,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:42:54,176 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:42:54,176 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:54,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:42:54,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:42:54,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:42:54,177 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_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54849713272284bcfc1d249b79bdfa502d33e8d1537f459c00022c26afd8a94c [2021-11-12 23:42:54,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:42:54,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:42:54,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:42:54,556 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:42:54,557 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:42:54,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i [2021-11-12 23:42:54,633 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data/f2314f7b1/6329168ec4e74bd78456ad5d65e7f3ed/FLAG26dab3319 [2021-11-12 23:42:55,826 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:42:55,827 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i [2021-11-12 23:42:55,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data/f2314f7b1/6329168ec4e74bd78456ad5d65e7f3ed/FLAG26dab3319 [2021-11-12 23:42:56,064 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/data/f2314f7b1/6329168ec4e74bd78456ad5d65e7f3ed [2021-11-12 23:42:56,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:42:56,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:42:56,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:56,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:42:56,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:42:56,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:56" (1/1) ... [2021-11-12 23:42:56,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38fc34e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:56, skipping insertion in model container [2021-11-12 23:42:56,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:56" (1/1) ... [2021-11-12 23:42:56,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:42:56,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:01,797 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508632,508645] [2021-11-12 23:43:01,805 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508801,508814] [2021-11-12 23:43:01,806 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508968,508981] [2021-11-12 23:43:01,807 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[509136,509149] [2021-11-12 23:43:01,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:01,922 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:43:02,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:02,629 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508632,508645] [2021-11-12 23:43:02,629 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508801,508814] [2021-11-12 23:43:02,630 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508968,508981] [2021-11-12 23:43:02,633 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[509136,509149] [2021-11-12 23:43:02,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:02,696 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:43:03,476 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508632,508645] [2021-11-12 23:43:03,477 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508801,508814] [2021-11-12 23:43:03,478 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508968,508981] [2021-11-12 23:43:03,478 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[509136,509149] [2021-11-12 23:43:03,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:03,962 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:43:03,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03 WrapperNode [2021-11-12 23:43:03,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:03,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:43:03,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:43:03,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:43:03,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:43:04,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:43:04,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:43:04,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:43:04,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:43:04,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:43:04,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:43:04,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:43:04,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (1/1) ... [2021-11-12 23:43:04,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:43:04,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:43:04,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:43:05,056 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_93 [2021-11-12 23:43:05,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_93 [2021-11-12 23:43:05,057 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-12 23:43:05,057 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-12 23:43:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure ipv6_hdr [2021-11-12 23:43:05,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ipv6_hdr [2021-11-12 23:43:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_read_phy_core [2021-11-12 23:43:05,058 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_read_phy_core [2021-11-12 23:43:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure device_set_wakeup_enable [2021-11-12 23:43:05,059 INFO L138 BoogieDeclarations]: Found implementation of procedure device_set_wakeup_enable [2021-11-12 23:43:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_post_phy_linkchg [2021-11-12 23:43:05,059 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_post_phy_linkchg [2021-11-12 23:43:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-12 23:43:05,059 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-12 23:43:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:43:05,060 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:43:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_80 [2021-11-12 23:43:05,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_80 [2021-11-12 23:43:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-12 23:43:05,060 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-12 23:43:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:43:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:43:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_clean_rx_ring [2021-11-12 23:43:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_clean_rx_ring [2021-11-12 23:43:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:43:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:43:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-12 23:43:05,062 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-12 23:43:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-12 23:43:05,062 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-12 23:43:05,063 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-12 23:43:05,063 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-12 23:43:05,063 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_read_current_addr [2021-11-12 23:43:05,063 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_read_current_addr [2021-11-12 23:43:05,064 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 23:43:05,064 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 23:43:05,064 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 23:43:05,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 23:43:05,064 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_reset_mac [2021-11-12 23:43:05,065 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_reset_mac [2021-11-12 23:43:05,065 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_irq_disable [2021-11-12 23:43:05,065 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_irq_disable [2021-11-12 23:43:05,065 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_stop_phy_polling [2021-11-12 23:43:05,067 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_stop_phy_polling [2021-11-12 23:43:05,067 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-12 23:43:05,067 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-12 23:43:05,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 23:43:05,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 23:43:05,067 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-12 23:43:05,068 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-12 23:43:05,068 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-12 23:43:05,068 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-12 23:43:05,068 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-12 23:43:05,069 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-12 23:43:05,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 23:43:05,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 23:43:05,069 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-12 23:43:05,069 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-12 23:43:05,070 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-12 23:43:05,071 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-12 23:43:05,071 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2021-11-12 23:43:05,071 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2021-11-12 23:43:05,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:43:05,071 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-12 23:43:05,072 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-12 23:43:05,072 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_speed_and_duplex [2021-11-12 23:43:05,072 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_speed_and_duplex [2021-11-12 23:43:05,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:43:05,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:43:05,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:43:05,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:43:05,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_mdio_lock_of_atl1c_adapter [2021-11-12 23:43:05,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_mdio_lock_of_atl1c_adapter [2021-11-12 23:43:05,073 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-12 23:43:05,074 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-12 23:43:05,074 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_close [2021-11-12 23:43:05,074 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_close [2021-11-12 23:43:05,074 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 23:43:05,075 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 23:43:05,075 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_write_phy_reg [2021-11-12 23:43:05,075 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_write_phy_reg [2021-11-12 23:43:05,075 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_phy_init [2021-11-12 23:43:05,076 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_phy_init [2021-11-12 23:43:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_read_phy_dbg [2021-11-12 23:43:05,076 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_read_phy_dbg [2021-11-12 23:43:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_regs_len [2021-11-12 23:43:05,077 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_regs_len [2021-11-12 23:43:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-12 23:43:05,077 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-12 23:43:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 23:43:05,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 23:43:05,078 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_free_ring_resources [2021-11-12 23:43:05,078 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_free_ring_resources [2021-11-12 23:43:05,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 23:43:05,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 23:43:05,078 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~C_ULONG~X~C_INT~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-12 23:43:05,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~C_ULONG~X~C_INT~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-12 23:43:05,079 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-12 23:43:05,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-12 23:43:05,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:43:05,079 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:43:05,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-12 23:43:05,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-12 23:43:05,080 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-12 23:43:05,082 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-12 23:43:05,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-12 23:43:05,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-12 23:43:05,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-12 23:43:05,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-12 23:43:05,083 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-12 23:43:05,084 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-12 23:43:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_set_multi [2021-11-12 23:43:05,084 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_set_multi [2021-11-12 23:43:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:43:05,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:43:05,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:43:05,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-12 23:43:05,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-12 23:43:05,085 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:43:05,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:43:05,085 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-12 23:43:05,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-12 23:43:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:43:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_start_phy_polling [2021-11-12 23:43:05,086 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_start_phy_polling [2021-11-12 23:43:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_dword [2021-11-12 23:43:05,086 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_dword [2021-11-12 23:43:05,087 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 23:43:05,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:43:05,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:43:05,087 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:43:05,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:43:05,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:43:05,088 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2021-11-12 23:43:05,088 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2021-11-12 23:43:05,088 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2021-11-12 23:43:05,088 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2021-11-12 23:43:05,088 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~X~$Pointer$~TO~VOID [2021-11-12 23:43:05,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~X~$Pointer$~TO~VOID [2021-11-12 23:43:05,089 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_write_phy_core [2021-11-12 23:43:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_write_phy_core [2021-11-12 23:43:05,089 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_wait_until_idle [2021-11-12 23:43:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_wait_until_idle [2021-11-12 23:43:05,089 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-12 23:43:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-12 23:43:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-12 23:43:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-12 23:43:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 23:43:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 23:43:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_check_link_status [2021-11-12 23:43:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_check_link_status [2021-11-12 23:43:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-12 23:43:05,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-12 23:43:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_alloc_rx_buffer [2021-11-12 23:43:05,091 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_alloc_rx_buffer [2021-11-12 23:43:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_mdio_lock_of_atl1c_adapter [2021-11-12 23:43:05,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_mdio_lock_of_atl1c_adapter [2021-11-12 23:43:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_io_resume [2021-11-12 23:43:05,092 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_io_resume [2021-11-12 23:43:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_write_phy_dbg [2021-11-12 23:43:05,092 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_write_phy_dbg [2021-11-12 23:43:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_wait_mdio_idle [2021-11-12 23:43:05,092 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_wait_mdio_idle [2021-11-12 23:43:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-12 23:43:05,093 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-12 23:43:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-12 23:43:05,093 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-12 23:43:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:43:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_vlan_mode [2021-11-12 23:43:05,094 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_vlan_mode [2021-11-12 23:43:05,094 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_tx_buffer [2021-11-12 23:43:05,094 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_tx_buffer [2021-11-12 23:43:05,094 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_down [2021-11-12 23:43:05,094 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_down [2021-11-12 23:43:05,094 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_suspend [2021-11-12 23:43:05,095 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_suspend [2021-11-12 23:43:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:43:05,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:43:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2021-11-12 23:43:05,095 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2021-11-12 23:43:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-12 23:43:05,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-12 23:43:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:43:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-12 23:43:05,096 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-12 23:43:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:43:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:43:05,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:43:05,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:43:05,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:43:05,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:43:05,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:43:05,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:43:05,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:43:05,098 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-12 23:43:05,098 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-12 23:43:05,098 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_try [2021-11-12 23:43:05,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_try [2021-11-12 23:43:05,098 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_tx_timeout [2021-11-12 23:43:05,099 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_tx_timeout [2021-11-12 23:43:05,099 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-12 23:43:05,099 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-12 23:43:05,099 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-12 23:43:05,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-12 23:43:05,099 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_tpd [2021-11-12 23:43:05,099 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_tpd [2021-11-12 23:43:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_hw_set_mac_addr [2021-11-12 23:43:05,100 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_hw_set_mac_addr [2021-11-12 23:43:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-12 23:43:05,100 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-12 23:43:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure ip_hdr [2021-11-12 23:43:05,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ip_hdr [2021-11-12 23:43:05,101 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-12 23:43:05,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-12 23:43:05,101 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_restart_autoneg [2021-11-12 23:43:05,101 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_restart_autoneg [2021-11-12 23:43:05,101 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_set_rxbufsize [2021-11-12 23:43:05,101 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_set_rxbufsize [2021-11-12 23:43:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-12 23:43:05,102 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-12 23:43:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:43:05,102 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:43:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_free_irq [2021-11-12 23:43:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_free_irq [2021-11-12 23:43:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_post_probe [2021-11-12 23:43:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_post_probe [2021-11-12 23:43:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_write_phy_ext [2021-11-12 23:43:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_write_phy_ext [2021-11-12 23:43:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-12 23:43:05,104 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-12 23:43:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-12 23:43:05,104 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-12 23:43:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:43:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2021-11-12 23:43:05,104 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2021-11-12 23:43:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_nway_reset [2021-11-12 23:43:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_nway_reset [2021-11-12 23:43:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_reset_dma_ring [2021-11-12 23:43:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_reset_dma_ring [2021-11-12 23:43:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-12 23:43:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-12 23:43:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:43:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_irq_enable [2021-11-12 23:43:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_irq_enable [2021-11-12 23:43:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2021-11-12 23:43:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2021-11-12 23:43:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:43:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:43:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_eeprom_len [2021-11-12 23:43:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_eeprom_len [2021-11-12 23:43:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:43:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:43:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:43:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pre_probe [2021-11-12 23:43:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pre_probe [2021-11-12 23:43:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_check_eeprom_exist [2021-11-12 23:43:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_check_eeprom_exist [2021-11-12 23:43:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-12 23:43:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-12 23:43:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-12 23:43:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-12 23:43:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_netpoll [2021-11-12 23:43:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_netpoll [2021-11-12 23:43:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 23:43:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 23:43:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 23:43:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 23:43:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-12 23:43:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-12 23:43:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_configure [2021-11-12 23:43:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_configure [2021-11-12 23:43:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_dword [2021-11-12 23:43:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_dword [2021-11-12 23:43:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_85 [2021-11-12 23:43:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_85 [2021-11-12 23:43:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_clean_tx_ring [2021-11-12 23:43:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_clean_tx_ring [2021-11-12 23:43:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_phy_reset [2021-11-12 23:43:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_phy_reset [2021-11-12 23:43:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_open [2021-11-12 23:43:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_open [2021-11-12 23:43:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-12 23:43:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-12 23:43:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 23:43:05,113 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 23:43:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2021-11-12 23:43:05,113 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2021-11-12 23:43:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_offset [2021-11-12 23:43:05,113 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_offset [2021-11-12 23:43:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:43:05,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:43:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_intr [2021-11-12 23:43:05,114 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_intr [2021-11-12 23:43:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-12 23:43:05,114 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-12 23:43:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_power_saving [2021-11-12 23:43:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_power_saving [2021-11-12 23:43:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_phy_setup_adv [2021-11-12 23:43:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_phy_setup_adv [2021-11-12 23:43:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-12 23:43:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-12 23:43:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:43:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:43:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_clean_buffer [2021-11-12 23:43:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_clean_buffer [2021-11-12 23:43:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_remove [2021-11-12 23:43:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_remove [2021-11-12 23:43:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:43:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:43:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:43:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:43:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:43:05,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:43:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_86 [2021-11-12 23:43:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_86 [2021-11-12 23:43:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-12 23:43:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-12 23:43:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-12 23:43:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-12 23:43:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_up [2021-11-12 23:43:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_up [2021-11-12 23:43:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-12 23:43:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-12 23:43:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_disable_l0s_l1 [2021-11-12 23:43:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_disable_l0s_l1 [2021-11-12 23:43:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_resume [2021-11-12 23:43:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_resume [2021-11-12 23:43:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdrlen [2021-11-12 23:43:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdrlen [2021-11-12 23:43:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_reset_pcie [2021-11-12 23:43:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_reset_pcie [2021-11-12 23:43:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 23:43:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 23:43:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-12 23:43:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-12 23:43:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_shutdown [2021-11-12 23:43:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_shutdown [2021-11-12 23:43:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_set_aspm [2021-11-12 23:43:05,122 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_set_aspm [2021-11-12 23:43:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-12 23:43:05,122 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-12 23:43:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2021-11-12 23:43:05,122 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2021-11-12 23:43:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-12 23:43:05,123 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-12 23:43:05,123 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_read_phy_reg [2021-11-12 23:43:05,123 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_read_phy_reg [2021-11-12 23:43:05,123 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 23:43:05,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 23:43:07,240 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:44:05,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:44:05,585 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:44:05,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:44:05 BoogieIcfgContainer [2021-11-12 23:44:05,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:44:05,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:44:05,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:44:05,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:44:05,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:42:56" (1/3) ... [2021-11-12 23:44:05,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e2cac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:44:05, skipping insertion in model container [2021-11-12 23:44:05,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:03" (2/3) ... [2021-11-12 23:44:05,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e2cac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:44:05, skipping insertion in model container [2021-11-12 23:44:05,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:44:05" (3/3) ... [2021-11-12 23:44:05,602 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i [2021-11-12 23:44:05,607 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:44:05,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-12 23:44:05,696 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:44:05,706 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 [2021-11-12 23:44:05,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-12 23:44:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 3738 states, 2494 states have (on average 1.2489975942261426) internal successors, (3115), 2549 states have internal predecessors, (3115), 1081 states have call successors, (1081), 159 states have call predecessors, (1081), 158 states have return successors, (1074), 1065 states have call predecessors, (1074), 1074 states have call successors, (1074) [2021-11-12 23:44:05,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 23:44:05,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:05,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:05,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:44:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash 641900107, now seen corresponding path program 1 times [2021-11-12 23:44:05,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:05,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436080884] [2021-11-12 23:44:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:05,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:05,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:05,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:05,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:44:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:09,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:09,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:09,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:10,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:10,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436080884] [2021-11-12 23:44:10,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436080884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:10,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:44:10,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-12 23:44:10,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563863471] [2021-11-12 23:44:10,224 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:10,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:44:10,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:10,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:44:10,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:44:10,265 INFO L87 Difference]: Start difference. First operand has 3738 states, 2494 states have (on average 1.2489975942261426) internal successors, (3115), 2549 states have internal predecessors, (3115), 1081 states have call successors, (1081), 159 states have call predecessors, (1081), 158 states have return successors, (1074), 1065 states have call predecessors, (1074), 1074 states have call successors, (1074) Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:44:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:11,102 INFO L93 Difference]: Finished difference Result 7449 states and 10625 transitions. [2021-11-12 23:44:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:11,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 48 [2021-11-12 23:44:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:11,169 INFO L225 Difference]: With dead ends: 7449 [2021-11-12 23:44:11,169 INFO L226 Difference]: Without dead ends: 3723 [2021-11-12 23:44:11,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:44:11,212 INFO L933 BasicCegarLoop]: 5246 mSDtfsCounter, 5209 mSDsluCounter, 15720 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5225 SdHoareTripleChecker+Valid, 20966 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 93.14ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:11,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5225 Valid, 20966 Invalid, 28 Unknown, 0 Unchecked, 93.14ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 166.63ms Time] [2021-11-12 23:44:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2021-11-12 23:44:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3723. [2021-11-12 23:44:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 2487 states have (on average 1.241254523522316) internal successors, (3087), 2538 states have internal predecessors, (3087), 1074 states have call successors, (1074), 159 states have call predecessors, (1074), 158 states have return successors, (1071), 1062 states have call predecessors, (1071), 1071 states have call successors, (1071) [2021-11-12 23:44:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5232 transitions. [2021-11-12 23:44:11,659 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5232 transitions. Word has length 48 [2021-11-12 23:44:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:11,661 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 5232 transitions. [2021-11-12 23:44:11,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:44:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5232 transitions. [2021-11-12 23:44:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-12 23:44:11,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:11,666 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:11,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:11,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:11,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:44:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:11,868 INFO L85 PathProgramCache]: Analyzing trace with hash 802517195, now seen corresponding path program 1 times [2021-11-12 23:44:11,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:11,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915008059] [2021-11-12 23:44:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:11,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:11,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:11,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:11,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:44:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:14,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:15,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:16,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:16,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915008059] [2021-11-12 23:44:16,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915008059] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:16,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:16,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:44:16,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812489987] [2021-11-12 23:44:16,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:16,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:16,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:16,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:44:16,099 INFO L87 Difference]: Start difference. First operand 3723 states and 5232 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:44:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:16,695 INFO L93 Difference]: Finished difference Result 3729 states and 5237 transitions. [2021-11-12 23:44:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2021-11-12 23:44:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:16,731 INFO L225 Difference]: With dead ends: 3729 [2021-11-12 23:44:16,731 INFO L226 Difference]: Without dead ends: 3727 [2021-11-12 23:44:16,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:44:16,736 INFO L933 BasicCegarLoop]: 5229 mSDtfsCounter, 5197 mSDsluCounter, 10435 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5211 SdHoareTripleChecker+Valid, 15664 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.83ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:16,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5211 Valid, 15664 Invalid, 24 Unknown, 0 Unchecked, 48.83ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 129.05ms Time] [2021-11-12 23:44:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-11-12 23:44:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3727. [2021-11-12 23:44:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 2490 states have (on average 1.2409638554216869) internal successors, (3090), 2541 states have internal predecessors, (3090), 1074 states have call successors, (1074), 160 states have call predecessors, (1074), 159 states have return successors, (1071), 1062 states have call predecessors, (1071), 1071 states have call successors, (1071) [2021-11-12 23:44:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5235 transitions. [2021-11-12 23:44:17,160 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5235 transitions. Word has length 53 [2021-11-12 23:44:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:17,161 INFO L470 AbstractCegarLoop]: Abstraction has 3727 states and 5235 transitions. [2021-11-12 23:44:17,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:44:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5235 transitions. [2021-11-12 23:44:17,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:44:17,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:17,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:17,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:44:17,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:17,393 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:44:17,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:17,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2051062261, now seen corresponding path program 1 times [2021-11-12 23:44:17,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:17,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039338699] [2021-11-12 23:44:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:17,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:17,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:17,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:44:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:20,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:20,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:44:21,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:44:21,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:21,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039338699] [2021-11-12 23:44:21,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039338699] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:21,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:21,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:44:21,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917226294] [2021-11-12 23:44:21,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:21,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:21,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:44:21,476 INFO L87 Difference]: Start difference. First operand 3727 states and 5235 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:44:22,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:22,002 INFO L93 Difference]: Finished difference Result 3733 states and 5240 transitions. [2021-11-12 23:44:22,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:22,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2021-11-12 23:44:22,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:22,039 INFO L225 Difference]: With dead ends: 3733 [2021-11-12 23:44:22,040 INFO L226 Difference]: Without dead ends: 3731 [2021-11-12 23:44:22,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:44:22,046 INFO L933 BasicCegarLoop]: 5229 mSDtfsCounter, 5197 mSDsluCounter, 10435 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5210 SdHoareTripleChecker+Valid, 15664 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:22,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5210 Valid, 15664 Invalid, 24 Unknown, 0 Unchecked, 42.90ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 126.54ms Time] [2021-11-12 23:44:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-11-12 23:44:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3731. [2021-11-12 23:44:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 2493 states have (on average 1.2406738868832732) internal successors, (3093), 2544 states have internal predecessors, (3093), 1074 states have call successors, (1074), 161 states have call predecessors, (1074), 160 states have return successors, (1071), 1062 states have call predecessors, (1071), 1071 states have call successors, (1071) [2021-11-12 23:44:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5238 transitions. [2021-11-12 23:44:22,347 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5238 transitions. Word has length 58 [2021-11-12 23:44:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:22,348 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5238 transitions. [2021-11-12 23:44:22,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:44:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5238 transitions. [2021-11-12 23:44:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 23:44:22,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:22,353 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:22,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:22,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:22,569 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:44:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1594216587, now seen corresponding path program 1 times [2021-11-12 23:44:22,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:22,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518327789] [2021-11-12 23:44:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:22,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:22,573 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:22,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:44:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:25,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:44:26,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:44:26,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:26,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518327789] [2021-11-12 23:44:26,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518327789] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:26,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:26,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:44:26,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728843056] [2021-11-12 23:44:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:26,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:26,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:44:26,571 INFO L87 Difference]: Start difference. First operand 3731 states and 5238 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:44:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:27,195 INFO L93 Difference]: Finished difference Result 3737 states and 5243 transitions. [2021-11-12 23:44:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 63 [2021-11-12 23:44:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:27,233 INFO L225 Difference]: With dead ends: 3737 [2021-11-12 23:44:27,233 INFO L226 Difference]: Without dead ends: 3735 [2021-11-12 23:44:27,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:44:27,238 INFO L933 BasicCegarLoop]: 5229 mSDtfsCounter, 5197 mSDsluCounter, 10435 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5209 SdHoareTripleChecker+Valid, 15664 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:27,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5209 Valid, 15664 Invalid, 24 Unknown, 0 Unchecked, 33.76ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 135.59ms Time] [2021-11-12 23:44:27,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2021-11-12 23:44:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 3735. [2021-11-12 23:44:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 2496 states have (on average 1.2403846153846154) internal successors, (3096), 2547 states have internal predecessors, (3096), 1074 states have call successors, (1074), 162 states have call predecessors, (1074), 161 states have return successors, (1071), 1062 states have call predecessors, (1071), 1071 states have call successors, (1071) [2021-11-12 23:44:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 5241 transitions. [2021-11-12 23:44:27,526 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 5241 transitions. Word has length 63 [2021-11-12 23:44:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:27,526 INFO L470 AbstractCegarLoop]: Abstraction has 3735 states and 5241 transitions. [2021-11-12 23:44:27,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:44:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 5241 transitions. [2021-11-12 23:44:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:44:27,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:27,529 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:27,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:27,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:27,745 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:44:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:27,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1194398261, now seen corresponding path program 1 times [2021-11-12 23:44:27,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:27,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413846443] [2021-11-12 23:44:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:27,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:27,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:27,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:27,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:44:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:30,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:30,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:44:31,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:44:31,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:31,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413846443] [2021-11-12 23:44:31,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413846443] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:31,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:31,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:44:31,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115680034] [2021-11-12 23:44:31,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:31,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:31,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:44:31,687 INFO L87 Difference]: Start difference. First operand 3735 states and 5241 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:44:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:32,189 INFO L93 Difference]: Finished difference Result 3741 states and 5246 transitions. [2021-11-12 23:44:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 68 [2021-11-12 23:44:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:32,220 INFO L225 Difference]: With dead ends: 3741 [2021-11-12 23:44:32,221 INFO L226 Difference]: Without dead ends: 3739 [2021-11-12 23:44:32,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:44:32,225 INFO L933 BasicCegarLoop]: 5229 mSDtfsCounter, 5197 mSDsluCounter, 10435 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5208 SdHoareTripleChecker+Valid, 15664 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.92ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:32,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5208 Valid, 15664 Invalid, 24 Unknown, 0 Unchecked, 28.92ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 116.60ms Time] [2021-11-12 23:44:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-11-12 23:44:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3739. [2021-11-12 23:44:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 2499 states have (on average 1.240096038415366) internal successors, (3099), 2550 states have internal predecessors, (3099), 1074 states have call successors, (1074), 163 states have call predecessors, (1074), 162 states have return successors, (1071), 1062 states have call predecessors, (1071), 1071 states have call successors, (1071) [2021-11-12 23:44:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 5244 transitions. [2021-11-12 23:44:32,626 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 5244 transitions. Word has length 68 [2021-11-12 23:44:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:32,627 INFO L470 AbstractCegarLoop]: Abstraction has 3739 states and 5244 transitions. [2021-11-12 23:44:32,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:44:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 5244 transitions. [2021-11-12 23:44:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:44:32,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:32,629 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:32,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:32,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:32,848 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:44:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash 541092142, now seen corresponding path program 1 times [2021-11-12 23:44:32,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:32,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742733380] [2021-11-12 23:44:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:32,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:32,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:32,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:32,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:44:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:35,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:44:35,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-12 23:44:37,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 23:44:38,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:38,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742733380] [2021-11-12 23:44:38,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742733380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:38,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [403106870] [2021-11-12 23:44:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:38,649 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:38,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:44:38,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:44:38,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:44:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:40,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:40,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 23:44:41,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 23:44:42,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [403106870] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:42,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:44:42,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:44:42,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003468190] [2021-11-12 23:44:42,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:42,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:42,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:44:42,508 INFO L87 Difference]: Start difference. First operand 3739 states and 5244 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:44:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:43,270 INFO L93 Difference]: Finished difference Result 3745 states and 5249 transitions. [2021-11-12 23:44:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:43,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-12 23:44:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:43,301 INFO L225 Difference]: With dead ends: 3745 [2021-11-12 23:44:43,302 INFO L226 Difference]: Without dead ends: 3743 [2021-11-12 23:44:43,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:44:43,307 INFO L933 BasicCegarLoop]: 5229 mSDtfsCounter, 5187 mSDsluCounter, 10435 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5197 SdHoareTripleChecker+Valid, 15664 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:43,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5197 Valid, 15664 Invalid, 24 Unknown, 0 Unchecked, 27.59ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 141.99ms Time] [2021-11-12 23:44:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-11-12 23:44:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3743. [2021-11-12 23:44:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 2502 states have (on average 1.2398081534772183) internal successors, (3102), 2553 states have internal predecessors, (3102), 1074 states have call successors, (1074), 164 states have call predecessors, (1074), 163 states have return successors, (1071), 1062 states have call predecessors, (1071), 1071 states have call successors, (1071) [2021-11-12 23:44:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 5247 transitions. [2021-11-12 23:44:43,606 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 5247 transitions. Word has length 86 [2021-11-12 23:44:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:43,607 INFO L470 AbstractCegarLoop]: Abstraction has 3743 states and 5247 transitions. [2021-11-12 23:44:43,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:44:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 5247 transitions. [2021-11-12 23:44:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 23:44:43,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:43,609 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:43,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:43,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:44,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:44,022 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:44:44,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1548642933, now seen corresponding path program 1 times [2021-11-12 23:44:44,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:44,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805042862] [2021-11-12 23:44:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:44,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:44,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:44,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:44,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:44:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-12 23:44:47,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-12 23:44:48,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:48,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805042862] [2021-11-12 23:44:48,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805042862] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:48,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:48,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:44:48,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511004484] [2021-11-12 23:44:48,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:48,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:48,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:48,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:48,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:44:48,221 INFO L87 Difference]: Start difference. First operand 3743 states and 5247 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:44:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:48,752 INFO L93 Difference]: Finished difference Result 3749 states and 5252 transitions. [2021-11-12 23:44:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 78 [2021-11-12 23:44:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:48,803 INFO L225 Difference]: With dead ends: 3749 [2021-11-12 23:44:48,803 INFO L226 Difference]: Without dead ends: 3747 [2021-11-12 23:44:48,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:44:48,807 INFO L933 BasicCegarLoop]: 5229 mSDtfsCounter, 5197 mSDsluCounter, 10435 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5206 SdHoareTripleChecker+Valid, 15664 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:48,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5206 Valid, 15664 Invalid, 24 Unknown, 0 Unchecked, 29.60ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 109.35ms Time] [2021-11-12 23:44:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2021-11-12 23:44:49,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3747. [2021-11-12 23:44:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 2505 states have (on average 1.2395209580838322) internal successors, (3105), 2556 states have internal predecessors, (3105), 1074 states have call successors, (1074), 165 states have call predecessors, (1074), 164 states have return successors, (1071), 1062 states have call predecessors, (1071), 1071 states have call successors, (1071) [2021-11-12 23:44:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 5250 transitions. [2021-11-12 23:44:49,116 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 5250 transitions. Word has length 78 [2021-11-12 23:44:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:49,117 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 5250 transitions. [2021-11-12 23:44:49,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:44:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 5250 transitions. [2021-11-12 23:44:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:44:49,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:49,126 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:49,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:49,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:49,341 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:44:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:49,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1183889106, now seen corresponding path program 1 times [2021-11-12 23:44:49,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:49,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436249009] [2021-11-12 23:44:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:49,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:49,346 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:49,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:44:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:52,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:44:52,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 23:44:53,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:44:54,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:54,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436249009] [2021-11-12 23:44:54,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436249009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:54,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [211229905] [2021-11-12 23:44:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:54,894 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:54,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:44:54,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:44:54,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:44:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:56,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:44:57,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:44:58,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [211229905] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:58,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:44:58,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:44:58,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344348353] [2021-11-12 23:44:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:58,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:58,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:44:58,787 INFO L87 Difference]: Start difference. First operand 3747 states and 5250 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:44:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:59,560 INFO L93 Difference]: Finished difference Result 3753 states and 5255 transitions. [2021-11-12 23:44:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:59,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 96 [2021-11-12 23:44:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:59,578 INFO L225 Difference]: With dead ends: 3753 [2021-11-12 23:44:59,578 INFO L226 Difference]: Without dead ends: 3751 [2021-11-12 23:44:59,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:44:59,582 INFO L933 BasicCegarLoop]: 5229 mSDtfsCounter, 5187 mSDsluCounter, 10435 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5195 SdHoareTripleChecker+Valid, 15664 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:59,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5195 Valid, 15664 Invalid, 24 Unknown, 0 Unchecked, 27.65ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 108.31ms Time] [2021-11-12 23:44:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2021-11-12 23:44:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 3751. [2021-11-12 23:44:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 2508 states have (on average 1.2392344497607655) internal successors, (3108), 2559 states have internal predecessors, (3108), 1074 states have call successors, (1074), 166 states have call predecessors, (1074), 165 states have return successors, (1071), 1062 states have call predecessors, (1071), 1071 states have call successors, (1071) [2021-11-12 23:44:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 5253 transitions. [2021-11-12 23:44:59,889 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 5253 transitions. Word has length 96 [2021-11-12 23:44:59,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:59,890 INFO L470 AbstractCegarLoop]: Abstraction has 3751 states and 5253 transitions. [2021-11-12 23:44:59,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:44:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 5253 transitions. [2021-11-12 23:44:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:44:59,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:59,893 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:59,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:00,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:00,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:00,317 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:45:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash -626574005, now seen corresponding path program 1 times [2021-11-12 23:45:00,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:00,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876027053] [2021-11-12 23:45:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:00,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:00,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:00,321 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:00,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:45:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:03,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:03,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:45:03,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:45:04,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:04,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876027053] [2021-11-12 23:45:04,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876027053] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:04,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:04,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:04,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896328585] [2021-11-12 23:45:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:04,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:04,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:04,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:04,418 INFO L87 Difference]: Start difference. First operand 3751 states and 5253 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:45:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:05,009 INFO L93 Difference]: Finished difference Result 3928 states and 5481 transitions. [2021-11-12 23:45:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:05,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2021-11-12 23:45:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:05,027 INFO L225 Difference]: With dead ends: 3928 [2021-11-12 23:45:05,027 INFO L226 Difference]: Without dead ends: 3926 [2021-11-12 23:45:05,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:45:05,031 INFO L933 BasicCegarLoop]: 5380 mSDtfsCounter, 5106 mSDsluCounter, 11049 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5113 SdHoareTripleChecker+Valid, 16429 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.54ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:05,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5113 Valid, 16429 Invalid, 26 Unknown, 0 Unchecked, 50.54ms Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 125.08ms Time] [2021-11-12 23:45:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-11-12 23:45:05,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3924. [2021-11-12 23:45:05,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 2632 states have (on average 1.2420212765957446) internal successors, (3269), 2684 states have internal predecessors, (3269), 1106 states have call successors, (1106), 183 states have call predecessors, (1106), 182 states have return successors, (1103), 1094 states have call predecessors, (1103), 1103 states have call successors, (1103) [2021-11-12 23:45:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 5478 transitions. [2021-11-12 23:45:05,448 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 5478 transitions. Word has length 88 [2021-11-12 23:45:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:05,449 INFO L470 AbstractCegarLoop]: Abstraction has 3924 states and 5478 transitions. [2021-11-12 23:45:05,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:45:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 5478 transitions. [2021-11-12 23:45:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:45:05,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:05,452 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:05,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:05,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:05,673 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:45:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:05,673 INFO L85 PathProgramCache]: Analyzing trace with hash -312152117, now seen corresponding path program 1 times [2021-11-12 23:45:05,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:05,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969084103] [2021-11-12 23:45:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:05,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:05,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:05,678 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:05,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:45:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:08,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:08,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-12 23:45:09,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-12 23:45:09,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:09,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969084103] [2021-11-12 23:45:09,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969084103] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:09,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:09,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:09,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7893916] [2021-11-12 23:45:09,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:09,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:09,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:09,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:09,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:09,855 INFO L87 Difference]: Start difference. First operand 3924 states and 5478 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:45:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:10,385 INFO L93 Difference]: Finished difference Result 3930 states and 5483 transitions. [2021-11-12 23:45:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2021-11-12 23:45:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:10,402 INFO L225 Difference]: With dead ends: 3930 [2021-11-12 23:45:10,402 INFO L226 Difference]: Without dead ends: 3928 [2021-11-12 23:45:10,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:45:10,406 INFO L933 BasicCegarLoop]: 5229 mSDtfsCounter, 5197 mSDsluCounter, 10435 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5203 SdHoareTripleChecker+Valid, 15664 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:10,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5203 Valid, 15664 Invalid, 24 Unknown, 0 Unchecked, 28.31ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 108.40ms Time] [2021-11-12 23:45:10,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-11-12 23:45:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3928. [2021-11-12 23:45:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 2635 states have (on average 1.2417457305502846) internal successors, (3272), 2687 states have internal predecessors, (3272), 1106 states have call successors, (1106), 184 states have call predecessors, (1106), 183 states have return successors, (1103), 1094 states have call predecessors, (1103), 1103 states have call successors, (1103) [2021-11-12 23:45:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5481 transitions. [2021-11-12 23:45:10,813 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5481 transitions. Word has length 93 [2021-11-12 23:45:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:10,813 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 5481 transitions. [2021-11-12 23:45:10,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:45:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5481 transitions. [2021-11-12 23:45:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:45:10,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:10,817 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:10,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:11,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:11,033 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:45:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:11,033 INFO L85 PathProgramCache]: Analyzing trace with hash 750150024, now seen corresponding path program 1 times [2021-11-12 23:45:11,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:11,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363364936] [2021-11-12 23:45:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:11,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:11,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:11,038 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:11,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:45:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:13,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:45:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-12 23:45:15,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-12 23:45:16,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:16,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363364936] [2021-11-12 23:45:16,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363364936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:45:16,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [124493876] [2021-11-12 23:45:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:16,624 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:45:16,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:45:16,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:45:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:18,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-12 23:45:19,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-12 23:45:20,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [124493876] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:20,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:45:20,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:45:20,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375383625] [2021-11-12 23:45:20,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:20,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:20,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:20,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:20,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:45:20,748 INFO L87 Difference]: Start difference. First operand 3928 states and 5481 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:45:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:21,475 INFO L93 Difference]: Finished difference Result 3934 states and 5486 transitions. [2021-11-12 23:45:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2021-11-12 23:45:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:21,491 INFO L225 Difference]: With dead ends: 3934 [2021-11-12 23:45:21,492 INFO L226 Difference]: Without dead ends: 3932 [2021-11-12 23:45:21,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:45:21,496 INFO L933 BasicCegarLoop]: 5229 mSDtfsCounter, 5187 mSDsluCounter, 10435 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5192 SdHoareTripleChecker+Valid, 15664 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:21,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5192 Valid, 15664 Invalid, 24 Unknown, 0 Unchecked, 24.43ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 105.82ms Time] [2021-11-12 23:45:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-11-12 23:45:21,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3932. [2021-11-12 23:45:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 2638 states have (on average 1.2414708112206216) internal successors, (3275), 2690 states have internal predecessors, (3275), 1106 states have call successors, (1106), 185 states have call predecessors, (1106), 184 states have return successors, (1103), 1094 states have call predecessors, (1103), 1103 states have call successors, (1103) [2021-11-12 23:45:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 5484 transitions. [2021-11-12 23:45:21,955 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 5484 transitions. Word has length 111 [2021-11-12 23:45:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:21,955 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 5484 transitions. [2021-11-12 23:45:21,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:45:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 5484 transitions. [2021-11-12 23:45:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:45:21,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:21,959 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:22,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:22,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:22,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:22,381 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:45:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1881900380, now seen corresponding path program 1 times [2021-11-12 23:45:22,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:22,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754128765] [2021-11-12 23:45:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:22,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:22,387 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:22,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:45:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:25,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:45:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 87 proven. 3 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:45:27,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-12 23:45:28,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:28,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754128765] [2021-11-12 23:45:28,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754128765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:45:28,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1133656917] [2021-11-12 23:45:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:28,409 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:45:28,410 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:45:28,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:45:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:32,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:45:32,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-12 23:45:33,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-12 23:45:34,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1133656917] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:34,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:45:34,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [15, 15] total 26 [2021-11-12 23:45:34,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749618465] [2021-11-12 23:45:34,935 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:34,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:45:34,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:45:34,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:45:34,937 INFO L87 Difference]: Start difference. First operand 3932 states and 5484 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:45:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:35,646 INFO L93 Difference]: Finished difference Result 4187 states and 5777 transitions. [2021-11-12 23:45:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:35,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 131 [2021-11-12 23:45:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:35,664 INFO L225 Difference]: With dead ends: 4187 [2021-11-12 23:45:35,664 INFO L226 Difference]: Without dead ends: 3940 [2021-11-12 23:45:35,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:45:35,667 INFO L933 BasicCegarLoop]: 5233 mSDtfsCounter, 26 mSDsluCounter, 31332 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36565 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:35,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 36565 Invalid, 15 Unknown, 0 Unchecked, 50.47ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 96.61ms Time] [2021-11-12 23:45:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3940 states. [2021-11-12 23:45:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3940 to 3932. [2021-11-12 23:45:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 2638 states have (on average 1.2410917361637603) internal successors, (3274), 2689 states have internal predecessors, (3274), 1106 states have call successors, (1106), 185 states have call predecessors, (1106), 184 states have return successors, (1103), 1094 states have call predecessors, (1103), 1103 states have call successors, (1103) [2021-11-12 23:45:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 5483 transitions. [2021-11-12 23:45:35,968 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 5483 transitions. Word has length 131 [2021-11-12 23:45:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:35,969 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 5483 transitions. [2021-11-12 23:45:35,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:45:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 5483 transitions. [2021-11-12 23:45:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:45:35,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:35,972 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:36,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:36,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:36,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:36,385 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:45:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1669208366, now seen corresponding path program 1 times [2021-11-12 23:45:36,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:36,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833123126] [2021-11-12 23:45:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:36,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:36,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:36,388 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:36,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:45:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:39,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:45:39,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-12 23:45:40,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-12 23:45:41,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:41,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833123126] [2021-11-12 23:45:41,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833123126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:45:41,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1862938661] [2021-11-12 23:45:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:41,999 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:45:42,010 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:45:42,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:45:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:43,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-12 23:45:45,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-12 23:45:46,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1862938661] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:46,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:45:46,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:45:46,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857701770] [2021-11-12 23:45:46,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:46,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:46,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:46,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:45:46,112 INFO L87 Difference]: Start difference. First operand 3932 states and 5483 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:45:46,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:46,918 INFO L93 Difference]: Finished difference Result 3938 states and 5488 transitions. [2021-11-12 23:45:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:46,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 116 [2021-11-12 23:45:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:46,934 INFO L225 Difference]: With dead ends: 3938 [2021-11-12 23:45:46,935 INFO L226 Difference]: Without dead ends: 3936 [2021-11-12 23:45:46,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:45:46,938 INFO L933 BasicCegarLoop]: 5228 mSDtfsCounter, 5186 mSDsluCounter, 10433 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5190 SdHoareTripleChecker+Valid, 15661 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.32ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:46,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5190 Valid, 15661 Invalid, 24 Unknown, 0 Unchecked, 21.32ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 105.10ms Time] [2021-11-12 23:45:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-11-12 23:45:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3936. [2021-11-12 23:45:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 2641 states have (on average 1.2408178720181748) internal successors, (3277), 2692 states have internal predecessors, (3277), 1106 states have call successors, (1106), 186 states have call predecessors, (1106), 185 states have return successors, (1103), 1094 states have call predecessors, (1103), 1103 states have call successors, (1103) [2021-11-12 23:45:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 5486 transitions. [2021-11-12 23:45:47,303 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 5486 transitions. Word has length 116 [2021-11-12 23:45:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:47,304 INFO L470 AbstractCegarLoop]: Abstraction has 3936 states and 5486 transitions. [2021-11-12 23:45:47,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:45:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 5486 transitions. [2021-11-12 23:45:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 23:45:47,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:47,307 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:47,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:47,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:47,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:47,721 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:45:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash -507480071, now seen corresponding path program 1 times [2021-11-12 23:45:47,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:47,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162238139] [2021-11-12 23:45:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:47,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:47,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:47,725 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:47,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:45:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:50,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1761 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:45:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 87 proven. 3 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:45:52,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-12 23:45:53,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:53,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162238139] [2021-11-12 23:45:53,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162238139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:45:53,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1927937606] [2021-11-12 23:45:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:53,423 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:45:53,426 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:45:53,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:45:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1761 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:45:59,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-12 23:46:00,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-12 23:46:01,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1927937606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:01,837 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:46:01,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [15, 15] total 23 [2021-11-12 23:46:01,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295260176] [2021-11-12 23:46:01,838 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:01,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:46:01,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:46:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:46:01,840 INFO L87 Difference]: Start difference. First operand 3936 states and 5486 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 23:46:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:02,396 INFO L93 Difference]: Finished difference Result 3938 states and 5487 transitions. [2021-11-12 23:46:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:46:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 135 [2021-11-12 23:46:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:02,410 INFO L225 Difference]: With dead ends: 3938 [2021-11-12 23:46:02,410 INFO L226 Difference]: Without dead ends: 3936 [2021-11-12 23:46:02,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:46:02,414 INFO L933 BasicCegarLoop]: 5374 mSDtfsCounter, 5065 mSDsluCounter, 16430 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5066 SdHoareTripleChecker+Valid, 21804 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.40ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:02,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5066 Valid, 21804 Invalid, 8 Unknown, 0 Unchecked, 24.40ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 30.64ms Time] [2021-11-12 23:46:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-11-12 23:46:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3934. [2021-11-12 23:46:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3934 states, 2640 states have (on average 1.240530303030303) internal successors, (3275), 2690 states have internal predecessors, (3275), 1106 states have call successors, (1106), 186 states have call predecessors, (1106), 185 states have return successors, (1103), 1094 states have call predecessors, (1103), 1103 states have call successors, (1103) [2021-11-12 23:46:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 5484 transitions. [2021-11-12 23:46:02,792 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 5484 transitions. Word has length 135 [2021-11-12 23:46:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:02,793 INFO L470 AbstractCegarLoop]: Abstraction has 3934 states and 5484 transitions. [2021-11-12 23:46:02,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 23:46:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 5484 transitions. [2021-11-12 23:46:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 23:46:02,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:02,796 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:02,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:03,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-12 23:46:03,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:03,209 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:46:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:03,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1286450936, now seen corresponding path program 1 times [2021-11-12 23:46:03,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:03,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779560116] [2021-11-12 23:46:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:03,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:03,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:03,214 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:03,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:46:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:46:05,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-12 23:46:07,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-12 23:46:08,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:08,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779560116] [2021-11-12 23:46:08,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779560116] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:08,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549546152] [2021-11-12 23:46:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:08,787 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:08,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:08,788 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:08,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:46:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:10,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:10,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-12 23:46:12,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-12 23:46:13,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549546152] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:13,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:46:13,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:46:13,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672959620] [2021-11-12 23:46:13,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:13,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:13,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:13,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:13,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:46:13,059 INFO L87 Difference]: Start difference. First operand 3934 states and 5484 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:46:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:13,762 INFO L93 Difference]: Finished difference Result 3940 states and 5489 transitions. [2021-11-12 23:46:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 121 [2021-11-12 23:46:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:13,777 INFO L225 Difference]: With dead ends: 3940 [2021-11-12 23:46:13,777 INFO L226 Difference]: Without dead ends: 3938 [2021-11-12 23:46:13,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:46:13,781 INFO L933 BasicCegarLoop]: 5226 mSDtfsCounter, 5184 mSDsluCounter, 10429 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5187 SdHoareTripleChecker+Valid, 15655 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.87ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:13,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5187 Valid, 15655 Invalid, 24 Unknown, 0 Unchecked, 19.87ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 105.58ms Time] [2021-11-12 23:46:13,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-11-12 23:46:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3938. [2021-11-12 23:46:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 2643 states have (on average 1.2402572833900871) internal successors, (3278), 2693 states have internal predecessors, (3278), 1106 states have call successors, (1106), 187 states have call predecessors, (1106), 186 states have return successors, (1103), 1094 states have call predecessors, (1103), 1103 states have call successors, (1103) [2021-11-12 23:46:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 5487 transitions. [2021-11-12 23:46:14,143 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 5487 transitions. Word has length 121 [2021-11-12 23:46:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:14,144 INFO L470 AbstractCegarLoop]: Abstraction has 3938 states and 5487 transitions. [2021-11-12 23:46:14,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:46:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 5487 transitions. [2021-11-12 23:46:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:46:14,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:14,148 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:14,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:14,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:14,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:14,561 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:46:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -629493941, now seen corresponding path program 1 times [2021-11-12 23:46:14,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:14,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639741609] [2021-11-12 23:46:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:14,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:14,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:14,565 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:14,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:46:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:17,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-12 23:46:18,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-12 23:46:18,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:18,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639741609] [2021-11-12 23:46:18,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639741609] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:18,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:18,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:18,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810813605] [2021-11-12 23:46:18,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:18,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:18,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:18,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:18,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:18,998 INFO L87 Difference]: Start difference. First operand 3938 states and 5487 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:46:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:19,495 INFO L93 Difference]: Finished difference Result 3944 states and 5492 transitions. [2021-11-12 23:46:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:19,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-11-12 23:46:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:19,505 INFO L225 Difference]: With dead ends: 3944 [2021-11-12 23:46:19,505 INFO L226 Difference]: Without dead ends: 3942 [2021-11-12 23:46:19,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:19,511 INFO L933 BasicCegarLoop]: 5226 mSDtfsCounter, 5194 mSDsluCounter, 10429 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5196 SdHoareTripleChecker+Valid, 15655 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.04ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:19,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5196 Valid, 15655 Invalid, 24 Unknown, 0 Unchecked, 18.04ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 104.43ms Time] [2021-11-12 23:46:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2021-11-12 23:46:19,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3942. [2021-11-12 23:46:19,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 2646 states have (on average 1.2399848828420257) internal successors, (3281), 2696 states have internal predecessors, (3281), 1106 states have call successors, (1106), 188 states have call predecessors, (1106), 187 states have return successors, (1103), 1094 states have call predecessors, (1103), 1103 states have call successors, (1103) [2021-11-12 23:46:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 5490 transitions. [2021-11-12 23:46:19,922 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 5490 transitions. Word has length 113 [2021-11-12 23:46:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:19,923 INFO L470 AbstractCegarLoop]: Abstraction has 3942 states and 5490 transitions. [2021-11-12 23:46:19,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:46:19,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 5490 transitions. [2021-11-12 23:46:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:46:19,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:19,926 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:19,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:20,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:20,149 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:46:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash 198873224, now seen corresponding path program 1 times [2021-11-12 23:46:20,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:20,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183733099] [2021-11-12 23:46:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:20,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:20,153 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:20,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:46:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:22,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:46:22,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-11-12 23:46:24,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-12 23:46:25,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:25,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183733099] [2021-11-12 23:46:25,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183733099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:25,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [238125497] [2021-11-12 23:46:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:25,851 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:25,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:25,852 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:25,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:46:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:27,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:27,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-11-12 23:46:29,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-11-12 23:46:30,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [238125497] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:30,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:46:30,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:46:30,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452836765] [2021-11-12 23:46:30,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:30,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:30,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:46:30,194 INFO L87 Difference]: Start difference. First operand 3942 states and 5490 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 23:46:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:30,882 INFO L93 Difference]: Finished difference Result 3948 states and 5495 transitions. [2021-11-12 23:46:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:30,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 131 [2021-11-12 23:46:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:30,893 INFO L225 Difference]: With dead ends: 3948 [2021-11-12 23:46:30,893 INFO L226 Difference]: Without dead ends: 3944 [2021-11-12 23:46:30,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:46:30,895 INFO L933 BasicCegarLoop]: 5226 mSDtfsCounter, 5184 mSDsluCounter, 10429 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5185 SdHoareTripleChecker+Valid, 15655 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.85ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:30,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5185 Valid, 15655 Invalid, 24 Unknown, 0 Unchecked, 16.85ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 104.72ms Time] [2021-11-12 23:46:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2021-11-12 23:46:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 3944. [2021-11-12 23:46:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3944 states, 2648 states have (on average 1.2394259818731117) internal successors, (3282), 2697 states have internal predecessors, (3282), 1106 states have call successors, (1106), 189 states have call predecessors, (1106), 187 states have return successors, (1103), 1094 states have call predecessors, (1103), 1103 states have call successors, (1103) [2021-11-12 23:46:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 5491 transitions. [2021-11-12 23:46:31,379 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 5491 transitions. Word has length 131 [2021-11-12 23:46:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:31,380 INFO L470 AbstractCegarLoop]: Abstraction has 3944 states and 5491 transitions. [2021-11-12 23:46:31,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 23:46:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 5491 transitions. [2021-11-12 23:46:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:46:31,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:31,385 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:31,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:31,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:31,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:31,801 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:46:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1894536914, now seen corresponding path program 1 times [2021-11-12 23:46:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:31,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8346478] [2021-11-12 23:46:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:31,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:31,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:31,804 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:31,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:46:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:34,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1680 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:46:34,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-11-12 23:46:36,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-12 23:46:37,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:37,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8346478] [2021-11-12 23:46:37,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8346478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:37,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1612064425] [2021-11-12 23:46:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:37,588 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:37,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:37,589 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:37,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 23:46:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:39,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-12 23:46:41,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-12 23:46:41,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1612064425] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:41,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:46:41,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:46:41,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526637532] [2021-11-12 23:46:41,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:41,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:41,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:46:41,986 INFO L87 Difference]: Start difference. First operand 3944 states and 5491 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:46:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:43,008 INFO L93 Difference]: Finished difference Result 7860 states and 10943 transitions. [2021-11-12 23:46:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:46:43,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 136 [2021-11-12 23:46:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:43,042 INFO L225 Difference]: With dead ends: 7860 [2021-11-12 23:46:43,043 INFO L226 Difference]: Without dead ends: 7760 [2021-11-12 23:46:43,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:46:43,049 INFO L933 BasicCegarLoop]: 6565 mSDtfsCounter, 5183 mSDsluCounter, 18290 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5183 SdHoareTripleChecker+Valid, 24855 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.06ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:43,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5183 Valid, 24855 Invalid, 24 Unknown, 0 Unchecked, 27.06ms Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 105.80ms Time] [2021-11-12 23:46:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7760 states. [2021-11-12 23:46:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7760 to 7755. [2021-11-12 23:46:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7755 states, 5212 states have (on average 1.2423254029163469) internal successors, (6475), 5310 states have internal predecessors, (6475), 2182 states have call successors, (2182), 361 states have call predecessors, (2182), 358 states have return successors, (2178), 2156 states have call predecessors, (2178), 2178 states have call successors, (2178) [2021-11-12 23:46:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7755 states to 7755 states and 10835 transitions. [2021-11-12 23:46:44,075 INFO L78 Accepts]: Start accepts. Automaton has 7755 states and 10835 transitions. Word has length 136 [2021-11-12 23:46:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:44,075 INFO L470 AbstractCegarLoop]: Abstraction has 7755 states and 10835 transitions. [2021-11-12 23:46:44,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:46:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7755 states and 10835 transitions. [2021-11-12 23:46:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-12 23:46:44,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:44,084 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:44,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:44,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:44,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:44,497 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:46:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:44,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2053033267, now seen corresponding path program 1 times [2021-11-12 23:46:44,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:44,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494674442] [2021-11-12 23:46:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:44,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:44,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:44,501 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:44,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:46:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:47,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:46:47,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-12 23:46:49,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-12 23:46:51,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:51,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494674442] [2021-11-12 23:46:51,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494674442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:51,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [842662000] [2021-11-12 23:46:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:51,015 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:51,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:51,015 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:51,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:46:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:46:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-12 23:46:53,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-12 23:46:54,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [842662000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:54,064 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:46:54,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [15, 15] total 19 [2021-11-12 23:46:54,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906996190] [2021-11-12 23:46:54,065 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:54,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:46:54,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:54,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:46:54,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:46:54,066 INFO L87 Difference]: Start difference. First operand 7755 states and 10835 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-12 23:46:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:54,561 INFO L93 Difference]: Finished difference Result 15503 states and 21878 transitions. [2021-11-12 23:46:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:46:54,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 215 [2021-11-12 23:46:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:54,601 INFO L225 Difference]: With dead ends: 15503 [2021-11-12 23:46:54,602 INFO L226 Difference]: Without dead ends: 7767 [2021-11-12 23:46:54,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:46:54,646 INFO L933 BasicCegarLoop]: 5228 mSDtfsCounter, 3 mSDsluCounter, 5221 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10449 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.40ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:54,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10449 Invalid, 5 Unknown, 0 Unchecked, 8.40ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 19.22ms Time] [2021-11-12 23:46:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7767 states. [2021-11-12 23:46:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7767 to 7759. [2021-11-12 23:46:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7759 states, 5216 states have (on average 1.2421395705521472) internal successors, (6479), 5314 states have internal predecessors, (6479), 2182 states have call successors, (2182), 361 states have call predecessors, (2182), 358 states have return successors, (2178), 2156 states have call predecessors, (2178), 2178 states have call successors, (2178) [2021-11-12 23:46:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7759 states to 7759 states and 10839 transitions. [2021-11-12 23:46:55,671 INFO L78 Accepts]: Start accepts. Automaton has 7759 states and 10839 transitions. Word has length 215 [2021-11-12 23:46:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:55,672 INFO L470 AbstractCegarLoop]: Abstraction has 7759 states and 10839 transitions. [2021-11-12 23:46:55,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-12 23:46:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7759 states and 10839 transitions. [2021-11-12 23:46:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-12 23:46:55,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:55,683 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:55,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:55,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-12 23:46:56,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:56,097 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:46:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:56,097 INFO L85 PathProgramCache]: Analyzing trace with hash 247594933, now seen corresponding path program 1 times [2021-11-12 23:46:56,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:56,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787381279] [2021-11-12 23:46:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:56,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:56,100 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:56,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:46:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:46:59,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-12 23:47:01,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-12 23:47:02,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:02,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787381279] [2021-11-12 23:47:02,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787381279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:02,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1520765271] [2021-11-12 23:47:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:02,663 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:02,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:02,664 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:02,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:47:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:06,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:47:06,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-12 23:47:07,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-12 23:47:08,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1520765271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:08,181 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:47:08,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [15, 15] total 20 [2021-11-12 23:47:08,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120206204] [2021-11-12 23:47:08,181 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:08,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:47:08,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:47:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:47:08,182 INFO L87 Difference]: Start difference. First operand 7759 states and 10839 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-12 23:47:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:08,856 INFO L93 Difference]: Finished difference Result 15583 states and 22100 transitions. [2021-11-12 23:47:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:47:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 215 [2021-11-12 23:47:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:08,890 INFO L225 Difference]: With dead ends: 15583 [2021-11-12 23:47:08,891 INFO L226 Difference]: Without dead ends: 7843 [2021-11-12 23:47:08,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 838 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:47:08,928 INFO L933 BasicCegarLoop]: 5228 mSDtfsCounter, 36 mSDsluCounter, 5217 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 10445 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.02ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:08,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 10445 Invalid, 21 Unknown, 0 Unchecked, 10.02ms Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 86.61ms Time] [2021-11-12 23:47:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7843 states. [2021-11-12 23:47:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7843 to 7819. [2021-11-12 23:47:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7819 states, 5256 states have (on average 1.2418188736681888) internal successors, (6527), 5354 states have internal predecessors, (6527), 2202 states have call successors, (2202), 361 states have call predecessors, (2202), 358 states have return successors, (2198), 2176 states have call predecessors, (2198), 2198 states have call successors, (2198) [2021-11-12 23:47:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 10927 transitions. [2021-11-12 23:47:09,781 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 10927 transitions. Word has length 215 [2021-11-12 23:47:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:09,782 INFO L470 AbstractCegarLoop]: Abstraction has 7819 states and 10927 transitions. [2021-11-12 23:47:09,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-12 23:47:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 10927 transitions. [2021-11-12 23:47:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-12 23:47:09,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:09,790 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:09,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:10,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-12 23:47:10,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:10,217 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:47:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash -837438168, now seen corresponding path program 1 times [2021-11-12 23:47:10,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:10,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659767948] [2021-11-12 23:47:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:10,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:10,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:10,221 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:10,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:47:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:13,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:47:13,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-12 23:47:15,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-12 23:47:16,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:16,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659767948] [2021-11-12 23:47:16,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659767948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:16,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657052750] [2021-11-12 23:47:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:16,728 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:16,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:16,728 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:16,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 23:47:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:23,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:47:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-12 23:47:30,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:37,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-12 23:47:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-12 23:47:37,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1657052750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:37,861 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:47:37,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17, 10] imperfect sequences [15, 15] total 41 [2021-11-12 23:47:37,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67813549] [2021-11-12 23:47:37,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:37,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 23:47:37,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 23:47:37,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 23:47:37,864 INFO L87 Difference]: Start difference. First operand 7819 states and 10927 transitions. Second operand has 25 states, 21 states have (on average 7.142857142857143) internal successors, (150), 23 states have internal predecessors, (150), 13 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (40), 10 states have call predecessors, (40), 12 states have call successors, (40) [2021-11-12 23:47:40,062 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:42,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:44,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:47,805 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:02,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:04,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:06,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:08,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:09,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:11,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:16,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:21,972 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:23,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:26,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:31,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:33,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:36,017 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:45,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:46,386 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:49,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:51,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:55,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:58,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:01,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:06,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:09,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:18,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:29,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:32,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:33,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:38,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:40,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:42,867 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:44,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:51,846 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:53,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:55,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:05,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:07,386 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:09,391 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:13,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:14,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:17,016 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:23,004 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:25,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:26,479 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:29,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:31,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:33,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:40,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:45,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:48,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:51,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:59,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:01,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:03,475 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:08,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:10,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:12,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:16,110 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:18,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:20,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:22,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:24,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:26,338 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:29,279 INFO L93 Difference]: Finished difference Result 15898 states and 22442 transitions. [2021-11-12 23:51:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:51:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 7.142857142857143) internal successors, (150), 23 states have internal predecessors, (150), 13 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (40), 10 states have call predecessors, (40), 12 states have call successors, (40) Word has length 228 [2021-11-12 23:51:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:29,307 INFO L225 Difference]: With dead ends: 15898 [2021-11-12 23:51:29,307 INFO L226 Difference]: Without dead ends: 8086 [2021-11-12 23:51:29,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 866 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=132, Invalid=1760, Unknown=0, NotChecked=0, Total=1892 [2021-11-12 23:51:29,332 INFO L933 BasicCegarLoop]: 5101 mSDtfsCounter, 146 mSDsluCounter, 66032 mSDsCounter, 0 mSdLazyCounter, 4502 mSolverCounterSat, 19 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 222378.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 71133 SdHoareTripleChecker+Invalid, 5510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 97.08ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 4502 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 953 IncrementalHoareTripleChecker+Unchecked, 229460.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:29,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 71133 Invalid, 5510 Unknown, 0 Unchecked, 97.08ms Time], IncrementalHoareTripleChecker [19 Valid, 4502 Invalid, 36 Unknown, 953 Unchecked, 229460.26ms Time] [2021-11-12 23:51:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8086 states. [2021-11-12 23:51:30,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8086 to 7987. [2021-11-12 23:51:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7987 states, 5372 states have (on average 1.2410647803425168) internal successors, (6667), 5474 states have internal predecessors, (6667), 2238 states have call successors, (2238), 377 states have call predecessors, (2238), 374 states have return successors, (2250), 2208 states have call predecessors, (2250), 2234 states have call successors, (2250) [2021-11-12 23:51:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7987 states to 7987 states and 11155 transitions. [2021-11-12 23:51:30,307 INFO L78 Accepts]: Start accepts. Automaton has 7987 states and 11155 transitions. Word has length 228 [2021-11-12 23:51:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:30,308 INFO L470 AbstractCegarLoop]: Abstraction has 7987 states and 11155 transitions. [2021-11-12 23:51:30,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 7.142857142857143) internal successors, (150), 23 states have internal predecessors, (150), 13 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (40), 10 states have call predecessors, (40), 12 states have call successors, (40) [2021-11-12 23:51:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7987 states and 11155 transitions. [2021-11-12 23:51:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-12 23:51:30,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:30,317 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:30,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:30,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-12 23:51:30,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:51:30,733 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:51:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1428943018, now seen corresponding path program 1 times [2021-11-12 23:51:30,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:30,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231262330] [2021-11-12 23:51:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:30,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:30,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:30,736 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:30,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:51:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:33,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 1947 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:51:33,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-12 23:51:35,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-12 23:51:37,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:37,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231262330] [2021-11-12 23:51:37,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231262330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:51:37,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [646233294] [2021-11-12 23:51:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:37,479 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:51:37,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:51:37,480 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:51:37,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 23:51:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:43,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1947 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:51:43,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-12 23:51:45,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-12 23:51:46,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [646233294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:46,020 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:51:46,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [15, 15] total 23 [2021-11-12 23:51:46,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907159821] [2021-11-12 23:51:46,020 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:46,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:51:46,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:51:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:51:46,022 INFO L87 Difference]: Start difference. First operand 7987 states and 11155 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (43), 4 states have call predecessors, (43), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-12 23:51:48,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:49,114 INFO L93 Difference]: Finished difference Result 7989 states and 11156 transitions. [2021-11-12 23:51:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:51:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (43), 4 states have call predecessors, (43), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 228 [2021-11-12 23:51:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:49,147 INFO L225 Difference]: With dead ends: 7989 [2021-11-12 23:51:49,147 INFO L226 Difference]: Without dead ends: 7721 [2021-11-12 23:51:49,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:51:49,155 INFO L933 BasicCegarLoop]: 5327 mSDtfsCounter, 238 mSDsluCounter, 15786 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2319.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 21113 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2322.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:49,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 21113 Invalid, 13 Unknown, 0 Unchecked, 15.60ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2322.57ms Time] [2021-11-12 23:51:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7721 states. [2021-11-12 23:51:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7721 to 7721. [2021-11-12 23:51:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7721 states, 5187 states have (on average 1.2388663967611335) internal successors, (6426), 5278 states have internal predecessors, (6426), 2160 states have call successors, (2160), 374 states have call predecessors, (2160), 371 states have return successors, (2173), 2136 states have call predecessors, (2173), 2157 states have call successors, (2173) [2021-11-12 23:51:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7721 states to 7721 states and 10759 transitions. [2021-11-12 23:51:49,947 INFO L78 Accepts]: Start accepts. Automaton has 7721 states and 10759 transitions. Word has length 228 [2021-11-12 23:51:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:49,948 INFO L470 AbstractCegarLoop]: Abstraction has 7721 states and 10759 transitions. [2021-11-12 23:51:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (43), 4 states have call predecessors, (43), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-12 23:51:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 7721 states and 10759 transitions. [2021-11-12 23:51:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2021-11-12 23:51:49,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:49,980 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 23, 23, 20, 20, 13, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:50,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:50,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:50,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:51:50,401 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:51:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1690747017, now seen corresponding path program 1 times [2021-11-12 23:51:50,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:50,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080870500] [2021-11-12 23:51:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:50,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:50,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:50,409 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:50,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 23:51:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:55,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 4481 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:51:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-11-12 23:52:01,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2021-11-12 23:52:05,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:05,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080870500] [2021-11-12 23:52:05,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080870500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:05,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [849087168] [2021-11-12 23:52:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:05,556 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:05,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:05,557 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:05,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-12 23:52:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:08,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 4481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:52:08,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 1008 proven. 0 refuted. 0 times theorem prover too weak. 2848 trivial. 0 not checked. [2021-11-12 23:52:13,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2021-11-12 23:52:15,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [849087168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:15,906 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:52:15,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 8] total 10 [2021-11-12 23:52:15,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684568128] [2021-11-12 23:52:15,908 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:15,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:52:15,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:52:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:52:15,910 INFO L87 Difference]: Start difference. First operand 7721 states and 10759 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 2 states have call successors, (196), 2 states have call predecessors, (196), 2 states have return successors, (195), 2 states have call predecessors, (195), 2 states have call successors, (195) [2021-11-12 23:52:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:16,544 INFO L93 Difference]: Finished difference Result 15427 states and 21529 transitions. [2021-11-12 23:52:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:52:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 2 states have call successors, (196), 2 states have call predecessors, (196), 2 states have return successors, (195), 2 states have call predecessors, (195), 2 states have call successors, (195) Word has length 1152 [2021-11-12 23:52:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:16,569 INFO L225 Difference]: With dead ends: 15427 [2021-11-12 23:52:16,569 INFO L226 Difference]: Without dead ends: 7723 [2021-11-12 23:52:16,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4604 GetRequests, 4596 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:52:16,584 INFO L933 BasicCegarLoop]: 5221 mSDtfsCounter, 0 mSDsluCounter, 5216 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10437 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:16,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10437 Invalid, 6 Unknown, 0 Unchecked, 9.89ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 36.40ms Time] [2021-11-12 23:52:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-11-12 23:52:17,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 7723. [2021-11-12 23:52:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7723 states, 5189 states have (on average 1.238774330314126) internal successors, (6428), 5280 states have internal predecessors, (6428), 2160 states have call successors, (2160), 374 states have call predecessors, (2160), 371 states have return successors, (2173), 2136 states have call predecessors, (2173), 2157 states have call successors, (2173) [2021-11-12 23:52:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7723 states to 7723 states and 10761 transitions. [2021-11-12 23:52:17,354 INFO L78 Accepts]: Start accepts. Automaton has 7723 states and 10761 transitions. Word has length 1152 [2021-11-12 23:52:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:17,355 INFO L470 AbstractCegarLoop]: Abstraction has 7723 states and 10761 transitions. [2021-11-12 23:52:17,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 2 states have call successors, (196), 2 states have call predecessors, (196), 2 states have return successors, (195), 2 states have call predecessors, (195), 2 states have call successors, (195) [2021-11-12 23:52:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 7723 states and 10761 transitions. [2021-11-12 23:52:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2021-11-12 23:52:17,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:17,385 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 23, 23, 20, 20, 13, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:17,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:17,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:17,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:17,813 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:52:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:17,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2132010489, now seen corresponding path program 1 times [2021-11-12 23:52:17,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:17,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842547864] [2021-11-12 23:52:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:17,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:17,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:17,819 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:17,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 23:52:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:22,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 4483 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:52:22,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-11-12 23:52:28,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2021-11-12 23:52:32,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:32,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842547864] [2021-11-12 23:52:32,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842547864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:32,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876609987] [2021-11-12 23:52:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:32,611 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:32,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:32,612 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:32,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-12 23:52:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:35,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 4483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:52:35,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 609 proven. 0 refuted. 0 times theorem prover too weak. 3247 trivial. 0 not checked. [2021-11-12 23:52:37,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2021-11-12 23:52:40,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876609987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:40,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:52:40,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 8] total 10 [2021-11-12 23:52:40,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996165410] [2021-11-12 23:52:40,359 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:40,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:52:40,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:40,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:52:40,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:52:40,361 INFO L87 Difference]: Start difference. First operand 7723 states and 10761 transitions. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (146), 2 states have call predecessors, (146), 2 states have call successors, (146) [2021-11-12 23:52:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:40,920 INFO L93 Difference]: Finished difference Result 15441 states and 21671 transitions. [2021-11-12 23:52:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:52:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (146), 2 states have call predecessors, (146), 2 states have call successors, (146) Word has length 1152 [2021-11-12 23:52:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:40,948 INFO L225 Difference]: With dead ends: 15441 [2021-11-12 23:52:40,949 INFO L226 Difference]: Without dead ends: 7735 [2021-11-12 23:52:40,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4604 GetRequests, 4596 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:52:40,972 INFO L933 BasicCegarLoop]: 5224 mSDtfsCounter, 10 mSDsluCounter, 5206 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10430 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.28ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:40,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 10430 Invalid, 5 Unknown, 0 Unchecked, 8.28ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 21.89ms Time] [2021-11-12 23:52:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2021-11-12 23:52:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 7727. [2021-11-12 23:52:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7727 states, 5193 states have (on average 1.2385904101675331) internal successors, (6432), 5284 states have internal predecessors, (6432), 2160 states have call successors, (2160), 374 states have call predecessors, (2160), 371 states have return successors, (2173), 2136 states have call predecessors, (2173), 2157 states have call successors, (2173) [2021-11-12 23:52:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7727 states to 7727 states and 10765 transitions. [2021-11-12 23:52:41,670 INFO L78 Accepts]: Start accepts. Automaton has 7727 states and 10765 transitions. Word has length 1152 [2021-11-12 23:52:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:41,671 INFO L470 AbstractCegarLoop]: Abstraction has 7727 states and 10765 transitions. [2021-11-12 23:52:41,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (146), 2 states have call predecessors, (146), 2 states have call successors, (146) [2021-11-12 23:52:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 7727 states and 10765 transitions. [2021-11-12 23:52:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2021-11-12 23:52:41,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:41,699 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 23, 23, 20, 20, 13, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:41,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:41,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-11-12 23:52:42,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:42,113 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:52:42,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1862845111, now seen corresponding path program 1 times [2021-11-12 23:52:42,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:42,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384298168] [2021-11-12 23:52:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:42,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:42,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:42,130 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:42,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 23:52:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:46,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 4483 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:52:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-11-12 23:52:53,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2021-11-12 23:52:56,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:56,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384298168] [2021-11-12 23:52:56,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384298168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:56,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [137572501] [2021-11-12 23:52:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:56,769 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:56,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:56,770 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:56,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-12 23:52:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:59,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 4483 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:52:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 3610 trivial. 0 not checked. [2021-11-12 23:53:05,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2021-11-12 23:53:08,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [137572501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:08,383 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:53:08,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8, 8] total 15 [2021-11-12 23:53:08,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27570943] [2021-11-12 23:53:08,385 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:08,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:53:08,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:08,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:53:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:53:08,387 INFO L87 Difference]: Start difference. First operand 7727 states and 10765 transitions. Second operand has 8 states, 8 states have (on average 76.875) internal successors, (615), 8 states have internal predecessors, (615), 2 states have call successors, (226), 2 states have call predecessors, (226), 2 states have return successors, (225), 2 states have call predecessors, (225), 2 states have call successors, (225) [2021-11-12 23:53:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:10,573 INFO L93 Difference]: Finished difference Result 16623 states and 23232 transitions. [2021-11-12 23:53:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:53:10,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 76.875) internal successors, (615), 8 states have internal predecessors, (615), 2 states have call successors, (226), 2 states have call predecessors, (226), 2 states have return successors, (225), 2 states have call predecessors, (225), 2 states have call successors, (225) Word has length 1152 [2021-11-12 23:53:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:10,688 INFO L225 Difference]: With dead ends: 16623 [2021-11-12 23:53:10,688 INFO L226 Difference]: Without dead ends: 8913 [2021-11-12 23:53:10,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4608 GetRequests, 4593 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:53:10,705 INFO L933 BasicCegarLoop]: 6016 mSDtfsCounter, 2111 mSDsluCounter, 28769 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1029.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2199 SdHoareTripleChecker+Valid, 34785 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.09ms SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1154.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:10,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2199 Valid, 34785 Invalid, 731 Unknown, 0 Unchecked, 38.09ms Time], IncrementalHoareTripleChecker [617 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 1154.82ms Time] [2021-11-12 23:53:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8913 states. [2021-11-12 23:53:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8913 to 7733. [2021-11-12 23:53:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7733 states, 5199 states have (on average 1.2383150605885747) internal successors, (6438), 5290 states have internal predecessors, (6438), 2160 states have call successors, (2160), 374 states have call predecessors, (2160), 371 states have return successors, (2173), 2136 states have call predecessors, (2173), 2157 states have call successors, (2173) [2021-11-12 23:53:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7733 states to 7733 states and 10771 transitions. [2021-11-12 23:53:11,425 INFO L78 Accepts]: Start accepts. Automaton has 7733 states and 10771 transitions. Word has length 1152 [2021-11-12 23:53:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:11,425 INFO L470 AbstractCegarLoop]: Abstraction has 7733 states and 10771 transitions. [2021-11-12 23:53:11,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.875) internal successors, (615), 8 states have internal predecessors, (615), 2 states have call successors, (226), 2 states have call predecessors, (226), 2 states have return successors, (225), 2 states have call predecessors, (225), 2 states have call successors, (225) [2021-11-12 23:53:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 7733 states and 10771 transitions. [2021-11-12 23:53:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2021-11-12 23:53:11,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:11,455 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 23, 23, 20, 20, 13, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:11,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:11,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:11,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:11,877 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:53:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:11,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1301955189, now seen corresponding path program 1 times [2021-11-12 23:53:11,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:11,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518062664] [2021-11-12 23:53:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:11,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:11,884 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:11,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 23:53:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 4486 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:53:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-11-12 23:53:22,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2021-11-12 23:53:26,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:26,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518062664] [2021-11-12 23:53:26,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518062664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:26,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71277694] [2021-11-12 23:53:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:26,473 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:26,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:53:26,474 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:53:26,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-12 23:53:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:29,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 4486 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:53:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 3484 trivial. 0 not checked. [2021-11-12 23:53:34,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2021-11-12 23:53:37,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [71277694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:37,394 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:53:37,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8, 8] total 11 [2021-11-12 23:53:37,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273617892] [2021-11-12 23:53:37,396 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:37,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:53:37,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:53:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:53:37,399 INFO L87 Difference]: Start difference. First operand 7733 states and 10771 transitions. Second operand has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 2 states have call successors, (211), 2 states have call predecessors, (211), 2 states have return successors, (210), 2 states have call predecessors, (210), 2 states have call successors, (210) [2021-11-12 23:53:40,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:40,427 INFO L93 Difference]: Finished difference Result 15594 states and 21730 transitions. [2021-11-12 23:53:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:53:40,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 2 states have call successors, (211), 2 states have call predecessors, (211), 2 states have return successors, (210), 2 states have call predecessors, (210), 2 states have call successors, (210) Word has length 1152 [2021-11-12 23:53:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:40,450 INFO L225 Difference]: With dead ends: 15594 [2021-11-12 23:53:40,450 INFO L226 Difference]: Without dead ends: 7878 [2021-11-12 23:53:40,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4606 GetRequests, 4596 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:53:40,466 INFO L933 BasicCegarLoop]: 5426 mSDtfsCounter, 2421 mSDsluCounter, 7571 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1985.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2423 SdHoareTripleChecker+Valid, 12997 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.00ms SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2265.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:40,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2423 Valid, 12997 Invalid, 864 Unknown, 0 Unchecked, 16.00ms Time], IncrementalHoareTripleChecker [858 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 2265.12ms Time] [2021-11-12 23:53:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-11-12 23:53:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 7733. [2021-11-12 23:53:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7733 states, 5199 states have (on average 1.2379303712252356) internal successors, (6436), 5290 states have internal predecessors, (6436), 2160 states have call successors, (2160), 374 states have call predecessors, (2160), 371 states have return successors, (2173), 2136 states have call predecessors, (2173), 2157 states have call successors, (2173) [2021-11-12 23:53:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7733 states to 7733 states and 10769 transitions. [2021-11-12 23:53:41,202 INFO L78 Accepts]: Start accepts. Automaton has 7733 states and 10769 transitions. Word has length 1152 [2021-11-12 23:53:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:41,202 INFO L470 AbstractCegarLoop]: Abstraction has 7733 states and 10769 transitions. [2021-11-12 23:53:41,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 2 states have call successors, (211), 2 states have call predecessors, (211), 2 states have return successors, (210), 2 states have call predecessors, (210), 2 states have call successors, (210) [2021-11-12 23:53:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 7733 states and 10769 transitions. [2021-11-12 23:53:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2021-11-12 23:53:41,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:41,224 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 23, 23, 20, 20, 13, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:41,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:41,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-12 23:53:41,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:41,637 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:53:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1429644185, now seen corresponding path program 1 times [2021-11-12 23:53:41,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:41,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301602115] [2021-11-12 23:53:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:41,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:41,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:41,643 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:41,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 23:53:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:46,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 4549 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:53:46,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-11-12 23:53:53,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2021-11-12 23:53:56,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:56,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301602115] [2021-11-12 23:53:56,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301602115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:56,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [271709180] [2021-11-12 23:53:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:56,982 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:53:56,983 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:53:57,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-12 23:53:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 4549 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:53:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 3484 trivial. 0 not checked. [2021-11-12 23:54:05,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2021-11-12 23:54:07,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [271709180] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:07,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:54:07,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8, 8] total 11 [2021-11-12 23:54:07,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314029471] [2021-11-12 23:54:07,958 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:07,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:54:07,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:54:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:54:07,960 INFO L87 Difference]: Start difference. First operand 7733 states and 10769 transitions. Second operand has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 2 states have call successors, (211), 2 states have call predecessors, (211), 2 states have return successors, (210), 2 states have call predecessors, (210), 2 states have call successors, (210) [2021-11-12 23:54:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:10,912 INFO L93 Difference]: Finished difference Result 15647 states and 21805 transitions. [2021-11-12 23:54:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:54:10,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 2 states have call successors, (211), 2 states have call predecessors, (211), 2 states have return successors, (210), 2 states have call predecessors, (210), 2 states have call successors, (210) Word has length 1160 [2021-11-12 23:54:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:10,946 INFO L225 Difference]: With dead ends: 15647 [2021-11-12 23:54:10,946 INFO L226 Difference]: Without dead ends: 7931 [2021-11-12 23:54:10,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4638 GetRequests, 4628 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:54:10,965 INFO L933 BasicCegarLoop]: 5503 mSDtfsCounter, 2424 mSDsluCounter, 7725 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1951.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 13228 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.42ms SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2184.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:10,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 13228 Invalid, 854 Unknown, 0 Unchecked, 15.42ms Time], IncrementalHoareTripleChecker [850 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 2184.00ms Time] [2021-11-12 23:54:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7931 states. [2021-11-12 23:54:11,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7931 to 7733. [2021-11-12 23:54:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7733 states, 5199 states have (on average 1.2375456818618966) internal successors, (6434), 5290 states have internal predecessors, (6434), 2160 states have call successors, (2160), 374 states have call predecessors, (2160), 371 states have return successors, (2173), 2136 states have call predecessors, (2173), 2157 states have call successors, (2173) [2021-11-12 23:54:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7733 states to 7733 states and 10767 transitions. [2021-11-12 23:54:11,727 INFO L78 Accepts]: Start accepts. Automaton has 7733 states and 10767 transitions. Word has length 1160 [2021-11-12 23:54:11,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:11,728 INFO L470 AbstractCegarLoop]: Abstraction has 7733 states and 10767 transitions. [2021-11-12 23:54:11,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 2 states have call successors, (211), 2 states have call predecessors, (211), 2 states have return successors, (210), 2 states have call predecessors, (210), 2 states have call successors, (210) [2021-11-12 23:54:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 7733 states and 10767 transitions. [2021-11-12 23:54:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1316 [2021-11-12 23:54:11,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:11,753 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 22, 22, 13, 13, 13, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:11,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:12,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:12,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:12,153 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-12 23:54:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1997696284, now seen corresponding path program 1 times [2021-11-12 23:54:12,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:12,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050639053] [2021-11-12 23:54:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:12,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:12,162 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:12,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 23:54:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 4944 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:54:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5066 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 4883 trivial. 0 not checked. [2021-11-12 23:54:24,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5066 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 5012 trivial. 0 not checked. [2021-11-12 23:54:28,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:28,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050639053] [2021-11-12 23:54:28,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050639053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:28,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806605910] [2021-11-12 23:54:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:28,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:28,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:54:28,721 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:54:28,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21814680-8cc2-4192-a9a4-a4ddfbe80c91/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-12 23:54:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 4944 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:54:31,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5066 backedges. 1122 proven. 0 refuted. 0 times theorem prover too weak. 3944 trivial. 0 not checked. [2021-11-12 23:54:37,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5066 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5066 trivial. 0 not checked. [2021-11-12 23:54:41,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806605910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:41,096 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:54:41,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8, 8] total 13 [2021-11-12 23:54:41,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82264392] [2021-11-12 23:54:41,097 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:41,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:54:41,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:54:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:54:41,100 INFO L87 Difference]: Start difference. First operand 7733 states and 10767 transitions. Second operand has 6 states, 6 states have (on average 97.83333333333333) internal successors, (587), 6 states have internal predecessors, (587), 2 states have call successors, (211), 2 states have call predecessors, (211), 2 states have return successors, (210), 2 states have call predecessors, (210), 2 states have call successors, (210) [2021-11-12 23:54:43,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:45,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:47,307 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:49,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:56,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:57,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:59,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:01,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:03,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:05,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:07,904 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:12,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:14,391 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:16,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:20,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []