./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/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 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:18:48,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:18:48,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:18:48,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:18:48,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:18:48,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:18:48,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:18:48,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:18:48,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:18:48,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:18:48,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:18:48,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:18:48,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:18:48,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:18:48,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:18:48,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:18:48,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:18:48,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:18:48,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:18:48,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:18:48,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:18:48,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:18:48,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:18:48,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:18:48,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:18:48,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:18:48,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:18:48,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:18:48,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:18:48,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:18:48,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:18:48,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:18:48,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:18:48,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:18:48,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:18:48,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:18:48,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:18:48,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:18:48,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:18:48,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:18:48,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:18:48,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:18:48,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:18:48,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:18:48,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:18:48,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:18:48,196 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:18:48,196 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:18:48,196 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:18:48,197 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:18:48,206 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:18:48,206 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:18:48,207 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:18:48,207 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:18:48,208 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:18:48,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:18:48,208 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:18:48,208 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:18:48,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:18:48,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:18:48,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:18:48,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:18:48,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:18:48,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:18:48,211 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:18:48,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:18:48,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:18:48,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:18:48,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:18:48,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:18:48,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:18:48,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:18:48,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:18:48,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:18:48,215 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:18:48,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:18:48,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:18:48,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:18:48,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:18:48,216 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 [2021-11-12 23:18:48,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:18:48,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:18:48,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:18:48,538 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:18:48,546 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:18:48,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-12 23:18:48,655 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data/763abfd1e/d3fe2f2e04944f2799555edb45d4547a/FLAGc5093ded6 [2021-11-12 23:18:49,539 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:18:49,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-12 23:18:49,600 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data/763abfd1e/d3fe2f2e04944f2799555edb45d4547a/FLAGc5093ded6 [2021-11-12 23:18:49,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data/763abfd1e/d3fe2f2e04944f2799555edb45d4547a [2021-11-12 23:18:49,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:18:49,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:18:49,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:49,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:18:49,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:18:49,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:49" (1/1) ... [2021-11-12 23:18:49,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c238950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:49, skipping insertion in model container [2021-11-12 23:18:49,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:49" (1/1) ... [2021-11-12 23:18:50,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:18:50,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:18:51,672 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 23:18:51,704 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 23:18:51,706 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 23:18:52,939 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-12 23:18:52,941 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-12 23:18:52,942 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-12 23:18:52,942 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-12 23:18:52,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:18:53,027 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 23:18:53,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53b9f270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:53, skipping insertion in model container [2021-11-12 23:18:53,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:53,029 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:18:53,031 INFO L158 Benchmark]: Toolchain (without parser) took 3038.07ms. Allocated memory was 96.5MB in the beginning and 125.8MB in the end (delta: 29.4MB). Free memory was 48.0MB in the beginning and 63.0MB in the end (delta: -15.0MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. [2021-11-12 23:18:53,032 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 53.4MB in the beginning and 53.3MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:18:53,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3035.12ms. Allocated memory was 96.5MB in the beginning and 125.8MB in the end (delta: 29.4MB). Free memory was 47.7MB in the beginning and 63.0MB in the end (delta: -15.2MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. [2021-11-12 23:18:53,035 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 53.4MB in the beginning and 53.3MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3035.12ms. Allocated memory was 96.5MB in the beginning and 125.8MB in the end (delta: 29.4MB). Free memory was 47.7MB in the beginning and 63.0MB in the end (delta: -15.2MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5586]: 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/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 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:18:55,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:18:55,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:18:55,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:18:55,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:18:55,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:18:55,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:18:55,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:18:55,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:18:55,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:18:55,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:18:55,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:18:55,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:18:55,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:18:55,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:18:55,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:18:55,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:18:55,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:18:55,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:18:55,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:18:55,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:18:55,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:18:55,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:18:55,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:18:55,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:18:55,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:18:55,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:18:55,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:18:55,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:18:55,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:18:55,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:18:55,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:18:55,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:18:55,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:18:55,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:18:55,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:18:55,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:18:55,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:18:55,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:18:55,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:18:55,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:18:55,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:18:55,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:18:55,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:18:55,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:18:55,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:18:55,402 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:18:55,402 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:18:55,402 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:18:55,402 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:18:55,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:18:55,403 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:18:55,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:18:55,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:18:55,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:18:55,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:18:55,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:18:55,406 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:18:55,406 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:18:55,406 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:18:55,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:18:55,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:18:55,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:18:55,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:18:55,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:18:55,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:18:55,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:18:55,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:18:55,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:18:55,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:18:55,409 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:18:55,409 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:55,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:18:55,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:18:55,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:18:55,410 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 [2021-11-12 23:18:55,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:18:55,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:18:55,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:18:55,813 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:18:55,813 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:18:55,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-12 23:18:55,891 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data/78dab21a1/043342cfeec647719ace241769e99ca3/FLAG0e1abcebb [2021-11-12 23:18:56,958 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:18:56,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-12 23:18:57,021 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data/78dab21a1/043342cfeec647719ace241769e99ca3/FLAG0e1abcebb [2021-11-12 23:18:57,317 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/data/78dab21a1/043342cfeec647719ace241769e99ca3 [2021-11-12 23:18:57,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:18:57,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:18:57,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:57,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:18:57,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:18:57,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:57" (1/1) ... [2021-11-12 23:18:57,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8bb2150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:57, skipping insertion in model container [2021-11-12 23:18:57,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:57" (1/1) ... [2021-11-12 23:18:57,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:18:57,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:19:00,587 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-12 23:19:00,590 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-12 23:19:00,591 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-12 23:19:00,592 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-12 23:19:00,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:00,682 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:19:00,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:19:01,286 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-12 23:19:01,286 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-12 23:19:01,287 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-12 23:19:01,287 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-12 23:19:01,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:01,350 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:19:01,845 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-12 23:19:01,847 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-12 23:19:01,848 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-12 23:19:01,849 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_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-12 23:19:01,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:02,113 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:19:02,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02 WrapperNode [2021-11-12 23:19:02,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:19:02,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:19:02,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:19:02,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:19:02,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:02,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:02,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:19:02,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:19:02,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:19:02,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:19:02,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:02,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:02,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:02,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:02,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:02,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:02,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:03,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:19:03,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:19:03,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:19:03,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:19:03,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (1/1) ... [2021-11-12 23:19:03,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:19:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:03,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:19:03,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:19:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_reg_nopm [2021-11-12 23:19:03,139 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_reg_nopm [2021-11-12 23:19:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:19:03,139 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:19:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_nway_reset [2021-11-12 23:19:03,139 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_nway_reset [2021-11-12 23:19:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:19:03,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:19:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure smsc_crc [2021-11-12 23:19:03,140 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc_crc [2021-11-12 23:19:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:19:03,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:19:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-12 23:19:03,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-12 23:19:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enable_phy_wakeup_interrupts [2021-11-12 23:19:03,141 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enable_phy_wakeup_interrupts [2021-11-12 23:19:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_reset [2021-11-12 23:19:03,141 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_reset [2021-11-12 23:19:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_wait_eeprom [2021-11-12 23:19:03,142 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_wait_eeprom [2021-11-12 23:19:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_mdio_write [2021-11-12 23:19:03,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_mdio_write [2021-11-12 23:19:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 23:19:03,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 23:19:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd_nopm [2021-11-12 23:19:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-12 23:19:03,143 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-12 23:19:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_rx_csum_offload [2021-11-12 23:19:03,143 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_rx_csum_offload [2021-11-12 23:19:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-12 23:19:03,144 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-12 23:19:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 23:19:03,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 23:19:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:19:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_features [2021-11-12 23:19:03,144 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_features [2021-11-12 23:19:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:19:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:19:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:19:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:19:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2021-11-12 23:19:03,146 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2021-11-12 23:19:03,146 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 23:19:03,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 23:19:03,146 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_tx_timeout [2021-11-12 23:19:03,146 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_tx_timeout [2021-11-12 23:19:03,146 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_read_nopm [2021-11-12 23:19:03,146 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_read_nopm [2021-11-12 23:19:03,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:19:03,147 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:19:03,147 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd [2021-11-12 23:19:03,147 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_phy_wait_not_busy [2021-11-12 23:19:03,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_phy_wait_not_busy [2021-11-12 23:19:03,147 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-12 23:19:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-12 23:19:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_write [2021-11-12 23:19:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_write [2021-11-12 23:19:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd_nopm [2021-11-12 23:19:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:19:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:19:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:19:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-12 23:19:03,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-12 23:19:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-12 23:19:03,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-12 23:19:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:19:03,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:19:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-12 23:19:03,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-12 23:19:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:19:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:19:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:19:03,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:19:03,151 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_open [2021-11-12 23:19:03,151 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_open [2021-11-12 23:19:03,151 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_read [2021-11-12 23:19:03,151 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_read [2021-11-12 23:19:03,151 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_rx_max_frame_length [2021-11-12 23:19:03,152 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_rx_max_frame_length [2021-11-12 23:19:03,152 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-12 23:19:03,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-12 23:19:03,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:19:03,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:19:03,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:19:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_read_reg [2021-11-12 23:19:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_read_reg [2021-11-12 23:19:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:19:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-12 23:19:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-12 23:19:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-12 23:19:03,154 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-12 23:19:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_ethtool_get_eeprom_len [2021-11-12 23:19:03,154 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_ethtool_get_eeprom_len [2021-11-12 23:19:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:19:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:19:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:19:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:19:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:19:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:19:03,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:19:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_smsc75xx_driver_exit_6_2 [2021-11-12 23:19:03,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_smsc75xx_driver_exit_6_2 [2021-11-12 23:19:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-12 23:19:03,156 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-12 23:19:03,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:19:03,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:19:03,156 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_reg [2021-11-12 23:19:03,156 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_reg [2021-11-12 23:19:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_stop [2021-11-12 23:19:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_stop [2021-11-12 23:19:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 23:19:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 23:19:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_write_nopm [2021-11-12 23:19:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_write_nopm [2021-11-12 23:19:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_multicast [2021-11-12 23:19:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_multicast [2021-11-12 23:19:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:19:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-12 23:19:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-12 23:19:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:19:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:19:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:19:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:19:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:19:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:19:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-12 23:19:03,159 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-12 23:19:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 23:19:03,160 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 23:19:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_mdio_read [2021-11-12 23:19:03,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_mdio_read [2021-11-12 23:19:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 23:19:03,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 23:19:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-12 23:19:03,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-12 23:19:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_reg_nopm [2021-11-12 23:19:03,161 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_reg_nopm [2021-11-12 23:19:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2021-11-12 23:19:03,161 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2021-11-12 23:19:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_write_reg [2021-11-12 23:19:03,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_write_reg [2021-11-12 23:19:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_2_4 [2021-11-12 23:19:03,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_2_4 [2021-11-12 23:19:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:19:03,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:19:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_wait_ready [2021-11-12 23:19:03,162 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_wait_ready [2021-11-12 23:19:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-11-12 23:19:03,163 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-11-12 23:19:03,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:19:03,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:19:03,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:19:03,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:19:03,163 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_eeprom [2021-11-12 23:19:03,163 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_eeprom [2021-11-12 23:19:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:19:03,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:19:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd [2021-11-12 23:19:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_link_reset [2021-11-12 23:19:03,164 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_link_reset [2021-11-12 23:19:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_resume [2021-11-12 23:19:03,165 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_resume [2021-11-12 23:19:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_wuff [2021-11-12 23:19:03,165 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_wuff [2021-11-12 23:19:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_eeprom_confirm_not_busy [2021-11-12 23:19:03,165 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_eeprom_confirm_not_busy [2021-11-12 23:19:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~C_INT [2021-11-12 23:19:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~C_INT [2021-11-12 23:19:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 23:19:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 23:19:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enter_suspend2 [2021-11-12 23:19:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enter_suspend2 [2021-11-12 23:19:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enter_suspend1 [2021-11-12 23:19:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enter_suspend1 [2021-11-12 23:19:03,167 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_reg [2021-11-12 23:19:03,167 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_reg [2021-11-12 23:19:03,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_rfe_ctl_lock_of_smsc75xx_priv [2021-11-12 23:19:03,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_rfe_ctl_lock_of_smsc75xx_priv [2021-11-12 23:19:03,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 23:19:03,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 23:19:04,635 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:20:46,279 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-12 23:20:46,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:20:46,352 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:20:46,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:20:46 BoogieIcfgContainer [2021-11-12 23:20:46,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:20:46,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:20:46,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:20:46,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:20:46,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:18:57" (1/3) ... [2021-11-12 23:20:46,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd33671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:20:46, skipping insertion in model container [2021-11-12 23:20:46,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:02" (2/3) ... [2021-11-12 23:20:46,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd33671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:20:46, skipping insertion in model container [2021-11-12 23:20:46,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:20:46" (3/3) ... [2021-11-12 23:20:46,366 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-12 23:20:46,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:20:46,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-12 23:20:46,428 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:20:46,439 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 23:20:46,440 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-12 23:20:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 1730 states, 1252 states have (on average 1.3594249201277955) internal successors, (1702), 1255 states have internal predecessors, (1702), 403 states have call successors, (403), 73 states have call predecessors, (403), 72 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) [2021-11-12 23:20:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-12 23:20:46,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:46,545 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:20:46,546 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:20:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash -747547048, now seen corresponding path program 1 times [2021-11-12 23:20:46,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:46,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166546794] [2021-11-12 23:20:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:46,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:46,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:46,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:46,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:21:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2021-11-12 23:21:08,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2021-11-12 23:21:09,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:09,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166546794] [2021-11-12 23:21:09,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166546794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:09,081 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:09,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:21:09,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495040938] [2021-11-12 23:21:09,084 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:09,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:09,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:09,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:09,140 INFO L87 Difference]: Start difference. First operand has 1730 states, 1252 states have (on average 1.3594249201277955) internal successors, (1702), 1255 states have internal predecessors, (1702), 403 states have call successors, (403), 73 states have call predecessors, (403), 72 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:21:11,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:17,464 INFO L93 Difference]: Finished difference Result 6623 states and 10163 transitions. [2021-11-12 23:21:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:17,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 217 [2021-11-12 23:21:17,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:17,522 INFO L225 Difference]: With dead ends: 6623 [2021-11-12 23:21:17,522 INFO L226 Difference]: Without dead ends: 4913 [2021-11-12 23:21:17,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:17,547 INFO L933 BasicCegarLoop]: 3216 mSDtfsCounter, 4735 mSDsluCounter, 6269 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7294.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4735 SdHoareTripleChecker+Valid, 9485 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.96ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7825.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:17,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4735 Valid, 9485 Invalid, 873 Unknown, 0 Unchecked, 57.96ms Time], IncrementalHoareTripleChecker [26 Valid, 846 Invalid, 1 Unknown, 0 Unchecked, 7825.42ms Time] [2021-11-12 23:21:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2021-11-12 23:21:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4887. [2021-11-12 23:21:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4887 states, 3589 states have (on average 1.3591529674003902) internal successors, (4878), 3594 states have internal predecessors, (4878), 1086 states have call successors, (1086), 210 states have call predecessors, (1086), 209 states have return successors, (1082), 1082 states have call predecessors, (1082), 1082 states have call successors, (1082) [2021-11-12 23:21:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4887 states to 4887 states and 7046 transitions. [2021-11-12 23:21:17,972 INFO L78 Accepts]: Start accepts. Automaton has 4887 states and 7046 transitions. Word has length 217 [2021-11-12 23:21:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:17,977 INFO L470 AbstractCegarLoop]: Abstraction has 4887 states and 7046 transitions. [2021-11-12 23:21:17,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:21:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4887 states and 7046 transitions. [2021-11-12 23:21:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-12 23:21:17,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:17,990 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:21:18,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:18,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:18,203 INFO L402 AbstractCegarLoop]: === Iteration 2 === 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:21:18,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash 379538310, now seen corresponding path program 1 times [2021-11-12 23:21:18,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:18,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227588906] [2021-11-12 23:21:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:18,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:18,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:18,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:18,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:21:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:39,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2021-11-12 23:21:40,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2021-11-12 23:21:40,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:40,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227588906] [2021-11-12 23:21:40,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227588906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:40,782 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:40,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:21:40,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336564241] [2021-11-12 23:21:40,782 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:40,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:21:40,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:40,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:21:40,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:21:40,786 INFO L87 Difference]: Start difference. First operand 4887 states and 7046 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 23:21:43,368 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:44,438 INFO L93 Difference]: Finished difference Result 12365 states and 17849 transitions. [2021-11-12 23:21:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:44,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 228 [2021-11-12 23:21:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:44,530 INFO L225 Difference]: With dead ends: 12365 [2021-11-12 23:21:44,530 INFO L226 Difference]: Without dead ends: 7517 [2021-11-12 23:21:44,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:21:44,566 INFO L933 BasicCegarLoop]: 2946 mSDtfsCounter, 2091 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3011.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2091 SdHoareTripleChecker+Valid, 5331 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.52ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3195.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:44,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2091 Valid, 5331 Invalid, 89 Unknown, 0 Unchecked, 23.52ms Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 1 Unknown, 0 Unchecked, 3195.00ms Time] [2021-11-12 23:21:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7517 states. [2021-11-12 23:21:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7517 to 7490. [2021-11-12 23:21:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 5442 states have (on average 1.362183020948181) internal successors, (7413), 5452 states have internal predecessors, (7413), 1700 states have call successors, (1700), 346 states have call predecessors, (1700), 345 states have return successors, (1696), 1691 states have call predecessors, (1696), 1696 states have call successors, (1696) [2021-11-12 23:21:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 10809 transitions. [2021-11-12 23:21:45,090 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 10809 transitions. Word has length 228 [2021-11-12 23:21:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:45,093 INFO L470 AbstractCegarLoop]: Abstraction has 7490 states and 10809 transitions. [2021-11-12 23:21:45,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 23:21:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 10809 transitions. [2021-11-12 23:21:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-12 23:21:45,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:45,109 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 4, 4, 4, 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] [2021-11-12 23:21:45,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:45,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:45,323 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:21:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash -801769477, now seen corresponding path program 1 times [2021-11-12 23:21:45,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:45,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46480739] [2021-11-12 23:21:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:45,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:45,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:45,341 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:45,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:22:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:08,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 2728 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:22:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-11-12 23:22:10,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-11-12 23:22:12,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:12,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46480739] [2021-11-12 23:22:12,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46480739] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:12,044 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:12,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-12 23:22:12,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869116649] [2021-11-12 23:22:12,045 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:12,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:22:12,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:12,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:22:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:22:12,047 INFO L87 Difference]: Start difference. First operand 7490 states and 10809 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-12 23:22:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:12,600 INFO L93 Difference]: Finished difference Result 7496 states and 10814 transitions. [2021-11-12 23:22:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:22:12,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 276 [2021-11-12 23:22:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:12,662 INFO L225 Difference]: With dead ends: 7496 [2021-11-12 23:22:12,662 INFO L226 Difference]: Without dead ends: 7494 [2021-11-12 23:22:12,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 545 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 23:22:12,671 INFO L933 BasicCegarLoop]: 2464 mSDtfsCounter, 2350 mSDsluCounter, 9831 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2361 SdHoareTripleChecker+Valid, 12295 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 163.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:12,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2361 Valid, 12295 Invalid, 37 Unknown, 0 Unchecked, 29.53ms Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 163.88ms Time] [2021-11-12 23:22:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7494 states. [2021-11-12 23:22:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7494 to 7494. [2021-11-12 23:22:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7494 states, 5445 states have (on average 1.3619834710743801) internal successors, (7416), 5455 states have internal predecessors, (7416), 1700 states have call successors, (1700), 347 states have call predecessors, (1700), 346 states have return successors, (1696), 1691 states have call predecessors, (1696), 1696 states have call successors, (1696) [2021-11-12 23:22:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7494 states to 7494 states and 10812 transitions. [2021-11-12 23:22:13,120 INFO L78 Accepts]: Start accepts. Automaton has 7494 states and 10812 transitions. Word has length 276 [2021-11-12 23:22:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:13,121 INFO L470 AbstractCegarLoop]: Abstraction has 7494 states and 10812 transitions. [2021-11-12 23:22:13,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-12 23:22:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 7494 states and 10812 transitions. [2021-11-12 23:22:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-12 23:22:13,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:13,135 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 4, 4, 4, 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] [2021-11-12 23:22:13,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:13,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:13,351 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:22:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash -66650535, now seen corresponding path program 1 times [2021-11-12 23:22:13,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:13,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141061800] [2021-11-12 23:22:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:13,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:13,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:13,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:13,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:22:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:33,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 2735 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:22:33,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1484 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-11-12 23:22:36,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1484 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-11-12 23:22:37,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:37,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141061800] [2021-11-12 23:22:37,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141061800] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:22:37,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:22:37,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:22:37,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18619019] [2021-11-12 23:22:37,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:37,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:22:37,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:22:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:22:37,233 INFO L87 Difference]: Start difference. First operand 7494 states and 10812 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-12 23:22:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:37,709 INFO L93 Difference]: Finished difference Result 7500 states and 10817 transitions. [2021-11-12 23:22:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:22:37,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 281 [2021-11-12 23:22:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:37,787 INFO L225 Difference]: With dead ends: 7500 [2021-11-12 23:22:37,787 INFO L226 Difference]: Without dead ends: 7498 [2021-11-12 23:22:37,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 555 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 23:22:37,795 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2385 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2395 SdHoareTripleChecker+Valid, 7382 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:37,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2395 Valid, 7382 Invalid, 20 Unknown, 0 Unchecked, 16.67ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 89.61ms Time] [2021-11-12 23:22:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2021-11-12 23:22:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 7498. [2021-11-12 23:22:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7498 states, 5448 states have (on average 1.361784140969163) internal successors, (7419), 5458 states have internal predecessors, (7419), 1700 states have call successors, (1700), 348 states have call predecessors, (1700), 347 states have return successors, (1696), 1691 states have call predecessors, (1696), 1696 states have call successors, (1696) [2021-11-12 23:22:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7498 states to 7498 states and 10815 transitions. [2021-11-12 23:22:38,222 INFO L78 Accepts]: Start accepts. Automaton has 7498 states and 10815 transitions. Word has length 281 [2021-11-12 23:22:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:38,227 INFO L470 AbstractCegarLoop]: Abstraction has 7498 states and 10815 transitions. [2021-11-12 23:22:38,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-12 23:22:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7498 states and 10815 transitions. [2021-11-12 23:22:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-11-12 23:22:38,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:38,239 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 5, 5, 5, 3, 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] [2021-11-12 23:22:38,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:38,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:38,463 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:22:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:38,464 INFO L85 PathProgramCache]: Analyzing trace with hash 261124574, now seen corresponding path program 1 times [2021-11-12 23:22:38,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:38,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191403070] [2021-11-12 23:22:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:38,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:38,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:38,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:38,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:22:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:58,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:22:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-11-12 23:22:59,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2021-11-12 23:22:59,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:59,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191403070] [2021-11-12 23:22:59,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191403070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:59,833 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:59,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:22:59,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244942525] [2021-11-12 23:22:59,833 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:59,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:22:59,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:59,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:22:59,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:22:59,836 INFO L87 Difference]: Start difference. First operand 7498 states and 10815 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (37), 4 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-12 23:23:02,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:07,747 INFO L93 Difference]: Finished difference Result 17964 states and 25903 transitions. [2021-11-12 23:23:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:23:07,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (37), 4 states have call predecessors, (37), 4 states have call successors, (37) Word has length 295 [2021-11-12 23:23:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:07,814 INFO L225 Difference]: With dead ends: 17964 [2021-11-12 23:23:07,815 INFO L226 Difference]: Without dead ends: 11867 [2021-11-12 23:23:07,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:23:07,850 INFO L933 BasicCegarLoop]: 5054 mSDtfsCounter, 4724 mSDsluCounter, 4000 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6850.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4724 SdHoareTripleChecker+Valid, 9054 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.10ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7384.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:07,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4724 Valid, 9054 Invalid, 846 Unknown, 0 Unchecked, 30.10ms Time], IncrementalHoareTripleChecker [16 Valid, 829 Invalid, 1 Unknown, 0 Unchecked, 7384.38ms Time] [2021-11-12 23:23:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11867 states. [2021-11-12 23:23:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11867 to 11833. [2021-11-12 23:23:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11833 states, 8609 states have (on average 1.361830642351028) internal successors, (11724), 8618 states have internal predecessors, (11724), 2670 states have call successors, (2670), 552 states have call predecessors, (2670), 551 states have return successors, (2666), 2662 states have call predecessors, (2666), 2666 states have call successors, (2666) [2021-11-12 23:23:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11833 states to 11833 states and 17060 transitions. [2021-11-12 23:23:08,546 INFO L78 Accepts]: Start accepts. Automaton has 11833 states and 17060 transitions. Word has length 295 [2021-11-12 23:23:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:08,547 INFO L470 AbstractCegarLoop]: Abstraction has 11833 states and 17060 transitions. [2021-11-12 23:23:08,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (37), 4 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-12 23:23:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11833 states and 17060 transitions. [2021-11-12 23:23:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-12 23:23:08,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:08,561 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:08,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:08,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:08,782 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:23:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:08,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1752062587, now seen corresponding path program 1 times [2021-11-12 23:23:08,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:08,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520424056] [2021-11-12 23:23:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:08,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:08,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:08,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:08,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:23:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 2742 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:23:29,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2021-11-12 23:23:31,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2021-11-12 23:23:32,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:32,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520424056] [2021-11-12 23:23:32,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520424056] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:32,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:23:32,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:23:32,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817971269] [2021-11-12 23:23:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:32,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:23:32,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:23:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:23:32,567 INFO L87 Difference]: Start difference. First operand 11833 states and 17060 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:23:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:33,127 INFO L93 Difference]: Finished difference Result 11839 states and 17065 transitions. [2021-11-12 23:23:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 286 [2021-11-12 23:23:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:33,184 INFO L225 Difference]: With dead ends: 11839 [2021-11-12 23:23:33,184 INFO L226 Difference]: Without dead ends: 11837 [2021-11-12 23:23:33,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:33,193 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2385 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2394 SdHoareTripleChecker+Valid, 7382 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.42ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:33,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2394 Valid, 7382 Invalid, 20 Unknown, 0 Unchecked, 11.42ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 85.25ms Time] [2021-11-12 23:23:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-11-12 23:23:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11837. [2021-11-12 23:23:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11837 states, 8612 states have (on average 1.3617045982350209) internal successors, (11727), 8621 states have internal predecessors, (11727), 2670 states have call successors, (2670), 553 states have call predecessors, (2670), 552 states have return successors, (2666), 2662 states have call predecessors, (2666), 2666 states have call successors, (2666) [2021-11-12 23:23:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11837 states to 11837 states and 17063 transitions. [2021-11-12 23:23:33,870 INFO L78 Accepts]: Start accepts. Automaton has 11837 states and 17063 transitions. Word has length 286 [2021-11-12 23:23:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:33,871 INFO L470 AbstractCegarLoop]: Abstraction has 11837 states and 17063 transitions. [2021-11-12 23:23:33,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:23:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 11837 states and 17063 transitions. [2021-11-12 23:23:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-12 23:23:33,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:33,886 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 23:23:33,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:34,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:34,107 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:23:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash -597533863, now seen corresponding path program 1 times [2021-11-12 23:23:34,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:34,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546428426] [2021-11-12 23:23:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:34,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:34,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:34,120 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:34,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:23:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:53,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 2749 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:23:53,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2021-11-12 23:23:56,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2021-11-12 23:23:57,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:57,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546428426] [2021-11-12 23:23:57,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546428426] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:57,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:23:57,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:23:57,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171419587] [2021-11-12 23:23:57,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:57,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:23:57,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:23:57,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:23:57,678 INFO L87 Difference]: Start difference. First operand 11837 states and 17063 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:23:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:58,232 INFO L93 Difference]: Finished difference Result 11843 states and 17068 transitions. [2021-11-12 23:23:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:58,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 291 [2021-11-12 23:23:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:58,285 INFO L225 Difference]: With dead ends: 11843 [2021-11-12 23:23:58,285 INFO L226 Difference]: Without dead ends: 11841 [2021-11-12 23:23:58,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 575 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 23:23:58,294 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2385 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2393 SdHoareTripleChecker+Valid, 7382 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:58,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2393 Valid, 7382 Invalid, 20 Unknown, 0 Unchecked, 9.49ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 70.78ms Time] [2021-11-12 23:23:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11841 states. [2021-11-12 23:23:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11841 to 11841. [2021-11-12 23:23:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11841 states, 8615 states have (on average 1.3615786419036564) internal successors, (11730), 8624 states have internal predecessors, (11730), 2670 states have call successors, (2670), 554 states have call predecessors, (2670), 553 states have return successors, (2666), 2662 states have call predecessors, (2666), 2666 states have call successors, (2666) [2021-11-12 23:23:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11841 states to 11841 states and 17066 transitions. [2021-11-12 23:23:59,117 INFO L78 Accepts]: Start accepts. Automaton has 11841 states and 17066 transitions. Word has length 291 [2021-11-12 23:23:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:59,119 INFO L470 AbstractCegarLoop]: Abstraction has 11841 states and 17066 transitions. [2021-11-12 23:23:59,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:23:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 11841 states and 17066 transitions. [2021-11-12 23:23:59,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-12 23:23:59,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:59,134 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 5, 4, 4, 4, 4, 4, 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] [2021-11-12 23:23:59,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:59,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:59,355 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:23:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1004489979, now seen corresponding path program 1 times [2021-11-12 23:23:59,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:59,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466516391] [2021-11-12 23:23:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:59,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:59,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:59,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:59,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:24:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:19,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 2756 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:19,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1506 trivial. 0 not checked. [2021-11-12 23:24:21,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1506 trivial. 0 not checked. [2021-11-12 23:24:23,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:23,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466516391] [2021-11-12 23:24:23,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466516391] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:23,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:23,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:24:23,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327247846] [2021-11-12 23:24:23,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:23,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:23,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:23,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:23,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:23,223 INFO L87 Difference]: Start difference. First operand 11841 states and 17066 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 23:24:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:23,893 INFO L93 Difference]: Finished difference Result 11847 states and 17071 transitions. [2021-11-12 23:24:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:23,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 296 [2021-11-12 23:24:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:23,938 INFO L225 Difference]: With dead ends: 11847 [2021-11-12 23:24:23,939 INFO L226 Difference]: Without dead ends: 11845 [2021-11-12 23:24:23,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 585 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 23:24:23,944 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2385 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2392 SdHoareTripleChecker+Valid, 7382 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:23,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2392 Valid, 7382 Invalid, 20 Unknown, 0 Unchecked, 10.05ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 77.33ms Time] [2021-11-12 23:24:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11845 states. [2021-11-12 23:24:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11845 to 11845. [2021-11-12 23:24:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11845 states, 8618 states have (on average 1.3614527732652588) internal successors, (11733), 8627 states have internal predecessors, (11733), 2670 states have call successors, (2670), 555 states have call predecessors, (2670), 554 states have return successors, (2666), 2662 states have call predecessors, (2666), 2666 states have call successors, (2666) [2021-11-12 23:24:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11845 states to 11845 states and 17069 transitions. [2021-11-12 23:24:24,684 INFO L78 Accepts]: Start accepts. Automaton has 11845 states and 17069 transitions. Word has length 296 [2021-11-12 23:24:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:24,685 INFO L470 AbstractCegarLoop]: Abstraction has 11845 states and 17069 transitions. [2021-11-12 23:24:24,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 23:24:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 11845 states and 17069 transitions. [2021-11-12 23:24:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-12 23:24:24,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:24,703 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 6, 5, 5, 5, 5, 5, 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] [2021-11-12 23:24:24,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:24,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:24,919 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:24:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:24,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1170910926, now seen corresponding path program 1 times [2021-11-12 23:24:24,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:24,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071654070] [2021-11-12 23:24:24,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:24,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:24,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:24,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:24,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:24:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:45,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 2806 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:24:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2021-11-12 23:24:45,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2021-11-12 23:24:46,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:46,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071654070] [2021-11-12 23:24:46,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071654070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:46,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:46,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:24:46,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17796863] [2021-11-12 23:24:46,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:46,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:46,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:46,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:46,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:24:46,678 INFO L87 Difference]: Start difference. First operand 11845 states and 17069 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 4 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-12 23:24:49,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:54,805 INFO L93 Difference]: Finished difference Result 25322 states and 36458 transitions. [2021-11-12 23:24:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 4 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 311 [2021-11-12 23:24:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:54,884 INFO L225 Difference]: With dead ends: 25322 [2021-11-12 23:24:54,885 INFO L226 Difference]: Without dead ends: 14878 [2021-11-12 23:24:54,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:24:54,945 INFO L933 BasicCegarLoop]: 5126 mSDtfsCounter, 4697 mSDsluCounter, 4470 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6854.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4697 SdHoareTripleChecker+Valid, 9596 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.13ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7365.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:54,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4697 Valid, 9596 Invalid, 813 Unknown, 0 Unchecked, 24.13ms Time], IncrementalHoareTripleChecker [14 Valid, 798 Invalid, 1 Unknown, 0 Unchecked, 7365.01ms Time] [2021-11-12 23:24:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14878 states. [2021-11-12 23:24:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14878 to 14794. [2021-11-12 23:24:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14794 states, 10773 states have (on average 1.3607166063306415) internal successors, (14659), 10782 states have internal predecessors, (14659), 3328 states have call successors, (3328), 691 states have call predecessors, (3328), 690 states have return successors, (3324), 3320 states have call predecessors, (3324), 3324 states have call successors, (3324) [2021-11-12 23:24:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14794 states to 14794 states and 21311 transitions. [2021-11-12 23:24:56,029 INFO L78 Accepts]: Start accepts. Automaton has 14794 states and 21311 transitions. Word has length 311 [2021-11-12 23:24:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:56,030 INFO L470 AbstractCegarLoop]: Abstraction has 14794 states and 21311 transitions. [2021-11-12 23:24:56,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 4 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-12 23:24:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 14794 states and 21311 transitions. [2021-11-12 23:24:56,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-12 23:24:56,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:56,043 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 6, 5, 5, 4, 4, 4, 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] [2021-11-12 23:24:56,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:56,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:56,259 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:24:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:56,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2120165465, now seen corresponding path program 1 times [2021-11-12 23:24:56,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:56,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467905932] [2021-11-12 23:24:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:56,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:56,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:56,271 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:56,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:25:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:16,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 2763 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:25:16,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2021-11-12 23:25:19,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2021-11-12 23:25:20,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:20,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467905932] [2021-11-12 23:25:20,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467905932] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:20,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:20,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:25:20,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539833810] [2021-11-12 23:25:20,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:20,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:25:20,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:25:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:25:20,679 INFO L87 Difference]: Start difference. First operand 14794 states and 21311 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 23:25:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:21,491 INFO L93 Difference]: Finished difference Result 14800 states and 21316 transitions. [2021-11-12 23:25:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:25:21,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 301 [2021-11-12 23:25:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:21,550 INFO L225 Difference]: With dead ends: 14800 [2021-11-12 23:25:21,550 INFO L226 Difference]: Without dead ends: 14798 [2021-11-12 23:25:21,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 595 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 23:25:21,561 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2385 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2391 SdHoareTripleChecker+Valid, 7382 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.19ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:21,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2391 Valid, 7382 Invalid, 20 Unknown, 0 Unchecked, 10.19ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 77.80ms Time] [2021-11-12 23:25:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14798 states. [2021-11-12 23:25:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14798 to 14798. [2021-11-12 23:25:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14798 states, 10776 states have (on average 1.3606161841128435) internal successors, (14662), 10785 states have internal predecessors, (14662), 3328 states have call successors, (3328), 692 states have call predecessors, (3328), 691 states have return successors, (3324), 3320 states have call predecessors, (3324), 3324 states have call successors, (3324) [2021-11-12 23:25:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 21314 transitions. [2021-11-12 23:25:22,401 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 21314 transitions. Word has length 301 [2021-11-12 23:25:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:22,402 INFO L470 AbstractCegarLoop]: Abstraction has 14798 states and 21314 transitions. [2021-11-12 23:25:22,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 23:25:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 21314 transitions. [2021-11-12 23:25:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-12 23:25:22,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:22,415 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 7, 6, 6, 4, 4, 4, 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] [2021-11-12 23:25:22,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:22,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:22,631 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:25:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1226100603, now seen corresponding path program 1 times [2021-11-12 23:25:22,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:22,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682245662] [2021-11-12 23:25:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:22,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:22,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:22,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:22,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:25:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:42,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 2770 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:25:42,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2021-11-12 23:25:45,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2021-11-12 23:25:46,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:46,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682245662] [2021-11-12 23:25:46,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682245662] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:46,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:46,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:25:46,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132977429] [2021-11-12 23:25:46,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:46,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:25:46,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:25:46,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:25:46,812 INFO L87 Difference]: Start difference. First operand 14798 states and 21314 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 23:25:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:47,622 INFO L93 Difference]: Finished difference Result 14804 states and 21319 transitions. [2021-11-12 23:25:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:25:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 306 [2021-11-12 23:25:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:47,676 INFO L225 Difference]: With dead ends: 14804 [2021-11-12 23:25:47,676 INFO L226 Difference]: Without dead ends: 14802 [2021-11-12 23:25:47,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 605 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 23:25:47,685 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2385 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2390 SdHoareTripleChecker+Valid, 7382 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:47,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2390 Valid, 7382 Invalid, 20 Unknown, 0 Unchecked, 10.71ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 77.03ms Time] [2021-11-12 23:25:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14802 states. [2021-11-12 23:25:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14802 to 14802. [2021-11-12 23:25:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14802 states, 10779 states have (on average 1.3605158177938583) internal successors, (14665), 10788 states have internal predecessors, (14665), 3328 states have call successors, (3328), 693 states have call predecessors, (3328), 692 states have return successors, (3324), 3320 states have call predecessors, (3324), 3324 states have call successors, (3324) [2021-11-12 23:25:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14802 states to 14802 states and 21317 transitions. [2021-11-12 23:25:48,599 INFO L78 Accepts]: Start accepts. Automaton has 14802 states and 21317 transitions. Word has length 306 [2021-11-12 23:25:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:48,600 INFO L470 AbstractCegarLoop]: Abstraction has 14802 states and 21317 transitions. [2021-11-12 23:25:48,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 23:25:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 14802 states and 21317 transitions. [2021-11-12 23:25:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-12 23:25:48,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:48,614 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 8, 7, 7, 4, 4, 4, 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] [2021-11-12 23:25:48,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:48,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:48,839 INFO L402 AbstractCegarLoop]: === Iteration 12 === 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:25:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash 452027737, now seen corresponding path program 1 times [2021-11-12 23:25:48,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:48,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399588911] [2021-11-12 23:25:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:48,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:48,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:48,847 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:48,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:26:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:08,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:26:08,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1566 trivial. 0 not checked. [2021-11-12 23:26:11,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1566 trivial. 0 not checked. [2021-11-12 23:26:12,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:12,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399588911] [2021-11-12 23:26:12,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399588911] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:12,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:12,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:26:12,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195902238] [2021-11-12 23:26:12,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:12,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:26:12,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:26:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:12,986 INFO L87 Difference]: Start difference. First operand 14802 states and 21317 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 23:26:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:13,815 INFO L93 Difference]: Finished difference Result 14808 states and 21322 transitions. [2021-11-12 23:26:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:26:13,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 311 [2021-11-12 23:26:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:13,856 INFO L225 Difference]: With dead ends: 14808 [2021-11-12 23:26:13,856 INFO L226 Difference]: Without dead ends: 14806 [2021-11-12 23:26:13,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 615 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 23:26:13,863 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2385 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2389 SdHoareTripleChecker+Valid, 7382 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.42ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:13,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2389 Valid, 7382 Invalid, 20 Unknown, 0 Unchecked, 9.42ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 75.62ms Time] [2021-11-12 23:26:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14806 states. [2021-11-12 23:26:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14806 to 14806. [2021-11-12 23:26:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14806 states, 10782 states have (on average 1.3604155073270265) internal successors, (14668), 10791 states have internal predecessors, (14668), 3328 states have call successors, (3328), 694 states have call predecessors, (3328), 693 states have return successors, (3324), 3320 states have call predecessors, (3324), 3324 states have call successors, (3324) [2021-11-12 23:26:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14806 states to 14806 states and 21320 transitions. [2021-11-12 23:26:14,657 INFO L78 Accepts]: Start accepts. Automaton has 14806 states and 21320 transitions. Word has length 311 [2021-11-12 23:26:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:14,658 INFO L470 AbstractCegarLoop]: Abstraction has 14806 states and 21320 transitions. [2021-11-12 23:26:14,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 23:26:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 14806 states and 21320 transitions. [2021-11-12 23:26:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-12 23:26:14,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:14,674 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 9, 8, 8, 4, 4, 4, 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] [2021-11-12 23:26:14,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-12 23:26:14,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:14,880 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:26:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash -811933189, now seen corresponding path program 1 times [2021-11-12 23:26:14,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:14,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289755508] [2021-11-12 23:26:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:14,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:14,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:14,888 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:14,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:26:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:26:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1594 trivial. 0 not checked. [2021-11-12 23:26:37,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1594 trivial. 0 not checked. [2021-11-12 23:26:39,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:39,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289755508] [2021-11-12 23:26:39,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289755508] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:39,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:39,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:26:39,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166106081] [2021-11-12 23:26:39,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:39,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:26:39,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:26:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:39,028 INFO L87 Difference]: Start difference. First operand 14806 states and 21320 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 23:26:40,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:40,002 INFO L93 Difference]: Finished difference Result 14812 states and 21325 transitions. [2021-11-12 23:26:40,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:26:40,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 316 [2021-11-12 23:26:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:40,045 INFO L225 Difference]: With dead ends: 14812 [2021-11-12 23:26:40,045 INFO L226 Difference]: Without dead ends: 14810 [2021-11-12 23:26:40,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 625 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 23:26:40,051 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2385 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2388 SdHoareTripleChecker+Valid, 7382 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.85ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:40,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2388 Valid, 7382 Invalid, 20 Unknown, 0 Unchecked, 10.85ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 94.91ms Time] [2021-11-12 23:26:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14810 states. [2021-11-12 23:26:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14810 to 14810. [2021-11-12 23:26:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14810 states, 10785 states have (on average 1.3603152526657394) internal successors, (14671), 10794 states have internal predecessors, (14671), 3328 states have call successors, (3328), 695 states have call predecessors, (3328), 694 states have return successors, (3324), 3320 states have call predecessors, (3324), 3324 states have call successors, (3324) [2021-11-12 23:26:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14810 states to 14810 states and 21323 transitions. [2021-11-12 23:26:40,858 INFO L78 Accepts]: Start accepts. Automaton has 14810 states and 21323 transitions. Word has length 316 [2021-11-12 23:26:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:40,859 INFO L470 AbstractCegarLoop]: Abstraction has 14810 states and 21323 transitions. [2021-11-12 23:26:40,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 23:26:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 14810 states and 21323 transitions. [2021-11-12 23:26:40,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-12 23:26:40,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:40,869 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 10, 9, 9, 4, 4, 4, 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] [2021-11-12 23:26:40,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:41,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:41,069 INFO L402 AbstractCegarLoop]: === Iteration 14 === 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:26:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:41,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1242370649, now seen corresponding path program 1 times [2021-11-12 23:26:41,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:41,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74759804] [2021-11-12 23:26:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:41,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:41,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:41,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:27:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:00,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 2791 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:27:00,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2021-11-12 23:27:03,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2021-11-12 23:27:05,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:05,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74759804] [2021-11-12 23:27:05,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74759804] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:05,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:27:05,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:27:05,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594791781] [2021-11-12 23:27:05,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:05,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:27:05,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:05,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:27:05,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:27:05,111 INFO L87 Difference]: Start difference. First operand 14810 states and 21323 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 23:27:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:06,035 INFO L93 Difference]: Finished difference Result 14886 states and 21378 transitions. [2021-11-12 23:27:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:27:06,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 321 [2021-11-12 23:27:06,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:06,081 INFO L225 Difference]: With dead ends: 14886 [2021-11-12 23:27:06,081 INFO L226 Difference]: Without dead ends: 14884 [2021-11-12 23:27:06,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 635 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 23:27:06,089 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2311 mSDsluCounter, 4992 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2313 SdHoareTripleChecker+Valid, 7459 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.36ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:06,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2313 Valid, 7459 Invalid, 22 Unknown, 0 Unchecked, 10.36ms Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 80.54ms Time] [2021-11-12 23:27:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14884 states. [2021-11-12 23:27:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14884 to 14884. [2021-11-12 23:27:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14884 states, 10838 states have (on average 1.3585532386049086) internal successors, (14724), 10847 states have internal predecessors, (14724), 3328 states have call successors, (3328), 716 states have call predecessors, (3328), 715 states have return successors, (3324), 3320 states have call predecessors, (3324), 3324 states have call successors, (3324) [2021-11-12 23:27:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 21376 transitions. [2021-11-12 23:27:06,895 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 21376 transitions. Word has length 321 [2021-11-12 23:27:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:06,895 INFO L470 AbstractCegarLoop]: Abstraction has 14884 states and 21376 transitions. [2021-11-12 23:27:06,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 23:27:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 21376 transitions. [2021-11-12 23:27:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-12 23:27:06,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:06,907 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 17, 17, 17, 17, 17, 17, 11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:27:06,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:07,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:07,108 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:27:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash 234180815, now seen corresponding path program 1 times [2021-11-12 23:27:07,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:07,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154709795] [2021-11-12 23:27:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:07,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:07,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:07,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:07,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:27:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:27:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 311 proven. 3 refuted. 0 times theorem prover too weak. 1545 trivial. 0 not checked. [2021-11-12 23:27:29,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 1788 trivial. 0 not checked. [2021-11-12 23:27:31,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:31,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154709795] [2021-11-12 23:27:31,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154709795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:31,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1319236812] [2021-11-12 23:27:31,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:31,814 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:31,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:27:31,816 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:27:31,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:27:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:36,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:27:36,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2021-11-12 23:27:39,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2021-11-12 23:27:41,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1319236812] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:41,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:27:41,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 17, 4] total 27 [2021-11-12 23:27:41,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404513541] [2021-11-12 23:27:41,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:41,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:27:41,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:41,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:27:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:27:41,454 INFO L87 Difference]: Start difference. First operand 14884 states and 21376 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-12 23:27:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:42,793 INFO L93 Difference]: Finished difference Result 14890 states and 21381 transitions. [2021-11-12 23:27:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:27:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 362 [2021-11-12 23:27:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:42,841 INFO L225 Difference]: With dead ends: 14890 [2021-11-12 23:27:42,842 INFO L226 Difference]: Without dead ends: 14886 [2021-11-12 23:27:42,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1447 GetRequests, 1419 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:27:42,849 INFO L933 BasicCegarLoop]: 2467 mSDtfsCounter, 2379 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2380 SdHoareTripleChecker+Valid, 7382 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.23ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:42,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2380 Valid, 7382 Invalid, 20 Unknown, 0 Unchecked, 13.23ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 88.99ms Time] [2021-11-12 23:27:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14886 states. [2021-11-12 23:27:43,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14886 to 14886. [2021-11-12 23:27:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14886 states, 10840 states have (on average 1.3583948339483394) internal successors, (14725), 10848 states have internal predecessors, (14725), 3328 states have call successors, (3328), 717 states have call predecessors, (3328), 715 states have return successors, (3324), 3320 states have call predecessors, (3324), 3324 states have call successors, (3324) [2021-11-12 23:27:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14886 states to 14886 states and 21377 transitions. [2021-11-12 23:27:43,693 INFO L78 Accepts]: Start accepts. Automaton has 14886 states and 21377 transitions. Word has length 362 [2021-11-12 23:27:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:43,694 INFO L470 AbstractCegarLoop]: Abstraction has 14886 states and 21377 transitions. [2021-11-12 23:27:43,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-12 23:27:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 14886 states and 21377 transitions. [2021-11-12 23:27:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-12 23:27:43,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:43,706 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 17, 17, 17, 17, 17, 12, 11, 11, 4, 4, 4, 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] [2021-11-12 23:27:43,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:43,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:44,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:44,107 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:27:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:44,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1118187353, now seen corresponding path program 1 times [2021-11-12 23:27:44,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:44,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691447285] [2021-11-12 23:27:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:44,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:44,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:44,115 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:44,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:28:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:28:03,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1702 trivial. 0 not checked. [2021-11-12 23:28:06,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1702 trivial. 0 not checked. [2021-11-12 23:28:08,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:08,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691447285] [2021-11-12 23:28:08,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691447285] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:08,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:28:08,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:28:08,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778982537] [2021-11-12 23:28:08,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:08,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:28:08,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:08,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:28:08,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:28:08,087 INFO L87 Difference]: Start difference. First operand 14886 states and 21377 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:28:09,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:09,042 INFO L93 Difference]: Finished difference Result 14886 states and 21377 transitions. [2021-11-12 23:28:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:28:09,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 331 [2021-11-12 23:28:09,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:09,098 INFO L225 Difference]: With dead ends: 14886 [2021-11-12 23:28:09,098 INFO L226 Difference]: Without dead ends: 14764 [2021-11-12 23:28:09,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 655 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 23:28:09,110 INFO L933 BasicCegarLoop]: 2465 mSDtfsCounter, 2381 mSDsluCounter, 4914 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2381 SdHoareTripleChecker+Valid, 7379 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.13ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:09,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2381 Valid, 7379 Invalid, 15 Unknown, 0 Unchecked, 10.13ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 56.26ms Time] [2021-11-12 23:28:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14764 states. [2021-11-12 23:28:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14764 to 13384. [2021-11-12 23:28:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13384 states, 9761 states have (on average 1.3604138920192603) internal successors, (13279), 9764 states have internal predecessors, (13279), 2989 states have call successors, (2989), 632 states have call predecessors, (2989), 632 states have return successors, (2989), 2987 states have call predecessors, (2989), 2989 states have call successors, (2989) [2021-11-12 23:28:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13384 states to 13384 states and 19257 transitions. [2021-11-12 23:28:10,033 INFO L78 Accepts]: Start accepts. Automaton has 13384 states and 19257 transitions. Word has length 331 [2021-11-12 23:28:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:10,034 INFO L470 AbstractCegarLoop]: Abstraction has 13384 states and 19257 transitions. [2021-11-12 23:28:10,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:28:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 13384 states and 19257 transitions. [2021-11-12 23:28:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-12 23:28:10,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:10,045 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 17, 17, 17, 17, 17, 17, 5, 5, 5, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:28:10,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:10,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:10,249 INFO L402 AbstractCegarLoop]: === Iteration 17 === 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:28:10,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1703100701, now seen corresponding path program 1 times [2021-11-12 23:28:10,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:10,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925015108] [2021-11-12 23:28:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:10,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:10,258 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:10,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:28:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:30,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:28:30,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 371 proven. 3 refuted. 0 times theorem prover too weak. 1351 trivial. 0 not checked. [2021-11-12 23:28:32,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 1667 trivial. 0 not checked. [2021-11-12 23:28:34,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:34,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925015108] [2021-11-12 23:28:34,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925015108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:34,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [693547198] [2021-11-12 23:28:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:34,210 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:34,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:34,211 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:34,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 23:28:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:38,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:28:38,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 1544 trivial. 0 not checked. [2021-11-12 23:28:39,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 1695 trivial. 0 not checked. [2021-11-12 23:28:39,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [693547198] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:39,852 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:28:39,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [17, 17] total 23 [2021-11-12 23:28:39,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501105328] [2021-11-12 23:28:39,853 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:39,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:28:39,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:28:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:28:39,855 INFO L87 Difference]: Start difference. First operand 13384 states and 19257 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 23:28:42,337 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:43,284 INFO L93 Difference]: Finished difference Result 26763 states and 38489 transitions. [2021-11-12 23:28:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:28:43,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 334 [2021-11-12 23:28:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:43,329 INFO L225 Difference]: With dead ends: 26763 [2021-11-12 23:28:43,329 INFO L226 Difference]: Without dead ends: 14781 [2021-11-12 23:28:43,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 1311 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:28:43,370 INFO L933 BasicCegarLoop]: 4692 mSDtfsCounter, 2272 mSDsluCounter, 2387 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2554.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2272 SdHoareTripleChecker+Valid, 7079 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.60ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2657.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:43,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2272 Valid, 7079 Invalid, 25 Unknown, 0 Unchecked, 8.60ms Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2657.26ms Time] [2021-11-12 23:28:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14781 states. [2021-11-12 23:28:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14781 to 11820. [2021-11-12 23:28:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11820 states, 8605 states have (on average 1.35979081929111) internal successors, (11701), 8608 states have internal predecessors, (11701), 2648 states have call successors, (2648), 565 states have call predecessors, (2648), 565 states have return successors, (2648), 2646 states have call predecessors, (2648), 2648 states have call successors, (2648) [2021-11-12 23:28:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11820 states to 11820 states and 16997 transitions. [2021-11-12 23:28:44,273 INFO L78 Accepts]: Start accepts. Automaton has 11820 states and 16997 transitions. Word has length 334 [2021-11-12 23:28:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:44,274 INFO L470 AbstractCegarLoop]: Abstraction has 11820 states and 16997 transitions. [2021-11-12 23:28:44,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 23:28:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 11820 states and 16997 transitions. [2021-11-12 23:28:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-12 23:28:44,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:44,286 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 17, 17, 17, 17, 17, 17, 5, 5, 5, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:28:44,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:44,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:44,691 INFO L402 AbstractCegarLoop]: === Iteration 18 === 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:28:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1142400923, now seen corresponding path program 1 times [2021-11-12 23:28:44,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:44,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928950402] [2021-11-12 23:28:44,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:44,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:44,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:44,700 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:44,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:29:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:29:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 371 proven. 3 refuted. 0 times theorem prover too weak. 1351 trivial. 0 not checked. [2021-11-12 23:29:06,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 1667 trivial. 0 not checked. [2021-11-12 23:29:08,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:08,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928950402] [2021-11-12 23:29:08,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928950402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:08,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1541090950] [2021-11-12 23:29:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:08,901 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:08,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:08,902 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:08,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 23:29:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:13,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:13,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 1645 trivial. 0 not checked. [2021-11-12 23:29:13,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2021-11-12 23:29:14,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1541090950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:14,457 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:14,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [17, 17] total 23 [2021-11-12 23:29:14,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474788114] [2021-11-12 23:29:14,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:14,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:14,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:14,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:29:14,459 INFO L87 Difference]: Start difference. First operand 11820 states and 16997 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-12 23:29:16,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:18,365 INFO L93 Difference]: Finished difference Result 26549 states and 38190 transitions. [2021-11-12 23:29:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 334 [2021-11-12 23:29:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:18,405 INFO L225 Difference]: With dead ends: 26549 [2021-11-12 23:29:18,405 INFO L226 Difference]: Without dead ends: 16158 [2021-11-12 23:29:18,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 1311 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:29:18,428 INFO L933 BasicCegarLoop]: 4454 mSDtfsCounter, 2107 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2789.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2107 SdHoareTripleChecker+Valid, 6782 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.81ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2915.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:18,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2107 Valid, 6782 Invalid, 87 Unknown, 0 Unchecked, 8.81ms Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 1 Unknown, 0 Unchecked, 2915.15ms Time] [2021-11-12 23:29:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16158 states. [2021-11-12 23:29:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16158 to 16152. [2021-11-12 23:29:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16152 states, 11768 states have (on average 1.3616587355540448) internal successors, (16024), 11773 states have internal predecessors, (16024), 3604 states have call successors, (3604), 778 states have call predecessors, (3604), 778 states have return successors, (3604), 3600 states have call predecessors, (3604), 3604 states have call successors, (3604) [2021-11-12 23:29:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16152 states to 16152 states and 23232 transitions. [2021-11-12 23:29:19,389 INFO L78 Accepts]: Start accepts. Automaton has 16152 states and 23232 transitions. Word has length 334 [2021-11-12 23:29:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:19,390 INFO L470 AbstractCegarLoop]: Abstraction has 16152 states and 23232 transitions. [2021-11-12 23:29:19,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-12 23:29:19,390 INFO L276 IsEmpty]: Start isEmpty. Operand 16152 states and 23232 transitions. [2021-11-12 23:29:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-12 23:29:19,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:19,402 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 17, 17, 17, 17, 17, 17, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:29:19,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:19,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:19,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:19,809 INFO L402 AbstractCegarLoop]: === Iteration 19 === 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:29:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:19,809 INFO L85 PathProgramCache]: Analyzing trace with hash -963414369, now seen corresponding path program 1 times [2021-11-12 23:29:19,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:19,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815534909] [2021-11-12 23:29:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:19,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:19,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:19,816 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:19,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:29:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:29:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 503 proven. 3 refuted. 0 times theorem prover too weak. 1384 trivial. 0 not checked. [2021-11-12 23:29:41,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 52 proven. 12 refuted. 0 times theorem prover too weak. 1826 trivial. 0 not checked. [2021-11-12 23:29:44,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:44,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815534909] [2021-11-12 23:29:44,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815534909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:44,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [602268142] [2021-11-12 23:29:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:44,313 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:44,319 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:44,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:29:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:48,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:48,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 1562 trivial. 0 not checked. [2021-11-12 23:29:49,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 1851 trivial. 0 not checked. [2021-11-12 23:29:50,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [602268142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:50,745 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:50,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [17, 17] total 24 [2021-11-12 23:29:50,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066393232] [2021-11-12 23:29:50,746 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:50,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:29:50,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:29:50,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:29:50,747 INFO L87 Difference]: Start difference. First operand 16152 states and 23232 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-12 23:29:53,243 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 23:29:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:59,821 INFO L93 Difference]: Finished difference Result 39678 states and 57091 transitions. [2021-11-12 23:29:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:29:59,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 359 [2021-11-12 23:29:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:59,902 INFO L225 Difference]: With dead ends: 39678 [2021-11-12 23:29:59,902 INFO L226 Difference]: Without dead ends: 24955 [2021-11-12 23:29:59,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1432 GetRequests, 1410 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:29:59,946 INFO L933 BasicCegarLoop]: 5025 mSDtfsCounter, 4663 mSDsluCounter, 3917 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 361 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6935.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4663 SdHoareTripleChecker+Valid, 8942 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.06ms SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7538.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:59,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4663 Valid, 8942 Invalid, 1155 Unknown, 0 Unchecked, 23.06ms Time], IncrementalHoareTripleChecker [361 Valid, 793 Invalid, 1 Unknown, 0 Unchecked, 7538.74ms Time] [2021-11-12 23:29:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24955 states. [2021-11-12 23:30:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24955 to 24947. [2021-11-12 23:30:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24947 states, 18199 states have (on average 1.3626572888620254) internal successors, (24799), 18204 states have internal predecessors, (24799), 5548 states have call successors, (5548), 1198 states have call predecessors, (5548), 1198 states have return successors, (5548), 5544 states have call predecessors, (5548), 5548 states have call successors, (5548) [2021-11-12 23:30:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24947 states to 24947 states and 35895 transitions. [2021-11-12 23:30:01,638 INFO L78 Accepts]: Start accepts. Automaton has 24947 states and 35895 transitions. Word has length 359 [2021-11-12 23:30:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:01,639 INFO L470 AbstractCegarLoop]: Abstraction has 24947 states and 35895 transitions. [2021-11-12 23:30:01,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-12 23:30:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 24947 states and 35895 transitions. [2021-11-12 23:30:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-12 23:30:01,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:01,657 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 17, 17, 17, 17, 17, 17, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-12 23:30:01,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:01,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:02,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:02,058 INFO L402 AbstractCegarLoop]: === Iteration 20 === 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:30:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:02,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2145338177, now seen corresponding path program 1 times [2021-11-12 23:30:02,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:02,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185045387] [2021-11-12 23:30:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:02,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:02,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:02,066 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:02,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:30:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:22,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:30:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 603 proven. 3 refuted. 0 times theorem prover too weak. 1420 trivial. 0 not checked. [2021-11-12 23:30:24,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 73 proven. 18 refuted. 0 times theorem prover too weak. 1935 trivial. 0 not checked. [2021-11-12 23:30:26,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:26,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185045387] [2021-11-12 23:30:26,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185045387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:26,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1891449467] [2021-11-12 23:30:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:26,596 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:30:26,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:30:26,597 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:30:26,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:30:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:30,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:30:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 1927 trivial. 0 not checked. [2021-11-12 23:30:31,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2005 trivial. 0 not checked. [2021-11-12 23:30:32,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1891449467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:32,725 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:30:32,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [17, 17] total 25 [2021-11-12 23:30:32,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160290680] [2021-11-12 23:30:32,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:32,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:30:32,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:30:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:30:32,728 INFO L87 Difference]: Start difference. First operand 24947 states and 35895 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 23:30:35,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:37,762 INFO L93 Difference]: Finished difference Result 55418 states and 79742 transitions. [2021-11-12 23:30:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:30:37,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 381 [2021-11-12 23:30:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:37,868 INFO L225 Difference]: With dead ends: 55418 [2021-11-12 23:30:37,868 INFO L226 Difference]: Without dead ends: 31900 [2021-11-12 23:30:37,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1520 GetRequests, 1497 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:30:37,924 INFO L933 BasicCegarLoop]: 4453 mSDtfsCounter, 2033 mSDsluCounter, 11213 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2931.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2033 SdHoareTripleChecker+Valid, 15666 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.01ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3078.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:37,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2033 Valid, 15666 Invalid, 112 Unknown, 0 Unchecked, 20.01ms Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 1 Unknown, 0 Unchecked, 3078.79ms Time] [2021-11-12 23:30:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31900 states. [2021-11-12 23:30:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31900 to 31884. [2021-11-12 23:30:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31884 states, 23204 states have (on average 1.362868470953284) internal successors, (31624), 23211 states have internal predecessors, (31624), 7127 states have call successors, (7127), 1546 states have call predecessors, (7127), 1551 states have return successors, (7132), 7126 states have call predecessors, (7132), 7127 states have call successors, (7132) [2021-11-12 23:30:40,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31884 states to 31884 states and 45883 transitions. [2021-11-12 23:30:40,523 INFO L78 Accepts]: Start accepts. Automaton has 31884 states and 45883 transitions. Word has length 381 [2021-11-12 23:30:40,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:40,523 INFO L470 AbstractCegarLoop]: Abstraction has 31884 states and 45883 transitions. [2021-11-12 23:30:40,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 23:30:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31884 states and 45883 transitions. [2021-11-12 23:30:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-11-12 23:30:40,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:40,550 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 17, 17, 17, 17, 17, 17, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-12 23:30:40,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:40,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:40,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:40,960 INFO L402 AbstractCegarLoop]: === Iteration 21 === 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:30:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:40,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1644408224, now seen corresponding path program 1 times [2021-11-12 23:30:40,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:40,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861484795] [2021-11-12 23:30:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:40,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:40,968 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:40,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:31:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 2912 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:31:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 603 proven. 3 refuted. 0 times theorem prover too weak. 1420 trivial. 0 not checked. [2021-11-12 23:31:03,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 73 proven. 18 refuted. 0 times theorem prover too weak. 1935 trivial. 0 not checked. [2021-11-12 23:31:05,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:05,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861484795] [2021-11-12 23:31:05,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861484795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:05,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814156562] [2021-11-12 23:31:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:05,428 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:05,438 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:05,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 23:31:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:09,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 2912 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:31:09,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 1927 trivial. 0 not checked. [2021-11-12 23:31:10,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2005 trivial. 0 not checked. [2021-11-12 23:31:11,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814156562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:11,624 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:31:11,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [17, 17] total 25 [2021-11-12 23:31:11,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685308782] [2021-11-12 23:31:11,625 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:11,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:31:11,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:11,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:31:11,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:31:11,626 INFO L87 Difference]: Start difference. First operand 31884 states and 45883 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 3 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 23:31:14,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:17,103 INFO L93 Difference]: Finished difference Result 69302 states and 99738 transitions. [2021-11-12 23:31:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:31:17,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 3 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 382 [2021-11-12 23:31:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:17,205 INFO L225 Difference]: With dead ends: 69302 [2021-11-12 23:31:17,205 INFO L226 Difference]: Without dead ends: 38847 [2021-11-12 23:31:17,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1524 GetRequests, 1501 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:31:17,266 INFO L933 BasicCegarLoop]: 4457 mSDtfsCounter, 2035 mSDsluCounter, 11219 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2895.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 15676 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.67ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3025.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:17,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2035 Valid, 15676 Invalid, 121 Unknown, 0 Unchecked, 21.67ms Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 1 Unknown, 0 Unchecked, 3025.41ms Time] [2021-11-12 23:31:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38847 states. [2021-11-12 23:31:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38847 to 38831. [2021-11-12 23:31:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38831 states, 28219 states have (on average 1.362876076402424) internal successors, (38459), 28228 states have internal predecessors, (38459), 8706 states have call successors, (8706), 1894 states have call predecessors, (8706), 1904 states have return successors, (8716), 8708 states have call predecessors, (8716), 8706 states have call successors, (8716) [2021-11-12 23:31:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38831 states to 38831 states and 55881 transitions. [2021-11-12 23:31:20,554 INFO L78 Accepts]: Start accepts. Automaton has 38831 states and 55881 transitions. Word has length 382 [2021-11-12 23:31:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:20,554 INFO L470 AbstractCegarLoop]: Abstraction has 38831 states and 55881 transitions. [2021-11-12 23:31:20,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 3 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 23:31:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 38831 states and 55881 transitions. [2021-11-12 23:31:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-12 23:31:20,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:20,582 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 17, 17, 17, 17, 17, 17, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-12 23:31:20,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:20,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-12 23:31:21,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:21,003 INFO L402 AbstractCegarLoop]: === Iteration 22 === 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:31:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash -306829666, now seen corresponding path program 1 times [2021-11-12 23:31:21,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:21,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461571655] [2021-11-12 23:31:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:21,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:21,013 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:21,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:31:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:31:40,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 603 proven. 3 refuted. 0 times theorem prover too weak. 1420 trivial. 0 not checked. [2021-11-12 23:31:43,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 73 proven. 18 refuted. 0 times theorem prover too weak. 1935 trivial. 0 not checked. [2021-11-12 23:31:45,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:45,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461571655] [2021-11-12 23:31:45,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461571655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:45,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [941152111] [2021-11-12 23:31:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:45,245 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:45,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:45,246 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:45,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd59ce2-69d0-4c7b-8030-29ea67af43f9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:31:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:49,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:31:49,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 1927 trivial. 0 not checked. [2021-11-12 23:31:50,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2005 trivial. 0 not checked. [2021-11-12 23:31:51,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [941152111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:51,462 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:31:51,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [17, 17] total 25 [2021-11-12 23:31:51,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121104143] [2021-11-12 23:31:51,462 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:51,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:31:51,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:51,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:31:51,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:31:51,464 INFO L87 Difference]: Start difference. First operand 38831 states and 55881 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 3 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 23:31:53,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []