./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-wan-farsync.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs --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 3dcd453e519a411dcaaa8ea095e5544a2fd8cdb9a31e662fc6de670ff7f7c541 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:45:36,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:45:36,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:45:36,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:45:36,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:45:36,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:45:36,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:45:36,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:45:36,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:45:36,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:45:36,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:45:36,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:45:36,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:45:36,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:45:36,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:45:36,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:45:36,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:45:36,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:45:36,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:45:36,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:45:36,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:45:36,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:45:36,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:45:36,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:45:36,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:45:36,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:45:36,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:45:36,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:45:36,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:45:36,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:45:36,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:45:36,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:45:36,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:45:36,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:45:36,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:45:36,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:45:36,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:45:36,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:45:36,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:45:36,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:45:36,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:45:36,807 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:45:36,839 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:45:36,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:45:36,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:45:36,841 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:45:36,842 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:45:36,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:45:36,843 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:45:36,843 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:45:36,843 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:45:36,844 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:45:36,844 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:45:36,844 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:45:36,845 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:45:36,845 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:45:36,845 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:45:36,846 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:45:36,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:45:36,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:45:36,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:45:36,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:45:36,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:45:36,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:45:36,849 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:45:36,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:45:36,849 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:45:36,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:45:36,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:45:36,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:45:36,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:45:36,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:45:36,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:45:36,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:45:36,852 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:45:36,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:45:36,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:45:36,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:45:36,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:45:36,854 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_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dcd453e519a411dcaaa8ea095e5544a2fd8cdb9a31e662fc6de670ff7f7c541 [2021-11-19 14:45:37,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:45:37,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:45:37,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:45:37,214 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:45:37,215 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:45:37,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-19 14:45:37,332 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data/165864bff/fe2c80b46f6e44be90f114c5271f957d/FLAG92abd9457 [2021-11-19 14:45:38,620 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:45:38,622 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-19 14:45:38,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data/165864bff/fe2c80b46f6e44be90f114c5271f957d/FLAG92abd9457 [2021-11-19 14:45:38,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data/165864bff/fe2c80b46f6e44be90f114c5271f957d [2021-11-19 14:45:38,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:45:38,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:45:38,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:38,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:45:38,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:45:38,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:38" (1/1) ... [2021-11-19 14:45:38,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d3d20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:38, skipping insertion in model container [2021-11-19 14:45:38,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:38" (1/1) ... [2021-11-19 14:45:38,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:45:39,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:45:42,877 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[320934,320947] [2021-11-19 14:45:42,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321103,321116] [2021-11-19 14:45:42,882 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321270,321283] [2021-11-19 14:45:42,883 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321438,321451] [2021-11-19 14:45:42,919 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:42,976 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) [2021-11-19 14:45:42,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@200d6093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:42, skipping insertion in model container [2021-11-19 14:45:42,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:42,977 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:45:42,980 INFO L158 Benchmark]: Toolchain (without parser) took 4090.18ms. Allocated memory is still 121.6MB. Free memory was 92.8MB in the beginning and 64.0MB in the end (delta: 28.8MB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. [2021-11-19 14:45:42,981 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 92.3MB. Free memory was 44.4MB in the beginning and 44.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:45:42,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4087.14ms. Allocated memory is still 121.6MB. Free memory was 92.8MB in the beginning and 64.0MB in the end (delta: 28.8MB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. [2021-11-19 14:45:42,983 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 92.3MB. Free memory was 44.4MB in the beginning and 44.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4087.14ms. Allocated memory is still 121.6MB. Free memory was 92.8MB in the beginning and 64.0MB in the end (delta: 28.8MB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6024]: 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_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs --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 3dcd453e519a411dcaaa8ea095e5544a2fd8cdb9a31e662fc6de670ff7f7c541 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:45:45,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:45:45,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:45:46,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:45:46,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:45:46,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:45:46,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:45:46,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:45:46,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:45:46,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:45:46,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:45:46,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:45:46,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:45:46,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:45:46,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:45:46,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:45:46,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:45:46,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:45:46,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:45:46,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:45:46,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:45:46,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:45:46,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:45:46,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:45:46,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:45:46,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:45:46,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:45:46,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:45:46,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:45:46,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:45:46,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:45:46,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:45:46,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:45:46,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:45:46,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:45:46,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:45:46,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:45:46,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:45:46,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:45:46,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:45:46,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:45:46,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:45:46,233 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:45:46,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:45:46,236 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:45:46,236 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:45:46,236 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:45:46,236 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:45:46,237 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:45:46,237 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:45:46,237 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:45:46,238 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:45:46,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:45:46,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:45:46,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:45:46,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:45:46,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:45:46,242 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:45:46,242 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:45:46,243 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:45:46,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:45:46,243 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:45:46,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:45:46,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:45:46,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:45:46,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:45:46,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:45:46,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:45:46,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:45:46,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:45:46,246 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:45:46,246 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:46,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:45:46,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:45:46,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:45:46,247 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_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dcd453e519a411dcaaa8ea095e5544a2fd8cdb9a31e662fc6de670ff7f7c541 [2021-11-19 14:45:46,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:45:46,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:45:46,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:45:46,795 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:45:46,796 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:45:46,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-19 14:45:46,897 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data/a575bbd5d/5e4c17d7208d4e8caf5d3efec3de5394/FLAGbf752e2d1 [2021-11-19 14:45:48,244 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:45:48,245 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-19 14:45:48,309 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data/a575bbd5d/5e4c17d7208d4e8caf5d3efec3de5394/FLAGbf752e2d1 [2021-11-19 14:45:48,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/data/a575bbd5d/5e4c17d7208d4e8caf5d3efec3de5394 [2021-11-19 14:45:48,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:45:48,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:45:48,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:48,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:45:48,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:45:48,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0dfede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48, skipping insertion in model container [2021-11-19 14:45:48,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:45:48,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:45:52,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[320934,320947] [2021-11-19 14:45:52,597 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321103,321116] [2021-11-19 14:45:52,598 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321270,321283] [2021-11-19 14:45:52,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321438,321451] [2021-11-19 14:45:52,622 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:52,690 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:45:52,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:45:53,263 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[320934,320947] [2021-11-19 14:45:53,263 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321103,321116] [2021-11-19 14:45:53,264 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321270,321283] [2021-11-19 14:45:53,265 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321438,321451] [2021-11-19 14:45:53,272 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:53,322 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:45:53,907 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[320934,320947] [2021-11-19 14:45:53,907 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321103,321116] [2021-11-19 14:45:53,908 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321270,321283] [2021-11-19 14:45:53,909 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321438,321451] [2021-11-19 14:45:53,934 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:54,287 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:45:54,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54 WrapperNode [2021-11-19 14:45:54,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:54,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:45:54,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:45:54,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:45:54,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:54,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:54,883 INFO L137 Inliner]: procedures = 432, calls = 1969, calls flagged for inlining = 195, calls inlined = 179, statements flattened = 5082 [2021-11-19 14:45:54,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:45:54,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:45:54,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:45:54,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:45:54,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:54,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:54,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:54,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:55,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:55,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:55,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:55,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:45:55,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:45:55,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:45:55,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:45:55,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (1/1) ... [2021-11-19 14:45:55,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:45:55,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:45:55,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:45:55,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:45:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_fst_cleanup_module_12_2 [2021-11-19 14:45:55,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_fst_cleanup_module_12_2 [2021-11-19 14:45:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-19 14:45:55,381 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-19 14:45:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:45:55,382 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:45:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-19 14:45:55,382 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-19 14:45:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:45:55,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:45:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure fst_remove_one [2021-11-19 14:45:55,383 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_remove_one [2021-11-19 14:45:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-19 14:45:55,384 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-19 14:45:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 14:45:55,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 14:45:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-19 14:45:55,384 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-19 14:45:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-19 14:45:55,385 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-19 14:45:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2021-11-19 14:45:55,385 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2021-11-19 14:45:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-19 14:45:55,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-19 14:45:55,386 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_67 [2021-11-19 14:45:55,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_67 [2021-11-19 14:45:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-19 14:45:55,387 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-19 14:45:55,388 INFO L130 BoogieDeclarations]: Found specification of procedure fst_close [2021-11-19 14:45:55,388 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_close [2021-11-19 14:45:55,388 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-19 14:45:55,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-19 14:45:55,388 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-19 14:45:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-19 14:45:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-19 14:45:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-19 14:45:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 14:45:55,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 14:45:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure fst_tx_timeout [2021-11-19 14:45:55,390 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_tx_timeout [2021-11-19 14:45:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-19 14:45:55,391 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-19 14:45:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:45:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-19 14:45:55,394 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-19 14:45:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure fst_open [2021-11-19 14:45:55,394 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_open [2021-11-19 14:45:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:45:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:45:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:45:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_type_trans [2021-11-19 14:45:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_type_trans [2021-11-19 14:45:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 14:45:55,397 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 14:45:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-19 14:45:55,397 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-19 14:45:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-19 14:45:55,397 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-19 14:45:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-19 14:45:55,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-19 14:45:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-19 14:45:55,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-19 14:45:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-19 14:45:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-19 14:45:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:45:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:45:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure fst_issue_cmd [2021-11-19 14:45:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_issue_cmd [2021-11-19 14:45:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-19 14:45:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-19 14:45:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-19 14:45:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-19 14:45:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-19 14:45:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-19 14:45:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-19 14:45:55,403 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-19 14:45:55,403 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-19 14:45:55,403 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-19 14:45:55,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 14:45:55,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 14:45:55,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:45:55,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-19 14:45:55,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-19 14:45:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-19 14:45:55,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-19 14:45:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_card_lock_of_fst_card_info [2021-11-19 14:45:55,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_card_lock_of_fst_card_info [2021-11-19 14:45:55,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:45:55,407 INFO L130 BoogieDeclarations]: Found specification of procedure fst_cpureset [2021-11-19 14:45:55,407 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_cpureset [2021-11-19 14:45:55,407 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 14:45:55,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 14:45:55,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:45:55,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:45:55,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:45:55,409 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 14:45:55,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 14:45:55,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:45:55,410 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-19 14:45:55,410 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-19 14:45:55,410 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-19 14:45:55,410 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-19 14:45:55,412 INFO L130 BoogieDeclarations]: Found specification of procedure fst_q_work_item [2021-11-19 14:45:55,413 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_q_work_item [2021-11-19 14:45:55,417 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-19 14:45:55,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-19 14:45:55,417 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-19 14:45:55,417 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-19 14:45:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-19 14:45:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-19 14:45:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-19 14:45:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-19 14:45:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-19 14:45:55,427 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-19 14:45:55,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:45:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-19 14:45:55,428 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-19 14:45:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-19 14:45:55,428 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-19 14:45:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:45:55,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:45:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:45:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:45:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:45:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:45:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:45:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:45:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:45:55,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:45:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 14:45:55,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 14:45:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-19 14:45:55,431 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-19 14:45:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:45:55,431 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:45:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 14:45:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 14:45:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-19 14:45:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-19 14:45:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-19 14:45:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-19 14:45:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:45:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-11-19 14:45:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-11-19 14:45:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:45:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2021-11-19 14:45:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2021-11-19 14:45:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:45:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:45:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:45:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:45:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:45:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-19 14:45:55,435 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-19 14:45:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-19 14:45:55,435 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-19 14:45:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-19 14:45:55,436 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-19 14:45:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-19 14:45:55,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-19 14:45:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-19 14:45:55,436 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-19 14:45:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-19 14:45:55,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-19 14:45:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure farsync_type_trans [2021-11-19 14:45:55,437 INFO L138 BoogieDeclarations]: Found implementation of procedure farsync_type_trans [2021-11-19 14:45:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-19 14:45:55,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-19 14:45:55,438 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 14:45:55,438 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 14:45:55,438 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 14:45:55,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 14:45:55,438 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_fst_work_q_lock [2021-11-19 14:45:55,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_fst_work_q_lock [2021-11-19 14:45:55,439 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:45:55,439 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:45:55,439 INFO L130 BoogieDeclarations]: Found specification of procedure fst_disable_intr [2021-11-19 14:45:55,439 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_disable_intr [2021-11-19 14:45:55,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:45:55,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:45:55,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:45:55,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:45:55,440 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 14:45:55,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 14:45:55,440 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-19 14:45:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-19 14:45:55,441 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-19 14:45:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-19 14:45:55,441 INFO L130 BoogieDeclarations]: Found specification of procedure do_bottom_half_tx [2021-11-19 14:45:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure do_bottom_half_tx [2021-11-19 14:45:55,441 INFO L130 BoogieDeclarations]: Found specification of procedure fst_process_rx_status [2021-11-19 14:45:55,442 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_process_rx_status [2021-11-19 14:45:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-19 14:45:55,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-19 14:45:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-19 14:45:55,442 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-19 14:45:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2021-11-19 14:45:55,443 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2021-11-19 14:45:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-19 14:45:55,443 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-19 14:45:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-19 14:45:55,443 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-19 14:45:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-19 14:45:55,444 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-19 14:45:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure fst_clear_intr [2021-11-19 14:45:55,444 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_clear_intr [2021-11-19 14:45:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-19 14:45:55,444 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-19 14:45:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-19 14:45:55,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-19 14:45:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-19 14:45:55,445 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-19 14:45:56,500 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:45:56,508 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:45:56,717 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:46:32,930 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-19 14:46:33,014 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:46:33,043 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:46:33,043 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:46:33,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:33 BoogieIcfgContainer [2021-11-19 14:46:33,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:46:33,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:46:33,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:46:33,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:46:33,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:45:48" (1/3) ... [2021-11-19 14:46:33,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689c4dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:33, skipping insertion in model container [2021-11-19 14:46:33,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:54" (2/3) ... [2021-11-19 14:46:33,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689c4dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:33, skipping insertion in model container [2021-11-19 14:46:33,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:33" (3/3) ... [2021-11-19 14:46:33,061 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-19 14:46:33,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:46:33,068 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-19 14:46:33,145 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:46:33,153 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 [2021-11-19 14:46:33,154 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-19 14:46:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 1831 states, 1250 states have (on average 1.2888) internal successors, (1611), 1264 states have internal predecessors, (1611), 488 states have call successors, (488), 91 states have call predecessors, (488), 90 states have return successors, (481), 479 states have call predecessors, (481), 481 states have call successors, (481) [2021-11-19 14:46:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:46:33,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:33,243 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:33,244 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)] === [2021-11-19 14:46:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:33,251 INFO L85 PathProgramCache]: Analyzing trace with hash -354153155, now seen corresponding path program 1 times [2021-11-19 14:46:33,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:33,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052458109] [2021-11-19 14:46:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:33,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:33,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:33,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:33,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:46:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:34,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:46:34,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:46:35,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 14:46:35,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:35,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052458109] [2021-11-19 14:46:35,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052458109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:35,667 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:35,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:46:35,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213670082] [2021-11-19 14:46:35,670 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:35,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:46:35,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:46:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:46:35,733 INFO L87 Difference]: Start difference. First operand has 1831 states, 1250 states have (on average 1.2888) internal successors, (1611), 1264 states have internal predecessors, (1611), 488 states have call successors, (488), 91 states have call predecessors, (488), 90 states have return successors, (481), 479 states have call predecessors, (481), 481 states have call successors, (481) Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-19 14:46:37,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:46:47,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:47,017 INFO L93 Difference]: Finished difference Result 7100 states and 10188 transitions. [2021-11-19 14:46:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:46:47,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2021-11-19 14:46:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:47,121 INFO L225 Difference]: With dead ends: 7100 [2021-11-19 14:46:47,121 INFO L226 Difference]: Without dead ends: 5265 [2021-11-19 14:46:47,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:46:47,161 INFO L933 BasicCegarLoop]: 3496 mSDtfsCounter, 6479 mSDsluCounter, 4007 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 918 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6479 SdHoareTripleChecker+Valid, 7503 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:47,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6479 Valid, 7503 Invalid, 1908 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [918 Valid, 989 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2021-11-19 14:46:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-11-19 14:46:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5238. [2021-11-19 14:46:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 3609 states have (on average 1.287337212524245) internal successors, (4646), 3647 states have internal predecessors, (4646), 1363 states have call successors, (1363), 264 states have call predecessors, (1363), 263 states have return successors, (1359), 1353 states have call predecessors, (1359), 1359 states have call successors, (1359) [2021-11-19 14:46:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 7368 transitions. [2021-11-19 14:46:47,804 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 7368 transitions. Word has length 83 [2021-11-19 14:46:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:47,808 INFO L470 AbstractCegarLoop]: Abstraction has 5238 states and 7368 transitions. [2021-11-19 14:46:47,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-19 14:46:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 7368 transitions. [2021-11-19 14:46:47,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 14:46:47,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:47,825 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:47,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:48,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:48,040 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)] === [2021-11-19 14:46:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1396464343, now seen corresponding path program 1 times [2021-11-19 14:46:48,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:48,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6996493] [2021-11-19 14:46:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:48,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:48,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:48,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:48,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:46:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:49,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:46:49,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:46:49,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 14:46:50,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:50,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6996493] [2021-11-19 14:46:50,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6996493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:50,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:50,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:46:50,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277022765] [2021-11-19 14:46:50,057 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:50,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:46:50,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:46:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:46:50,065 INFO L87 Difference]: Start difference. First operand 5238 states and 7368 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-19 14:46:52,160 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:46:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:57,166 INFO L93 Difference]: Finished difference Result 14970 states and 21098 transitions. [2021-11-19 14:46:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:46:57,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2021-11-19 14:46:57,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:57,248 INFO L225 Difference]: With dead ends: 14970 [2021-11-19 14:46:57,248 INFO L226 Difference]: Without dead ends: 9747 [2021-11-19 14:46:57,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:46:57,278 INFO L933 BasicCegarLoop]: 3346 mSDtfsCounter, 4268 mSDsluCounter, 4019 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4268 SdHoareTripleChecker+Valid, 7365 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:57,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4268 Valid, 7365 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1035 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2021-11-19 14:46:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9747 states. [2021-11-19 14:46:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9747 to 9695. [2021-11-19 14:46:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9695 states, 6753 states have (on average 1.2980897378942693) internal successors, (8766), 6820 states have internal predecessors, (8766), 2434 states have call successors, (2434), 508 states have call predecessors, (2434), 505 states have return successors, (2430), 2416 states have call predecessors, (2430), 2430 states have call successors, (2430) [2021-11-19 14:46:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9695 states to 9695 states and 13630 transitions. [2021-11-19 14:46:57,953 INFO L78 Accepts]: Start accepts. Automaton has 9695 states and 13630 transitions. Word has length 93 [2021-11-19 14:46:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:57,953 INFO L470 AbstractCegarLoop]: Abstraction has 9695 states and 13630 transitions. [2021-11-19 14:46:57,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-19 14:46:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 9695 states and 13630 transitions. [2021-11-19 14:46:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:46:57,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:57,958 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:57,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:58,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:58,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === 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)] === [2021-11-19 14:46:58,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:58,180 INFO L85 PathProgramCache]: Analyzing trace with hash -701589471, now seen corresponding path program 1 times [2021-11-19 14:46:58,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:58,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739786124] [2021-11-19 14:46:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:58,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:58,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:58,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:58,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:46:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:59,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:46:59,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:46:59,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 14:46:59,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:59,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739786124] [2021-11-19 14:46:59,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739786124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:59,732 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:59,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:46:59,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518031082] [2021-11-19 14:46:59,733 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:59,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:46:59,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:59,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:46:59,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:46:59,734 INFO L87 Difference]: Start difference. First operand 9695 states and 13630 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:47:01,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:47:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:02,684 INFO L93 Difference]: Finished difference Result 26953 states and 37763 transitions. [2021-11-19 14:47:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:47:02,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2021-11-19 14:47:02,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:02,822 INFO L225 Difference]: With dead ends: 26953 [2021-11-19 14:47:02,822 INFO L226 Difference]: Without dead ends: 17273 [2021-11-19 14:47:02,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:47:02,867 INFO L933 BasicCegarLoop]: 2987 mSDtfsCounter, 2287 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2287 SdHoareTripleChecker+Valid, 5485 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:02,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2287 Valid, 5485 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:47:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17273 states. [2021-11-19 14:47:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17273 to 17241. [2021-11-19 14:47:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17241 states, 12014 states have (on average 1.2884135175628433) internal successors, (15479), 12139 states have internal predecessors, (15479), 4273 states have call successors, (4273), 956 states have call predecessors, (4273), 951 states have return successors, (4269), 4232 states have call predecessors, (4269), 4269 states have call successors, (4269) [2021-11-19 14:47:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17241 states to 17241 states and 24021 transitions. [2021-11-19 14:47:04,083 INFO L78 Accepts]: Start accepts. Automaton has 17241 states and 24021 transitions. Word has length 91 [2021-11-19 14:47:04,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:04,084 INFO L470 AbstractCegarLoop]: Abstraction has 17241 states and 24021 transitions. [2021-11-19 14:47:04,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:47:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 17241 states and 24021 transitions. [2021-11-19 14:47:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 14:47:04,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:04,086 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:04,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:04,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:04,307 INFO L402 AbstractCegarLoop]: === Iteration 4 === 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)] === [2021-11-19 14:47:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash -447177211, now seen corresponding path program 1 times [2021-11-19 14:47:04,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:04,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073822294] [2021-11-19 14:47:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:04,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:04,310 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:04,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:47:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:47:05,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:47:05,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 14:47:05,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:05,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073822294] [2021-11-19 14:47:05,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073822294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:05,788 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:47:05,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:47:05,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234752848] [2021-11-19 14:47:05,788 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:05,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:47:05,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:05,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:47:05,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:47:05,789 INFO L87 Difference]: Start difference. First operand 17241 states and 24021 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:47:07,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:47:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:08,951 INFO L93 Difference]: Finished difference Result 44216 states and 61284 transitions. [2021-11-19 14:47:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:47:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2021-11-19 14:47:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:09,206 INFO L225 Difference]: With dead ends: 44216 [2021-11-19 14:47:09,206 INFO L226 Difference]: Without dead ends: 26990 [2021-11-19 14:47:09,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:47:09,267 INFO L933 BasicCegarLoop]: 2927 mSDtfsCounter, 1896 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 5440 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:09,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1896 Valid, 5440 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:47:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26990 states. [2021-11-19 14:47:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26990 to 26952. [2021-11-19 14:47:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26952 states, 18746 states have (on average 1.2844873573028912) internal successors, (24079), 18957 states have internal predecessors, (24079), 6542 states have call successors, (6542), 1670 states have call predecessors, (6542), 1661 states have return successors, (6550), 6449 states have call predecessors, (6550), 6538 states have call successors, (6550) [2021-11-19 14:47:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26952 states to 26952 states and 37171 transitions. [2021-11-19 14:47:10,880 INFO L78 Accepts]: Start accepts. Automaton has 26952 states and 37171 transitions. Word has length 95 [2021-11-19 14:47:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:10,880 INFO L470 AbstractCegarLoop]: Abstraction has 26952 states and 37171 transitions. [2021-11-19 14:47:10,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:47:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 26952 states and 37171 transitions. [2021-11-19 14:47:10,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:47:10,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:10,887 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:10,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:11,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:11,107 INFO L402 AbstractCegarLoop]: === Iteration 5 === 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)] === [2021-11-19 14:47:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash 595683630, now seen corresponding path program 1 times [2021-11-19 14:47:11,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:11,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997469673] [2021-11-19 14:47:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:11,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:11,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:11,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:47:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:12,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:47:12,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:47:12,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 14:47:12,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:12,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997469673] [2021-11-19 14:47:12,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997469673] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:12,525 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:47:12,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:47:12,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743124690] [2021-11-19 14:47:12,525 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:12,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:47:12,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:47:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:47:12,526 INFO L87 Difference]: Start difference. First operand 26952 states and 37171 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:47:14,612 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:47:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:16,593 INFO L93 Difference]: Finished difference Result 78148 states and 107591 transitions. [2021-11-19 14:47:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:47:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2021-11-19 14:47:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:16,854 INFO L225 Difference]: With dead ends: 78148 [2021-11-19 14:47:16,854 INFO L226 Difference]: Without dead ends: 51211 [2021-11-19 14:47:16,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:47:16,939 INFO L933 BasicCegarLoop]: 3269 mSDtfsCounter, 2419 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2419 SdHoareTripleChecker+Valid, 5768 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:16,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2419 Valid, 5768 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:47:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51211 states. [2021-11-19 14:47:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51211 to 51161. [2021-11-19 14:47:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51161 states, 35673 states have (on average 1.2755865780842655) internal successors, (45504), 36091 states have internal predecessors, (45504), 12266 states have call successors, (12266), 3236 states have call predecessors, (12266), 3219 states have return successors, (12286), 12069 states have call predecessors, (12286), 12262 states have call successors, (12286) [2021-11-19 14:47:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51161 states to 51161 states and 70056 transitions. [2021-11-19 14:47:20,310 INFO L78 Accepts]: Start accepts. Automaton has 51161 states and 70056 transitions. Word has length 92 [2021-11-19 14:47:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:20,312 INFO L470 AbstractCegarLoop]: Abstraction has 51161 states and 70056 transitions. [2021-11-19 14:47:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:47:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 51161 states and 70056 transitions. [2021-11-19 14:47:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:47:20,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:20,314 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-11-19 14:47:20,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:20,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === 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)] === [2021-11-19 14:47:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1037125969, now seen corresponding path program 1 times [2021-11-19 14:47:20,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:20,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158115800] [2021-11-19 14:47:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:20,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:20,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:20,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:20,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:47:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:47:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-19 14:47:22,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-19 14:47:22,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:22,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158115800] [2021-11-19 14:47:22,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158115800] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:22,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:47:22,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:47:22,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350460027] [2021-11-19 14:47:22,271 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:22,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:47:22,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:47:22,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:47:22,273 INFO L87 Difference]: Start difference. First operand 51161 states and 70056 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:47:24,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:47:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:31,183 INFO L93 Difference]: Finished difference Result 182410 states and 249380 transitions. [2021-11-19 14:47:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:47:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 108 [2021-11-19 14:47:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:32,111 INFO L225 Difference]: With dead ends: 182410 [2021-11-19 14:47:32,111 INFO L226 Difference]: Without dead ends: 131264 [2021-11-19 14:47:32,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:47:32,296 INFO L933 BasicCegarLoop]: 4062 mSDtfsCounter, 4537 mSDsluCounter, 5381 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4537 SdHoareTripleChecker+Valid, 9443 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:32,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4537 Valid, 9443 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 874 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 14:47:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131264 states. [2021-11-19 14:47:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131264 to 131116. [2021-11-19 14:47:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 91340 states have (on average 1.2688197941756076) internal successors, (115894), 92622 states have internal predecessors, (115894), 31470 states have call successors, (31470), 8480 states have call predecessors, (31470), 8303 states have return successors, (31570), 30657 states have call predecessors, (31570), 31466 states have call successors, (31570) [2021-11-19 14:47:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 178934 transitions. [2021-11-19 14:47:38,938 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 178934 transitions. Word has length 108 [2021-11-19 14:47:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:38,939 INFO L470 AbstractCegarLoop]: Abstraction has 131116 states and 178934 transitions. [2021-11-19 14:47:38,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:47:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 178934 transitions. [2021-11-19 14:47:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 14:47:38,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:38,945 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-11-19 14:47:38,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:39,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:39,167 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)] === [2021-11-19 14:47:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:39,168 INFO L85 PathProgramCache]: Analyzing trace with hash 154527813, now seen corresponding path program 1 times [2021-11-19 14:47:39,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:39,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722112554] [2021-11-19 14:47:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:39,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:39,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:39,170 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:39,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:47:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:47:40,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-19 14:47:40,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-19 14:47:40,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:40,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722112554] [2021-11-19 14:47:40,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722112554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:40,866 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:47:40,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:47:40,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133957415] [2021-11-19 14:47:40,866 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:40,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:47:40,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:47:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:47:40,867 INFO L87 Difference]: Start difference. First operand 131116 states and 178934 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 14:47:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:45,760 INFO L93 Difference]: Finished difference Result 262356 states and 358125 transitions. [2021-11-19 14:47:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:47:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 150 [2021-11-19 14:47:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:46,482 INFO L225 Difference]: With dead ends: 262356 [2021-11-19 14:47:46,482 INFO L226 Difference]: Without dead ends: 131332 [2021-11-19 14:47:47,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:47:47,276 INFO L933 BasicCegarLoop]: 2549 mSDtfsCounter, 2 mSDsluCounter, 5094 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7643 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:47,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7643 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:47:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131332 states. [2021-11-19 14:47:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131332 to 131332. [2021-11-19 14:47:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131332 states, 91556 states have (on average 1.268185591332081) internal successors, (116110), 92838 states have internal predecessors, (116110), 31470 states have call successors, (31470), 8480 states have call predecessors, (31470), 8303 states have return successors, (31570), 30657 states have call predecessors, (31570), 31466 states have call successors, (31570) [2021-11-19 14:47:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131332 states to 131332 states and 179150 transitions. [2021-11-19 14:47:52,927 INFO L78 Accepts]: Start accepts. Automaton has 131332 states and 179150 transitions. Word has length 150 [2021-11-19 14:47:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:52,927 INFO L470 AbstractCegarLoop]: Abstraction has 131332 states and 179150 transitions. [2021-11-19 14:47:52,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 14:47:52,928 INFO L276 IsEmpty]: Start isEmpty. Operand 131332 states and 179150 transitions. [2021-11-19 14:47:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 14:47:52,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:52,931 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 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] [2021-11-19 14:47:52,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:53,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:53,155 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)] === [2021-11-19 14:47:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash 535749181, now seen corresponding path program 1 times [2021-11-19 14:47:53,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:53,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254553328] [2021-11-19 14:47:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:53,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:53,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:53,159 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:53,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:47:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:47:54,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 76 proven. 4 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-19 14:47:54,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-19 14:47:54,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:54,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254553328] [2021-11-19 14:47:54,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254553328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:54,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [572364537] [2021-11-19 14:47:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:54,959 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:54,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:54,963 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:54,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456242f2-f7b7-4954-839e-ae95600f229b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 14:47:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:47:55,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-19 14:47:56,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-19 14:47:57,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [572364537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:57,099 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:47:57,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [5, 5] total 13 [2021-11-19 14:47:57,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665968492] [2021-11-19 14:47:57,100 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:57,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:47:57,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:47:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:47:57,102 INFO L87 Difference]: Start difference. First operand 131332 states and 179150 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32)