./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:36:08,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:36:08,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:36:08,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:36:08,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:36:08,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:36:08,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:36:08,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:36:08,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:36:08,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:36:08,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:36:08,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:36:08,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:36:08,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:36:08,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:36:08,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:36:08,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:36:08,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:36:08,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:36:08,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:36:08,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:36:08,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:36:08,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:36:08,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:36:08,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:36:08,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:36:08,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:36:08,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:36:08,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:36:08,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:36:08,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:36:08,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:36:08,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:36:08,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:36:08,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:36:08,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:36:08,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:36:08,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:36:08,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:36:08,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:36:08,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:36:08,788 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:36:08,844 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:36:08,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:36:08,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:36:08,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:36:08,845 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:36:08,845 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:36:08,846 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:36:08,846 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:36:08,846 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:36:08,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:36:08,846 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:36:08,853 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:36:08,853 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:36:08,853 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:36:08,854 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:36:08,854 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:36:08,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:36:08,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:36:08,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:36:08,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:36:08,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:36:08,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:36:08,856 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:36:08,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:36:08,857 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:36:08,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:36:08,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:36:08,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:36:08,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:36:08,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:36:08,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:36:08,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:36:08,861 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:36:08,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:36:08,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:36:08,862 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:36:08,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:36:08,863 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_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 [2021-11-12 23:36:09,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:36:09,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:36:09,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:36:09,274 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:36:09,275 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:36:09,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:36:09,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data/b09283ea9/5e2a329333374544a9d8b7ba7aed49dc/FLAG1b6892422 [2021-11-12 23:36:10,380 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:36:10,382 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:36:10,439 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data/b09283ea9/5e2a329333374544a9d8b7ba7aed49dc/FLAG1b6892422 [2021-11-12 23:36:10,784 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data/b09283ea9/5e2a329333374544a9d8b7ba7aed49dc [2021-11-12 23:36:10,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:36:10,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:36:10,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:10,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:36:10,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:36:10,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:10" (1/1) ... [2021-11-12 23:36:10,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c2f9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:10, skipping insertion in model container [2021-11-12 23:36:10,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:10" (1/1) ... [2021-11-12 23:36:10,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:36:10,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:36:11,886 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:11,920 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:12,507 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:12,677 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:12,687 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:12,693 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:12,771 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:12,795 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:12,800 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:12,823 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:12,845 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:13,273 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-12 23:36:13,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:13,451 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:36:13,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bbb72e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:13, skipping insertion in model container [2021-11-12 23:36:13,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:13,452 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:36:13,456 INFO L158 Benchmark]: Toolchain (without parser) took 2665.07ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 66.0MB in the beginning and 58.7MB in the end (delta: 7.3MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. [2021-11-12 23:36:13,457 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory is still 72.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:36:13,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2662.25ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 65.8MB in the beginning and 59.3MB in the end (delta: 6.5MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. [2021-11-12 23:36:13,461 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory is still 72.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2662.25ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 65.8MB in the beginning and 59.3MB in the end (delta: 6.5MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3876]: 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_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:36:15,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:36:15,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:36:16,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:36:16,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:36:16,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:36:16,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:36:16,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:36:16,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:36:16,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:36:16,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:36:16,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:36:16,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:36:16,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:36:16,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:36:16,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:36:16,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:36:16,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:36:16,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:36:16,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:36:16,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:36:16,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:36:16,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:36:16,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:36:16,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:36:16,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:36:16,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:36:16,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:36:16,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:36:16,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:36:16,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:36:16,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:36:16,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:36:16,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:36:16,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:36:16,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:36:16,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:36:16,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:36:16,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:36:16,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:36:16,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:36:16,135 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:36:16,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:36:16,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:36:16,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:36:16,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:36:16,189 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:36:16,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:36:16,189 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:36:16,189 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:36:16,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:36:16,190 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:36:16,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:36:16,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:36:16,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:36:16,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:36:16,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:36:16,194 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:36:16,194 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:36:16,195 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:36:16,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:36:16,195 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:36:16,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:36:16,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:36:16,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:36:16,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:36:16,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:36:16,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:36:16,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:36:16,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:36:16,197 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:36:16,198 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:36:16,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:36:16,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:36:16,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:36:16,199 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_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 [2021-11-12 23:36:16,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:36:16,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:36:16,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:36:16,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:36:16,692 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:36:16,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:36:16,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data/cdcb15c0f/96d5a3eb5d7a4027868d375ad441aec1/FLAGeaa9f4361 [2021-11-12 23:36:17,912 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:36:17,912 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:36:17,950 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data/cdcb15c0f/96d5a3eb5d7a4027868d375ad441aec1/FLAGeaa9f4361 [2021-11-12 23:36:18,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/data/cdcb15c0f/96d5a3eb5d7a4027868d375ad441aec1 [2021-11-12 23:36:18,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:36:18,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:36:18,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:18,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:36:18,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:36:18,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:18" (1/1) ... [2021-11-12 23:36:18,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3715406a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:18, skipping insertion in model container [2021-11-12 23:36:18,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:18" (1/1) ... [2021-11-12 23:36:18,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:36:18,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:36:20,582 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-12 23:36:20,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:20,778 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:36:20,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:36:21,444 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-12 23:36:21,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:21,512 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:36:21,937 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-12 23:36:21,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:22,213 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:36:22,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22 WrapperNode [2021-11-12 23:36:22,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:22,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:36:22,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:36:22,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:36:22,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:22,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:22,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:36:22,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:36:22,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:36:22,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:36:22,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:22,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:22,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:22,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:23,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:23,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:23,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:23,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:36:23,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:36:23,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:36:23,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:36:23,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (1/1) ... [2021-11-12 23:36:23,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:36:23,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:36:23,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:36:23,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:36:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-12 23:36:23,512 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-12 23:36:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-12 23:36:23,513 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-12 23:36:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:36:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-12 23:36:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-12 23:36:23,513 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-12 23:36:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:36:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-12 23:36:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:36:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:36:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:36:23,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:36:23,515 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:36:23,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:36:23,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:36:23,515 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:36:23,516 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-12 23:36:23,516 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-12 23:36:23,516 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-12 23:36:23,516 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-12 23:36:23,516 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-12 23:36:23,516 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-12 23:36:23,517 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-12 23:36:23,517 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-12 23:36:23,517 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-12 23:36:23,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-12 23:36:23,517 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:36:23,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:36:23,518 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-12 23:36:23,518 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-12 23:36:23,518 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-12 23:36:23,518 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-12 23:36:23,519 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-12 23:36:23,519 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-12 23:36:23,519 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 23:36:23,519 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 23:36:23,519 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-12 23:36:23,520 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-12 23:36:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 23:36:23,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 23:36:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-12 23:36:23,520 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-12 23:36:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-12 23:36:23,521 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-12 23:36:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:36:23,521 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:36:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:36:23,522 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:36:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 23:36:23,522 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 23:36:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-12 23:36:23,522 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-12 23:36:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-12 23:36:23,523 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-12 23:36:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-12 23:36:23,523 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-12 23:36:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:36:23,524 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-12 23:36:23,524 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-12 23:36:23,524 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:36:23,524 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-12 23:36:23,524 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-12 23:36:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-12 23:36:23,525 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-12 23:36:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:36:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-12 23:36:23,525 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-12 23:36:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-12 23:36:23,526 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-12 23:36:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-12 23:36:23,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-12 23:36:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 23:36:23,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 23:36:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-12 23:36:23,527 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-12 23:36:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure acm_softint [2021-11-12 23:36:23,527 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_softint [2021-11-12 23:36:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:36:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:36:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:36:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:36:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:36:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:36:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:36:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:36:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:36:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:36:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-12 23:36:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-12 23:36:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-12 23:36:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-12 23:36:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 23:36:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 23:36:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-12 23:36:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-12 23:36:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-12 23:36:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-12 23:36:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-12 23:36:23,532 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-12 23:36:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-12 23:36:23,532 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-12 23:36:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2021-11-12 23:36:23,532 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2021-11-12 23:36:23,533 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_from_anchor [2021-11-12 23:36:23,533 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_from_anchor [2021-11-12 23:36:23,533 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-12 23:36:23,533 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-12 23:36:23,533 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 23:36:23,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 23:36:23,534 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-12 23:36:23,534 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-12 23:36:23,534 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-12 23:36:23,534 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-12 23:36:23,535 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-12 23:36:23,535 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-12 23:36:23,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:36:23,535 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:36:23,535 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-12 23:36:23,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-12 23:36:23,536 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-12 23:36:23,536 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-12 23:36:23,536 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-12 23:36:23,536 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-12 23:36:23,537 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-12 23:36:23,537 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-12 23:36:23,537 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-12 23:36:23,537 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-12 23:36:23,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-12 23:36:23,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-12 23:36:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-12 23:36:23,538 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-12 23:36:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-12 23:36:23,538 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-12 23:36:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-12 23:36:23,539 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-12 23:36:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:36:23,539 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:36:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure acm_set_control [2021-11-12 23:36:23,539 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_set_control [2021-11-12 23:36:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-12 23:36:23,540 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-12 23:36:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-12 23:36:23,540 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-12 23:36:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-12 23:36:23,540 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-12 23:36:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-12 23:36:23,541 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-12 23:36:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:36:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:36:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:36:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:36:23,542 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-12 23:36:23,542 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-12 23:36:23,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:36:23,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:36:23,542 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-12 23:36:23,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-12 23:36:23,543 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-12 23:36:23,543 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-12 23:36:23,543 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-12 23:36:23,543 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-12 23:36:23,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 23:36:23,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 23:36:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:36:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 23:36:23,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 23:36:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:36:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 23:36:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:36:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:36:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:36:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-12 23:36:23,545 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-12 23:36:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_dtr_rts [2021-11-12 23:36:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_dtr_rts [2021-11-12 23:36:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-12 23:36:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-12 23:36:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-12 23:36:23,547 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-12 23:36:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-12 23:36:23,547 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-12 23:36:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-12 23:36:23,547 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-12 23:36:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-12 23:36:23,548 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-12 23:36:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-12 23:36:23,548 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-12 23:36:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-12 23:36:23,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-12 23:36:23,549 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-12 23:36:23,549 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-12 23:36:23,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:36:23,549 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-12 23:36:23,549 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-12 23:36:23,550 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-12 23:36:23,550 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-12 23:36:23,550 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-12 23:36:23,550 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-12 23:36:23,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:36:23,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:36:23,551 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-12 23:36:23,551 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-12 23:36:23,551 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-12 23:36:23,551 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-12 23:36:25,135 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:37:32,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:37:32,342 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:37:32,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:37:32 BoogieIcfgContainer [2021-11-12 23:37:32,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:37:32,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:37:32,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:37:32,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:37:32,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:36:18" (1/3) ... [2021-11-12 23:37:32,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1444679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:37:32, skipping insertion in model container [2021-11-12 23:37:32,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:22" (2/3) ... [2021-11-12 23:37:32,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1444679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:37:32, skipping insertion in model container [2021-11-12 23:37:32,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:37:32" (3/3) ... [2021-11-12 23:37:32,355 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:37:32,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:37:32,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:37:32,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:37:32,446 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:37:32,447 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:37:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 1522 states, 1092 states have (on average 1.3424908424908424) internal successors, (1466), 1108 states have internal predecessors, (1466), 343 states have call successors, (343), 86 states have call predecessors, (343), 85 states have return successors, (334), 334 states have call predecessors, (334), 334 states have call successors, (334) [2021-11-12 23:37:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-12 23:37:32,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:32,562 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:32,562 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1379845110, now seen corresponding path program 1 times [2021-11-12 23:37:32,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:32,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601971131] [2021-11-12 23:37:32,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:32,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:32,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:32,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:32,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:37:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 5032 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:37:41,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 497 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-12 23:37:43,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 1461 trivial. 0 not checked. [2021-11-12 23:37:45,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:45,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601971131] [2021-11-12 23:37:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601971131] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:37:45,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:37:45,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 23:37:45,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144666222] [2021-11-12 23:37:45,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:45,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:37:45,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:37:45,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:37:45,362 INFO L87 Difference]: Start difference. First operand has 1522 states, 1092 states have (on average 1.3424908424908424) internal successors, (1466), 1108 states have internal predecessors, (1466), 343 states have call successors, (343), 86 states have call predecessors, (343), 85 states have return successors, (334), 334 states have call predecessors, (334), 334 states have call successors, (334) Second operand has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 23:37:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:45,540 INFO L93 Difference]: Finished difference Result 3039 states and 4351 transitions. [2021-11-12 23:37:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:37:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 354 [2021-11-12 23:37:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:45,577 INFO L225 Difference]: With dead ends: 3039 [2021-11-12 23:37:45,578 INFO L226 Difference]: Without dead ends: 1499 [2021-11-12 23:37:45,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:37:45,600 INFO L933 BasicCegarLoop]: 2139 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:45,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 16.39ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:37:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-11-12 23:37:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1499. [2021-11-12 23:37:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1082 states have (on average 1.3336414048059149) internal successors, (1443), 1087 states have internal predecessors, (1443), 332 states have call successors, (332), 85 states have call predecessors, (332), 84 states have return successors, (331), 331 states have call predecessors, (331), 331 states have call successors, (331) [2021-11-12 23:37:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 2106 transitions. [2021-11-12 23:37:45,776 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 2106 transitions. Word has length 354 [2021-11-12 23:37:45,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:45,777 INFO L470 AbstractCegarLoop]: Abstraction has 1499 states and 2106 transitions. [2021-11-12 23:37:45,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 23:37:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 2106 transitions. [2021-11-12 23:37:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-12 23:37:45,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:45,793 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:45,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:46,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:46,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1666470674, now seen corresponding path program 1 times [2021-11-12 23:37:46,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:46,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574075316] [2021-11-12 23:37:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:46,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:46,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:46,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:46,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:37:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:55,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 5032 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:37:56,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 1463 trivial. 0 not checked. [2021-11-12 23:37:58,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2021-11-12 23:38:00,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:00,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574075316] [2021-11-12 23:38:00,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574075316] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:00,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:38:00,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 23:38:00,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221480525] [2021-11-12 23:38:00,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:00,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:38:00,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:38:00,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:00,638 INFO L87 Difference]: Start difference. First operand 1499 states and 2106 transitions. Second operand has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 23:38:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:01,831 INFO L93 Difference]: Finished difference Result 2972 states and 4184 transitions. [2021-11-12 23:38:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:38:01,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 354 [2021-11-12 23:38:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:01,853 INFO L225 Difference]: With dead ends: 2972 [2021-11-12 23:38:01,853 INFO L226 Difference]: Without dead ends: 1500 [2021-11-12 23:38:01,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:38:01,864 INFO L933 BasicCegarLoop]: 2095 mSDtfsCounter, 6 mSDsluCounter, 8355 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 763.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10450 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.72ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 815.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:01,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10450 Invalid, 85 Unknown, 0 Unchecked, 48.72ms Time], IncrementalHoareTripleChecker [10 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 815.43ms Time] [2021-11-12 23:38:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-11-12 23:38:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1500. [2021-11-12 23:38:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1083 states have (on average 1.3333333333333333) internal successors, (1444), 1088 states have internal predecessors, (1444), 332 states have call successors, (332), 85 states have call predecessors, (332), 84 states have return successors, (331), 331 states have call predecessors, (331), 331 states have call successors, (331) [2021-11-12 23:38:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2107 transitions. [2021-11-12 23:38:01,962 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2107 transitions. Word has length 354 [2021-11-12 23:38:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:01,967 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 2107 transitions. [2021-11-12 23:38:01,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 23:38:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2107 transitions. [2021-11-12 23:38:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-12 23:38:01,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:01,981 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:02,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:02,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:02,194 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:02,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1573672362, now seen corresponding path program 1 times [2021-11-12 23:38:02,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:02,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431866311] [2021-11-12 23:38:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:02,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:02,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:02,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:02,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:38:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 5072 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:38:12,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 1533 trivial. 0 not checked. [2021-11-12 23:38:14,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1547 trivial. 0 not checked. [2021-11-12 23:38:16,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:16,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431866311] [2021-11-12 23:38:16,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431866311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:16,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [529152964] [2021-11-12 23:38:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:16,909 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:16,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:16,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 23:38:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:22,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 5072 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:22,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-12 23:38:23,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-12 23:38:24,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [529152964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:24,529 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:24,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:38:24,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606356197] [2021-11-12 23:38:24,530 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:24,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:24,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:24,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:24,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:24,532 INFO L87 Difference]: Start difference. First operand 1500 states and 2107 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 23:38:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:26,261 INFO L93 Difference]: Finished difference Result 4275 states and 5990 transitions. [2021-11-12 23:38:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 362 [2021-11-12 23:38:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:26,284 INFO L225 Difference]: With dead ends: 4275 [2021-11-12 23:38:26,285 INFO L226 Difference]: Without dead ends: 2828 [2021-11-12 23:38:26,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1444 GetRequests, 1434 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:26,293 INFO L933 BasicCegarLoop]: 2386 mSDtfsCounter, 1914 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1430.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 4396 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.99ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1577.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:26,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1914 Valid, 4396 Invalid, 23 Unknown, 0 Unchecked, 16.99ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 1577.77ms Time] [2021-11-12 23:38:26,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-11-12 23:38:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2823. [2021-11-12 23:38:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2049 states have (on average 1.3372376769155685) internal successors, (2740), 2060 states have internal predecessors, (2740), 607 states have call successors, (607), 167 states have call predecessors, (607), 166 states have return successors, (606), 605 states have call predecessors, (606), 606 states have call successors, (606) [2021-11-12 23:38:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 3953 transitions. [2021-11-12 23:38:26,504 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 3953 transitions. Word has length 362 [2021-11-12 23:38:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:26,508 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 3953 transitions. [2021-11-12 23:38:26,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 23:38:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 3953 transitions. [2021-11-12 23:38:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-12 23:38:26,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:26,521 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:26,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:26,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:26,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:26,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:26,945 INFO L85 PathProgramCache]: Analyzing trace with hash 400458956, now seen corresponding path program 1 times [2021-11-12 23:38:26,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:26,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290752824] [2021-11-12 23:38:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:26,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:26,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:26,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:26,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:38:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 5141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:38:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 1533 trivial. 0 not checked. [2021-11-12 23:38:38,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1547 trivial. 0 not checked. [2021-11-12 23:38:41,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:41,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290752824] [2021-11-12 23:38:41,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290752824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:41,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [745991810] [2021-11-12 23:38:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:41,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:41,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:41,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:41,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:38:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 5141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:47,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-12 23:38:48,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-12 23:38:49,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [745991810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:49,575 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:49,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:38:49,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854300651] [2021-11-12 23:38:49,576 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:49,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:49,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:49,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:49,578 INFO L87 Difference]: Start difference. First operand 2823 states and 3953 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:38:51,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:51,546 INFO L93 Difference]: Finished difference Result 7155 states and 9994 transitions. [2021-11-12 23:38:51,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:51,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 362 [2021-11-12 23:38:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:51,585 INFO L225 Difference]: With dead ends: 7155 [2021-11-12 23:38:51,585 INFO L226 Difference]: Without dead ends: 4385 [2021-11-12 23:38:51,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1444 GetRequests, 1434 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:51,599 INFO L933 BasicCegarLoop]: 2450 mSDtfsCounter, 1249 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1653.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 4460 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1773.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:51,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 4460 Invalid, 23 Unknown, 0 Unchecked, 13.76ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 1773.02ms Time] [2021-11-12 23:38:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4385 states. [2021-11-12 23:38:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4385 to 4380. [2021-11-12 23:38:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 3221 states have (on average 1.3464762496119218) internal successors, (4337), 3237 states have internal predecessors, (4337), 887 states have call successors, (887), 272 states have call predecessors, (887), 271 states have return successors, (886), 884 states have call predecessors, (886), 886 states have call successors, (886) [2021-11-12 23:38:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 6110 transitions. [2021-11-12 23:38:51,861 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 6110 transitions. Word has length 362 [2021-11-12 23:38:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:51,862 INFO L470 AbstractCegarLoop]: Abstraction has 4380 states and 6110 transitions. [2021-11-12 23:38:51,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:38:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 6110 transitions. [2021-11-12 23:38:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-12 23:38:51,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:51,872 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:51,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:52,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:52,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:52,295 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1608125497, now seen corresponding path program 1 times [2021-11-12 23:38:52,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:52,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125601256] [2021-11-12 23:38:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:52,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:52,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:52,312 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:52,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:39:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:02,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 5092 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:39:02,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 1533 trivial. 0 not checked. [2021-11-12 23:39:04,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1547 trivial. 0 not checked. [2021-11-12 23:39:07,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:07,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125601256] [2021-11-12 23:39:07,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125601256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:07,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2072361801] [2021-11-12 23:39:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:07,404 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:07,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:07,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:39:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:13,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 5092 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:39:13,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-12 23:39:14,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-12 23:39:15,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2072361801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:15,117 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:15,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:39:15,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756041699] [2021-11-12 23:39:15,118 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:15,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:39:15,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:15,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:39:15,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:39:15,120 INFO L87 Difference]: Start difference. First operand 4380 states and 6110 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:39:16,143 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:17,646 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:18,904 INFO L93 Difference]: Finished difference Result 11085 states and 15382 transitions. [2021-11-12 23:39:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:39:18,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 362 [2021-11-12 23:39:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:18,967 INFO L225 Difference]: With dead ends: 11085 [2021-11-12 23:39:18,967 INFO L226 Difference]: Without dead ends: 6758 [2021-11-12 23:39:18,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1444 GetRequests, 1434 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:39:18,993 INFO L933 BasicCegarLoop]: 2558 mSDtfsCounter, 1461 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3352.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 4505 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.73ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3529.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:18,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1461 Valid, 4505 Invalid, 86 Unknown, 0 Unchecked, 14.73ms Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 3529.75ms Time] [2021-11-12 23:39:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6758 states. [2021-11-12 23:39:19,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6758 to 6755. [2021-11-12 23:39:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 4950 states have (on average 1.3357575757575757) internal successors, (6612), 4974 states have internal predecessors, (6612), 1365 states have call successors, (1365), 440 states have call predecessors, (1365), 439 states have return successors, (1364), 1362 states have call predecessors, (1364), 1364 states have call successors, (1364) [2021-11-12 23:39:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 9341 transitions. [2021-11-12 23:39:19,406 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 9341 transitions. Word has length 362 [2021-11-12 23:39:19,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:19,408 INFO L470 AbstractCegarLoop]: Abstraction has 6755 states and 9341 transitions. [2021-11-12 23:39:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:39:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 9341 transitions. [2021-11-12 23:39:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-11-12 23:39:19,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:19,429 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:19,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:19,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:19,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:19,855 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1699374415, now seen corresponding path program 1 times [2021-11-12 23:39:19,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:19,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725943955] [2021-11-12 23:39:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:19,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:19,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:19,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:19,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:39:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:30,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 5378 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:39:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 280 proven. 1 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2021-11-12 23:39:32,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1746 trivial. 0 not checked. [2021-11-12 23:39:36,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:36,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725943955] [2021-11-12 23:39:36,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725943955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:36,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [277251837] [2021-11-12 23:39:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:36,005 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:36,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:36,027 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:36,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:39:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 5378 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:39:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2021-11-12 23:39:42,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2021-11-12 23:39:43,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [277251837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:43,671 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:43,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:39:43,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46321629] [2021-11-12 23:39:43,672 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:43,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:39:43,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:39:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:39:43,675 INFO L87 Difference]: Start difference. First operand 6755 states and 9341 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 23:39:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:44,853 INFO L93 Difference]: Finished difference Result 13442 states and 18592 transitions. [2021-11-12 23:39:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:39:44,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 420 [2021-11-12 23:39:44,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:44,919 INFO L225 Difference]: With dead ends: 13442 [2021-11-12 23:39:44,919 INFO L226 Difference]: Without dead ends: 6755 [2021-11-12 23:39:44,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1676 GetRequests, 1666 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:39:44,949 INFO L933 BasicCegarLoop]: 2104 mSDtfsCounter, 2102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 790.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2102 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.52ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 897.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:44,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2102 Valid, 2104 Invalid, 3 Unknown, 0 Unchecked, 8.52ms Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 897.33ms Time] [2021-11-12 23:39:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-11-12 23:39:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6701. [2021-11-12 23:39:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6701 states, 4910 states have (on average 1.3364562118126273) internal successors, (6562), 4936 states have internal predecessors, (6562), 1357 states have call successors, (1357), 434 states have call predecessors, (1357), 433 states have return successors, (1356), 1352 states have call predecessors, (1356), 1356 states have call successors, (1356) [2021-11-12 23:39:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6701 states to 6701 states and 9275 transitions. [2021-11-12 23:39:45,344 INFO L78 Accepts]: Start accepts. Automaton has 6701 states and 9275 transitions. Word has length 420 [2021-11-12 23:39:45,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:45,347 INFO L470 AbstractCegarLoop]: Abstraction has 6701 states and 9275 transitions. [2021-11-12 23:39:45,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 23:39:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 6701 states and 9275 transitions. [2021-11-12 23:39:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-12 23:39:45,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:45,359 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:45,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:45,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:45,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:45,775 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1283468776, now seen corresponding path program 1 times [2021-11-12 23:39:45,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:45,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049110449] [2021-11-12 23:39:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:45,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:45,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:45,790 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:45,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:39:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 5262 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:39:55,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 476 proven. 1 refuted. 0 times theorem prover too weak. 1558 trivial. 0 not checked. [2021-11-12 23:39:58,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1964 trivial. 0 not checked. [2021-11-12 23:40:01,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:01,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049110449] [2021-11-12 23:40:01,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049110449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:01,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [275941784] [2021-11-12 23:40:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:01,440 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:01,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:01,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:01,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:40:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:07,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 5262 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:40:07,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-12 23:40:15,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-12 23:40:17,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [275941784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:17,663 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:40:17,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:40:17,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703891336] [2021-11-12 23:40:17,664 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:17,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:17,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:17,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:40:17,666 INFO L87 Difference]: Start difference. First operand 6701 states and 9275 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2021-11-12 23:40:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:17,946 INFO L93 Difference]: Finished difference Result 6928 states and 9517 transitions. [2021-11-12 23:40:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) Word has length 437 [2021-11-12 23:40:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:18,024 INFO L225 Difference]: With dead ends: 6928 [2021-11-12 23:40:18,025 INFO L226 Difference]: Without dead ends: 6925 [2021-11-12 23:40:18,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1744 GetRequests, 1734 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:40:18,032 INFO L933 BasicCegarLoop]: 2123 mSDtfsCounter, 1819 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:18,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1819 Valid, 2305 Invalid, 5 Unknown, 0 Unchecked, 8.74ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 46.94ms Time] [2021-11-12 23:40:18,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2021-11-12 23:40:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 6925. [2021-11-12 23:40:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6925 states, 5063 states have (on average 1.3314240568832707) internal successors, (6741), 5089 states have internal predecessors, (6741), 1384 states have call successors, (1384), 478 states have call predecessors, (1384), 477 states have return successors, (1383), 1379 states have call predecessors, (1383), 1383 states have call successors, (1383) [2021-11-12 23:40:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6925 states to 6925 states and 9508 transitions. [2021-11-12 23:40:18,415 INFO L78 Accepts]: Start accepts. Automaton has 6925 states and 9508 transitions. Word has length 437 [2021-11-12 23:40:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:18,416 INFO L470 AbstractCegarLoop]: Abstraction has 6925 states and 9508 transitions. [2021-11-12 23:40:18,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2021-11-12 23:40:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6925 states and 9508 transitions. [2021-11-12 23:40:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-12 23:40:18,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:18,427 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:18,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:18,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:18,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:18,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash -170299339, now seen corresponding path program 1 times [2021-11-12 23:40:18,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:18,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165536368] [2021-11-12 23:40:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:18,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:18,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:18,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:40:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 5282 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:40:29,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 476 proven. 1 refuted. 0 times theorem prover too weak. 1556 trivial. 0 not checked. [2021-11-12 23:40:31,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-12 23:40:34,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:34,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165536368] [2021-11-12 23:40:34,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165536368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:34,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [698067014] [2021-11-12 23:40:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:34,742 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:34,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:34,743 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:34,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:40:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 5282 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:40,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-11-12 23:40:42,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2021-11-12 23:40:43,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [698067014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:43,883 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:40:43,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 15 [2021-11-12 23:40:43,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800333660] [2021-11-12 23:40:43,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:43,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:40:43,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:43,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:40:43,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:40:43,886 INFO L87 Difference]: Start difference. First operand 6925 states and 9508 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-12 23:40:46,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:47,346 INFO L93 Difference]: Finished difference Result 13790 states and 18934 transitions. [2021-11-12 23:40:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:40:47,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 437 [2021-11-12 23:40:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:47,381 INFO L225 Difference]: With dead ends: 13790 [2021-11-12 23:40:47,381 INFO L226 Difference]: Without dead ends: 6925 [2021-11-12 23:40:47,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1745 GetRequests, 1731 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:40:47,410 INFO L933 BasicCegarLoop]: 2104 mSDtfsCounter, 1 mSDsluCounter, 6299 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2903.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8403 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.83ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3010.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:47,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 8403 Invalid, 16 Unknown, 0 Unchecked, 14.83ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 1 Unknown, 0 Unchecked, 3010.84ms Time] [2021-11-12 23:40:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2021-11-12 23:40:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 6925. [2021-11-12 23:40:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6925 states, 5063 states have (on average 1.3298439660280466) internal successors, (6733), 5089 states have internal predecessors, (6733), 1384 states have call successors, (1384), 478 states have call predecessors, (1384), 477 states have return successors, (1383), 1379 states have call predecessors, (1383), 1383 states have call successors, (1383) [2021-11-12 23:40:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6925 states to 6925 states and 9500 transitions. [2021-11-12 23:40:47,779 INFO L78 Accepts]: Start accepts. Automaton has 6925 states and 9500 transitions. Word has length 437 [2021-11-12 23:40:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:47,780 INFO L470 AbstractCegarLoop]: Abstraction has 6925 states and 9500 transitions. [2021-11-12 23:40:47,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-12 23:40:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6925 states and 9500 transitions. [2021-11-12 23:40:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-11-12 23:40:47,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:47,792 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:47,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:48,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:48,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:48,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1055378097, now seen corresponding path program 1 times [2021-11-12 23:40:48,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:48,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974642187] [2021-11-12 23:40:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:48,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:48,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:48,227 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:48,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:40:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 5371 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:40:58,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 476 proven. 1 refuted. 0 times theorem prover too weak. 1556 trivial. 0 not checked. [2021-11-12 23:41:01,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-12 23:41:04,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:04,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974642187] [2021-11-12 23:41:04,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974642187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:04,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1583788241] [2021-11-12 23:41:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:04,905 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:04,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:04,906 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:04,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:41:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:10,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 5371 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:41:10,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-11-12 23:41:12,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2021-11-12 23:41:13,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1583788241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:13,756 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:41:13,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 14 [2021-11-12 23:41:13,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698653266] [2021-11-12 23:41:13,757 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:13,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:41:13,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:13,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:41:13,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:41:13,759 INFO L87 Difference]: Start difference. First operand 6925 states and 9500 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 3 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-12 23:41:16,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:17,523 INFO L93 Difference]: Finished difference Result 13753 states and 18876 transitions. [2021-11-12 23:41:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:41:17,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 3 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 445 [2021-11-12 23:41:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:17,559 INFO L225 Difference]: With dead ends: 13753 [2021-11-12 23:41:17,559 INFO L226 Difference]: Without dead ends: 6854 [2021-11-12 23:41:17,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1778 GetRequests, 1764 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:41:17,594 INFO L933 BasicCegarLoop]: 2101 mSDtfsCounter, 5 mSDsluCounter, 6288 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2956.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8389 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.60ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3113.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:17,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 8389 Invalid, 20 Unknown, 0 Unchecked, 20.60ms Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 3113.42ms Time] [2021-11-12 23:41:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6854 states. [2021-11-12 23:41:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6854 to 6826. [2021-11-12 23:41:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6826 states, 4991 states have (on average 1.3317972350230414) internal successors, (6647), 5020 states have internal predecessors, (6647), 1367 states have call successors, (1367), 468 states have call predecessors, (1367), 467 states have return successors, (1366), 1359 states have call predecessors, (1366), 1366 states have call successors, (1366) [2021-11-12 23:41:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6826 states to 6826 states and 9380 transitions. [2021-11-12 23:41:17,965 INFO L78 Accepts]: Start accepts. Automaton has 6826 states and 9380 transitions. Word has length 445 [2021-11-12 23:41:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:17,966 INFO L470 AbstractCegarLoop]: Abstraction has 6826 states and 9380 transitions. [2021-11-12 23:41:17,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 3 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-12 23:41:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6826 states and 9380 transitions. [2021-11-12 23:41:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-11-12 23:41:17,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:17,988 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:18,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:18,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:18,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:18,401 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:18,402 INFO L85 PathProgramCache]: Analyzing trace with hash -594099730, now seen corresponding path program 1 times [2021-11-12 23:41:18,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:18,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784614485] [2021-11-12 23:41:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:18,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:18,415 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:18,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:41:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:28,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 5420 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:41:28,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 672 proven. 1 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2021-11-12 23:41:32,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2184 trivial. 0 not checked. [2021-11-12 23:41:34,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:34,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784614485] [2021-11-12 23:41:34,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784614485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:34,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047314126] [2021-11-12 23:41:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:34,964 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:34,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:34,965 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:34,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:41:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:40,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 5420 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:41:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 595 proven. 0 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-11-12 23:41:43,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2252 trivial. 0 not checked. [2021-11-12 23:41:44,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1047314126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:44,656 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:41:44,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-12 23:41:44,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283842731] [2021-11-12 23:41:44,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:44,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:41:44,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:41:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:41:44,659 INFO L87 Difference]: Start difference. First operand 6826 states and 9380 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-12 23:41:47,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:54,968 INFO L93 Difference]: Finished difference Result 18410 states and 25218 transitions. [2021-11-12 23:41:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:41:54,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) Word has length 464 [2021-11-12 23:41:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:55,029 INFO L225 Difference]: With dead ends: 18410 [2021-11-12 23:41:55,030 INFO L226 Difference]: Without dead ends: 11652 [2021-11-12 23:41:55,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1852 GetRequests, 1841 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:41:55,054 INFO L933 BasicCegarLoop]: 2718 mSDtfsCounter, 4209 mSDsluCounter, 2377 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 513 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9264.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4209 SdHoareTripleChecker+Valid, 5095 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.98ms SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9845.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:55,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4209 Valid, 5095 Invalid, 971 Unknown, 0 Unchecked, 23.98ms Time], IncrementalHoareTripleChecker [513 Valid, 457 Invalid, 1 Unknown, 0 Unchecked, 9845.35ms Time] [2021-11-12 23:41:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11652 states. [2021-11-12 23:41:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11652 to 11582. [2021-11-12 23:41:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11582 states, 8567 states have (on average 1.3357067818372825) internal successors, (11443), 8612 states have internal predecessors, (11443), 2185 states have call successors, (2185), 830 states have call predecessors, (2185), 829 states have return successors, (2184), 2169 states have call predecessors, (2184), 2184 states have call successors, (2184) [2021-11-12 23:41:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11582 states to 11582 states and 15812 transitions. [2021-11-12 23:41:55,690 INFO L78 Accepts]: Start accepts. Automaton has 11582 states and 15812 transitions. Word has length 464 [2021-11-12 23:41:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:55,692 INFO L470 AbstractCegarLoop]: Abstraction has 11582 states and 15812 transitions. [2021-11-12 23:41:55,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-12 23:41:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 11582 states and 15812 transitions. [2021-11-12 23:41:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-11-12 23:41:55,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:55,710 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:55,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:56,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:56,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:56,130 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:56,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:56,131 INFO L85 PathProgramCache]: Analyzing trace with hash 442514555, now seen corresponding path program 1 times [2021-11-12 23:41:56,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:56,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130797780] [2021-11-12 23:41:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:56,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:56,148 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:56,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:42:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:06,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 5438 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 672 proven. 1 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2021-11-12 23:42:09,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2186 trivial. 0 not checked. [2021-11-12 23:42:12,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:12,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130797780] [2021-11-12 23:42:12,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130797780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:12,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [137850313] [2021-11-12 23:42:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:12,709 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:12,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:12,711 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:12,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:42:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:18,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 5438 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:42:18,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2021-11-12 23:42:20,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2252 trivial. 0 not checked. [2021-11-12 23:42:21,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [137850313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:21,646 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:21,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-12 23:42:21,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189501574] [2021-11-12 23:42:21,647 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:21,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:42:21,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:42:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:42:21,649 INFO L87 Difference]: Start difference. First operand 11582 states and 15812 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2021-11-12 23:42:24,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:33,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:33,546 INFO L93 Difference]: Finished difference Result 34074 states and 46676 transitions. [2021-11-12 23:42:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:42:33,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) Word has length 460 [2021-11-12 23:42:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:33,651 INFO L225 Difference]: With dead ends: 34074 [2021-11-12 23:42:33,651 INFO L226 Difference]: Without dead ends: 22560 [2021-11-12 23:42:33,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1836 GetRequests, 1825 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:42:33,687 INFO L933 BasicCegarLoop]: 3266 mSDtfsCounter, 4119 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 526 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10442.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 6156 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.70ms SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11087.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:33,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4119 Valid, 6156 Invalid, 1135 Unknown, 0 Unchecked, 22.70ms Time], IncrementalHoareTripleChecker [526 Valid, 608 Invalid, 1 Unknown, 0 Unchecked, 11087.22ms Time] [2021-11-12 23:42:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22560 states. [2021-11-12 23:42:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22560 to 22526. [2021-11-12 23:42:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22526 states, 16854 states have (on average 1.3343419959653495) internal successors, (22489), 16939 states have internal predecessors, (22489), 4049 states have call successors, (4049), 1623 states have call predecessors, (4049), 1622 states have return successors, (4048), 4017 states have call predecessors, (4048), 4048 states have call successors, (4048) [2021-11-12 23:42:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22526 states to 22526 states and 30586 transitions. [2021-11-12 23:42:34,736 INFO L78 Accepts]: Start accepts. Automaton has 22526 states and 30586 transitions. Word has length 460 [2021-11-12 23:42:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:34,737 INFO L470 AbstractCegarLoop]: Abstraction has 22526 states and 30586 transitions. [2021-11-12 23:42:34,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2021-11-12 23:42:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 22526 states and 30586 transitions. [2021-11-12 23:42:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-12 23:42:34,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:34,769 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:34,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:35,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:35,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:35,183 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash 797213022, now seen corresponding path program 1 times [2021-11-12 23:42:35,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:35,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758137570] [2021-11-12 23:42:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:35,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:35,196 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:35,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:42:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:46,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 5520 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:46,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 672 proven. 1 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-11-12 23:42:49,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2198 trivial. 0 not checked. [2021-11-12 23:42:52,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:52,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758137570] [2021-11-12 23:42:52,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758137570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:52,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1997993553] [2021-11-12 23:42:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:52,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:52,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:52,525 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:52,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:42:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:58,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 5520 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:42:58,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 602 proven. 7 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-11-12 23:43:01,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2259 trivial. 0 not checked. [2021-11-12 23:43:03,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1997993553] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:43:03,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:43:03,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7, 6] total 17 [2021-11-12 23:43:03,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709738010] [2021-11-12 23:43:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:03,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:43:03,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:43:03,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:43:03,975 INFO L87 Difference]: Start difference. First operand 22526 states and 30586 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 23:43:07,193 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 [] [2021-11-12 23:43:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:08,045 INFO L93 Difference]: Finished difference Result 45104 states and 61243 transitions. [2021-11-12 23:43:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:43:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 484 [2021-11-12 23:43:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:08,141 INFO L225 Difference]: With dead ends: 45104 [2021-11-12 23:43:08,141 INFO L226 Difference]: Without dead ends: 22629 [2021-11-12 23:43:08,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1933 GetRequests, 1917 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:43:08,189 INFO L933 BasicCegarLoop]: 2106 mSDtfsCounter, 232 mSDsluCounter, 4112 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2920.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.34ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3141.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:08,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 6218 Invalid, 11 Unknown, 0 Unchecked, 8.34ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 3141.11ms Time] [2021-11-12 23:43:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22629 states. [2021-11-12 23:43:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22629 to 22626. [2021-11-12 23:43:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22626 states, 16935 states have (on average 1.3342190729258931) internal successors, (22595), 17021 states have internal predecessors, (22595), 4062 states have call successors, (4062), 1629 states have call predecessors, (4062), 1628 states have return successors, (4061), 4029 states have call predecessors, (4061), 4061 states have call successors, (4061) [2021-11-12 23:43:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22626 states to 22626 states and 30718 transitions. [2021-11-12 23:43:09,151 INFO L78 Accepts]: Start accepts. Automaton has 22626 states and 30718 transitions. Word has length 484 [2021-11-12 23:43:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:09,152 INFO L470 AbstractCegarLoop]: Abstraction has 22626 states and 30718 transitions. [2021-11-12 23:43:09,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 23:43:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 22626 states and 30718 transitions. [2021-11-12 23:43:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-12 23:43:09,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:09,188 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:09,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:09,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:09,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:09,603 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash 252340448, now seen corresponding path program 1 times [2021-11-12 23:43:09,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:09,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189511464] [2021-11-12 23:43:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:09,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:09,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:09,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:09,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:43:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:19,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 5520 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:19,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 672 proven. 1 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-11-12 23:43:23,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2198 trivial. 0 not checked. [2021-11-12 23:43:28,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:28,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189511464] [2021-11-12 23:43:28,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189511464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:28,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [445761579] [2021-11-12 23:43:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:28,138 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:28,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:28,140 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:28,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-12 23:43:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 5520 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:43:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 602 proven. 7 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-11-12 23:43:39,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2021-11-12 23:43:45,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [445761579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:45,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485044734] [2021-11-12 23:43:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:45,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:43:45,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:43:45,218 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:43:45,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-12 23:43:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 5520 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:43:56,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 602 proven. 0 refuted. 0 times theorem prover too weak. 1667 trivial. 0 not checked. [2021-11-12 23:43:58,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2021-11-12 23:44:01,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485044734] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:01,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 23:44:01,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 10, 8, 8] total 25 [2021-11-12 23:44:01,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124717423] [2021-11-12 23:44:01,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:01,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:44:01,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:01,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:44:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:44:01,260 INFO L87 Difference]: Start difference. First operand 22626 states and 30718 transitions. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 7 states have internal predecessors, (143), 3 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 23:44:06,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:08,474 INFO L93 Difference]: Finished difference Result 45303 states and 61588 transitions. [2021-11-12 23:44:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:44:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 7 states have internal predecessors, (143), 3 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 484 [2021-11-12 23:44:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:08,597 INFO L225 Difference]: With dead ends: 45303 [2021-11-12 23:44:08,597 INFO L226 Difference]: Without dead ends: 22705 [2021-11-12 23:44:08,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2905 GetRequests, 2875 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:44:08,657 INFO L933 BasicCegarLoop]: 2100 mSDtfsCounter, 246 mSDsluCounter, 12501 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3450.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 14601 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.30ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3615.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:08,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 14601 Invalid, 46 Unknown, 0 Unchecked, 17.30ms Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 3615.66ms Time] [2021-11-12 23:44:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22705 states. [2021-11-12 23:44:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22705 to 22686. [2021-11-12 23:44:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22686 states, 16965 states have (on average 1.3334512231063955) internal successors, (22622), 17081 states have internal predecessors, (22622), 4062 states have call successors, (4062), 1629 states have call predecessors, (4062), 1658 states have return successors, (4191), 4029 states have call predecessors, (4191), 4061 states have call successors, (4191) [2021-11-12 23:44:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22686 states to 22686 states and 30875 transitions. [2021-11-12 23:44:09,870 INFO L78 Accepts]: Start accepts. Automaton has 22686 states and 30875 transitions. Word has length 484 [2021-11-12 23:44:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:09,871 INFO L470 AbstractCegarLoop]: Abstraction has 22686 states and 30875 transitions. [2021-11-12 23:44:09,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 7 states have internal predecessors, (143), 3 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 23:44:09,871 INFO L276 IsEmpty]: Start isEmpty. Operand 22686 states and 30875 transitions. [2021-11-12 23:44:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-11-12 23:44:09,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:09,916 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:10,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:10,331 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forcibly destroying the process [2021-11-12 23:44:10,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 137 [2021-11-12 23:44:10,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:10,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:10,637 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:10,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash -83193416, now seen corresponding path program 1 times [2021-11-12 23:44:10,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:10,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840200817] [2021-11-12 23:44:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:10,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:10,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:10,647 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:10,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:44:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:20,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 5561 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 784 proven. 1 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-11-12 23:44:25,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-11-12 23:44:30,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:30,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840200817] [2021-11-12 23:44:30,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840200817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:30,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [949997786] [2021-11-12 23:44:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:30,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:30,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:44:30,135 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:44:30,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 23:44:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:35,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 5561 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:44:35,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2417 trivial. 0 not checked. [2021-11-12 23:44:37,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2417 trivial. 0 not checked. [2021-11-12 23:44:39,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [949997786] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:39,434 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:44:39,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 17 [2021-11-12 23:44:39,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923050469] [2021-11-12 23:44:39,435 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:39,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:44:39,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:44:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:44:39,437 INFO L87 Difference]: Start difference. First operand 22686 states and 30875 transitions. Second operand has 8 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 4 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-12 23:44:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:40,735 INFO L93 Difference]: Finished difference Result 22721 states and 30909 transitions. [2021-11-12 23:44:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:44:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 4 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 504 [2021-11-12 23:44:40,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:40,805 INFO L225 Difference]: With dead ends: 22721 [2021-11-12 23:44:40,806 INFO L226 Difference]: Without dead ends: 22718 [2021-11-12 23:44:40,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2013 GetRequests, 1997 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:44:40,817 INFO L933 BasicCegarLoop]: 2088 mSDtfsCounter, 17 mSDsluCounter, 10398 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 471.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12486 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.39ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 478.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:40,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 12486 Invalid, 39 Unknown, 0 Unchecked, 12.39ms Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 478.67ms Time] [2021-11-12 23:44:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22718 states. [2021-11-12 23:44:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22718 to 22718. [2021-11-12 23:44:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22718 states, 16989 states have (on average 1.3326269939372535) internal successors, (22640), 17105 states have internal predecessors, (22640), 4062 states have call successors, (4062), 1637 states have call predecessors, (4062), 1666 states have return successors, (4191), 4029 states have call predecessors, (4191), 4061 states have call successors, (4191) [2021-11-12 23:44:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22718 states to 22718 states and 30893 transitions. [2021-11-12 23:44:41,770 INFO L78 Accepts]: Start accepts. Automaton has 22718 states and 30893 transitions. Word has length 504 [2021-11-12 23:44:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:41,771 INFO L470 AbstractCegarLoop]: Abstraction has 22718 states and 30893 transitions. [2021-11-12 23:44:41,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 4 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-12 23:44:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22718 states and 30893 transitions. [2021-11-12 23:44:41,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-11-12 23:44:41,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:41,818 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:41,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:42,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:42,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:42,239 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1274233473, now seen corresponding path program 1 times [2021-11-12 23:44:42,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:42,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037580252] [2021-11-12 23:44:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:42,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:42,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:42,250 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:42,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:44:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:52,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 5703 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 784 proven. 1 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2021-11-12 23:44:57,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2370 trivial. 0 not checked. [2021-11-12 23:45:02,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037580252] [2021-11-12 23:45:02,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037580252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:45:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1347775069] [2021-11-12 23:45:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:02,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:02,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:45:02,166 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:45:02,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:45:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 5703 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:07,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2021-11-12 23:45:10,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2021-11-12 23:45:12,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1347775069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:12,062 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:45:12,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 15 [2021-11-12 23:45:12,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166078631] [2021-11-12 23:45:12,063 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:12,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:45:12,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:12,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:45:12,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:45:12,064 INFO L87 Difference]: Start difference. First operand 22718 states and 30893 transitions. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-12 23:45:14,709 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:31,100 INFO L93 Difference]: Finished difference Result 62241 states and 85317 transitions. [2021-11-12 23:45:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:45:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 540 [2021-11-12 23:45:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:31,244 INFO L225 Difference]: With dead ends: 62241 [2021-11-12 23:45:31,244 INFO L226 Difference]: Without dead ends: 39691 [2021-11-12 23:45:31,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2162 GetRequests, 2145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:45:31,308 INFO L933 BasicCegarLoop]: 4057 mSDtfsCounter, 5153 mSDsluCounter, 9852 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 408 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16193.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5153 SdHoareTripleChecker+Valid, 13909 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.06ms SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16760.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:31,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5153 Valid, 13909 Invalid, 1278 Unknown, 0 Unchecked, 37.06ms Time], IncrementalHoareTripleChecker [408 Valid, 869 Invalid, 1 Unknown, 0 Unchecked, 16760.69ms Time] [2021-11-12 23:45:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39691 states. [2021-11-12 23:45:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39691 to 22734. [2021-11-12 23:45:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22734 states, 17005 states have (on average 1.3323140252866803) internal successors, (22656), 17121 states have internal predecessors, (22656), 4062 states have call successors, (4062), 1637 states have call predecessors, (4062), 1666 states have return successors, (4191), 4029 states have call predecessors, (4191), 4061 states have call successors, (4191) [2021-11-12 23:45:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22734 states to 22734 states and 30909 transitions. [2021-11-12 23:45:32,678 INFO L78 Accepts]: Start accepts. Automaton has 22734 states and 30909 transitions. Word has length 540 [2021-11-12 23:45:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:32,679 INFO L470 AbstractCegarLoop]: Abstraction has 22734 states and 30909 transitions. [2021-11-12 23:45:32,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-12 23:45:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 22734 states and 30909 transitions. [2021-11-12 23:45:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2021-11-12 23:45:32,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:32,727 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:32,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:32,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:33,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:33,143 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1611320480, now seen corresponding path program 1 times [2021-11-12 23:45:33,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:33,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162903316] [2021-11-12 23:45:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:33,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:33,154 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:33,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:45:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:43,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 5821 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:45:43,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 784 proven. 1 refuted. 0 times theorem prover too weak. 1675 trivial. 0 not checked. [2021-11-12 23:45:49,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2021-11-12 23:45:54,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:54,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162903316] [2021-11-12 23:45:54,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162903316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:45:54,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1771492785] [2021-11-12 23:45:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:54,274 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:54,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:45:54,274 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:45:54,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:45:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:59,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 5821 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:59,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2442 trivial. 0 not checked. [2021-11-12 23:46:03,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2442 trivial. 0 not checked. [2021-11-12 23:46:06,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1771492785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:06,359 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:46:06,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 17 [2021-11-12 23:46:06,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231534363] [2021-11-12 23:46:06,360 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:06,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:46:06,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:46:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:46:06,361 INFO L87 Difference]: Start difference. First operand 22734 states and 30909 transitions. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 4 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2021-11-12 23:46:09,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:42,030 INFO L93 Difference]: Finished difference Result 70925 states and 98837 transitions. [2021-11-12 23:46:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:46:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 4 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) Word has length 586 [2021-11-12 23:46:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:42,174 INFO L225 Difference]: With dead ends: 70925 [2021-11-12 23:46:42,174 INFO L226 Difference]: Without dead ends: 48359 [2021-11-12 23:46:42,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2351 GetRequests, 2328 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:46:42,219 INFO L933 BasicCegarLoop]: 5517 mSDtfsCounter, 6244 mSDsluCounter, 17863 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 1347 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30668.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6423 SdHoareTripleChecker+Valid, 23380 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.99ms SdHoareTripleChecker+Time, 1347 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31591.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:42,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6423 Valid, 23380 Invalid, 2883 Unknown, 0 Unchecked, 57.99ms Time], IncrementalHoareTripleChecker [1347 Valid, 1535 Invalid, 1 Unknown, 0 Unchecked, 31591.23ms Time] [2021-11-12 23:46:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48359 states. [2021-11-12 23:46:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48359 to 22910. [2021-11-12 23:46:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22910 states, 17109 states have (on average 1.331229177625811) internal successors, (22776), 17225 states have internal predecessors, (22776), 4134 states have call successors, (4134), 1637 states have call predecessors, (4134), 1666 states have return successors, (4263), 4101 states have call predecessors, (4263), 4133 states have call successors, (4263) [2021-11-12 23:46:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22910 states to 22910 states and 31173 transitions. [2021-11-12 23:46:43,591 INFO L78 Accepts]: Start accepts. Automaton has 22910 states and 31173 transitions. Word has length 586 [2021-11-12 23:46:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:43,593 INFO L470 AbstractCegarLoop]: Abstraction has 22910 states and 31173 transitions. [2021-11-12 23:46:43,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 4 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2021-11-12 23:46:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 22910 states and 31173 transitions. [2021-11-12 23:46:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2021-11-12 23:46:43,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:43,638 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:43,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-12 23:46:43,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:44,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:44,045 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash 352390433, now seen corresponding path program 1 times [2021-11-12 23:46:44,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:44,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803241546] [2021-11-12 23:46:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:44,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:44,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:44,219 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:44,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:46:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:55,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 6531 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:46:55,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 791 proven. 1 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2021-11-12 23:47:03,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 2569 trivial. 0 not checked. [2021-11-12 23:47:10,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:10,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803241546] [2021-11-12 23:47:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803241546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:10,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [745096570] [2021-11-12 23:47:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:10,171 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:10,172 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:10,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 23:47:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:15,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 6531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:47:15,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 2570 trivial. 0 not checked. [2021-11-12 23:47:18,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2630 trivial. 0 not checked. [2021-11-12 23:47:21,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [745096570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:21,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:47:21,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:47:21,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400038529] [2021-11-12 23:47:21,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:21,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:47:21,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:47:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:47:21,075 INFO L87 Difference]: Start difference. First operand 22910 states and 31173 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 2 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-12 23:47:23,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:23,865 INFO L93 Difference]: Finished difference Result 45660 states and 62157 transitions. [2021-11-12 23:47:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:47:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 2 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 781 [2021-11-12 23:47:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:23,915 INFO L225 Difference]: With dead ends: 45660 [2021-11-12 23:47:23,915 INFO L226 Difference]: Without dead ends: 22918 [2021-11-12 23:47:23,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3120 GetRequests, 3110 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:47:23,947 INFO L933 BasicCegarLoop]: 2087 mSDtfsCounter, 0 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2074.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2091.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:23,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4170 Invalid, 5 Unknown, 0 Unchecked, 4.18ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2091.98ms Time] [2021-11-12 23:47:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22918 states. [2021-11-12 23:47:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22918 to 22918. [2021-11-12 23:47:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22918 states, 17117 states have (on average 1.3310743705088508) internal successors, (22784), 17233 states have internal predecessors, (22784), 4134 states have call successors, (4134), 1637 states have call predecessors, (4134), 1666 states have return successors, (4263), 4101 states have call predecessors, (4263), 4133 states have call successors, (4263) [2021-11-12 23:47:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22918 states to 22918 states and 31181 transitions. [2021-11-12 23:47:25,024 INFO L78 Accepts]: Start accepts. Automaton has 22918 states and 31181 transitions. Word has length 781 [2021-11-12 23:47:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:25,025 INFO L470 AbstractCegarLoop]: Abstraction has 22918 states and 31181 transitions. [2021-11-12 23:47:25,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 2 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-12 23:47:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 22918 states and 31181 transitions. [2021-11-12 23:47:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2021-11-12 23:47:25,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:25,074 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:25,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:25,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:25,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:25,491 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:25,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2079540317, now seen corresponding path program 1 times [2021-11-12 23:47:25,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:25,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997735577] [2021-11-12 23:47:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:25,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:25,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:25,507 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:25,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:47:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:36,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 6571 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:36,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2661 backedges. 791 proven. 1 refuted. 0 times theorem prover too weak. 1869 trivial. 0 not checked. [2021-11-12 23:47:45,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2661 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 2578 trivial. 0 not checked. [2021-11-12 23:47:51,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:51,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997735577] [2021-11-12 23:47:51,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997735577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:51,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1684352396] [2021-11-12 23:47:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:51,332 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:51,358 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:51,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 23:47:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:57,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 6571 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:47:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2661 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 2533 trivial. 0 not checked. [2021-11-12 23:48:03,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2661 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2021-11-12 23:48:06,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1684352396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:06,916 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:48:06,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-12 23:48:06,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470709685] [2021-11-12 23:48:06,917 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:06,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:48:06,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:06,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:48:06,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:48:06,919 INFO L87 Difference]: Start difference. First operand 22918 states and 31181 transitions. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 4 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2021-11-12 23:48:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:08,099 INFO L93 Difference]: Finished difference Result 47575 states and 65053 transitions. [2021-11-12 23:48:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:48:08,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 4 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 790 [2021-11-12 23:48:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:08,168 INFO L225 Difference]: With dead ends: 47575 [2021-11-12 23:48:08,168 INFO L226 Difference]: Without dead ends: 24825 [2021-11-12 23:48:08,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3156 GetRequests, 3145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:48:08,202 INFO L933 BasicCegarLoop]: 2590 mSDtfsCounter, 534 mSDsluCounter, 4018 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 281.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 6608 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.60ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 294.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:08,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 6608 Invalid, 19 Unknown, 0 Unchecked, 8.60ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 294.96ms Time] [2021-11-12 23:48:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24825 states. [2021-11-12 23:48:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24825 to 23158. [2021-11-12 23:48:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23158 states, 17317 states have (on average 1.331870416353872) internal successors, (23064), 17433 states have internal predecessors, (23064), 4174 states have call successors, (4174), 1637 states have call predecessors, (4174), 1666 states have return successors, (4303), 4141 states have call predecessors, (4303), 4173 states have call successors, (4303) [2021-11-12 23:48:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23158 states to 23158 states and 31541 transitions. [2021-11-12 23:48:09,155 INFO L78 Accepts]: Start accepts. Automaton has 23158 states and 31541 transitions. Word has length 790 [2021-11-12 23:48:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:09,155 INFO L470 AbstractCegarLoop]: Abstraction has 23158 states and 31541 transitions. [2021-11-12 23:48:09,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 4 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2021-11-12 23:48:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 23158 states and 31541 transitions. [2021-11-12 23:48:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2021-11-12 23:48:09,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:09,192 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:48:09,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:09,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-12 23:48:09,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:09,605 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:48:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1135035757, now seen corresponding path program 1 times [2021-11-12 23:48:09,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:09,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091239114] [2021-11-12 23:48:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:09,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:09,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:09,614 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:09,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 23:48:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:21,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 6641 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:48:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 791 proven. 1 refuted. 0 times theorem prover too weak. 1934 trivial. 0 not checked. [2021-11-12 23:48:29,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 2643 trivial. 0 not checked. [2021-11-12 23:48:36,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:36,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091239114] [2021-11-12 23:48:36,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091239114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:48:36,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [449417425] [2021-11-12 23:48:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:36,540 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:48:36,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:48:36,540 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:48:36,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bef8483-a6eb-4d93-a49e-9cb3fe97bb35/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-12 23:48:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:42,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 6641 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:48:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-12 23:48:48,353 INFO L328 TraceCheckSpWp]: Computing backward predicates...