./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-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d256a8b259faad28b260c065eb5db63197c2a9358a88ea40fe4f65cbd4165ef2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:03:17,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:03:17,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:03:17,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:03:17,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:03:17,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:03:17,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:03:17,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:03:17,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:03:17,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:03:17,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:03:17,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:03:17,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:03:17,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:03:17,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:03:17,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:03:17,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:03:17,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:03:17,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:03:17,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:03:17,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:03:17,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:03:17,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:03:17,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:03:17,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:03:17,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:03:17,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:03:17,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:03:17,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:03:17,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:03:17,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:03:17,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:03:17,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:03:17,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:03:17,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:03:17,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:03:17,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:03:17,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:03:17,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:03:17,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:03:17,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:03:17,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:03:17,889 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:03:17,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:03:17,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:03:17,891 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:03:17,891 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:03:17,891 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:03:17,892 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:03:17,892 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:03:17,892 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:03:17,892 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:03:17,893 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:03:17,893 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:03:17,894 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:03:17,894 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:03:17,894 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:03:17,894 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:03:17,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:03:17,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:03:17,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:03:17,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:03:17,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:03:17,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:03:17,896 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:03:17,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:03:17,897 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:03:17,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:03:17,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:03:17,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:03:17,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:17,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:03:17,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:03:17,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:03:17,899 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:03:17,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:03:17,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:03:17,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:03:17,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:03:17,900 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_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d256a8b259faad28b260c065eb5db63197c2a9358a88ea40fe4f65cbd4165ef2 [2021-11-19 14:03:18,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:03:18,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:03:18,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:03:18,207 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:03:18,208 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:03:18,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i [2021-11-19 14:03:18,298 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data/1b430aabc/627332c768714caabb431972e80bbbea/FLAG6d8f4704e [2021-11-19 14:03:19,084 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:03:19,085 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i [2021-11-19 14:03:19,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data/1b430aabc/627332c768714caabb431972e80bbbea/FLAG6d8f4704e [2021-11-19 14:03:19,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data/1b430aabc/627332c768714caabb431972e80bbbea [2021-11-19 14:03:19,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:03:19,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:03:19,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:19,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:03:19,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:03:19,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:19" (1/1) ... [2021-11-19 14:03:19,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef91a17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:19, skipping insertion in model container [2021-11-19 14:03:19,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:19" (1/1) ... [2021-11-19 14:03:19,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:03:19,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:03:20,869 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:20,986 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,015 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,041 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,058 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,059 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,065 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,066 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,093 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,180 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,181 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:03:21,295 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i[159905,159918] [2021-11-19 14:03:21,431 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:21,461 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:03:21,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@65954bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:21, skipping insertion in model container [2021-11-19 14:03:21,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:21,462 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:03:21,465 INFO L158 Benchmark]: Toolchain (without parser) took 1805.26ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 67.7MB in the beginning and 45.6MB in the end (delta: 22.2MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. [2021-11-19 14:03:21,465 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:03:21,466 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1802.93ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 67.7MB in the beginning and 45.6MB in the end (delta: 22.2MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. [2021-11-19 14:03:21,468 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1802.93ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 67.7MB in the beginning and 45.6MB in the end (delta: 22.2MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3385]: 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_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d256a8b259faad28b260c065eb5db63197c2a9358a88ea40fe4f65cbd4165ef2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:03:23,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:03:23,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:03:23,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:03:23,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:03:23,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:03:23,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:03:23,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:03:23,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:03:23,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:03:23,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:03:23,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:03:23,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:03:23,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:03:23,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:03:23,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:03:23,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:03:23,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:03:23,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:03:23,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:03:23,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:03:23,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:03:23,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:03:23,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:03:23,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:03:23,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:03:23,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:03:23,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:03:23,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:03:23,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:03:23,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:03:23,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:03:23,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:03:23,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:03:23,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:03:23,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:03:23,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:03:23,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:03:23,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:03:23,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:03:23,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:03:23,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:03:23,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:03:23,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:03:23,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:03:23,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:03:23,954 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:03:23,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:03:23,954 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:03:23,954 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:03:23,955 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:03:23,955 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:03:23,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:03:23,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:03:23,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:03:23,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:03:23,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:03:23,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:03:23,959 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:03:23,959 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:03:23,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:03:23,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:03:23,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:03:23,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:03:23,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:03:23,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:03:23,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:23,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:03:23,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:03:23,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:03:23,961 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:03:23,962 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:23,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:03:23,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:03:23,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:03:23,962 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_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d256a8b259faad28b260c065eb5db63197c2a9358a88ea40fe4f65cbd4165ef2 [2021-11-19 14:03:24,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:03:24,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:03:24,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:03:24,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:03:24,366 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:03:24,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i [2021-11-19 14:03:24,454 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data/4e20ead48/e16bc09488fb4511be4da0784901f2c3/FLAGcb41a694f [2021-11-19 14:03:25,302 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:03:25,303 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i [2021-11-19 14:03:25,354 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data/4e20ead48/e16bc09488fb4511be4da0784901f2c3/FLAGcb41a694f [2021-11-19 14:03:25,814 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/data/4e20ead48/e16bc09488fb4511be4da0784901f2c3 [2021-11-19 14:03:25,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:03:25,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:03:25,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:25,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:03:25,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:03:25,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:25" (1/1) ... [2021-11-19 14:03:25,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25122c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:25, skipping insertion in model container [2021-11-19 14:03:25,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:25" (1/1) ... [2021-11-19 14:03:25,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:03:25,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:03:27,314 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i[159905,159918] [2021-11-19 14:03:27,481 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:27,544 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:03:27,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:03:27,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i[159905,159918] [2021-11-19 14:03:27,805 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:27,827 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:03:28,058 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i[159905,159918] [2021-11-19 14:03:28,072 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:28,206 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:03:28,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28 WrapperNode [2021-11-19 14:03:28,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:28,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:03:28,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:03:28,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:03:28,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,380 INFO L137 Inliner]: procedures = 274, calls = 1102, calls flagged for inlining = 115, calls inlined = 111, statements flattened = 2717 [2021-11-19 14:03:28,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:03:28,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:03:28,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:03:28,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:03:28,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:03:28,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:03:28,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:03:28,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:03:28,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (1/1) ... [2021-11-19 14:03:28,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:03:28,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:03:28,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:03:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:03:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:03:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:03:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:03:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:03:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:03:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:03:28,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:03:28,769 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_create [2021-11-19 14:03:28,769 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_create [2021-11-19 14:03:28,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:03:28,769 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:03:28,769 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-19 14:03:28,769 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-19 14:03:28,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:03:28,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:03:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-19 14:03:28,770 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-19 14:03:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_event [2021-11-19 14:03:28,770 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_event [2021-11-19 14:03:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 14:03:28,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 14:03:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_packet [2021-11-19 14:03:28,771 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_packet [2021-11-19 14:03:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-19 14:03:28,771 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-19 14:03:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:03:28,771 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:03:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:03:28,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:03:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-19 14:03:28,772 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-19 14:03:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_notify_readers [2021-11-19 14:03:28,772 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_notify_readers [2021-11-19 14:03:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-19 14:03:28,772 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-19 14:03:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:03:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-19 14:03:28,772 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-19 14:03:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_close_device [2021-11-19 14:03:28,773 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_close_device [2021-11-19 14:03:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:03:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_fasync [2021-11-19 14:03:28,773 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_fasync [2021-11-19 14:03:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure __list_del_entry [2021-11-19 14:03:28,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_del_entry [2021-11-19 14:03:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_mousedev [2021-11-19 14:03:28,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_mousedev [2021-11-19 14:03:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_poll [2021-11-19 14:03:28,774 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_poll [2021-11-19 14:03:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 14:03:28,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 14:03:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-11-19 14:03:28,774 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-11-19 14:03:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure input_abs_get_min [2021-11-19 14:03:28,774 INFO L138 BoogieDeclarations]: Found implementation of procedure input_abs_get_min [2021-11-19 14:03:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:03:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:03:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:03:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:03:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:03:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_destroy [2021-11-19 14:03:28,775 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_destroy [2021-11-19 14:03:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:03:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 14:03:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2021-11-19 14:03:28,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2021-11-19 14:03:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:03:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:03:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure put_device [2021-11-19 14:03:28,776 INFO L138 BoogieDeclarations]: Found implementation of procedure put_device [2021-11-19 14:03:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:03:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-19 14:03:28,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-19 14:03:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_limit_delta [2021-11-19 14:03:28,777 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_limit_delta [2021-11-19 14:03:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-19 14:03:28,777 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-19 14:03:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-19 14:03:28,777 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-19 14:03:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-19 14:03:28,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-19 14:03:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_key_event [2021-11-19 14:03:28,778 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_key_event [2021-11-19 14:03:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:03:28,778 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:03:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure get_device [2021-11-19 14:03:28,778 INFO L138 BoogieDeclarations]: Found implementation of procedure get_device [2021-11-19 14:03:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 14:03:28,778 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 14:03:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2021-11-19 14:03:28,779 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2021-11-19 14:03:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:03:28,779 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:03:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure kill_fasync [2021-11-19 14:03:28,779 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_fasync [2021-11-19 14:03:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure input_close_device [2021-11-19 14:03:28,779 INFO L138 BoogieDeclarations]: Found implementation of procedure input_close_device [2021-11-19 14:03:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:03:28,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:03:28,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:03:28,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:03:28,780 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-19 14:03:28,780 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-19 14:03:28,780 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-19 14:03:28,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-19 14:03:28,780 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-19 14:03:28,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-19 14:03:28,781 INFO L130 BoogieDeclarations]: Found specification of procedure input_get_new_minor [2021-11-19 14:03:28,781 INFO L138 BoogieDeclarations]: Found implementation of procedure input_get_new_minor [2021-11-19 14:03:28,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:03:28,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-19 14:03:28,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-19 14:03:28,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:03:28,781 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_write [2021-11-19 14:03:28,781 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_write [2021-11-19 14:03:28,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 14:03:28,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 14:03:28,782 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_handle [2021-11-19 14:03:28,782 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_handle [2021-11-19 14:03:28,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:03:28,782 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-11-19 14:03:28,782 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-11-19 14:03:28,782 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 14:03:28,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:03:28,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:03:28,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:03:28,783 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex_of_mousedev [2021-11-19 14:03:28,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex_of_mousedev [2021-11-19 14:03:28,783 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-19 14:03:28,783 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-19 14:03:28,783 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_detach_client [2021-11-19 14:03:28,783 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_detach_client [2021-11-19 14:03:28,783 INFO L130 BoogieDeclarations]: Found specification of procedure input_abs_get_max [2021-11-19 14:03:28,783 INFO L138 BoogieDeclarations]: Found implementation of procedure input_abs_get_max [2021-11-19 14:03:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-19 14:03:28,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-19 14:03:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-19 14:03:28,784 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-19 14:03:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure input_free_minor [2021-11-19 14:03:28,784 INFO L138 BoogieDeclarations]: Found implementation of procedure input_free_minor [2021-11-19 14:03:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_cleanup [2021-11-19 14:03:28,784 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_cleanup [2021-11-19 14:03:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_open_device [2021-11-19 14:03:28,785 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_open_device [2021-11-19 14:03:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure mousedev_disconnect [2021-11-19 14:03:28,785 INFO L138 BoogieDeclarations]: Found implementation of procedure mousedev_disconnect [2021-11-19 14:03:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_mutex_of_mousedev [2021-11-19 14:03:28,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_mutex_of_mousedev [2021-11-19 14:03:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-19 14:03:28,785 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-19 14:03:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-19 14:03:28,785 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-19 14:03:28,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:03:28,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:03:28,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:03:28,786 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-19 14:03:28,786 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-19 14:03:29,433 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:03:29,436 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:03:32,103 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:03:58,507 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:03:58,526 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:03:58,527 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:03:58,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:03:58 BoogieIcfgContainer [2021-11-19 14:03:58,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:03:58,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:03:58,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:03:58,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:03:58,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:03:25" (1/3) ... [2021-11-19 14:03:58,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341bc776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:03:58, skipping insertion in model container [2021-11-19 14:03:58,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:28" (2/3) ... [2021-11-19 14:03:58,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341bc776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:03:58, skipping insertion in model container [2021-11-19 14:03:58,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:03:58" (3/3) ... [2021-11-19 14:03:58,539 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--input--mousedev.ko-entry_point.cil.out.i [2021-11-19 14:03:58,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:03:58,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:03:58,601 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:03:58,608 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:03:58,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:03:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 974 states, 715 states have (on average 1.3734265734265734) internal successors, (982), 747 states have internal predecessors, (982), 195 states have call successors, (195), 63 states have call predecessors, (195), 62 states have return successors, (191), 188 states have call predecessors, (191), 191 states have call successors, (191) [2021-11-19 14:03:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-19 14:03:58,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:58,668 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-11-19 14:03:58,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash -198581603, now seen corresponding path program 1 times [2021-11-19 14:03:58,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:58,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591749140] [2021-11-19 14:03:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:58,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:58,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:58,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:04:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:00,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:04:00,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-11-19 14:04:01,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-11-19 14:04:02,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:02,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591749140] [2021-11-19 14:04:02,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591749140] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:04:02,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:04:02,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 14:04:02,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55967648] [2021-11-19 14:04:02,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:02,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:04:02,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:04:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:04:02,785 INFO L87 Difference]: Start difference. First operand has 974 states, 715 states have (on average 1.3734265734265734) internal successors, (982), 747 states have internal predecessors, (982), 195 states have call successors, (195), 63 states have call predecessors, (195), 62 states have return successors, (191), 188 states have call predecessors, (191), 191 states have call successors, (191) Second operand has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 14:04:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:02,956 INFO L93 Difference]: Finished difference Result 1943 states and 2783 transitions. [2021-11-19 14:04:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:04:02,960 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 244 [2021-11-19 14:04:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:02,994 INFO L225 Difference]: With dead ends: 1943 [2021-11-19 14:04:02,994 INFO L226 Difference]: Without dead ends: 963 [2021-11-19 14:04:03,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:04:03,018 INFO L933 BasicCegarLoop]: 1358 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:03,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:04:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-19 14:04:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-11-19 14:04:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 710 states have (on average 1.3661971830985915) internal successors, (970), 736 states have internal predecessors, (970), 191 states have call successors, (191), 62 states have call predecessors, (191), 61 states have return successors, (184), 181 states have call predecessors, (184), 184 states have call successors, (184) [2021-11-19 14:04:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1345 transitions. [2021-11-19 14:04:03,147 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1345 transitions. Word has length 244 [2021-11-19 14:04:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:03,148 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1345 transitions. [2021-11-19 14:04:03,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 14:04:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1345 transitions. [2021-11-19 14:04:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-19 14:04:03,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:03,154 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-11-19 14:04:03,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:04:03,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:03,376 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:03,376 INFO L85 PathProgramCache]: Analyzing trace with hash -61177171, now seen corresponding path program 1 times [2021-11-19 14:04:03,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:03,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431769570] [2021-11-19 14:04:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:03,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:03,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:03,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:03,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:04:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:04:04,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-19 14:04:06,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-11-19 14:04:08,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:08,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431769570] [2021-11-19 14:04:08,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431769570] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:04:08,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:04:08,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-19 14:04:08,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093617396] [2021-11-19 14:04:08,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:08,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:04:08,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:08,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:04:08,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:04:08,090 INFO L87 Difference]: Start difference. First operand 963 states and 1345 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:04:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:09,073 INFO L93 Difference]: Finished difference Result 1912 states and 2684 transitions. [2021-11-19 14:04:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:04:09,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 244 [2021-11-19 14:04:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:09,087 INFO L225 Difference]: With dead ends: 1912 [2021-11-19 14:04:09,088 INFO L226 Difference]: Without dead ends: 964 [2021-11-19 14:04:09,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:04:09,099 INFO L933 BasicCegarLoop]: 1333 mSDtfsCounter, 6 mSDsluCounter, 5307 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6640 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:09,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 6640 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:04:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-11-19 14:04:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 964. [2021-11-19 14:04:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 711 states have (on average 1.3656821378340365) internal successors, (971), 737 states have internal predecessors, (971), 191 states have call successors, (191), 62 states have call predecessors, (191), 61 states have return successors, (184), 181 states have call predecessors, (184), 184 states have call successors, (184) [2021-11-19 14:04:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1346 transitions. [2021-11-19 14:04:09,181 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1346 transitions. Word has length 244 [2021-11-19 14:04:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:09,184 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1346 transitions. [2021-11-19 14:04:09,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:04:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1346 transitions. [2021-11-19 14:04:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-19 14:04:09,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:09,193 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-11-19 14:04:09,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 14:04:09,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:09,408 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:09,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1025234144, now seen corresponding path program 1 times [2021-11-19 14:04:09,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:09,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124099321] [2021-11-19 14:04:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:09,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:09,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:09,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:09,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:04:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:10,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2239 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:04:10,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-19 14:04:12,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-19 14:04:14,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:14,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124099321] [2021-11-19 14:04:14,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124099321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:14,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [690093865] [2021-11-19 14:04:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:14,507 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:14,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:04:14,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:04:14,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 14:04:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 2239 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:04:15,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:04:16,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:04:17,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [690093865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:17,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:04:17,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:04:17,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043434684] [2021-11-19 14:04:17,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:17,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:04:17,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:04:17,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:17,101 INFO L87 Difference]: Start difference. First operand 964 states and 1346 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-19 14:04:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:17,596 INFO L93 Difference]: Finished difference Result 2483 states and 3426 transitions. [2021-11-19 14:04:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:04:17,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 253 [2021-11-19 14:04:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:17,610 INFO L225 Difference]: With dead ends: 2483 [2021-11-19 14:04:17,611 INFO L226 Difference]: Without dead ends: 1561 [2021-11-19 14:04:17,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:17,616 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 845 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 2776 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:17,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 2776 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:04:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2021-11-19 14:04:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1546. [2021-11-19 14:04:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1135 states have (on average 1.3444933920704847) internal successors, (1526), 1174 states have internal predecessors, (1526), 301 states have call successors, (301), 110 states have call predecessors, (301), 109 states have return successors, (294), 289 states have call predecessors, (294), 294 states have call successors, (294) [2021-11-19 14:04:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2121 transitions. [2021-11-19 14:04:17,721 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2121 transitions. Word has length 253 [2021-11-19 14:04:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:17,726 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 2121 transitions. [2021-11-19 14:04:17,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-19 14:04:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2121 transitions. [2021-11-19 14:04:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-19 14:04:17,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:17,736 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-11-19 14:04:17,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:17,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-19 14:04:18,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:18,160 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash -176116855, now seen corresponding path program 1 times [2021-11-19 14:04:18,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:18,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877948104] [2021-11-19 14:04:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:18,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:18,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:18,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:18,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:04:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:19,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 2263 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:04:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-19 14:04:20,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-19 14:04:22,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:22,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877948104] [2021-11-19 14:04:22,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877948104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:22,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [226676408] [2021-11-19 14:04:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:22,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:04:22,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:04:22,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 14:04:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2263 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:04:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:04:24,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:04:25,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [226676408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:25,408 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:04:25,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-19 14:04:25,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555742474] [2021-11-19 14:04:25,409 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:25,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:04:25,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:04:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:04:25,410 INFO L87 Difference]: Start difference. First operand 1546 states and 2121 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-19 14:04:27,543 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:32,219 INFO L93 Difference]: Finished difference Result 5748 states and 7890 transitions. [2021-11-19 14:04:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:04:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 258 [2021-11-19 14:04:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:32,260 INFO L225 Difference]: With dead ends: 5748 [2021-11-19 14:04:32,260 INFO L226 Difference]: Without dead ends: 4249 [2021-11-19 14:04:32,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1017 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:04:32,271 INFO L933 BasicCegarLoop]: 2664 mSDtfsCounter, 2543 mSDsluCounter, 3360 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2543 SdHoareTripleChecker+Valid, 6024 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:32,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2543 Valid, 6024 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 383 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2021-11-19 14:04:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-11-19 14:04:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 4239. [2021-11-19 14:04:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 3134 states have (on average 1.3522654754307595) internal successors, (4238), 3229 states have internal predecessors, (4238), 793 states have call successors, (793), 312 states have call predecessors, (793), 311 states have return successors, (786), 773 states have call predecessors, (786), 786 states have call successors, (786) [2021-11-19 14:04:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 5817 transitions. [2021-11-19 14:04:32,533 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 5817 transitions. Word has length 258 [2021-11-19 14:04:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:32,535 INFO L470 AbstractCegarLoop]: Abstraction has 4239 states and 5817 transitions. [2021-11-19 14:04:32,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-19 14:04:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 5817 transitions. [2021-11-19 14:04:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-19 14:04:32,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:32,542 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-11-19 14:04:32,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:32,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 14:04:32,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:32,951 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:32,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2005654604, now seen corresponding path program 1 times [2021-11-19 14:04:32,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:32,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769148636] [2021-11-19 14:04:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:32,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:32,954 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:32,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:04:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:04:34,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-19 14:04:36,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-19 14:04:38,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:38,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769148636] [2021-11-19 14:04:38,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769148636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:38,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332962565] [2021-11-19 14:04:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:38,760 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:38,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:04:38,761 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:04:38,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 14:04:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:39,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:04:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:04:40,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:04:41,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1332962565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:41,509 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:04:41,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:04:41,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446416442] [2021-11-19 14:04:41,510 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:41,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:04:41,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:41,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:04:41,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:41,514 INFO L87 Difference]: Start difference. First operand 4239 states and 5817 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 14:04:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:42,375 INFO L93 Difference]: Finished difference Result 10479 states and 14349 transitions. [2021-11-19 14:04:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:04:42,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 284 [2021-11-19 14:04:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:42,434 INFO L225 Difference]: With dead ends: 10479 [2021-11-19 14:04:42,434 INFO L226 Difference]: Without dead ends: 6297 [2021-11-19 14:04:42,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1132 GetRequests, 1122 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:42,456 INFO L933 BasicCegarLoop]: 1459 mSDtfsCounter, 929 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:42,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 2680 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:04:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6297 states. [2021-11-19 14:04:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6297 to 6249. [2021-11-19 14:04:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6249 states, 4625 states have (on average 1.3545945945945945) internal successors, (6265), 4768 states have internal predecessors, (6265), 1141 states have call successors, (1141), 496 states have call predecessors, (1141), 482 states have return successors, (1144), 1092 states have call predecessors, (1144), 1134 states have call successors, (1144) [2021-11-19 14:04:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6249 states to 6249 states and 8550 transitions. [2021-11-19 14:04:42,904 INFO L78 Accepts]: Start accepts. Automaton has 6249 states and 8550 transitions. Word has length 284 [2021-11-19 14:04:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:42,906 INFO L470 AbstractCegarLoop]: Abstraction has 6249 states and 8550 transitions. [2021-11-19 14:04:42,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 14:04:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6249 states and 8550 transitions. [2021-11-19 14:04:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-19 14:04:42,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:42,912 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-11-19 14:04:42,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:43,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:43,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:43,352 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1866474114, now seen corresponding path program 1 times [2021-11-19 14:04:43,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:43,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730659654] [2021-11-19 14:04:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:43,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:43,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:43,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:43,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:04:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:44,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 2371 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:04:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-19 14:04:46,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-19 14:04:49,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:49,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730659654] [2021-11-19 14:04:49,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730659654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:49,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [138450839] [2021-11-19 14:04:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:49,220 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:49,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:04:49,224 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:04:49,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:04:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:50,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 2371 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:04:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:04:55,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:04:58,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [138450839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:58,230 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:04:58,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 14 [2021-11-19 14:04:58,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89747810] [2021-11-19 14:04:58,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:58,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:04:58,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:58,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:04:58,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:04:58,233 INFO L87 Difference]: Start difference. First operand 6249 states and 8550 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 5 states have call successors, (52), 5 states have call predecessors, (52), 4 states have return successors, (48), 4 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-19 14:05:00,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:05,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:09,271 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:12,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:15,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:17,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:23,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:26,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:29,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:34,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:34,917 INFO L93 Difference]: Finished difference Result 17910 states and 24781 transitions. [2021-11-19 14:05:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:05:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 5 states have call successors, (52), 5 states have call predecessors, (52), 4 states have return successors, (48), 4 states have call predecessors, (48), 4 states have call successors, (48) Word has length 287 [2021-11-19 14:05:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:35,016 INFO L225 Difference]: With dead ends: 17910 [2021-11-19 14:05:35,016 INFO L226 Difference]: Without dead ends: 11721 [2021-11-19 14:05:35,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:05:35,052 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 2825 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 870 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2956 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:35,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2956 Valid, 2476 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 1145 Invalid, 8 Unknown, 0 Unchecked, 36.0s Time] [2021-11-19 14:05:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11721 states. [2021-11-19 14:05:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11721 to 11572. [2021-11-19 14:05:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11572 states, 8692 states have (on average 1.3638978370915784) internal successors, (11855), 8963 states have internal predecessors, (11855), 2018 states have call successors, (2018), 913 states have call predecessors, (2018), 861 states have return successors, (2109), 1865 states have call predecessors, (2109), 2006 states have call successors, (2109) [2021-11-19 14:05:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11572 states to 11572 states and 15982 transitions. [2021-11-19 14:05:35,729 INFO L78 Accepts]: Start accepts. Automaton has 11572 states and 15982 transitions. Word has length 287 [2021-11-19 14:05:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:35,730 INFO L470 AbstractCegarLoop]: Abstraction has 11572 states and 15982 transitions. [2021-11-19 14:05:35,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 5 states have call successors, (52), 5 states have call predecessors, (52), 4 states have return successors, (48), 4 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-19 14:05:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 11572 states and 15982 transitions. [2021-11-19 14:05:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-19 14:05:35,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:35,735 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-11-19 14:05:35,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:35,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:36,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:05:36,156 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:05:36,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:36,156 INFO L85 PathProgramCache]: Analyzing trace with hash 183785803, now seen corresponding path program 1 times [2021-11-19 14:05:36,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:36,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187702531] [2021-11-19 14:05:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:36,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:36,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:36,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:36,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:05:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:37,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 2338 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:05:37,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-19 14:05:39,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-19 14:05:42,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:42,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187702531] [2021-11-19 14:05:42,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187702531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:05:42,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [285017207] [2021-11-19 14:05:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:42,277 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:05:42,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:05:42,299 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:05:42,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:05:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:43,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 2338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:05:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:05:48,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:05:50,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [285017207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:50,524 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:05:50,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:05:50,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554363614] [2021-11-19 14:05:50,525 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:50,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:05:50,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:50,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:05:50,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:50,528 INFO L87 Difference]: Start difference. First operand 11572 states and 15982 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-19 14:05:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:50,999 INFO L93 Difference]: Finished difference Result 11574 states and 15983 transitions. [2021-11-19 14:05:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:05:51,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 288 [2021-11-19 14:05:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:51,144 INFO L225 Difference]: With dead ends: 11574 [2021-11-19 14:05:51,159 INFO L226 Difference]: Without dead ends: 11571 [2021-11-19 14:05:51,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1138 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:51,165 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1221 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:51,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 1342 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:05:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2021-11-19 14:05:51,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11571. [2021-11-19 14:05:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11571 states, 8692 states have (on average 1.3636677404509894) internal successors, (11853), 8962 states have internal predecessors, (11853), 2017 states have call successors, (2017), 913 states have call predecessors, (2017), 861 states have return successors, (2109), 1865 states have call predecessors, (2109), 2006 states have call successors, (2109) [2021-11-19 14:05:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11571 states to 11571 states and 15979 transitions. [2021-11-19 14:05:51,832 INFO L78 Accepts]: Start accepts. Automaton has 11571 states and 15979 transitions. Word has length 288 [2021-11-19 14:05:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:51,833 INFO L470 AbstractCegarLoop]: Abstraction has 11571 states and 15979 transitions. [2021-11-19 14:05:51,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-19 14:05:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 11571 states and 15979 transitions. [2021-11-19 14:05:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-19 14:05:51,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:51,839 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-11-19 14:05:51,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:52,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:52,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:05:52,258 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:05:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1402140964, now seen corresponding path program 1 times [2021-11-19 14:05:52,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:52,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692167168] [2021-11-19 14:05:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:52,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:52,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:52,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:52,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:05:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:53,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 2339 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:05:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-19 14:05:55,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-19 14:05:58,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:58,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692167168] [2021-11-19 14:05:58,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692167168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:05:58,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1955969470] [2021-11-19 14:05:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:58,387 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:05:58,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:05:58,395 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:05:58,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:05:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 2339 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:05:59,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:06:05,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:06:06,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1955969470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:06,865 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:06:06,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:06:06,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106625255] [2021-11-19 14:06:06,866 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:06,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:06:06,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:06,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:06:06,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:06,868 INFO L87 Difference]: Start difference. First operand 11571 states and 15979 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-19 14:06:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:07,181 INFO L93 Difference]: Finished difference Result 11573 states and 15980 transitions. [2021-11-19 14:06:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:06:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 289 [2021-11-19 14:06:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:07,229 INFO L225 Difference]: With dead ends: 11573 [2021-11-19 14:06:07,229 INFO L226 Difference]: Without dead ends: 11570 [2021-11-19 14:06:07,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1142 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:07,235 INFO L933 BasicCegarLoop]: 1340 mSDtfsCounter, 1218 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:07,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 1340 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:06:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11570 states. [2021-11-19 14:06:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11570 to 11570. [2021-11-19 14:06:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11570 states, 8692 states have (on average 1.3634376438104003) internal successors, (11851), 8961 states have internal predecessors, (11851), 2016 states have call successors, (2016), 913 states have call predecessors, (2016), 861 states have return successors, (2109), 1865 states have call predecessors, (2109), 2006 states have call successors, (2109) [2021-11-19 14:06:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11570 states to 11570 states and 15976 transitions. [2021-11-19 14:06:08,114 INFO L78 Accepts]: Start accepts. Automaton has 11570 states and 15976 transitions. Word has length 289 [2021-11-19 14:06:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:08,116 INFO L470 AbstractCegarLoop]: Abstraction has 11570 states and 15976 transitions. [2021-11-19 14:06:08,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-19 14:06:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 11570 states and 15976 transitions. [2021-11-19 14:06:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-19 14:06:08,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:08,121 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-11-19 14:06:08,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 14:06:08,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:08,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:06:08,539 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:08,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash 516450158, now seen corresponding path program 1 times [2021-11-19 14:06:08,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:08,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65378020] [2021-11-19 14:06:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:08,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:08,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:08,546 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:08,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:06:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2340 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:06:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-19 14:06:12,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-19 14:06:15,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:15,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65378020] [2021-11-19 14:06:15,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65378020] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:06:15,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1153307369] [2021-11-19 14:06:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:15,011 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:06:15,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:06:15,011 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:06:15,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:06:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2340 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:06:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:06:21,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:06:23,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1153307369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:23,254 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:06:23,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:06:23,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635997557] [2021-11-19 14:06:23,254 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:23,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:06:23,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:06:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:23,256 INFO L87 Difference]: Start difference. First operand 11570 states and 15976 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-19 14:06:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:23,536 INFO L93 Difference]: Finished difference Result 11572 states and 15977 transitions. [2021-11-19 14:06:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:06:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 290 [2021-11-19 14:06:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:23,589 INFO L225 Difference]: With dead ends: 11572 [2021-11-19 14:06:23,590 INFO L226 Difference]: Without dead ends: 11526 [2021-11-19 14:06:23,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1156 GetRequests, 1146 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:23,601 INFO L933 BasicCegarLoop]: 1338 mSDtfsCounter, 1215 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:23,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 1338 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:06:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11526 states. [2021-11-19 14:06:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11526 to 11524. [2021-11-19 14:06:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11524 states, 8662 states have (on average 1.3635419071807897) internal successors, (11811), 8930 states have internal predecessors, (11811), 2007 states have call successors, (2007), 907 states have call predecessors, (2007), 854 states have return successors, (2089), 1855 states have call predecessors, (2089), 1986 states have call successors, (2089) [2021-11-19 14:06:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11524 states to 11524 states and 15907 transitions. [2021-11-19 14:06:24,759 INFO L78 Accepts]: Start accepts. Automaton has 11524 states and 15907 transitions. Word has length 290 [2021-11-19 14:06:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:24,760 INFO L470 AbstractCegarLoop]: Abstraction has 11524 states and 15907 transitions. [2021-11-19 14:06:24,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-19 14:06:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 11524 states and 15907 transitions. [2021-11-19 14:06:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-19 14:06:24,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:24,763 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1] [2021-11-19 14:06:24,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-19 14:06:25,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 14:06:25,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:25,172 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:25,173 INFO L85 PathProgramCache]: Analyzing trace with hash -127217004, now seen corresponding path program 1 times [2021-11-19 14:06:25,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:25,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569425402] [2021-11-19 14:06:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:25,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:25,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:25,176 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:25,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:06:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2396 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:06:26,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-19 14:06:28,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-19 14:06:31,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:31,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569425402] [2021-11-19 14:06:31,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569425402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:06:31,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [141872011] [2021-11-19 14:06:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:31,368 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:06:31,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:06:31,369 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:06:31,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:06:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:32,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 2396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:06:32,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:06:33,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-19 14:06:33,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [141872011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:33,911 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:06:33,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:06:33,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6511643] [2021-11-19 14:06:33,911 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:33,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:06:33,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:06:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:33,913 INFO L87 Difference]: Start difference. First operand 11524 states and 15907 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-19 14:06:36,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:36,754 INFO L93 Difference]: Finished difference Result 22811 states and 31491 transitions. [2021-11-19 14:06:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:06:36,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 298 [2021-11-19 14:06:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:36,811 INFO L225 Difference]: With dead ends: 22811 [2021-11-19 14:06:36,811 INFO L226 Difference]: Without dead ends: 11310 [2021-11-19 14:06:36,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1178 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:36,872 INFO L933 BasicCegarLoop]: 2367 mSDtfsCounter, 1173 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 3634 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:36,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 3634 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:06:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11310 states. [2021-11-19 14:06:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11310 to 11019. [2021-11-19 14:06:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11019 states, 8377 states have (on average 1.365763399785126) internal successors, (11441), 8578 states have internal predecessors, (11441), 1812 states have call successors, (1812), 833 states have call predecessors, (1812), 829 states have return successors, (1836), 1759 states have call predecessors, (1836), 1782 states have call successors, (1836) [2021-11-19 14:06:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11019 states to 11019 states and 15089 transitions. [2021-11-19 14:06:37,563 INFO L78 Accepts]: Start accepts. Automaton has 11019 states and 15089 transitions. Word has length 298 [2021-11-19 14:06:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:37,564 INFO L470 AbstractCegarLoop]: Abstraction has 11019 states and 15089 transitions. [2021-11-19 14:06:37,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-19 14:06:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 11019 states and 15089 transitions. [2021-11-19 14:06:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-19 14:06:37,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:37,569 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-11-19 14:06:37,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:37,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-19 14:06:37,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:06:37,992 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:37,992 INFO L85 PathProgramCache]: Analyzing trace with hash 919224673, now seen corresponding path program 1 times [2021-11-19 14:06:37,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:37,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500520578] [2021-11-19 14:06:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:37,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:37,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:37,995 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:37,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:06:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 2464 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:06:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2021-11-19 14:06:42,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2021-11-19 14:06:44,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:44,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500520578] [2021-11-19 14:06:44,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500520578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:06:44,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [698728675] [2021-11-19 14:06:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:44,988 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:06:44,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:06:44,989 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:06:44,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:06:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:06:46,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2021-11-19 14:06:47,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2021-11-19 14:06:48,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [698728675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:48,627 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:06:48,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-19 14:06:48,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526084183] [2021-11-19 14:06:48,628 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:48,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:06:48,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:48,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:06:48,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:06:48,630 INFO L87 Difference]: Start difference. First operand 11019 states and 15089 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 4 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-19 14:06:50,774 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 [] [2021-11-19 14:06:56,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:56,628 INFO L93 Difference]: Finished difference Result 35179 states and 48707 transitions. [2021-11-19 14:06:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:06:56,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 4 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) Word has length 329 [2021-11-19 14:06:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:56,842 INFO L225 Difference]: With dead ends: 35179 [2021-11-19 14:06:56,842 INFO L226 Difference]: Without dead ends: 24221 [2021-11-19 14:06:56,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1312 GetRequests, 1301 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:06:56,882 INFO L933 BasicCegarLoop]: 2288 mSDtfsCounter, 2488 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 4615 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:56,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2488 Valid, 4615 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2021-11-19 14:06:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24221 states. [2021-11-19 14:06:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24221 to 24097. [2021-11-19 14:06:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24097 states, 18615 states have (on average 1.3901154982540962) internal successors, (25877), 19068 states have internal predecessors, (25877), 3754 states have call successors, (3754), 1727 states have call predecessors, (3754), 1727 states have return successors, (3808), 3655 states have call predecessors, (3808), 3724 states have call successors, (3808) [2021-11-19 14:06:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24097 states to 24097 states and 33439 transitions. [2021-11-19 14:06:57,988 INFO L78 Accepts]: Start accepts. Automaton has 24097 states and 33439 transitions. Word has length 329 [2021-11-19 14:06:57,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:57,989 INFO L470 AbstractCegarLoop]: Abstraction has 24097 states and 33439 transitions. [2021-11-19 14:06:57,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 4 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-19 14:06:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 24097 states and 33439 transitions. [2021-11-19 14:06:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-19 14:06:58,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:58,012 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-11-19 14:06:58,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:58,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:58,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:06:58,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash -219536827, now seen corresponding path program 1 times [2021-11-19 14:06:58,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:58,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572210474] [2021-11-19 14:06:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:58,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:58,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:58,439 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:58,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:06:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:00,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:07:00,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 320 proven. 1 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2021-11-19 14:07:03,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2021-11-19 14:07:06,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:06,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572210474] [2021-11-19 14:07:06,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572210474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:07:06,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1974633812] [2021-11-19 14:07:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:06,483 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:07:06,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:07:06,484 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:07:06,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:07:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:07,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:07:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2021-11-19 14:07:08,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2021-11-19 14:07:09,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1974633812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:09,646 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:07:09,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:07:09,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527440007] [2021-11-19 14:07:09,646 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:09,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:07:09,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:09,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:07:09,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:09,648 INFO L87 Difference]: Start difference. First operand 24097 states and 33439 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-19 14:07:11,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:12,661 INFO L93 Difference]: Finished difference Result 41791 states and 57574 transitions. [2021-11-19 14:07:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:07:12,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 380 [2021-11-19 14:07:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:12,754 INFO L225 Difference]: With dead ends: 41791 [2021-11-19 14:07:12,754 INFO L226 Difference]: Without dead ends: 17747 [2021-11-19 14:07:12,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1516 GetRequests, 1506 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:12,908 INFO L933 BasicCegarLoop]: 1335 mSDtfsCounter, 8 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:12,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2658 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:07:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17747 states. [2021-11-19 14:07:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17747 to 15752. [2021-11-19 14:07:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15752 states, 12172 states have (on average 1.3933618139993427) internal successors, (16960), 12469 states have internal predecessors, (16960), 2441 states have call successors, (2441), 1139 states have call predecessors, (2441), 1138 states have return successors, (2462), 2370 states have call predecessors, (2462), 2411 states have call successors, (2462) [2021-11-19 14:07:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 21863 transitions. [2021-11-19 14:07:13,958 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 21863 transitions. Word has length 380 [2021-11-19 14:07:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:13,959 INFO L470 AbstractCegarLoop]: Abstraction has 15752 states and 21863 transitions. [2021-11-19 14:07:13,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-19 14:07:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 21863 transitions. [2021-11-19 14:07:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-11-19 14:07:13,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:13,979 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-11-19 14:07:14,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:14,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:14,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:07:14,404 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:07:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash 77566766, now seen corresponding path program 1 times [2021-11-19 14:07:14,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:14,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996631898] [2021-11-19 14:07:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:14,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:14,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:14,407 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:14,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:07:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:15,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:07:15,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-19 14:07:19,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2021-11-19 14:07:22,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:22,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996631898] [2021-11-19 14:07:22,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996631898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:07:22,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [622632515] [2021-11-19 14:07:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:22,525 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:07:22,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:07:22,526 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:07:22,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 14:07:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:23,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:07:23,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-11-19 14:07:25,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-11-19 14:07:26,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [622632515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:26,311 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:07:26,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7, 7] total 15 [2021-11-19 14:07:26,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821894621] [2021-11-19 14:07:26,312 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:26,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:07:26,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:07:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:07:26,313 INFO L87 Difference]: Start difference. First operand 15752 states and 21863 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-19 14:07:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:27,792 INFO L93 Difference]: Finished difference Result 29310 states and 41929 transitions. [2021-11-19 14:07:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:07:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 1 states have call successors, (31) Word has length 376 [2021-11-19 14:07:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:27,870 INFO L225 Difference]: With dead ends: 29310 [2021-11-19 14:07:27,871 INFO L226 Difference]: Without dead ends: 22443 [2021-11-19 14:07:27,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1502 GetRequests, 1488 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:07:27,890 INFO L933 BasicCegarLoop]: 1758 mSDtfsCounter, 843 mSDsluCounter, 6591 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 8349 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:27,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 8349 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:07:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22443 states. [2021-11-19 14:07:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22443 to 15743. [2021-11-19 14:07:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15743 states, 12164 states have (on average 1.3929628411706676) internal successors, (16944), 12460 states have internal predecessors, (16944), 2440 states have call successors, (2440), 1139 states have call predecessors, (2440), 1138 states have return successors, (2462), 2370 states have call predecessors, (2462), 2411 states have call successors, (2462) [2021-11-19 14:07:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15743 states to 15743 states and 21846 transitions. [2021-11-19 14:07:29,026 INFO L78 Accepts]: Start accepts. Automaton has 15743 states and 21846 transitions. Word has length 376 [2021-11-19 14:07:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:29,027 INFO L470 AbstractCegarLoop]: Abstraction has 15743 states and 21846 transitions. [2021-11-19 14:07:29,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-19 14:07:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15743 states and 21846 transitions. [2021-11-19 14:07:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-11-19 14:07:29,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:29,050 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:29,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:29,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-19 14:07:29,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:29,460 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:07:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:29,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2084470296, now seen corresponding path program 1 times [2021-11-19 14:07:29,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:29,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120928280] [2021-11-19 14:07:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:29,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:29,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:29,464 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:29,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:07:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:07:31,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2021-11-19 14:07:34,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2021-11-19 14:07:37,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:37,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120928280] [2021-11-19 14:07:37,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120928280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:07:37,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1416458027] [2021-11-19 14:07:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:37,659 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:07:37,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:07:37,660 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:07:37,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 14:07:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:07:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2021-11-19 14:07:43,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2021-11-19 14:07:46,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1416458027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:07:46,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90874417] [2021-11-19 14:07:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:46,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:07:46,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:07:46,366 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:07:46,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-19 14:07:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:50,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:07:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-11-19 14:07:53,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2021-11-19 14:07:56,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90874417] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:07:56,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 14:07:56,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7, 7, 7, 6] total 17 [2021-11-19 14:07:56,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242195539] [2021-11-19 14:07:56,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:56,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:07:56,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:07:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:07:56,764 INFO L87 Difference]: Start difference. First operand 15743 states and 21846 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 14:07:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:58,229 INFO L93 Difference]: Finished difference Result 31570 states and 43837 transitions. [2021-11-19 14:07:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:07:58,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 377 [2021-11-19 14:07:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:58,295 INFO L225 Difference]: With dead ends: 31570 [2021-11-19 14:07:58,295 INFO L226 Difference]: Without dead ends: 15788 [2021-11-19 14:07:58,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2257 GetRequests, 2241 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:07:58,334 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 155 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 3916 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:58,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 3916 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:07:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15788 states. [2021-11-19 14:07:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15788 to 15775. [2021-11-19 14:07:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 12193 states have (on average 1.3911260559337324) internal successors, (16962), 12490 states have internal predecessors, (16962), 2443 states have call successors, (2443), 1139 states have call predecessors, (2443), 1138 states have return successors, (2465), 2372 states have call predecessors, (2465), 2414 states have call successors, (2465) [2021-11-19 14:07:59,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 21870 transitions. [2021-11-19 14:07:59,344 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 21870 transitions. Word has length 377 [2021-11-19 14:07:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:59,344 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 21870 transitions. [2021-11-19 14:07:59,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 14:07:59,344 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 21870 transitions. [2021-11-19 14:07:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-11-19 14:07:59,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:59,362 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 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] [2021-11-19 14:07:59,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:59,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-19 14:07:59,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:59,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:07:59,988 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:07:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:59,988 INFO L85 PathProgramCache]: Analyzing trace with hash -928259058, now seen corresponding path program 1 times [2021-11-19 14:07:59,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:59,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417126035] [2021-11-19 14:07:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:59,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:59,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:59,992 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:59,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:08:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:01,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:08:01,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-11-19 14:08:04,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2021-11-19 14:08:08,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:08,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417126035] [2021-11-19 14:08:08,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417126035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:08:08,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [762702206] [2021-11-19 14:08:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:08,219 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:08:08,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:08:08,220 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:08:08,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 14:08:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:11,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:08:11,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-11-19 14:08:14,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2021-11-19 14:08:17,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [762702206] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:08:17,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785839566] [2021-11-19 14:08:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:17,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:08:17,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:08:17,107 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:08:17,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-19 14:08:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:20,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 14:08:20,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2021-11-19 14:08:29,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-19 14:08:41,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785839566] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:08:41,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 14:08:41,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 7, 7, 7, 13] total 33 [2021-11-19 14:08:41,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602345374] [2021-11-19 14:08:41,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:41,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:08:41,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:08:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 14:08:41,066 INFO L87 Difference]: Start difference. First operand 15775 states and 21870 transitions. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 11 states have internal predecessors, (133), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (36), 5 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:08:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:45,152 INFO L93 Difference]: Finished difference Result 42459 states and 58814 transitions. [2021-11-19 14:08:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:08:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 11 states have internal predecessors, (133), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (36), 5 states have call predecessors, (36), 3 states have call successors, (36) Word has length 377 [2021-11-19 14:08:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:45,265 INFO L225 Difference]: With dead ends: 42459 [2021-11-19 14:08:45,265 INFO L226 Difference]: Without dead ends: 26744 [2021-11-19 14:08:45,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2259 GetRequests, 2225 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 14:08:45,313 INFO L933 BasicCegarLoop]: 1706 mSDtfsCounter, 1171 mSDsluCounter, 17332 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 19038 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 675 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:45,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 19038 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 675 Unchecked, 0.2s Time] [2021-11-19 14:08:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26744 states. [2021-11-19 14:08:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26744 to 26494. [2021-11-19 14:08:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26494 states, 20567 states have (on average 1.391063353916468) internal successors, (28610), 21049 states have internal predecessors, (28610), 4013 states have call successors, (4013), 1899 states have call predecessors, (4013), 1913 states have return successors, (4100), 3902 states have call predecessors, (4100), 3984 states have call successors, (4100) [2021-11-19 14:08:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26494 states to 26494 states and 36723 transitions. [2021-11-19 14:08:46,844 INFO L78 Accepts]: Start accepts. Automaton has 26494 states and 36723 transitions. Word has length 377 [2021-11-19 14:08:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:46,845 INFO L470 AbstractCegarLoop]: Abstraction has 26494 states and 36723 transitions. [2021-11-19 14:08:46,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 11 states have internal predecessors, (133), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (36), 5 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:08:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26494 states and 36723 transitions. [2021-11-19 14:08:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-19 14:08:46,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:46,870 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-11-19 14:08:46,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:47,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:47,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:47,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:08:47,471 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:08:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:47,471 INFO L85 PathProgramCache]: Analyzing trace with hash 854161351, now seen corresponding path program 1 times [2021-11-19 14:08:47,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:47,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582185908] [2021-11-19 14:08:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:47,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:47,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:47,474 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:47,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:08:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 2669 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:08:49,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 432 proven. 1 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-11-19 14:08:53,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 1133 trivial. 0 not checked. [2021-11-19 14:08:56,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:56,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582185908] [2021-11-19 14:08:56,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582185908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:08:56,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [77745277] [2021-11-19 14:08:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:56,580 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:08:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:08:56,580 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:08:56,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-19 14:08:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:57,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2669 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:08:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2021-11-19 14:09:00,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2021-11-19 14:09:01,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [77745277] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:01,983 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:09:01,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-19 14:09:01,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77448304] [2021-11-19 14:09:01,983 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:01,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:09:01,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:01,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:09:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:09:01,985 INFO L87 Difference]: Start difference. First operand 26494 states and 36723 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 4 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (48), 4 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-19 14:09:04,138 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:10,807 INFO L93 Difference]: Finished difference Result 74284 states and 103447 transitions. [2021-11-19 14:09:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:09:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 4 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (48), 4 states have call predecessors, (48), 4 states have call successors, (48) Word has length 397 [2021-11-19 14:09:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:11,026 INFO L225 Difference]: With dead ends: 74284 [2021-11-19 14:09:11,027 INFO L226 Difference]: Without dead ends: 47866 [2021-11-19 14:09:11,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:09:11,110 INFO L933 BasicCegarLoop]: 2267 mSDtfsCounter, 1969 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1969 SdHoareTripleChecker+Valid, 4445 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:11,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1969 Valid, 4445 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 342 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-11-19 14:09:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47866 states. [2021-11-19 14:09:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47866 to 47252. [2021-11-19 14:09:13,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47252 states, 37235 states have (on average 1.4021216597287498) internal successors, (52208), 38073 states have internal predecessors, (52208), 6653 states have call successors, (6653), 3369 states have call predecessors, (6653), 3363 states have return successors, (6808), 6426 states have call predecessors, (6808), 6624 states have call successors, (6808) [2021-11-19 14:09:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47252 states to 47252 states and 65669 transitions. [2021-11-19 14:09:13,855 INFO L78 Accepts]: Start accepts. Automaton has 47252 states and 65669 transitions. Word has length 397 [2021-11-19 14:09:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:13,855 INFO L470 AbstractCegarLoop]: Abstraction has 47252 states and 65669 transitions. [2021-11-19 14:09:13,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 4 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (48), 4 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-19 14:09:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 47252 states and 65669 transitions. [2021-11-19 14:09:13,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-19 14:09:13,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:13,887 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 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] [2021-11-19 14:09:13,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:14,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:14,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:14,288 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:14,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash 670664608, now seen corresponding path program 1 times [2021-11-19 14:09:14,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:14,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925343466] [2021-11-19 14:09:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:14,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:14,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:14,291 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:14,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:09:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:09:15,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 432 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-19 14:09:19,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2021-11-19 14:09:23,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:23,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925343466] [2021-11-19 14:09:23,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925343466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:23,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1878237253] [2021-11-19 14:09:23,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:23,648 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:09:23,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:09:23,655 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:09:23,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-19 14:09:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:27,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:09:27,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 432 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-19 14:09:31,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2021-11-19 14:09:34,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1878237253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:34,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564357295] [2021-11-19 14:09:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:34,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:09:34,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:09:34,011 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:09:34,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-19 14:09:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:37,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:09:37,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 606 proven. 1 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2021-11-19 14:09:41,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2021-11-19 14:09:44,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564357295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:44,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:09:44,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-11-19 14:09:44,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722384651] [2021-11-19 14:09:44,215 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:09:44,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:09:44,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:09:44,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:09:44,217 INFO L87 Difference]: Start difference. First operand 47252 states and 65669 transitions. Second operand has 13 states, 10 states have (on average 18.4) internal successors, (184), 13 states have internal predecessors, (184), 5 states have call successors, (70), 2 states have call predecessors, (70), 6 states have return successors, (70), 5 states have call predecessors, (70), 5 states have call successors, (70) [2021-11-19 14:09:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:49,054 INFO L93 Difference]: Finished difference Result 94721 states and 132037 transitions. [2021-11-19 14:09:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:09:49,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 18.4) internal successors, (184), 13 states have internal predecessors, (184), 5 states have call successors, (70), 2 states have call predecessors, (70), 6 states have return successors, (70), 5 states have call predecessors, (70), 5 states have call successors, (70) Word has length 414 [2021-11-19 14:09:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:49,310 INFO L225 Difference]: With dead ends: 94721 [2021-11-19 14:09:49,311 INFO L226 Difference]: Without dead ends: 47338 [2021-11-19 14:09:49,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2482 GetRequests, 2467 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:09:49,718 INFO L933 BasicCegarLoop]: 1323 mSDtfsCounter, 19 mSDsluCounter, 7896 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9219 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:49,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 9219 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 14:09:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47338 states. [2021-11-19 14:09:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47338 to 47338. [2021-11-19 14:09:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47338 states, 37319 states have (on average 1.4012165384924569) internal successors, (52292), 38157 states have internal predecessors, (52292), 6654 states have call successors, (6654), 3370 states have call predecessors, (6654), 3364 states have return successors, (6809), 6427 states have call predecessors, (6809), 6625 states have call successors, (6809) [2021-11-19 14:09:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47338 states to 47338 states and 65755 transitions. [2021-11-19 14:09:52,202 INFO L78 Accepts]: Start accepts. Automaton has 47338 states and 65755 transitions. Word has length 414 [2021-11-19 14:09:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:52,203 INFO L470 AbstractCegarLoop]: Abstraction has 47338 states and 65755 transitions. [2021-11-19 14:09:52,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 18.4) internal successors, (184), 13 states have internal predecessors, (184), 5 states have call successors, (70), 2 states have call predecessors, (70), 6 states have return successors, (70), 5 states have call predecessors, (70), 5 states have call successors, (70) [2021-11-19 14:09:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 47338 states and 65755 transitions. [2021-11-19 14:09:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-11-19 14:09:52,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:52,233 INFO L514 BasicCegarLoop]: trace histogram [18, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 3, 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] [2021-11-19 14:09:52,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-19 14:09:52,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:52,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:52,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:09:52,848 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1963528787, now seen corresponding path program 2 times [2021-11-19 14:09:52,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:52,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409631816] [2021-11-19 14:09:52,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:09:52,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:52,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:52,852 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:52,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:09:53,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 14:09:53,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:53,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 14:09:53,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1429 trivial. 0 not checked. [2021-11-19 14:10:00,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1427 trivial. 0 not checked. [2021-11-19 14:10:15,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:15,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409631816] [2021-11-19 14:10:15,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409631816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:15,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:15,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17, 17] imperfect sequences [] total 32 [2021-11-19 14:10:15,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158815499] [2021-11-19 14:10:15,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:15,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 14:10:15,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:15,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 14:10:15,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-11-19 14:10:15,100 INFO L87 Difference]: Start difference. First operand 47338 states and 65755 transitions. Second operand has 32 states, 28 states have (on average 5.428571428571429) internal successors, (152), 26 states have internal predecessors, (152), 6 states have call successors, (45), 2 states have call predecessors, (45), 8 states have return successors, (43), 8 states have call predecessors, (43), 6 states have call successors, (43) [2021-11-19 14:10:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:27,939 INFO L93 Difference]: Finished difference Result 108215 states and 152615 transitions. [2021-11-19 14:10:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 14:10:27,940 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 5.428571428571429) internal successors, (152), 26 states have internal predecessors, (152), 6 states have call successors, (45), 2 states have call predecessors, (45), 8 states have return successors, (43), 8 states have call predecessors, (43), 6 states have call successors, (43) Word has length 423 [2021-11-19 14:10:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:28,200 INFO L225 Difference]: With dead ends: 108215 [2021-11-19 14:10:28,200 INFO L226 Difference]: Without dead ends: 60935 [2021-11-19 14:10:28,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 14:10:28,333 INFO L933 BasicCegarLoop]: 1736 mSDtfsCounter, 789 mSDsluCounter, 39747 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 41483 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:28,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 41483 Invalid, 479 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 369 Invalid, 0 Unknown, 53 Unchecked, 4.9s Time] [2021-11-19 14:10:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60935 states. [2021-11-19 14:10:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60935 to 47650. [2021-11-19 14:10:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47650 states, 37551 states have (on average 1.3985246731112353) internal successors, (52516), 38373 states have internal predecessors, (52516), 6710 states have call successors, (6710), 3370 states have call predecessors, (6710), 3388 states have return successors, (6899), 6499 states have call predecessors, (6899), 6681 states have call successors, (6899) [2021-11-19 14:10:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47650 states to 47650 states and 66125 transitions. [2021-11-19 14:10:30,926 INFO L78 Accepts]: Start accepts. Automaton has 47650 states and 66125 transitions. Word has length 423 [2021-11-19 14:10:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:30,927 INFO L470 AbstractCegarLoop]: Abstraction has 47650 states and 66125 transitions. [2021-11-19 14:10:30,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 5.428571428571429) internal successors, (152), 26 states have internal predecessors, (152), 6 states have call successors, (45), 2 states have call predecessors, (45), 8 states have return successors, (43), 8 states have call predecessors, (43), 6 states have call successors, (43) [2021-11-19 14:10:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 47650 states and 66125 transitions. [2021-11-19 14:10:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-19 14:10:30,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:30,956 INFO L514 BasicCegarLoop]: trace histogram [18, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 4, 3, 3, 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] [2021-11-19 14:10:30,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:31,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:31,157 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:10:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1601118687, now seen corresponding path program 1 times [2021-11-19 14:10:31,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:31,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405631361] [2021-11-19 14:10:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:31,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:31,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:31,160 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:31,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 14:10:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:32,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:10:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 472 proven. 3 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-11-19 14:10:37,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 1327 trivial. 0 not checked. [2021-11-19 14:10:41,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:41,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405631361] [2021-11-19 14:10:41,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405631361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:41,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [488032484] [2021-11-19 14:10:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:41,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:10:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:10:41,267 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:10:41,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-19 14:10:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:10:44,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 472 proven. 3 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-11-19 14:10:48,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 1327 trivial. 0 not checked. [2021-11-19 14:10:50,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [488032484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:50,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128623963] [2021-11-19 14:10:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:50,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:10:50,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:10:50,890 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:10:50,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 14:10:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:54,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 14:10:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1435 trivial. 0 not checked. [2021-11-19 14:11:02,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2021-11-19 14:11:13,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128623963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:13,659 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:11:13,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [8, 8, 8, 8] total 35 [2021-11-19 14:11:13,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520567377] [2021-11-19 14:11:13,660 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:13,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 14:11:13,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 14:11:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 14:11:13,662 INFO L87 Difference]: Start difference. First operand 47650 states and 66125 transitions. Second operand has 24 states, 24 states have (on average 6.125) internal successors, (147), 20 states have internal predecessors, (147), 4 states have call successors, (42), 2 states have call predecessors, (42), 6 states have return successors, (39), 8 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 14:11:15,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:33,958 INFO L93 Difference]: Finished difference Result 128480 states and 181035 transitions. [2021-11-19 14:11:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 14:11:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.125) internal successors, (147), 20 states have internal predecessors, (147), 4 states have call successors, (42), 2 states have call predecessors, (42), 6 states have return successors, (39), 8 states have call predecessors, (39), 4 states have call successors, (39) Word has length 427 [2021-11-19 14:11:33,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:34,235 INFO L225 Difference]: With dead ends: 128480 [2021-11-19 14:11:34,235 INFO L226 Difference]: Without dead ends: 80912 [2021-11-19 14:11:34,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2575 GetRequests, 2527 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=180, Invalid=2270, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 14:11:34,332 INFO L933 BasicCegarLoop]: 3203 mSDtfsCounter, 1756 mSDsluCounter, 56037 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 158 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 59240 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:34,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 59240 Invalid, 1277 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [158 Valid, 378 Invalid, 1 Unknown, 740 Unchecked, 7.6s Time] [2021-11-19 14:11:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80912 states. [2021-11-19 14:11:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80912 to 68334. [2021-11-19 14:11:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68334 states, 54342 states have (on average 1.4076773030068823) internal successors, (76496), 55811 states have internal predecessors, (76496), 9307 states have call successors, (9307), 4729 states have call predecessors, (9307), 4684 states have return successors, (9872), 8528 states have call predecessors, (9872), 9278 states have call successors, (9872) [2021-11-19 14:11:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68334 states to 68334 states and 95675 transitions. [2021-11-19 14:11:38,024 INFO L78 Accepts]: Start accepts. Automaton has 68334 states and 95675 transitions. Word has length 427 [2021-11-19 14:11:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:38,024 INFO L470 AbstractCegarLoop]: Abstraction has 68334 states and 95675 transitions. [2021-11-19 14:11:38,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.125) internal successors, (147), 20 states have internal predecessors, (147), 4 states have call successors, (42), 2 states have call predecessors, (42), 6 states have return successors, (39), 8 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 14:11:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 68334 states and 95675 transitions. [2021-11-19 14:11:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-19 14:11:38,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:38,052 INFO L514 BasicCegarLoop]: trace histogram [18, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-11-19 14:11:38,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:38,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:38,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:38,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:11:38,656 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:11:38,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1948293406, now seen corresponding path program 1 times [2021-11-19 14:11:38,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:38,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077372988] [2021-11-19 14:11:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:38,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:38,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:38,659 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:38,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 14:11:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:40,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2792 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:11:40,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 472 proven. 3 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2021-11-19 14:11:44,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 1289 trivial. 0 not checked. [2021-11-19 14:11:49,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:49,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077372988] [2021-11-19 14:11:49,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077372988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:11:49,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1357574973] [2021-11-19 14:11:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:49,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:11:49,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:11:49,135 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:11:49,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-19 14:11:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:50,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 2792 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:11:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1412 trivial. 0 not checked. [2021-11-19 14:11:52,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1412 trivial. 0 not checked. [2021-11-19 14:11:54,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1357574973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:54,529 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:11:54,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 21 [2021-11-19 14:11:54,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717943232] [2021-11-19 14:11:54,530 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:54,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:11:54,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:54,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:11:54,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:11:54,533 INFO L87 Difference]: Start difference. First operand 68334 states and 95675 transitions. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 8 states have internal predecessors, (143), 2 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (38), 3 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-19 14:12:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:00,340 INFO L93 Difference]: Finished difference Result 157535 states and 224316 transitions. [2021-11-19 14:12:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:00,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 8 states have internal predecessors, (143), 2 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (38), 3 states have call predecessors, (38), 1 states have call successors, (38) Word has length 427 [2021-11-19 14:12:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:00,806 INFO L225 Difference]: With dead ends: 157535 [2021-11-19 14:12:00,806 INFO L226 Difference]: Without dead ends: 89283 [2021-11-19 14:12:00,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1706 GetRequests, 1686 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:12:00,947 INFO L933 BasicCegarLoop]: 1964 mSDtfsCounter, 835 mSDsluCounter, 12835 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 14799 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:00,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 14799 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:01,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89283 states. [2021-11-19 14:12:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89283 to 68156. [2021-11-19 14:12:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68156 states, 54185 states have (on average 1.4068653686444588) internal successors, (76231), 55661 states have internal predecessors, (76231), 9286 states have call successors, (9286), 4729 states have call predecessors, (9286), 4684 states have return successors, (9832), 8500 states have call predecessors, (9832), 9258 states have call successors, (9832) [2021-11-19 14:12:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68156 states to 68156 states and 95349 transitions. [2021-11-19 14:12:05,158 INFO L78 Accepts]: Start accepts. Automaton has 68156 states and 95349 transitions. Word has length 427 [2021-11-19 14:12:05,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:05,159 INFO L470 AbstractCegarLoop]: Abstraction has 68156 states and 95349 transitions. [2021-11-19 14:12:05,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 8 states have internal predecessors, (143), 2 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (38), 3 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-19 14:12:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 68156 states and 95349 transitions. [2021-11-19 14:12:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-11-19 14:12:05,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:05,194 INFO L514 BasicCegarLoop]: trace histogram [18, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-11-19 14:12:05,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:05,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:05,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:12:05,620 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:12:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1821388622, now seen corresponding path program 1 times [2021-11-19 14:12:05,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:05,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003517451] [2021-11-19 14:12:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:12:05,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:05,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:05,623 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:05,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:12:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:07,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 2799 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:12:07,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 472 proven. 3 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2021-11-19 14:12:11,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 1289 trivial. 0 not checked. [2021-11-19 14:12:15,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:15,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003517451] [2021-11-19 14:12:15,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003517451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:12:15,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1860519762] [2021-11-19 14:12:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:12:15,456 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:12:15,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:12:15,456 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:12:15,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-19 14:12:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 2799 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:12:16,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1412 trivial. 0 not checked. [2021-11-19 14:12:18,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1412 trivial. 0 not checked. [2021-11-19 14:12:20,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1860519762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:20,764 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:12:20,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 21 [2021-11-19 14:12:20,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883130344] [2021-11-19 14:12:20,765 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:20,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:12:20,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:12:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:12:20,766 INFO L87 Difference]: Start difference. First operand 68156 states and 95349 transitions. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 8 states have internal predecessors, (144), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 3 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-19 14:12:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:24,104 INFO L93 Difference]: Finished difference Result 68321 states and 95573 transitions. [2021-11-19 14:12:24,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:24,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 8 states have internal predecessors, (144), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 3 states have call predecessors, (38), 1 states have call successors, (38) Word has length 429 [2021-11-19 14:12:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:24,319 INFO L225 Difference]: With dead ends: 68321 [2021-11-19 14:12:24,319 INFO L226 Difference]: Without dead ends: 68310 [2021-11-19 14:12:24,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1713 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:12:24,342 INFO L933 BasicCegarLoop]: 1339 mSDtfsCounter, 11 mSDsluCounter, 6663 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 8002 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:24,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 8002 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:12:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68310 states. [2021-11-19 14:12:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68310 to 68150. [2021-11-19 14:12:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68150 states, 54180 states have (on average 1.4064784053156145) internal successors, (76203), 55655 states have internal predecessors, (76203), 9285 states have call successors, (9285), 4729 states have call predecessors, (9285), 4684 states have return successors, (9832), 8500 states have call predecessors, (9832), 9258 states have call successors, (9832) [2021-11-19 14:12:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68150 states to 68150 states and 95320 transitions. [2021-11-19 14:12:27,682 INFO L78 Accepts]: Start accepts. Automaton has 68150 states and 95320 transitions. Word has length 429 [2021-11-19 14:12:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:27,683 INFO L470 AbstractCegarLoop]: Abstraction has 68150 states and 95320 transitions. [2021-11-19 14:12:27,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 8 states have internal predecessors, (144), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 3 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-19 14:12:27,684 INFO L276 IsEmpty]: Start isEmpty. Operand 68150 states and 95320 transitions. [2021-11-19 14:12:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-11-19 14:12:27,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:27,731 INFO L514 BasicCegarLoop]: trace histogram [18, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-11-19 14:12:27,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:27,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-19 14:12:28,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:28,142 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:12:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash 412154208, now seen corresponding path program 1 times [2021-11-19 14:12:28,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:28,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306560115] [2021-11-19 14:12:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:12:28,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:28,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:28,146 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:28,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 14:12:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:29,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2823 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:12:29,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 472 proven. 3 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2021-11-19 14:12:34,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 1292 trivial. 0 not checked. [2021-11-19 14:12:38,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:38,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306560115] [2021-11-19 14:12:38,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306560115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:12:38,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [884447408] [2021-11-19 14:12:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:12:38,544 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:12:38,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:12:38,545 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:12:38,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-19 14:12:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:39,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2823 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:12:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1417 trivial. 0 not checked. [2021-11-19 14:12:43,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2021-11-19 14:12:49,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [884447408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:49,606 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:12:49,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [8, 8] total 27 [2021-11-19 14:12:49,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929331515] [2021-11-19 14:12:49,606 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:49,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:12:49,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:12:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-11-19 14:12:49,608 INFO L87 Difference]: Start difference. First operand 68150 states and 95320 transitions. Second operand has 16 states, 16 states have (on average 10.5) internal successors, (168), 12 states have internal predecessors, (168), 2 states have call successors, (49), 2 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-19 14:12:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:57,740 INFO L93 Difference]: Finished difference Result 164258 states and 234683 transitions. [2021-11-19 14:12:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:12:57,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.5) internal successors, (168), 12 states have internal predecessors, (168), 2 states have call successors, (49), 2 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 2 states have call successors, (48) Word has length 436 [2021-11-19 14:12:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:58,066 INFO L225 Difference]: With dead ends: 164258 [2021-11-19 14:12:58,067 INFO L226 Difference]: Without dead ends: 96190 [2021-11-19 14:12:58,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1742 GetRequests, 1715 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-11-19 14:12:58,201 INFO L933 BasicCegarLoop]: 1581 mSDtfsCounter, 502 mSDsluCounter, 18682 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 20263 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:58,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 20263 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 14:12:58,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96190 states. [2021-11-19 14:13:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96190 to 68510. [2021-11-19 14:13:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68510 states, 54460 states have (on average 1.4043885420492104) internal successors, (76483), 55935 states have internal predecessors, (76483), 9285 states have call successors, (9285), 4729 states have call predecessors, (9285), 4764 states have return successors, (9948), 8580 states have call predecessors, (9948), 9258 states have call successors, (9948) [2021-11-19 14:13:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68510 states to 68510 states and 95716 transitions. [2021-11-19 14:13:02,094 INFO L78 Accepts]: Start accepts. Automaton has 68510 states and 95716 transitions. Word has length 436 [2021-11-19 14:13:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:02,095 INFO L470 AbstractCegarLoop]: Abstraction has 68510 states and 95716 transitions. [2021-11-19 14:13:02,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.5) internal successors, (168), 12 states have internal predecessors, (168), 2 states have call successors, (49), 2 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-19 14:13:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 68510 states and 95716 transitions. [2021-11-19 14:13:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-19 14:13:02,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:02,126 INFO L514 BasicCegarLoop]: trace histogram [18, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:02,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:02,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:02,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:02,528 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:13:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -903119698, now seen corresponding path program 1 times [2021-11-19 14:13:02,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:02,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712933644] [2021-11-19 14:13:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:13:02,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:02,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:02,531 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:02,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 14:13:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 2816 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:13:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 472 proven. 3 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2021-11-19 14:13:08,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2021-11-19 14:13:12,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:12,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712933644] [2021-11-19 14:13:12,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712933644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:12,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1947651857] [2021-11-19 14:13:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:13:12,749 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:13:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:13:12,749 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:13:12,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e15360d-f6cf-4392-8d43-ec072f9063e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-19 14:13:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2816 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:13:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1414 trivial. 0 not checked. [2021-11-19 14:13:15,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1412 trivial. 0 not checked. [2021-11-19 14:13:17,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1947651857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:17,170 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:13:17,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8, 8] total 17 [2021-11-19 14:13:17,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958024021] [2021-11-19 14:13:17,171 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:17,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:13:17,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:17,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:13:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:13:17,172 INFO L87 Difference]: Start difference. First operand 68510 states and 95716 transitions. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-19 14:13:19,353 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []