./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:35:06,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:35:06,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:35:06,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:35:06,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:35:06,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:35:06,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:35:06,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:35:06,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:35:06,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:35:06,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:35:06,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:35:06,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:35:06,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:35:06,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:35:06,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:35:06,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:35:06,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:35:06,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:35:06,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:35:06,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:35:06,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:35:06,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:35:06,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:35:06,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:35:06,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:35:06,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:35:06,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:35:06,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:35:06,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:35:06,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:35:06,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:35:06,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:35:06,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:35:06,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:35:06,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:35:06,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:35:06,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:35:06,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:35:06,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:35:06,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:35:06,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:35:06,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:35:06,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:35:06,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:35:06,671 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:35:06,672 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:35:06,672 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:35:06,672 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:35:06,672 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:35:06,673 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:35:06,673 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:35:06,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:35:06,675 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:35:06,675 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:35:06,675 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:35:06,675 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:35:06,676 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:35:06,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:35:06,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:35:06,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:35:06,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:35:06,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:35:06,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:35:06,688 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:35:06,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:35:06,689 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:35:06,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:35:06,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:35:06,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:35:06,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:06,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:35:06,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:35:06,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:35:06,691 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:35:06,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:35:06,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:35:06,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:35:06,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:35:06,693 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_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 [2021-11-12 22:35:06,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:35:07,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:35:07,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:35:07,017 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:35:07,018 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:35:07,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-12 22:35:07,115 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data/f9b971a00/a2c5fff23162415faafa57727938337e/FLAG592055201 [2021-11-12 22:35:08,112 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:35:08,113 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-12 22:35:08,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data/f9b971a00/a2c5fff23162415faafa57727938337e/FLAG592055201 [2021-11-12 22:35:08,498 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data/f9b971a00/a2c5fff23162415faafa57727938337e [2021-11-12 22:35:08,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:35:08,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:35:08,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:08,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:35:08,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:35:08,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:08" (1/1) ... [2021-11-12 22:35:08,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6c2f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:08, skipping insertion in model container [2021-11-12 22:35:08,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:08" (1/1) ... [2021-11-12 22:35:08,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:35:08,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:35:10,552 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:35:10,554 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:35:10,694 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-12 22:35:10,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:10,914 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:35:10,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6474026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:10, skipping insertion in model container [2021-11-12 22:35:10,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:10,917 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:35:10,920 INFO L158 Benchmark]: Toolchain (without parser) took 2415.92ms. Allocated memory is still 153.1MB. Free memory was 114.1MB in the beginning and 102.4MB in the end (delta: 11.7MB). Peak memory consumption was 68.2MB. Max. memory is 16.1GB. [2021-11-12 22:35:10,921 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 92.3MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:35:10,941 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2413.12ms. Allocated memory is still 153.1MB. Free memory was 113.9MB in the beginning and 102.4MB in the end (delta: 11.4MB). Peak memory consumption was 68.2MB. Max. memory is 16.1GB. [2021-11-12 22:35:10,956 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 92.3MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2413.12ms. Allocated memory is still 153.1MB. Free memory was 113.9MB in the beginning and 102.4MB in the end (delta: 11.4MB). Peak memory consumption was 68.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6325]: 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_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:35:13,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:35:13,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:35:13,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:35:13,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:35:13,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:35:13,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:35:13,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:35:13,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:35:13,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:35:13,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:35:13,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:35:13,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:35:13,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:35:13,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:35:13,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:35:13,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:35:13,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:35:13,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:35:13,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:35:13,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:35:13,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:35:13,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:35:13,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:35:13,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:35:13,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:35:13,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:35:13,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:35:13,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:35:13,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:35:13,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:35:13,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:35:13,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:35:13,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:35:13,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:35:13,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:35:13,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:35:13,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:35:13,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:35:13,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:35:13,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:35:13,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:35:13,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:35:13,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:35:13,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:35:13,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:35:13,724 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:35:13,724 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:35:13,724 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:35:13,725 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:35:13,725 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:35:13,725 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:35:13,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:35:13,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:35:13,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:35:13,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:35:13,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:35:13,729 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:35:13,729 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:35:13,729 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:35:13,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:35:13,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:35:13,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:35:13,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:35:13,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:35:13,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:35:13,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:13,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:35:13,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:35:13,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:35:13,732 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:35:13,733 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:13,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:35:13,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:35:13,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:35:13,734 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_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 [2021-11-12 22:35:14,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:35:14,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:35:14,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:35:14,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:35:14,176 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:35:14,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-12 22:35:14,273 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data/fdafc92e8/ebfa039b9aa14660a682305c3502f88e/FLAGf2aa29858 [2021-11-12 22:35:15,419 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:35:15,419 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-12 22:35:15,471 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data/fdafc92e8/ebfa039b9aa14660a682305c3502f88e/FLAGf2aa29858 [2021-11-12 22:35:15,759 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/data/fdafc92e8/ebfa039b9aa14660a682305c3502f88e [2021-11-12 22:35:15,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:35:15,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:35:15,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:15,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:35:15,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:35:15,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:15" (1/1) ... [2021-11-12 22:35:15,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7c4169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:15, skipping insertion in model container [2021-11-12 22:35:15,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:15" (1/1) ... [2021-11-12 22:35:15,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:35:15,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:35:18,231 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-12 22:35:18,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:18,362 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:35:18,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:35:18,861 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-12 22:35:18,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:18,925 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:35:19,405 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-12 22:35:19,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:19,714 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:35:19,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19 WrapperNode [2021-11-12 22:35:19,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:19,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:19,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:35:19,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:35:19,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:19,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:19,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:19,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:35:19,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:35:19,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:35:19,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:19,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:20,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:20,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:20,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:20,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:20,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:20,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:35:20,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:35:20,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:35:20,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:35:20,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (1/1) ... [2021-11-12 22:35:20,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:20,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:20,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:35:20,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:35:20,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:35:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_drvinfo [2021-11-12 22:35:20,454 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_drvinfo [2021-11-12 22:35:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_running [2021-11-12 22:35:20,454 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_running [2021-11-12 22:35:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:35:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:35:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:35:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 22:35:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:35:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-12 22:35:20,455 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-12 22:35:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 22:35:20,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 22:35:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 22:35:20,456 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 22:35:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-12 22:35:20,457 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-12 22:35:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-12 22:35:20,457 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-12 22:35:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-12 22:35:20,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-12 22:35:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:35:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:35:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2021-11-12 22:35:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2021-11-12 22:35:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 22:35:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 22:35:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-12 22:35:20,459 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-12 22:35:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-12 22:35:20,459 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-12 22:35:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:35:20,459 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:35:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:35:20,460 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:35:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 22:35:20,461 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 22:35:20,461 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-12 22:35:20,461 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-12 22:35:20,461 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-12 22:35:20,462 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-12 22:35:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:35:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-12 22:35:20,462 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-12 22:35:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-12 22:35:20,463 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-12 22:35:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:35:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-12 22:35:20,463 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-12 22:35:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-12 22:35:20,464 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-12 22:35:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-12 22:35:20,466 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-12 22:35:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-12 22:35:20,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-12 22:35:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-12 22:35:20,466 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-12 22:35:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:35:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:35:20,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:35:20,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:35:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:35:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-12 22:35:20,469 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-12 22:35:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:35:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 22:35:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:35:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:35:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:35:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-12 22:35:20,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-12 22:35:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~TO~VOID [2021-11-12 22:35:20,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~TO~VOID [2021-11-12 22:35:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-12 22:35:20,472 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-12 22:35:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 22:35:20,472 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 22:35:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 22:35:20,472 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 22:35:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-12 22:35:20,473 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-12 22:35:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-12 22:35:20,473 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-12 22:35:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-12 22:35:20,474 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-12 22:35:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 22:35:20,475 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 22:35:20,475 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-12 22:35:20,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-12 22:35:20,475 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_ioctl [2021-11-12 22:35:20,476 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_ioctl [2021-11-12 22:35:20,476 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-12 22:35:20,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-12 22:35:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-12 22:35:20,478 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-12 22:35:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:35:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:35:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:35:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:35:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-12 22:35:20,479 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-12 22:35:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 22:35:20,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 22:35:20,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 22:35:20,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 22:35:20,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:35:20,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 22:35:20,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 22:35:20,481 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-12 22:35:20,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-12 22:35:20,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:35:20,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:35:20,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:35:20,486 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-12 22:35:20,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-12 22:35:20,486 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_stats [2021-11-12 22:35:20,486 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_stats [2021-11-12 22:35:20,486 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2021-11-12 22:35:20,489 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2021-11-12 22:35:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:35:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-12 22:35:20,490 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-12 22:35:20,495 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_tx_timeout [2021-11-12 22:35:20,496 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_tx_timeout [2021-11-12 22:35:20,496 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-12 22:35:20,496 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-12 22:35:20,496 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-12 22:35:20,497 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-12 22:35:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-12 22:35:20,497 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-12 22:35:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-12 22:35:20,497 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-12 22:35:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:35:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-12 22:35:20,498 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-12 22:35:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-12 22:35:20,498 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-12 22:35:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-12 22:35:20,498 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-12 22:35:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-12 22:35:20,499 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-12 22:35:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:35:20,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:35:26,091 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 22:35:44,857 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:35:44,858 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:35:44,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:44 BoogieIcfgContainer [2021-11-12 22:35:44,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:35:44,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:35:44,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:35:44,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:35:44,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:35:15" (1/3) ... [2021-11-12 22:35:44,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664fa54a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:44, skipping insertion in model container [2021-11-12 22:35:44,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:19" (2/3) ... [2021-11-12 22:35:44,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664fa54a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:44, skipping insertion in model container [2021-11-12 22:35:44,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:44" (3/3) ... [2021-11-12 22:35:44,872 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-12 22:35:44,878 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:35:44,878 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:35:44,949 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:35:44,957 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:35:44,957 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:35:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 1175 states, 832 states have (on average 1.3353365384615385) internal successors, (1111), 860 states have internal predecessors, (1111), 285 states have call successors, (285), 57 states have call predecessors, (285), 56 states have return successors, (277), 267 states have call predecessors, (277), 277 states have call successors, (277) [2021-11-12 22:35:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-12 22:35:45,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:45,039 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:35:45,040 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 112166995, now seen corresponding path program 1 times [2021-11-12 22:35:45,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:45,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784686080] [2021-11-12 22:35:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:45,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:45,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:45,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:45,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:35:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:35:47,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 22:35:48,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-12 22:35:48,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:48,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784686080] [2021-11-12 22:35:48,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784686080] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:35:48,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:35:48,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 22:35:48,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287576854] [2021-11-12 22:35:48,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:48,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:35:48,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:48,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:35:48,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:35:48,796 INFO L87 Difference]: Start difference. First operand has 1175 states, 832 states have (on average 1.3353365384615385) internal successors, (1111), 860 states have internal predecessors, (1111), 285 states have call successors, (285), 57 states have call predecessors, (285), 56 states have return successors, (277), 267 states have call predecessors, (277), 277 states have call successors, (277) Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:35:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:49,029 INFO L93 Difference]: Finished difference Result 2345 states and 3373 transitions. [2021-11-12 22:35:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:35:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 162 [2021-11-12 22:35:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:49,071 INFO L225 Difference]: With dead ends: 2345 [2021-11-12 22:35:49,071 INFO L226 Difference]: Without dead ends: 1152 [2021-11-12 22:35:49,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:35:49,098 INFO L933 BasicCegarLoop]: 1669 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:49,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 23.27ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:35:49,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-11-12 22:35:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2021-11-12 22:35:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 819 states have (on average 1.321123321123321) internal successors, (1082), 837 states have internal predecessors, (1082), 277 states have call successors, (277), 56 states have call predecessors, (277), 55 states have return successors, (276), 266 states have call predecessors, (276), 276 states have call successors, (276) [2021-11-12 22:35:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1635 transitions. [2021-11-12 22:35:49,307 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1635 transitions. Word has length 162 [2021-11-12 22:35:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:49,307 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1635 transitions. [2021-11-12 22:35:49,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:35:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1635 transitions. [2021-11-12 22:35:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-12 22:35:49,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:49,334 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:35:49,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 22:35:49,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:49,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1911491745, now seen corresponding path program 1 times [2021-11-12 22:35:49,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:49,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92281634] [2021-11-12 22:35:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:49,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:49,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:49,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:49,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:35:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:51,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:35:51,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-11-12 22:35:52,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-12 22:35:53,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:53,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92281634] [2021-11-12 22:35:53,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92281634] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:35:53,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:35:53,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 22:35:53,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659883565] [2021-11-12 22:35:53,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:53,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:35:53,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:53,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:35:53,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:35:53,467 INFO L87 Difference]: Start difference. First operand 1152 states and 1635 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:35:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:53,812 INFO L93 Difference]: Finished difference Result 2294 states and 3256 transitions. [2021-11-12 22:35:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:35:53,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 162 [2021-11-12 22:35:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:53,826 INFO L225 Difference]: With dead ends: 2294 [2021-11-12 22:35:53,826 INFO L226 Difference]: Without dead ends: 1153 [2021-11-12 22:35:53,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:35:53,906 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 6 mSDsluCounter, 6509 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8139 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.09ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:53,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8139 Invalid, 33 Unknown, 0 Unchecked, 28.09ms Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 152.21ms Time] [2021-11-12 22:35:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-11-12 22:35:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1153. [2021-11-12 22:35:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 820 states have (on average 1.3207317073170732) internal successors, (1083), 838 states have internal predecessors, (1083), 277 states have call successors, (277), 56 states have call predecessors, (277), 55 states have return successors, (276), 266 states have call predecessors, (276), 276 states have call successors, (276) [2021-11-12 22:35:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1636 transitions. [2021-11-12 22:35:53,989 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1636 transitions. Word has length 162 [2021-11-12 22:35:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:53,995 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1636 transitions. [2021-11-12 22:35:53,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:35:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1636 transitions. [2021-11-12 22:35:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-12 22:35:54,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:54,003 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:35:54,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:54,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:54,219 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1531313879, now seen corresponding path program 1 times [2021-11-12 22:35:54,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:54,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895896672] [2021-11-12 22:35:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:54,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:54,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:54,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:54,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:35:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:56,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1700 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:35:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-12 22:35:57,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:35:58,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:58,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895896672] [2021-11-12 22:35:58,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895896672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:58,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1400064198] [2021-11-12 22:35:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:58,401 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:35:58,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:35:58,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 22:35:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:59,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1700 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:35:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:35:59,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:36:00,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1400064198] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:00,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:36:00,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 22:36:00,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552938608] [2021-11-12 22:36:00,414 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:00,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:36:00,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:00,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:36:00,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:36:00,416 INFO L87 Difference]: Start difference. First operand 1153 states and 1636 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:36:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:00,983 INFO L93 Difference]: Finished difference Result 2961 states and 4155 transitions. [2021-11-12 22:36:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:36:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 164 [2021-11-12 22:36:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:01,004 INFO L225 Difference]: With dead ends: 2961 [2021-11-12 22:36:01,004 INFO L226 Difference]: Without dead ends: 1832 [2021-11-12 22:36:01,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:36:01,054 INFO L933 BasicCegarLoop]: 1764 mSDtfsCounter, 948 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 351.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 3276 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.55ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 436.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:01,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 3276 Invalid, 85 Unknown, 0 Unchecked, 18.55ms Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 436.65ms Time] [2021-11-12 22:36:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-11-12 22:36:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1800. [2021-11-12 22:36:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1294 states have (on average 1.3083462132921175) internal successors, (1693), 1321 states have internal predecessors, (1693), 407 states have call successors, (407), 99 states have call predecessors, (407), 98 states have return successors, (406), 392 states have call predecessors, (406), 406 states have call successors, (406) [2021-11-12 22:36:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2506 transitions. [2021-11-12 22:36:01,192 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2506 transitions. Word has length 164 [2021-11-12 22:36:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:01,193 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2506 transitions. [2021-11-12 22:36:01,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:36:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2506 transitions. [2021-11-12 22:36:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 22:36:01,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:01,201 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:36:01,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:01,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:01,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:01,613 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash 68504577, now seen corresponding path program 1 times [2021-11-12 22:36:01,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:01,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324584592] [2021-11-12 22:36:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:01,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:01,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:01,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:01,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:36:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:04,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:36:04,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-12 22:36:04,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:36:05,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:05,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324584592] [2021-11-12 22:36:05,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324584592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:05,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189098142] [2021-11-12 22:36:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:05,512 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:05,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:05,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:05,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 22:36:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:06,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:06,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:36:07,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:36:07,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1189098142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:07,941 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:36:07,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-12 22:36:07,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106462265] [2021-11-12 22:36:07,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:07,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:07,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:07,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:36:07,944 INFO L87 Difference]: Start difference. First operand 1800 states and 2506 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 22:36:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:08,434 INFO L93 Difference]: Finished difference Result 5364 states and 7478 transitions. [2021-11-12 22:36:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:36:08,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 177 [2021-11-12 22:36:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:08,466 INFO L225 Difference]: With dead ends: 5364 [2021-11-12 22:36:08,466 INFO L226 Difference]: Without dead ends: 3593 [2021-11-12 22:36:08,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 692 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:36:08,478 INFO L933 BasicCegarLoop]: 1995 mSDtfsCounter, 1583 mSDsluCounter, 5575 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 7570 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.08ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:08,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1587 Valid, 7570 Invalid, 34 Unknown, 0 Unchecked, 27.08ms Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 101.07ms Time] [2021-11-12 22:36:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-11-12 22:36:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3578. [2021-11-12 22:36:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 2577 states have (on average 1.308498253783469) internal successors, (3372), 2631 states have internal predecessors, (3372), 804 states have call successors, (804), 197 states have call predecessors, (804), 196 states have return successors, (803), 775 states have call predecessors, (803), 803 states have call successors, (803) [2021-11-12 22:36:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 4979 transitions. [2021-11-12 22:36:08,695 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 4979 transitions. Word has length 177 [2021-11-12 22:36:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:08,695 INFO L470 AbstractCegarLoop]: Abstraction has 3578 states and 4979 transitions. [2021-11-12 22:36:08,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 22:36:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 4979 transitions. [2021-11-12 22:36:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-12 22:36:08,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:08,701 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:36:08,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:08,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:09,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:09,120 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1192288910, now seen corresponding path program 1 times [2021-11-12 22:36:09,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:09,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238619556] [2021-11-12 22:36:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:09,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:09,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:09,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:36:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:11,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:36:11,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-12 22:36:11,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:36:12,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:12,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238619556] [2021-11-12 22:36:12,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238619556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:12,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551067176] [2021-11-12 22:36:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:12,808 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:12,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:12,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:12,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 22:36:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:13,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:36:14,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:36:15,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551067176] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:15,361 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:36:15,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-12 22:36:15,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515054608] [2021-11-12 22:36:15,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:15,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:15,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:36:15,363 INFO L87 Difference]: Start difference. First operand 3578 states and 4979 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 22:36:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:15,980 INFO L93 Difference]: Finished difference Result 10718 states and 14924 transitions. [2021-11-12 22:36:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:36:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 176 [2021-11-12 22:36:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:16,048 INFO L225 Difference]: With dead ends: 10718 [2021-11-12 22:36:16,049 INFO L226 Difference]: Without dead ends: 7169 [2021-11-12 22:36:16,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:36:16,075 INFO L933 BasicCegarLoop]: 1996 mSDtfsCounter, 1582 mSDsluCounter, 5577 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 7573 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.56ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:16,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 7573 Invalid, 34 Unknown, 0 Unchecked, 37.56ms Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 101.61ms Time] [2021-11-12 22:36:16,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7169 states. [2021-11-12 22:36:16,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7169 to 7142. [2021-11-12 22:36:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 5149 states have (on average 1.3076325500097106) internal successors, (6733), 5257 states have internal predecessors, (6733), 1598 states have call successors, (1598), 395 states have call predecessors, (1598), 394 states have return successors, (1597), 1541 states have call predecessors, (1597), 1597 states have call successors, (1597) [2021-11-12 22:36:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 9928 transitions. [2021-11-12 22:36:16,697 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 9928 transitions. Word has length 176 [2021-11-12 22:36:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:16,699 INFO L470 AbstractCegarLoop]: Abstraction has 7142 states and 9928 transitions. [2021-11-12 22:36:16,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 22:36:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 9928 transitions. [2021-11-12 22:36:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-12 22:36:16,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:16,705 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:36:16,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:16,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:17,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:17,132 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1791588644, now seen corresponding path program 1 times [2021-11-12 22:36:17,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:17,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691095411] [2021-11-12 22:36:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:17,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:17,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:17,136 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:17,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:36:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:36:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-12 22:36:19,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:36:20,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:20,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691095411] [2021-11-12 22:36:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691095411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:20,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2106161924] [2021-11-12 22:36:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:20,774 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:20,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:20,778 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:20,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:36:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:21,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:36:22,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:36:23,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2106161924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:23,252 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:36:23,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-12 22:36:23,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414197158] [2021-11-12 22:36:23,252 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:23,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:23,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:36:23,254 INFO L87 Difference]: Start difference. First operand 7142 states and 9928 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 22:36:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:24,219 INFO L93 Difference]: Finished difference Result 21450 states and 29821 transitions. [2021-11-12 22:36:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:36:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 175 [2021-11-12 22:36:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:24,370 INFO L225 Difference]: With dead ends: 21450 [2021-11-12 22:36:24,371 INFO L226 Difference]: Without dead ends: 14337 [2021-11-12 22:36:24,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:36:24,421 INFO L933 BasicCegarLoop]: 1997 mSDtfsCounter, 1581 mSDsluCounter, 5579 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 7576 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.78ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:24,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 7576 Invalid, 34 Unknown, 0 Unchecked, 34.78ms Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 99.19ms Time] [2021-11-12 22:36:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14337 states. [2021-11-12 22:36:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14337 to 14286. [2021-11-12 22:36:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14286 states, 10305 states have (on average 1.306259097525473) internal successors, (13461), 10521 states have internal predecessors, (13461), 3186 states have call successors, (3186), 795 states have call predecessors, (3186), 794 states have return successors, (3185), 3073 states have call predecessors, (3185), 3185 states have call successors, (3185) [2021-11-12 22:36:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14286 states to 14286 states and 19832 transitions. [2021-11-12 22:36:25,333 INFO L78 Accepts]: Start accepts. Automaton has 14286 states and 19832 transitions. Word has length 175 [2021-11-12 22:36:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:25,334 INFO L470 AbstractCegarLoop]: Abstraction has 14286 states and 19832 transitions. [2021-11-12 22:36:25,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 22:36:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 14286 states and 19832 transitions. [2021-11-12 22:36:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 22:36:25,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:25,340 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:36:25,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:25,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:25,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:25,763 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:25,764 INFO L85 PathProgramCache]: Analyzing trace with hash -768049547, now seen corresponding path program 1 times [2021-11-12 22:36:25,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:25,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097305205] [2021-11-12 22:36:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:25,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:25,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:25,768 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:25,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:36:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:27,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:36:27,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-12 22:36:28,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:36:29,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:29,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097305205] [2021-11-12 22:36:29,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097305205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:29,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [385214323] [2021-11-12 22:36:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:29,290 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:29,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:29,291 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:29,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:36:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:30,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:36:31,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:36:31,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [385214323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:31,587 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:36:31,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-12 22:36:31,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716761132] [2021-11-12 22:36:31,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:31,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:31,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:36:31,589 INFO L87 Difference]: Start difference. First operand 14286 states and 19832 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 22:36:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:32,826 INFO L93 Difference]: Finished difference Result 42428 states and 58885 transitions. [2021-11-12 22:36:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:36:32,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 174 [2021-11-12 22:36:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:32,972 INFO L225 Difference]: With dead ends: 42428 [2021-11-12 22:36:32,972 INFO L226 Difference]: Without dead ends: 28171 [2021-11-12 22:36:33,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:36:33,042 INFO L933 BasicCegarLoop]: 2365 mSDtfsCounter, 1582 mSDsluCounter, 6314 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 8679 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.32ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:33,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 8679 Invalid, 42 Unknown, 0 Unchecked, 23.32ms Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 127.03ms Time] [2021-11-12 22:36:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28171 states. [2021-11-12 22:36:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28171 to 27870. [2021-11-12 22:36:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27870 states, 20085 states have (on average 1.3069952701020662) internal successors, (26251), 20549 states have internal predecessors, (26251), 6229 states have call successors, (6229), 1556 states have call predecessors, (6229), 1555 states have return successors, (6228), 5968 states have call predecessors, (6228), 6228 states have call successors, (6228) [2021-11-12 22:36:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27870 states to 27870 states and 38708 transitions. [2021-11-12 22:36:34,830 INFO L78 Accepts]: Start accepts. Automaton has 27870 states and 38708 transitions. Word has length 174 [2021-11-12 22:36:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:34,831 INFO L470 AbstractCegarLoop]: Abstraction has 27870 states and 38708 transitions. [2021-11-12 22:36:34,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 22:36:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 27870 states and 38708 transitions. [2021-11-12 22:36:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 22:36:34,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:34,837 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:36:34,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:35,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:35,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:35,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:35,249 INFO L85 PathProgramCache]: Analyzing trace with hash 946240290, now seen corresponding path program 1 times [2021-11-12 22:36:35,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:35,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821873737] [2021-11-12 22:36:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:35,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:35,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:35,254 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:35,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:36:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:38,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:36:38,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-12 22:36:38,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-12 22:36:39,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:39,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821873737] [2021-11-12 22:36:39,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821873737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:39,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [133942096] [2021-11-12 22:36:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:39,545 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:39,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:39,546 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:39,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:36:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:36:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-12 22:36:41,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-12 22:36:42,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [133942096] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:36:42,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:36:42,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7] total 19 [2021-11-12 22:36:42,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305484631] [2021-11-12 22:36:42,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:42,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:36:42,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:36:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:36:42,525 INFO L87 Difference]: Start difference. First operand 27870 states and 38708 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:36:44,737 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:36:46,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:36:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:58,497 INFO L93 Difference]: Finished difference Result 75806 states and 106365 transitions. [2021-11-12 22:36:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:36:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 188 [2021-11-12 22:36:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:58,750 INFO L225 Difference]: With dead ends: 75806 [2021-11-12 22:36:58,750 INFO L226 Difference]: Without dead ends: 47965 [2021-11-12 22:36:58,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 731 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:36:58,833 INFO L933 BasicCegarLoop]: 3084 mSDtfsCounter, 3086 mSDsluCounter, 11377 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 529 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12243.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3093 SdHoareTripleChecker+Valid, 14461 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 69.27ms SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13236.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:58,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3093 Valid, 14461 Invalid, 3047 Unknown, 0 Unchecked, 69.27ms Time], IncrementalHoareTripleChecker [529 Valid, 2516 Invalid, 2 Unknown, 0 Unchecked, 13236.36ms Time] [2021-11-12 22:36:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47965 states. [2021-11-12 22:37:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47965 to 41366. [2021-11-12 22:37:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41366 states, 29809 states have (on average 1.3078264953537522) internal successors, (38985), 30489 states have internal predecessors, (38985), 9256 states have call successors, (9256), 2301 states have call predecessors, (9256), 2300 states have return successors, (9255), 8879 states have call predecessors, (9255), 9255 states have call successors, (9255) [2021-11-12 22:37:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41366 states to 41366 states and 57496 transitions. [2021-11-12 22:37:01,682 INFO L78 Accepts]: Start accepts. Automaton has 41366 states and 57496 transitions. Word has length 188 [2021-11-12 22:37:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:01,683 INFO L470 AbstractCegarLoop]: Abstraction has 41366 states and 57496 transitions. [2021-11-12 22:37:01,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:37:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 41366 states and 57496 transitions. [2021-11-12 22:37:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-12 22:37:01,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:01,692 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:37:01,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:01,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-12 22:37:02,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:02,115 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1485401942, now seen corresponding path program 1 times [2021-11-12 22:37:02,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:37:02,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895639054] [2021-11-12 22:37:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:02,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:37:02,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:37:02,119 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:37:02,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:37:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:37:04,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-12 22:37:04,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-12 22:37:05,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:37:05,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895639054] [2021-11-12 22:37:05,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895639054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:05,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1258934455] [2021-11-12 22:37:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:05,775 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:05,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:37:05,776 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:37:05,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:37:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:06,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:37:06,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:37:08,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:37:09,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1258934455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:09,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482226502] [2021-11-12 22:37:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:09,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:37:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:37:09,039 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:37:09,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:37:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:10,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:37:10,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:37:11,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:37:11,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482226502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:11,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:37:11,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 9, 8, 9] total 20 [2021-11-12 22:37:11,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540363048] [2021-11-12 22:37:11,991 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:37:11,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:37:11,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:37:11,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:37:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:37:11,994 INFO L87 Difference]: Start difference. First operand 41366 states and 57496 transitions. Second operand has 20 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-12 22:37:14,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:37:16,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:37:18,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:37:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:50,445 INFO L93 Difference]: Finished difference Result 89787 states and 124679 transitions. [2021-11-12 22:37:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-12 22:37:50,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) Word has length 189 [2021-11-12 22:37:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:50,882 INFO L225 Difference]: With dead ends: 89787 [2021-11-12 22:37:50,884 INFO L226 Difference]: Without dead ends: 48376 [2021-11-12 22:37:51,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1169 GetRequests, 1116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=364, Invalid=2606, Unknown=0, NotChecked=0, Total=2970 [2021-11-12 22:37:51,019 INFO L933 BasicCegarLoop]: 4166 mSDtfsCounter, 6491 mSDsluCounter, 46581 mSDsCounter, 0 mSdLazyCounter, 8598 mSolverCounterSat, 2206 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31067.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6498 SdHoareTripleChecker+Valid, 50747 SdHoareTripleChecker+Invalid, 10807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 217.16ms SdHoareTripleChecker+Time, 2206 IncrementalHoareTripleChecker+Valid, 8598 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33839.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:51,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6498 Valid, 50747 Invalid, 10807 Unknown, 0 Unchecked, 217.16ms Time], IncrementalHoareTripleChecker [2206 Valid, 8598 Invalid, 3 Unknown, 0 Unchecked, 33839.14ms Time] [2021-11-12 22:37:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48376 states. [2021-11-12 22:37:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48376 to 47919. [2021-11-12 22:37:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47919 states, 34530 states have (on average 1.307500724008109) internal successors, (45148), 35326 states have internal predecessors, (45148), 10719 states have call successors, (10719), 2670 states have call predecessors, (10719), 2669 states have return successors, (10726), 10274 states have call predecessors, (10726), 10718 states have call successors, (10726) [2021-11-12 22:37:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47919 states to 47919 states and 66593 transitions. [2021-11-12 22:37:53,730 INFO L78 Accepts]: Start accepts. Automaton has 47919 states and 66593 transitions. Word has length 189 [2021-11-12 22:37:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:53,731 INFO L470 AbstractCegarLoop]: Abstraction has 47919 states and 66593 transitions. [2021-11-12 22:37:53,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-12 22:37:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 47919 states and 66593 transitions. [2021-11-12 22:37:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 22:37:53,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:53,741 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2021-11-12 22:37:53,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:53,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:54,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:54,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:37:54,368 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1560386145, now seen corresponding path program 1 times [2021-11-12 22:37:54,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:37:54,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946631781] [2021-11-12 22:37:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:54,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:37:54,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:37:54,373 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:37:54,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:37:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:56,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:37:56,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-12 22:37:57,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-12 22:37:58,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:37:58,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946631781] [2021-11-12 22:37:58,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946631781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:58,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1629192611] [2021-11-12 22:37:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:58,782 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:58,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:37:58,783 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:37:58,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:37:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:59,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:37:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-12 22:38:01,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-12 22:38:01,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1629192611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:38:01,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426337607] [2021-11-12 22:38:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:01,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:38:01,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:38:01,862 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:38:01,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 22:38:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:02,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:38:03,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-12 22:38:03,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-12 22:38:04,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426337607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:38:04,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:38:04,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 9, 8, 9] total 22 [2021-11-12 22:38:04,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395522540] [2021-11-12 22:38:04,600 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:38:04,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 22:38:04,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 22:38:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:38:04,603 INFO L87 Difference]: Start difference. First operand 47919 states and 66593 transitions. Second operand has 22 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-12 22:38:06,863 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:38:08,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:38:10,876 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:38:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:45,205 INFO L93 Difference]: Finished difference Result 102909 states and 142893 transitions. [2021-11-12 22:38:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 22:38:45,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) Word has length 192 [2021-11-12 22:38:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:45,488 INFO L225 Difference]: With dead ends: 102909 [2021-11-12 22:38:45,488 INFO L226 Difference]: Without dead ends: 54937 [2021-11-12 22:38:45,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=401, Invalid=3139, Unknown=0, NotChecked=0, Total=3540 [2021-11-12 22:38:45,610 INFO L933 BasicCegarLoop]: 3993 mSDtfsCounter, 6624 mSDsluCounter, 48543 mSDsCounter, 0 mSdLazyCounter, 9180 mSolverCounterSat, 2265 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32122.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6631 SdHoareTripleChecker+Valid, 52536 SdHoareTripleChecker+Invalid, 11448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 191.45ms SdHoareTripleChecker+Time, 2265 IncrementalHoareTripleChecker+Valid, 9180 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35123.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:45,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6631 Valid, 52536 Invalid, 11448 Unknown, 0 Unchecked, 191.45ms Time], IncrementalHoareTripleChecker [2265 Valid, 9180 Invalid, 3 Unknown, 0 Unchecked, 35123.10ms Time] [2021-11-12 22:38:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54937 states. [2021-11-12 22:38:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54937 to 51476. [2021-11-12 22:38:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51476 states, 37103 states have (on average 1.3072797347923348) internal successors, (48504), 37963 states have internal predecessors, (48504), 11507 states have call successors, (11507), 2866 states have call predecessors, (11507), 2865 states have return successors, (11520), 11024 states have call predecessors, (11520), 11506 states have call successors, (11520) [2021-11-12 22:38:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51476 states to 51476 states and 71531 transitions. [2021-11-12 22:38:48,478 INFO L78 Accepts]: Start accepts. Automaton has 51476 states and 71531 transitions. Word has length 192 [2021-11-12 22:38:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:48,478 INFO L470 AbstractCegarLoop]: Abstraction has 51476 states and 71531 transitions. [2021-11-12 22:38:48,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-12 22:38:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 51476 states and 71531 transitions. [2021-11-12 22:38:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 22:38:48,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:48,487 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:38:48,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:48,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-12 22:38:48,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-12 22:38:49,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:38:49,099 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:49,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash 449035645, now seen corresponding path program 1 times [2021-11-12 22:38:49,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:49,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137943892] [2021-11-12 22:38:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:49,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:49,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:49,103 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:49,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:38:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:51,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1751 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:38:51,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:38:51,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-12 22:38:53,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:53,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137943892] [2021-11-12 22:38:53,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137943892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:38:53,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [449033202] [2021-11-12 22:38:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:53,393 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:38:53,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:38:53,394 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:38:53,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:38:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:54,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1751 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:38:54,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-12 22:38:55,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-12 22:38:56,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [449033202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:38:56,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87728047] [2021-11-12 22:38:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:56,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:38:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:38:56,588 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:38:56,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 22:38:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:58,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1751 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:38:58,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-12 22:38:58,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-12 22:38:59,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87728047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:38:59,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:38:59,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 9, 8, 9] total 24 [2021-11-12 22:38:59,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064606550] [2021-11-12 22:38:59,558 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:38:59,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 22:38:59,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 22:38:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:38:59,561 INFO L87 Difference]: Start difference. First operand 51476 states and 71531 transitions. Second operand has 24 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-12 22:39:01,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:03,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:05,836 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:44,444 INFO L93 Difference]: Finished difference Result 110033 states and 152781 transitions. [2021-11-12 22:39:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-12 22:39:44,446 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) Word has length 195 [2021-11-12 22:39:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:44,981 INFO L225 Difference]: With dead ends: 110033 [2021-11-12 22:39:44,981 INFO L226 Difference]: Without dead ends: 58500 [2021-11-12 22:39:45,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 1148 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=442, Invalid=3718, Unknown=0, NotChecked=0, Total=4160 [2021-11-12 22:39:45,141 INFO L933 BasicCegarLoop]: 4029 mSDtfsCounter, 6397 mSDsluCounter, 52535 mSDsCounter, 0 mSdLazyCounter, 10421 mSolverCounterSat, 2186 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35203.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6404 SdHoareTripleChecker+Valid, 56564 SdHoareTripleChecker+Invalid, 12610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 199.62ms SdHoareTripleChecker+Time, 2186 IncrementalHoareTripleChecker+Valid, 10421 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38523.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:45,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6404 Valid, 56564 Invalid, 12610 Unknown, 0 Unchecked, 199.62ms Time], IncrementalHoareTripleChecker [2186 Valid, 10421 Invalid, 3 Unknown, 0 Unchecked, 38523.53ms Time] [2021-11-12 22:39:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58500 states. [2021-11-12 22:39:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58500 to 53273. [2021-11-12 22:39:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53273 states, 38407 states have (on average 1.3070534017236441) internal successors, (50200), 39300 states have internal predecessors, (50200), 11902 states have call successors, (11902), 2964 states have call predecessors, (11902), 2963 states have return successors, (11919), 11399 states have call predecessors, (11919), 11901 states have call successors, (11919) [2021-11-12 22:39:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53273 states to 53273 states and 74021 transitions. [2021-11-12 22:39:47,984 INFO L78 Accepts]: Start accepts. Automaton has 53273 states and 74021 transitions. Word has length 195 [2021-11-12 22:39:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:47,985 INFO L470 AbstractCegarLoop]: Abstraction has 53273 states and 74021 transitions. [2021-11-12 22:39:47,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-12 22:39:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 53273 states and 74021 transitions. [2021-11-12 22:39:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-12 22:39:47,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:47,993 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:39:48,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:48,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:48,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:48,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:39:48,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:48,605 INFO L85 PathProgramCache]: Analyzing trace with hash 423942989, now seen corresponding path program 1 times [2021-11-12 22:39:48,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:48,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618951629] [2021-11-12 22:39:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:48,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:48,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:48,609 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:48,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:39:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:51,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:39:51,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 22:39:52,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-12 22:39:53,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:53,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618951629] [2021-11-12 22:39:53,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618951629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:53,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [148970497] [2021-11-12 22:39:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:53,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:53,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:53,710 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:53,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:39:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:39:54,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 22:39:55,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-12 22:39:56,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [148970497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:56,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239129174] [2021-11-12 22:39:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:56,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:39:56,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:39:56,527 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:39:56,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 22:39:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:57,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:39:57,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 22:39:58,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-12 22:40:00,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239129174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:00,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:40:00,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 12, 11, 12] total 16 [2021-11-12 22:40:00,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393580810] [2021-11-12 22:40:00,069 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:40:00,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:40:00,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:00,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:40:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:40:00,072 INFO L87 Difference]: Start difference. First operand 53273 states and 74021 transitions. Second operand has 16 states, 16 states have (on average 7.0) internal successors, (112), 13 states have internal predecessors, (112), 4 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (34), 5 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-12 22:40:02,392 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:04,403 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:06,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:55,940 INFO L93 Difference]: Finished difference Result 174839 states and 247076 transitions. [2021-11-12 22:40:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-12 22:40:55,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.0) internal successors, (112), 13 states have internal predecessors, (112), 4 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (34), 5 states have call predecessors, (34), 4 states have call successors, (34) Word has length 209 [2021-11-12 22:40:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:56,801 INFO L225 Difference]: With dead ends: 174839 [2021-11-12 22:40:56,801 INFO L226 Difference]: Without dead ends: 121598 [2021-11-12 22:40:56,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1282 GetRequests, 1235 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=445, Invalid=1907, Unknown=0, NotChecked=0, Total=2352 [2021-11-12 22:40:56,999 INFO L933 BasicCegarLoop]: 5468 mSDtfsCounter, 11202 mSDsluCounter, 39665 mSDsCounter, 0 mSdLazyCounter, 13778 mSolverCounterSat, 4946 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42964.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11209 SdHoareTripleChecker+Valid, 45133 SdHoareTripleChecker+Invalid, 18727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 202.09ms SdHoareTripleChecker+Time, 4946 IncrementalHoareTripleChecker+Valid, 13778 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47003.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:57,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11209 Valid, 45133 Invalid, 18727 Unknown, 0 Unchecked, 202.09ms Time], IncrementalHoareTripleChecker [4946 Valid, 13778 Invalid, 3 Unknown, 0 Unchecked, 47003.53ms Time] [2021-11-12 22:40:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121598 states. [2021-11-12 22:41:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121598 to 60111. [2021-11-12 22:41:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60111 states, 43329 states have (on average 1.3055459392093056) internal successors, (56568), 44338 states have internal predecessors, (56568), 13403 states have call successors, (13403), 3363 states have call predecessors, (13403), 3378 states have return successors, (13484), 12848 states have call predecessors, (13484), 13402 states have call successors, (13484) [2021-11-12 22:41:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60111 states to 60111 states and 83455 transitions. [2021-11-12 22:41:01,793 INFO L78 Accepts]: Start accepts. Automaton has 60111 states and 83455 transitions. Word has length 209 [2021-11-12 22:41:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:01,793 INFO L470 AbstractCegarLoop]: Abstraction has 60111 states and 83455 transitions. [2021-11-12 22:41:01,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0) internal successors, (112), 13 states have internal predecessors, (112), 4 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (34), 5 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-12 22:41:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 60111 states and 83455 transitions. [2021-11-12 22:41:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-11-12 22:41:01,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:01,806 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:01,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:02,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:02,473 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forcibly destroying the process [2021-11-12 22:41:02,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:02,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:02,474 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:02,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:02,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1135866454, now seen corresponding path program 1 times [2021-11-12 22:41:02,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:02,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964479636] [2021-11-12 22:41:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:02,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:02,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:02,483 WARN L724 oredProcess$PipePump]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] The stream was forcibly closed: stdIn [2021-11-12 22:41:02,484 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:02,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb37be2d-52a5-40f8-8e93-9bbda90c7b81/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:41:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 2280 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:41:05,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-12 22:41:06,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2021-11-12 22:41:07,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:07,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964479636] [2021-11-12 22:41:07,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964479636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:07,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:07,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:41:07,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394887433] [2021-11-12 22:41:07,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:07,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:41:07,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:07,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:41:07,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:41:07,142 INFO L87 Difference]: Start difference. First operand 60111 states and 83455 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-12 22:41:12,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:12,298 INFO L93 Difference]: Finished difference Result 166919 states and 231762 transitions. [2021-11-12 22:41:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:41:12,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 344 [2021-11-12 22:41:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:12,763 INFO L225 Difference]: With dead ends: 166919 [2021-11-12 22:41:12,764 INFO L226 Difference]: Without dead ends: 106840 [2021-11-12 22:41:12,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:41:12,926 INFO L933 BasicCegarLoop]: 2618 mSDtfsCounter, 1308 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 4209 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 155.63ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 227.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:12,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1308 Valid, 4209 Invalid, 14 Unknown, 0 Unchecked, 155.63ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 227.27ms Time] [2021-11-12 22:41:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106840 states.