./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:38:00,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:38:00,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:38:00,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:38:00,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:38:00,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:38:00,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:38:00,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:38:00,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:38:00,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:38:00,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:38:00,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:38:00,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:38:00,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:38:00,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:38:00,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:38:00,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:38:00,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:38:00,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:38:00,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:38:00,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:38:00,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:38:00,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:38:00,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:38:00,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:38:00,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:38:00,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:38:00,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:38:00,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:38:00,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:38:01,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:38:01,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:38:01,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:38:01,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:38:01,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:38:01,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:38:01,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:38:01,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:38:01,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:38:01,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:38:01,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:38:01,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:38:01,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:38:01,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:38:01,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:38:01,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:38:01,065 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:38:01,065 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:38:01,066 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:38:01,066 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:38:01,066 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:38:01,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:38:01,066 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:38:01,067 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:38:01,067 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:38:01,067 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:38:01,067 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:38:01,067 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:38:01,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:38:01,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:38:01,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:38:01,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:38:01,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:38:01,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:38:01,069 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:38:01,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:38:01,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:38:01,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:38:01,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:38:01,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:38:01,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:38:01,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:38:01,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:38:01,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:38:01,071 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:38:01,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:38:01,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:38:01,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:38:01,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:38:01,072 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_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 [2021-11-19 14:38:01,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:38:01,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:38:01,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:38:01,354 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:38:01,354 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:38:01,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 14:38:01,426 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data/2cdc0b967/1881c8c11f7d4934a1361a4b152217ba/FLAG738c817b5 [2021-11-19 14:38:02,348 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:38:02,349 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 14:38:02,405 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data/2cdc0b967/1881c8c11f7d4934a1361a4b152217ba/FLAG738c817b5 [2021-11-19 14:38:02,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data/2cdc0b967/1881c8c11f7d4934a1361a4b152217ba [2021-11-19 14:38:02,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:38:02,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:38:02,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:38:02,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:38:02,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:38:02,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:38:02" (1/1) ... [2021-11-19 14:38:02,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e116b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:02, skipping insertion in model container [2021-11-19 14:38:02,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:38:02" (1/1) ... [2021-11-19 14:38:02,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:38:02,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:38:03,429 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-19 14:38:03,432 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-19 14:38:03,916 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-19 14:38:04,209 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,247 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,436 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,503 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,504 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,510 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,511 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,520 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,521 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,531 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,531 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,590 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,614 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,619 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,632 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,639 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,648 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,661 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,668 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,673 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,679 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,696 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,703 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,712 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,721 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,727 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,732 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,737 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,742 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,753 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,759 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,807 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,813 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,852 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,852 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,881 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,918 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,949 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,954 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,955 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:04,959 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,001 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,002 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,002 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,003 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,008 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,008 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,009 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,009 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,009 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,010 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,010 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,011 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,011 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,011 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:38:05,059 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:38:05,117 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:38:05,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@242932e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:05, skipping insertion in model container [2021-11-19 14:38:05,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:38:05,118 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:38:05,120 INFO L158 Benchmark]: Toolchain (without parser) took 2299.58ms. Allocated memory is still 100.7MB. Free memory was 63.9MB in the beginning and 46.7MB in the end (delta: 17.2MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. [2021-11-19 14:38:05,121 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory is still 44.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:38:05,122 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2294.93ms. Allocated memory is still 100.7MB. Free memory was 63.6MB in the beginning and 46.7MB in the end (delta: 16.9MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. [2021-11-19 14:38:05,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory is still 44.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2294.93ms. Allocated memory is still 100.7MB. Free memory was 63.6MB in the beginning and 46.7MB in the end (delta: 16.9MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4052]: 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_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:38:07,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:38:07,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:38:07,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:38:07,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:38:07,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:38:07,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:38:07,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:38:07,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:38:07,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:38:07,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:38:07,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:38:07,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:38:07,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:38:07,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:38:07,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:38:07,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:38:07,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:38:07,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:38:07,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:38:07,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:38:07,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:38:07,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:38:07,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:38:07,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:38:07,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:38:07,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:38:07,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:38:07,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:38:07,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:38:07,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:38:07,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:38:07,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:38:07,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:38:07,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:38:07,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:38:07,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:38:07,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:38:07,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:38:07,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:38:07,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:38:07,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:38:07,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:38:07,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:38:07,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:38:07,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:38:07,535 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:38:07,535 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:38:07,535 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:38:07,535 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:38:07,536 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:38:07,536 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:38:07,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:38:07,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:38:07,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:38:07,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:38:07,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:38:07,539 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:38:07,539 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:38:07,540 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:38:07,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:38:07,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:38:07,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:38:07,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:38:07,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:38:07,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:38:07,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:38:07,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:38:07,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:38:07,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:38:07,542 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:38:07,542 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:38:07,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:38:07,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:38:07,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:38:07,543 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_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 [2021-11-19 14:38:07,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:38:07,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:38:07,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:38:07,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:38:07,970 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:38:07,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 14:38:08,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data/4ab77ea96/14be4e537cb84acc9a9e76855f728abf/FLAGbcebba0e3 [2021-11-19 14:38:08,979 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:38:08,980 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 14:38:09,036 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data/4ab77ea96/14be4e537cb84acc9a9e76855f728abf/FLAGbcebba0e3 [2021-11-19 14:38:09,404 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/data/4ab77ea96/14be4e537cb84acc9a9e76855f728abf [2021-11-19 14:38:09,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:38:09,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:38:09,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:38:09,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:38:09,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:38:09,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:38:09" (1/1) ... [2021-11-19 14:38:09,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8854671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:09, skipping insertion in model container [2021-11-19 14:38:09,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:38:09" (1/1) ... [2021-11-19 14:38:09,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:38:09,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:38:10,081 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-19 14:38:10,082 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-19 14:38:10,609 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-19 14:38:11,708 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:38:11,783 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:38:11,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:38:11,944 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-19 14:38:11,945 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-19 14:38:11,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-19 14:38:12,154 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:38:12,189 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:38:12,281 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-19 14:38:12,281 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-19 14:38:12,292 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-19 14:38:12,531 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:38:12,866 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:38:12,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12 WrapperNode [2021-11-19 14:38:12,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:38:12,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:38:12,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:38:12,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:38:12,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:12,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:13,231 INFO L137 Inliner]: procedures = 279, calls = 3505, calls flagged for inlining = 131, calls inlined = 111, statements flattened = 6158 [2021-11-19 14:38:13,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:38:13,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:38:13,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:38:13,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:38:13,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:13,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:13,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:13,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:13,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:13,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:13,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:13,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:38:13,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:38:13,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:38:13,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:38:13,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (1/1) ... [2021-11-19 14:38:13,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:38:13,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:38:13,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:38:13,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:38:13,763 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-19 14:38:13,764 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-19 14:38:13,764 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-19 14:38:13,764 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-19 14:38:13,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:38:13,764 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-19 14:38:13,764 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-19 14:38:13,765 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-19 14:38:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-19 14:38:13,765 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-19 14:38:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:38:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-19 14:38:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:38:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:38:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:38:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:38:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:38:13,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:38:13,826 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-19 14:38:13,827 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-19 14:38:13,827 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-19 14:38:13,827 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-19 14:38:13,827 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-19 14:38:13,827 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-19 14:38:13,827 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-19 14:38:13,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-19 14:38:13,827 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:38:13,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:38:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-19 14:38:13,828 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-19 14:38:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-19 14:38:13,828 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-19 14:38:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-19 14:38:13,828 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-19 14:38:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-19 14:38:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-19 14:38:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-19 14:38:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-19 14:38:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 14:38:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 14:38:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-19 14:38:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-19 14:38:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-19 14:38:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-19 14:38:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:38:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:38:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:38:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:38:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-19 14:38:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-19 14:38:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-19 14:38:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-19 14:38:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-19 14:38:13,832 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-19 14:38:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-19 14:38:13,832 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-19 14:38:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:38:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-19 14:38:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-19 14:38:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:38:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-19 14:38:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-19 14:38:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-19 14:38:13,834 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-19 14:38:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:38:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-19 14:38:13,834 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-19 14:38:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-19 14:38:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-19 14:38:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-19 14:38:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-19 14:38:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-19 14:38:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-19 14:38:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:38:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:38:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:38:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:38:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:38:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:38:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-19 14:38:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-19 14:38:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 14:38:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:38:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:38:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:38:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-19 14:38:13,838 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-19 14:38:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-19 14:38:13,838 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-19 14:38:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-19 14:38:13,838 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-19 14:38:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-19 14:38:13,839 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-19 14:38:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-19 14:38:13,839 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-19 14:38:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_from_anchor [2021-11-19 14:38:13,839 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_from_anchor [2021-11-19 14:38:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-19 14:38:13,840 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-19 14:38:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-19 14:38:13,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-19 14:38:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-19 14:38:13,840 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-19 14:38:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-19 14:38:13,841 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-19 14:38:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-19 14:38:13,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-19 14:38:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-19 14:38:13,841 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-19 14:38:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-19 14:38:13,842 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-19 14:38:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-19 14:38:13,842 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-19 14:38:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:38:13,842 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:38:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-19 14:38:13,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-19 14:38:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-19 14:38:13,843 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-19 14:38:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-19 14:38:13,843 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-19 14:38:13,844 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 14:38:13,844 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 14:38:13,844 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-19 14:38:13,844 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-19 14:38:13,844 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-19 14:38:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-19 14:38:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-19 14:38:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-19 14:38:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-19 14:38:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-19 14:38:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-19 14:38:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-19 14:38:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:38:13,846 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:38:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-19 14:38:13,846 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-19 14:38:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-19 14:38:13,846 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-19 14:38:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-19 14:38:13,847 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-19 14:38:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-19 14:38:13,847 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-19 14:38:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:38:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:38:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:38:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:38:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-19 14:38:13,848 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-19 14:38:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 14:38:13,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 14:38:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-19 14:38:13,849 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-19 14:38:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-19 14:38:13,849 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-19 14:38:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:38:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:38:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:38:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 14:38:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:38:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:38:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:38:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-19 14:38:13,850 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-19 14:38:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-19 14:38:13,851 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-19 14:38:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-19 14:38:13,851 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-19 14:38:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_dtr_rts [2021-11-19 14:38:13,851 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_dtr_rts [2021-11-19 14:38:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-19 14:38:13,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-19 14:38:13,852 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-19 14:38:13,852 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-19 14:38:13,852 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-19 14:38:13,852 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-19 14:38:13,852 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-19 14:38:13,853 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-19 14:38:13,853 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-19 14:38:13,853 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-19 14:38:13,853 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-19 14:38:13,853 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-19 14:38:13,853 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-19 14:38:13,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-19 14:38:13,854 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-19 14:38:13,854 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-19 14:38:13,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:38:13,854 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-19 14:38:13,854 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-19 14:38:13,854 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-19 14:38:13,855 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-19 14:38:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-19 14:38:13,855 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-19 14:38:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:38:13,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:38:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-19 14:38:13,856 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-19 14:38:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-19 14:38:13,856 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-19 14:38:14,622 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:38:14,626 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:38:15,060 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:38:59,432 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:38:59,451 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:38:59,451 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:38:59,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:38:59 BoogieIcfgContainer [2021-11-19 14:38:59,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:38:59,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:38:59,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:38:59,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:38:59,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:38:09" (1/3) ... [2021-11-19 14:38:59,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15753763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:38:59, skipping insertion in model container [2021-11-19 14:38:59,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:38:12" (2/3) ... [2021-11-19 14:38:59,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15753763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:38:59, skipping insertion in model container [2021-11-19 14:38:59,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:38:59" (3/3) ... [2021-11-19 14:38:59,464 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 14:38:59,470 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:38:59,470 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:38:59,528 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:38:59,535 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:38:59,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:38:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 1447 states, 1034 states have (on average 1.3375241779497098) internal successors, (1383), 1049 states have internal predecessors, (1383), 330 states have call successors, (330), 82 states have call predecessors, (330), 81 states have return successors, (322), 322 states have call predecessors, (322), 322 states have call successors, (322) [2021-11-19 14:38:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:38:59,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:59,612 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:59,613 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1676759204, now seen corresponding path program 1 times [2021-11-19 14:38:59,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:59,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705530661] [2021-11-19 14:38:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:59,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:59,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:59,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:59,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:39:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 3818 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:01,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 14:39:02,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 14:39:03,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:03,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705530661] [2021-11-19 14:39:03,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705530661] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:03,862 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:03,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:39:03,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449691070] [2021-11-19 14:39:03,870 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:03,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:39:03,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:03,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:39:03,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:03,918 INFO L87 Difference]: Start difference. First operand has 1447 states, 1034 states have (on average 1.3375241779497098) internal successors, (1383), 1049 states have internal predecessors, (1383), 330 states have call successors, (330), 82 states have call predecessors, (330), 81 states have return successors, (322), 322 states have call predecessors, (322), 322 states have call successors, (322) Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:39:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:04,638 INFO L93 Difference]: Finished difference Result 2898 states and 4152 transitions. [2021-11-19 14:39:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:39:04,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 130 [2021-11-19 14:39:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:04,665 INFO L225 Difference]: With dead ends: 2898 [2021-11-19 14:39:04,665 INFO L226 Difference]: Without dead ends: 1432 [2021-11-19 14:39:04,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:39:04,682 INFO L933 BasicCegarLoop]: 2027 mSDtfsCounter, 6 mSDsluCounter, 6070 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8097 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:04,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 8097 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:39:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-11-19 14:39:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1432. [2021-11-19 14:39:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1030 states have (on average 1.329126213592233) internal successors, (1369), 1035 states have internal predecessors, (1369), 320 states have call successors, (320), 82 states have call predecessors, (320), 81 states have return successors, (319), 319 states have call predecessors, (319), 319 states have call successors, (319) [2021-11-19 14:39:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2008 transitions. [2021-11-19 14:39:04,829 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2008 transitions. Word has length 130 [2021-11-19 14:39:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:04,830 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2008 transitions. [2021-11-19 14:39:04,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:39:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2008 transitions. [2021-11-19 14:39:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:39:04,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:04,841 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-19 14:39:04,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:05,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:05,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:05,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:05,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1101806108, now seen corresponding path program 1 times [2021-11-19 14:39:05,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:05,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284192024] [2021-11-19 14:39:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:05,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:05,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:05,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:05,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:39:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 3828 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:39:07,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 14:39:08,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 14:39:09,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:09,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284192024] [2021-11-19 14:39:09,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284192024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:39:09,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2012917689] [2021-11-19 14:39:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:09,719 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:39:09,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:39:09,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:39:09,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-19 14:39:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 3828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:39:11,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:39:12,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:39:12,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2012917689] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:12,550 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:39:12,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:39:12,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240792289] [2021-11-19 14:39:12,552 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:12,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:39:12,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:12,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:39:12,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:12,554 INFO L87 Difference]: Start difference. First operand 1432 states and 2008 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 14:39:15,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:16,164 INFO L93 Difference]: Finished difference Result 4094 states and 5726 transitions. [2021-11-19 14:39:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:39:16,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 132 [2021-11-19 14:39:16,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:16,186 INFO L225 Difference]: With dead ends: 4094 [2021-11-19 14:39:16,186 INFO L226 Difference]: Without dead ends: 2701 [2021-11-19 14:39:16,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:16,194 INFO L933 BasicCegarLoop]: 2273 mSDtfsCounter, 1802 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 4204 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:16,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1802 Valid, 4204 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:39:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-19 14:39:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2698. [2021-11-19 14:39:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 1948 states have (on average 1.3311088295687885) internal successors, (2593), 1958 states have internal predecessors, (2593), 589 states have call successors, (589), 161 states have call predecessors, (589), 160 states have return successors, (588), 588 states have call predecessors, (588), 588 states have call successors, (588) [2021-11-19 14:39:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 3770 transitions. [2021-11-19 14:39:16,417 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 3770 transitions. Word has length 132 [2021-11-19 14:39:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:16,418 INFO L470 AbstractCegarLoop]: Abstraction has 2698 states and 3770 transitions. [2021-11-19 14:39:16,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 14:39:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 3770 transitions. [2021-11-19 14:39:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:39:16,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:16,429 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-19 14:39:16,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:16,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:16,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:39:16,852 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:16,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2096693324, now seen corresponding path program 1 times [2021-11-19 14:39:16,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:16,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201703769] [2021-11-19 14:39:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:16,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:16,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:16,865 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:16,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:39:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 3850 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:39:18,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 14:39:19,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 14:39:21,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:21,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201703769] [2021-11-19 14:39:21,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201703769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:39:21,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1672464262] [2021-11-19 14:39:21,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:21,027 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:39:21,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:39:21,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:39:21,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-19 14:39:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 3850 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:39:22,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:39:23,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:39:23,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1672464262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:23,743 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:39:23,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:39:23,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348877240] [2021-11-19 14:39:23,744 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:23,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:39:23,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:39:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:23,746 INFO L87 Difference]: Start difference. First operand 2698 states and 3770 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, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:39:26,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:27,340 INFO L93 Difference]: Finished difference Result 7107 states and 9867 transitions. [2021-11-19 14:39:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:39:27,341 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, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 132 [2021-11-19 14:39:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:27,380 INFO L225 Difference]: With dead ends: 7107 [2021-11-19 14:39:27,380 INFO L226 Difference]: Without dead ends: 4448 [2021-11-19 14:39:27,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:27,396 INFO L933 BasicCegarLoop]: 2355 mSDtfsCounter, 1322 mSDsluCounter, 1868 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 4223 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:27,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 4223 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-19 14:39:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2021-11-19 14:39:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4443. [2021-11-19 14:39:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 3183 states have (on average 1.3166823751178134) internal successors, (4191), 3202 states have internal predecessors, (4191), 978 states have call successors, (978), 282 states have call predecessors, (978), 281 states have return successors, (977), 976 states have call predecessors, (977), 977 states have call successors, (977) [2021-11-19 14:39:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 6146 transitions. [2021-11-19 14:39:27,734 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 6146 transitions. Word has length 132 [2021-11-19 14:39:27,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:27,735 INFO L470 AbstractCegarLoop]: Abstraction has 4443 states and 6146 transitions. [2021-11-19 14:39:27,735 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, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:39:27,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 6146 transitions. [2021-11-19 14:39:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:39:27,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:27,739 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-19 14:39:27,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:28,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:28,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:28,173 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1259089564, now seen corresponding path program 1 times [2021-11-19 14:39:28,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:28,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666288237] [2021-11-19 14:39:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:28,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:28,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:28,182 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:28,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:39:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:30,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 3902 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:39:30,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 14:39:31,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 14:39:32,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:32,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666288237] [2021-11-19 14:39:32,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666288237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:39:32,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2052589178] [2021-11-19 14:39:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:32,909 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:39:32,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:39:32,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:39:32,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:39:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:34,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 3902 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:39:34,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:39:35,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:39:36,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2052589178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:36,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:39:36,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:39:36,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030555604] [2021-11-19 14:39:36,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:36,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:39:36,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:39:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:36,280 INFO L87 Difference]: Start difference. First operand 4443 states and 6146 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:39:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:38,201 INFO L93 Difference]: Finished difference Result 10742 states and 14830 transitions. [2021-11-19 14:39:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:39:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 136 [2021-11-19 14:39:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:38,270 INFO L225 Difference]: With dead ends: 10742 [2021-11-19 14:39:38,270 INFO L226 Difference]: Without dead ends: 6336 [2021-11-19 14:39:38,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:38,299 INFO L933 BasicCegarLoop]: 2178 mSDtfsCounter, 1160 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 4109 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:38,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1160 Valid, 4109 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:39:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-11-19 14:39:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 6329. [2021-11-19 14:39:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 4587 states have (on average 1.3250490516677567) internal successors, (6078), 4611 states have internal predecessors, (6078), 1325 states have call successors, (1325), 417 states have call predecessors, (1325), 416 states have return successors, (1324), 1322 states have call predecessors, (1324), 1324 states have call successors, (1324) [2021-11-19 14:39:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 8727 transitions. [2021-11-19 14:39:38,765 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 8727 transitions. Word has length 136 [2021-11-19 14:39:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:38,767 INFO L470 AbstractCegarLoop]: Abstraction has 6329 states and 8727 transitions. [2021-11-19 14:39:38,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:39:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 8727 transitions. [2021-11-19 14:39:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 14:39:38,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:38,782 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:38,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:39,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 14:39:39,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:39,203 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1036264898, now seen corresponding path program 1 times [2021-11-19 14:39:39,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:39,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263733609] [2021-11-19 14:39:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:39,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:39,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:39,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:39,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:39:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 3966 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:39:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-19 14:39:42,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-19 14:39:44,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:44,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263733609] [2021-11-19 14:39:44,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263733609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:39:44,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031762188] [2021-11-19 14:39:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:44,146 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:39:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:39:44,147 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:39:44,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 14:39:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:45,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 3966 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:39:45,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-19 14:39:49,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-19 14:39:51,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1031762188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:51,087 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:39:51,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:39:51,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986842858] [2021-11-19 14:39:51,088 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:51,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:39:51,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:51,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:39:51,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:51,090 INFO L87 Difference]: Start difference. First operand 6329 states and 8727 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-19 14:39:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:51,385 INFO L93 Difference]: Finished difference Result 6574 states and 8985 transitions. [2021-11-19 14:39:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:39:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 184 [2021-11-19 14:39:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:51,459 INFO L225 Difference]: With dead ends: 6574 [2021-11-19 14:39:51,460 INFO L226 Difference]: Without dead ends: 6571 [2021-11-19 14:39:51,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:51,465 INFO L933 BasicCegarLoop]: 2032 mSDtfsCounter, 1751 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:51,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1751 Valid, 2222 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:39:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6571 states. [2021-11-19 14:39:51,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6571 to 6571. [2021-11-19 14:39:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6571 states, 4750 states have (on average 1.3193684210526315) internal successors, (6267), 4774 states have internal predecessors, (6267), 1355 states have call successors, (1355), 466 states have call predecessors, (1355), 465 states have return successors, (1354), 1352 states have call predecessors, (1354), 1354 states have call successors, (1354) [2021-11-19 14:39:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6571 states to 6571 states and 8976 transitions. [2021-11-19 14:39:51,855 INFO L78 Accepts]: Start accepts. Automaton has 6571 states and 8976 transitions. Word has length 184 [2021-11-19 14:39:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:51,856 INFO L470 AbstractCegarLoop]: Abstraction has 6571 states and 8976 transitions. [2021-11-19 14:39:51,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-19 14:39:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6571 states and 8976 transitions. [2021-11-19 14:39:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 14:39:51,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:51,873 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 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] [2021-11-19 14:39:51,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:52,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:52,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:52,307 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash -41377682, now seen corresponding path program 1 times [2021-11-19 14:39:52,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:52,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725288373] [2021-11-19 14:39:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:52,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:52,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:52,318 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:52,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:39:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 3988 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:39:54,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-19 14:39:56,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-19 14:39:58,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:58,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725288373] [2021-11-19 14:39:58,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725288373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:39:58,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839059278] [2021-11-19 14:39:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:58,211 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:39:58,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:39:58,212 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:39:58,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 14:39:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:00,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 3988 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:40:00,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-19 14:40:01,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-11-19 14:40:03,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839059278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:03,074 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:40:03,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 14 [2021-11-19 14:40:03,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796339157] [2021-11-19 14:40:03,075 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:03,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:40:03,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:40:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:40:03,077 INFO L87 Difference]: Start difference. First operand 6571 states and 8976 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:40:05,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:06,195 INFO L93 Difference]: Finished difference Result 13120 states and 17920 transitions. [2021-11-19 14:40:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:40:06,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 184 [2021-11-19 14:40:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:06,270 INFO L225 Difference]: With dead ends: 13120 [2021-11-19 14:40:06,270 INFO L226 Difference]: Without dead ends: 6565 [2021-11-19 14:40:06,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:40:06,303 INFO L933 BasicCegarLoop]: 1998 mSDtfsCounter, 4 mSDsluCounter, 5983 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7981 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:06,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 7981 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 14:40:06,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6565 states. [2021-11-19 14:40:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6565 to 6515. [2021-11-19 14:40:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6515 states, 4708 states have (on average 1.31839422259983) internal successors, (6207), 4734 states have internal predecessors, (6207), 1347 states have call successors, (1347), 460 states have call predecessors, (1347), 459 states have return successors, (1346), 1342 states have call predecessors, (1346), 1346 states have call successors, (1346) [2021-11-19 14:40:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6515 states to 6515 states and 8900 transitions. [2021-11-19 14:40:06,694 INFO L78 Accepts]: Start accepts. Automaton has 6515 states and 8900 transitions. Word has length 184 [2021-11-19 14:40:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:06,695 INFO L470 AbstractCegarLoop]: Abstraction has 6515 states and 8900 transitions. [2021-11-19 14:40:06,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:40:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6515 states and 8900 transitions. [2021-11-19 14:40:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 14:40:06,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:06,714 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 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] [2021-11-19 14:40:06,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:06,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:07,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:07,132 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:07,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1217390188, now seen corresponding path program 1 times [2021-11-19 14:40:07,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:07,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769015457] [2021-11-19 14:40:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:07,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:07,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:07,142 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:07,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:40:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:09,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 4077 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:40:09,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-19 14:40:11,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-19 14:40:13,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:13,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769015457] [2021-11-19 14:40:13,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769015457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:13,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2003500619] [2021-11-19 14:40:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:13,309 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:40:13,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:40:13,317 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:40:13,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 14:40:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 4077 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:15,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-19 14:40:16,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-11-19 14:40:17,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2003500619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:17,326 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:40:17,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-19 14:40:17,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983252607] [2021-11-19 14:40:17,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:17,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:17,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:17,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:17,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:40:17,329 INFO L87 Difference]: Start difference. First operand 6515 states and 8900 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:40:19,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:20,501 INFO L93 Difference]: Finished difference Result 12958 states and 17700 transitions. [2021-11-19 14:40:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:40:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 192 [2021-11-19 14:40:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:20,545 INFO L225 Difference]: With dead ends: 12958 [2021-11-19 14:40:20,546 INFO L226 Difference]: Without dead ends: 6449 [2021-11-19 14:40:20,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:40:20,574 INFO L933 BasicCegarLoop]: 1995 mSDtfsCounter, 5 mSDsluCounter, 5970 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 7965 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:20,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 7965 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 14:40:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-11-19 14:40:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 6421. [2021-11-19 14:40:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6421 states, 4640 states have (on average 1.3196120689655173) internal successors, (6123), 4669 states have internal predecessors, (6123), 1329 states have call successors, (1329), 452 states have call predecessors, (1329), 451 states have return successors, (1328), 1321 states have call predecessors, (1328), 1328 states have call successors, (1328) [2021-11-19 14:40:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6421 states to 6421 states and 8780 transitions. [2021-11-19 14:40:20,860 INFO L78 Accepts]: Start accepts. Automaton has 6421 states and 8780 transitions. Word has length 192 [2021-11-19 14:40:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:20,861 INFO L470 AbstractCegarLoop]: Abstraction has 6421 states and 8780 transitions. [2021-11-19 14:40:20,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:40:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6421 states and 8780 transitions. [2021-11-19 14:40:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-19 14:40:20,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:20,876 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:20,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:21,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:21,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:21,299 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:21,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:21,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1206900752, now seen corresponding path program 1 times [2021-11-19 14:40:21,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:21,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579823631] [2021-11-19 14:40:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:21,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:21,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:21,305 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:21,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:40:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:23,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 4119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:40:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-19 14:40:25,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-19 14:40:27,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:27,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579823631] [2021-11-19 14:40:27,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579823631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:27,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [288204412] [2021-11-19 14:40:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:27,258 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:40:27,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:40:27,276 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:40:27,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 14:40:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:29,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 4119 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:40:29,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2021-11-19 14:40:30,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-11-19 14:40:31,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [288204412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:31,497 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:40:31,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-19 14:40:31,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343319583] [2021-11-19 14:40:31,497 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:31,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:40:31,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:40:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:40:31,499 INFO L87 Difference]: Start difference. First operand 6421 states and 8780 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:40:33,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:37,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:43,382 INFO L93 Difference]: Finished difference Result 18920 states and 25938 transitions. [2021-11-19 14:40:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:40:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 197 [2021-11-19 14:40:43,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:43,458 INFO L225 Difference]: With dead ends: 18920 [2021-11-19 14:40:43,458 INFO L226 Difference]: Without dead ends: 12547 [2021-11-19 14:40:43,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:40:43,494 INFO L933 BasicCegarLoop]: 3019 mSDtfsCounter, 3087 mSDsluCounter, 4082 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 82 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3087 SdHoareTripleChecker+Valid, 7101 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:43,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3087 Valid, 7101 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 589 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2021-11-19 14:40:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12547 states. [2021-11-19 14:40:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12547 to 12537. [2021-11-19 14:40:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12537 states, 9153 states have (on average 1.3177100404239048) internal successors, (12061), 9210 states have internal predecessors, (12061), 2494 states have call successors, (2494), 890 states have call predecessors, (2494), 889 states have return successors, (2493), 2478 states have call predecessors, (2493), 2493 states have call successors, (2493) [2021-11-19 14:40:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12537 states to 12537 states and 17048 transitions. [2021-11-19 14:40:44,251 INFO L78 Accepts]: Start accepts. Automaton has 12537 states and 17048 transitions. Word has length 197 [2021-11-19 14:40:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:44,252 INFO L470 AbstractCegarLoop]: Abstraction has 12537 states and 17048 transitions. [2021-11-19 14:40:44,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:40:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 12537 states and 17048 transitions. [2021-11-19 14:40:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-19 14:40:44,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:44,269 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 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] [2021-11-19 14:40:44,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:44,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:40:44,692 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1145412212, now seen corresponding path program 1 times [2021-11-19 14:40:44,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:44,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207556477] [2021-11-19 14:40:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:44,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:44,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:44,699 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:44,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:40:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:47,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 4143 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:40:47,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-19 14:40:48,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-11-19 14:40:50,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:50,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207556477] [2021-11-19 14:40:50,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207556477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:50,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1363879478] [2021-11-19 14:40:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:50,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:40:50,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:40:50,270 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:40:50,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 14:40:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:52,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 4143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:40:52,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2021-11-19 14:40:53,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2021-11-19 14:40:54,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1363879478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:54,608 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:40:54,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-19 14:40:54,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567034331] [2021-11-19 14:40:54,609 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:54,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:40:54,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:54,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:40:54,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:40:54,610 INFO L87 Difference]: Start difference. First operand 12537 states and 17048 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-19 14:40:56,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:02,357 INFO L93 Difference]: Finished difference Result 33620 states and 45516 transitions. [2021-11-19 14:41:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:41:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 215 [2021-11-19 14:41:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:02,458 INFO L225 Difference]: With dead ends: 33620 [2021-11-19 14:41:02,458 INFO L226 Difference]: Without dead ends: 21143 [2021-11-19 14:41:02,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 846 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:41:02,508 INFO L933 BasicCegarLoop]: 2589 mSDtfsCounter, 3016 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3016 SdHoareTripleChecker+Valid, 5115 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:02,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3016 Valid, 5115 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 443 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2021-11-19 14:41:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21143 states. [2021-11-19 14:41:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21143 to 21009. [2021-11-19 14:41:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21009 states, 15521 states have (on average 1.3190516074995169) internal successors, (20473), 15606 states have internal predecessors, (20473), 3922 states have call successors, (3922), 1566 states have call predecessors, (3922), 1565 states have return successors, (3921), 3890 states have call predecessors, (3921), 3921 states have call successors, (3921) [2021-11-19 14:41:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21009 states to 21009 states and 28316 transitions. [2021-11-19 14:41:03,574 INFO L78 Accepts]: Start accepts. Automaton has 21009 states and 28316 transitions. Word has length 215 [2021-11-19 14:41:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:03,575 INFO L470 AbstractCegarLoop]: Abstraction has 21009 states and 28316 transitions. [2021-11-19 14:41:03,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-19 14:41:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 21009 states and 28316 transitions. [2021-11-19 14:41:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-19 14:41:03,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:03,600 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:03,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:03,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:04,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:41:04,014 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:04,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2138459709, now seen corresponding path program 1 times [2021-11-19 14:41:04,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:04,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555953010] [2021-11-19 14:41:04,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:04,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:04,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:04,023 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:04,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:41:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:06,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 4197 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:41:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-11-19 14:41:07,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-19 14:41:09,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:09,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555953010] [2021-11-19 14:41:09,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555953010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:09,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1591588286] [2021-11-19 14:41:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:09,699 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:41:09,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:41:09,711 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:41:09,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 14:41:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:11,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 4197 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:41:11,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-11-19 14:41:13,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-11-19 14:41:15,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1591588286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:15,087 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:41:15,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6, 6] total 15 [2021-11-19 14:41:15,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324087511] [2021-11-19 14:41:15,088 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:15,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:41:15,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:15,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:41:15,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:41:15,090 INFO L87 Difference]: Start difference. First operand 21009 states and 28316 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 3 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-19 14:41:18,589 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:19,793 INFO L93 Difference]: Finished difference Result 42057 states and 56683 transitions. [2021-11-19 14:41:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:41:19,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 3 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 219 [2021-11-19 14:41:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:19,885 INFO L225 Difference]: With dead ends: 42057 [2021-11-19 14:41:19,885 INFO L226 Difference]: Without dead ends: 21091 [2021-11-19 14:41:19,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 860 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:41:19,930 INFO L933 BasicCegarLoop]: 1973 mSDtfsCounter, 1053 mSDsluCounter, 6933 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 8906 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:19,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 8906 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 78 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2021-11-19 14:41:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21091 states. [2021-11-19 14:41:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21091 to 21009. [2021-11-19 14:41:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21009 states, 15521 states have (on average 1.3185361767927324) internal successors, (20465), 15606 states have internal predecessors, (20465), 3922 states have call successors, (3922), 1566 states have call predecessors, (3922), 1565 states have return successors, (3921), 3890 states have call predecessors, (3921), 3921 states have call successors, (3921) [2021-11-19 14:41:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21009 states to 21009 states and 28308 transitions. [2021-11-19 14:41:20,891 INFO L78 Accepts]: Start accepts. Automaton has 21009 states and 28308 transitions. Word has length 219 [2021-11-19 14:41:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:20,892 INFO L470 AbstractCegarLoop]: Abstraction has 21009 states and 28308 transitions. [2021-11-19 14:41:20,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 3 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-19 14:41:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 21009 states and 28308 transitions. [2021-11-19 14:41:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-19 14:41:20,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:20,918 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:20,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:21,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:21,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:41:21,331 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash 232056443, now seen corresponding path program 1 times [2021-11-19 14:41:21,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:21,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977798818] [2021-11-19 14:41:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:21,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:21,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:21,341 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:21,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:41:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:23,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 4197 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:41:23,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-11-19 14:41:25,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-19 14:41:28,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:28,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977798818] [2021-11-19 14:41:28,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977798818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:28,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1080108301] [2021-11-19 14:41:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:28,083 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:41:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:41:28,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:41:28,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 14:41:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:30,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 4197 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:41:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-11-19 14:41:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-11-19 14:41:38,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1080108301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:38,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:41:38,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [6, 6] total 23 [2021-11-19 14:41:38,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315853124] [2021-11-19 14:41:38,280 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:38,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 14:41:38,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:38,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 14:41:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:41:38,282 INFO L87 Difference]: Start difference. First operand 21009 states and 28308 transitions. Second operand has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 13 states have internal predecessors, (142), 5 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (49), 7 states have call predecessors, (49), 5 states have call successors, (49) [2021-11-19 14:41:44,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:46,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:49,683 INFO L93 Difference]: Finished difference Result 42256 states and 56978 transitions. [2021-11-19 14:41:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:41:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 13 states have internal predecessors, (142), 5 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (49), 7 states have call predecessors, (49), 5 states have call successors, (49) Word has length 219 [2021-11-19 14:41:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:49,804 INFO L225 Difference]: With dead ends: 42256 [2021-11-19 14:41:49,804 INFO L226 Difference]: Without dead ends: 21163 [2021-11-19 14:41:49,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 852 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 14:41:49,849 INFO L933 BasicCegarLoop]: 1970 mSDtfsCounter, 966 mSDsluCounter, 14761 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 16731 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:49,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 16731 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 178 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2021-11-19 14:41:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21163 states. [2021-11-19 14:41:50,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21163 to 21065. [2021-11-19 14:41:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21065 states, 15549 states have (on average 1.317705318670011) internal successors, (20489), 15662 states have internal predecessors, (20489), 3922 states have call successors, (3922), 1566 states have call predecessors, (3922), 1593 states have return successors, (4001), 3890 states have call predecessors, (4001), 3921 states have call successors, (4001) [2021-11-19 14:41:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21065 states to 21065 states and 28412 transitions. [2021-11-19 14:41:50,748 INFO L78 Accepts]: Start accepts. Automaton has 21065 states and 28412 transitions. Word has length 219 [2021-11-19 14:41:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:50,748 INFO L470 AbstractCegarLoop]: Abstraction has 21065 states and 28412 transitions. [2021-11-19 14:41:50,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 13 states have internal predecessors, (142), 5 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (49), 7 states have call predecessors, (49), 5 states have call successors, (49) [2021-11-19 14:41:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21065 states and 28412 transitions. [2021-11-19 14:41:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-19 14:41:50,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:50,774 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:50,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:51,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:51,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:51,194 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:51,195 INFO L85 PathProgramCache]: Analyzing trace with hash 406110663, now seen corresponding path program 1 times [2021-11-19 14:41:51,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:51,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457956434] [2021-11-19 14:41:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:51,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:51,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:51,204 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:51,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:41:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:53,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 4238 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:41:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-19 14:41:56,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-19 14:41:59,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:59,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457956434] [2021-11-19 14:41:59,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457956434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:59,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [638210890] [2021-11-19 14:41:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:59,708 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:41:59,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:41:59,709 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:41:59,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 14:42:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:01,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 4238 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:42:01,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2021-11-19 14:42:02,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2021-11-19 14:42:04,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [638210890] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:42:04,325 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:42:04,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 16 [2021-11-19 14:42:04,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255978903] [2021-11-19 14:42:04,326 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:42:04,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:42:04,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:42:04,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:42:04,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:42:04,327 INFO L87 Difference]: Start difference. First operand 21065 states and 28412 transitions. Second operand has 8 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 4 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 1 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-19 14:42:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:05,545 INFO L93 Difference]: Finished difference Result 21100 states and 28446 transitions. [2021-11-19 14:42:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:42:05,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 4 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 1 states have call predecessors, (28), 1 states have call successors, (28) Word has length 239 [2021-11-19 14:42:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:05,649 INFO L225 Difference]: With dead ends: 21100 [2021-11-19 14:42:05,649 INFO L226 Difference]: Without dead ends: 21097 [2021-11-19 14:42:05,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:42:05,661 INFO L933 BasicCegarLoop]: 1982 mSDtfsCounter, 20 mSDsluCounter, 7897 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 9879 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:05,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 9879 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:42:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21097 states. [2021-11-19 14:42:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21097 to 21097. [2021-11-19 14:42:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21097 states, 15573 states have (on average 1.3168304116098375) internal successors, (20507), 15686 states have internal predecessors, (20507), 3922 states have call successors, (3922), 1574 states have call predecessors, (3922), 1601 states have return successors, (4001), 3890 states have call predecessors, (4001), 3921 states have call successors, (4001) [2021-11-19 14:42:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21097 states to 21097 states and 28430 transitions. [2021-11-19 14:42:06,614 INFO L78 Accepts]: Start accepts. Automaton has 21097 states and 28430 transitions. Word has length 239 [2021-11-19 14:42:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:06,615 INFO L470 AbstractCegarLoop]: Abstraction has 21097 states and 28430 transitions. [2021-11-19 14:42:06,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 4 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 1 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-19 14:42:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 21097 states and 28430 transitions. [2021-11-19 14:42:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-19 14:42:06,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:06,681 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:42:06,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:06,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:07,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:42:07,095 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:42:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:42:07,096 INFO L85 PathProgramCache]: Analyzing trace with hash 161807236, now seen corresponding path program 1 times [2021-11-19 14:42:07,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:42:07,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401000667] [2021-11-19 14:42:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:07,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:42:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:42:07,104 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:42:07,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:42:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 4443 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:42:09,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-19 14:42:12,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2021-11-19 14:42:16,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:42:16,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401000667] [2021-11-19 14:42:16,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401000667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:42:16,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749427315] [2021-11-19 14:42:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:16,135 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:42:16,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:42:16,136 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:42:16,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 14:42:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:18,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 4443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:42:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2021-11-19 14:42:20,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2021-11-19 14:42:21,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [749427315] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:42:21,798 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:42:21,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 14 [2021-11-19 14:42:21,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268054398] [2021-11-19 14:42:21,799 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:42:21,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:42:21,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:42:21,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:42:21,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:42:21,800 INFO L87 Difference]: Start difference. First operand 21097 states and 28430 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-19 14:42:24,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:26,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:40,844 INFO L93 Difference]: Finished difference Result 58108 states and 78946 transitions. [2021-11-19 14:42:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:42:40,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 300 [2021-11-19 14:42:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:40,989 INFO L225 Difference]: With dead ends: 58108 [2021-11-19 14:42:40,989 INFO L226 Difference]: Without dead ends: 37071 [2021-11-19 14:42:41,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1202 GetRequests, 1186 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:42:41,033 INFO L933 BasicCegarLoop]: 3848 mSDtfsCounter, 4875 mSDsluCounter, 9324 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 392 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4875 SdHoareTripleChecker+Valid, 13172 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:41,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4875 Valid, 13172 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 848 Invalid, 2 Unknown, 0 Unchecked, 17.1s Time] [2021-11-19 14:42:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37071 states. [2021-11-19 14:42:42,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37071 to 21113. [2021-11-19 14:42:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21113 states, 15589 states have (on average 1.3165052280454166) internal successors, (20523), 15702 states have internal predecessors, (20523), 3922 states have call successors, (3922), 1574 states have call predecessors, (3922), 1601 states have return successors, (4001), 3890 states have call predecessors, (4001), 3921 states have call successors, (4001) [2021-11-19 14:42:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21113 states to 21113 states and 28446 transitions. [2021-11-19 14:42:42,204 INFO L78 Accepts]: Start accepts. Automaton has 21113 states and 28446 transitions. Word has length 300 [2021-11-19 14:42:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:42,205 INFO L470 AbstractCegarLoop]: Abstraction has 21113 states and 28446 transitions. [2021-11-19 14:42:42,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-19 14:42:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 21113 states and 28446 transitions. [2021-11-19 14:42:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-19 14:42:42,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:42,254 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 4, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:42:42,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:42,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:42,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:42:42,671 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:42:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:42:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash 884362871, now seen corresponding path program 1 times [2021-11-19 14:42:42,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:42:42,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996872438] [2021-11-19 14:42:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:42,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:42:42,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:42:42,678 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:42:42,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:42:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 4471 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:42:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-19 14:42:48,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-11-19 14:42:51,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:42:51,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996872438] [2021-11-19 14:42:51,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996872438] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:42:51,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [355019619] [2021-11-19 14:42:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:51,769 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:42:51,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:42:51,769 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:42:51,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 14:42:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:53,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 4471 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:42:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2021-11-19 14:42:56,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2021-11-19 14:42:59,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [355019619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:42:59,717 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:42:59,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 16 [2021-11-19 14:42:59,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400469548] [2021-11-19 14:42:59,718 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:42:59,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:42:59,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:42:59,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:42:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:42:59,719 INFO L87 Difference]: Start difference. First operand 21113 states and 28446 transitions. Second operand has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 4 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-19 14:43:02,041 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 [] [2021-11-19 14:43:04,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:38,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:38,868 INFO L93 Difference]: Finished difference Result 65942 states and 91022 transitions. [2021-11-19 14:43:38,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:43:38,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 4 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) Word has length 320 [2021-11-19 14:43:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:39,046 INFO L225 Difference]: With dead ends: 65942 [2021-11-19 14:43:39,046 INFO L226 Difference]: Without dead ends: 44889 [2021-11-19 14:43:39,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1287 GetRequests, 1265 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:43:39,093 INFO L933 BasicCegarLoop]: 5219 mSDtfsCounter, 5907 mSDsluCounter, 18974 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 1038 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6080 SdHoareTripleChecker+Valid, 24193 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1038 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:39,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6080 Valid, 24193 Invalid, 2534 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1038 Valid, 1494 Invalid, 2 Unknown, 0 Unchecked, 35.0s Time] [2021-11-19 14:43:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44889 states. [2021-11-19 14:43:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44889 to 21289. [2021-11-19 14:43:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21289 states, 15693 states have (on average 1.315427260562034) internal successors, (20643), 15806 states have internal predecessors, (20643), 3994 states have call successors, (3994), 1574 states have call predecessors, (3994), 1601 states have return successors, (4073), 3962 states have call predecessors, (4073), 3993 states have call successors, (4073) [2021-11-19 14:43:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21289 states to 21289 states and 28710 transitions. [2021-11-19 14:43:40,523 INFO L78 Accepts]: Start accepts. Automaton has 21289 states and 28710 transitions. Word has length 320 [2021-11-19 14:43:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:40,524 INFO L470 AbstractCegarLoop]: Abstraction has 21289 states and 28710 transitions. [2021-11-19 14:43:40,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 4 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-19 14:43:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 21289 states and 28710 transitions. [2021-11-19 14:43:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-11-19 14:43:40,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:40,687 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:40,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:40,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:41,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:43:41,110 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:41,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:41,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2066422350, now seen corresponding path program 1 times [2021-11-19 14:43:41,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:43:41,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353771110] [2021-11-19 14:43:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:41,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:43:41,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:43:41,117 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:43:41,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:43:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:44,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 5234 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:43:44,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-19 14:43:52,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2021-11-19 14:43:57,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:43:57,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353771110] [2021-11-19 14:43:57,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353771110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:43:57,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [641325838] [2021-11-19 14:43:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:57,663 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:43:57,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:43:57,664 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:43:57,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 14:43:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 5234 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:43:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 738 trivial. 0 not checked. [2021-11-19 14:44:03,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2021-11-19 14:44:05,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [641325838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:44:05,291 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:44:05,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:44:05,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950751682] [2021-11-19 14:44:05,292 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:05,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:44:05,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:44:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:44:05,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:44:05,294 INFO L87 Difference]: Start difference. First operand 21289 states and 28710 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 2 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-19 14:44:07,637 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:08,435 INFO L93 Difference]: Finished difference Result 42526 states and 57384 transitions. [2021-11-19 14:44:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:44:08,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 2 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) Word has length 532 [2021-11-19 14:44:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:08,523 INFO L225 Difference]: With dead ends: 42526 [2021-11-19 14:44:08,523 INFO L226 Difference]: Without dead ends: 21297 [2021-11-19 14:44:08,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2124 GetRequests, 2115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:44:08,589 INFO L933 BasicCegarLoop]: 1981 mSDtfsCounter, 0 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3958 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:08,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3958 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 14:44:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21297 states. [2021-11-19 14:44:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21297 to 21297. [2021-11-19 14:44:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21297 states, 15701 states have (on average 1.315266543532259) internal successors, (20651), 15814 states have internal predecessors, (20651), 3994 states have call successors, (3994), 1574 states have call predecessors, (3994), 1601 states have return successors, (4073), 3962 states have call predecessors, (4073), 3993 states have call successors, (4073) [2021-11-19 14:44:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21297 states to 21297 states and 28718 transitions. [2021-11-19 14:44:09,825 INFO L78 Accepts]: Start accepts. Automaton has 21297 states and 28718 transitions. Word has length 532 [2021-11-19 14:44:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:09,826 INFO L470 AbstractCegarLoop]: Abstraction has 21297 states and 28718 transitions. [2021-11-19 14:44:09,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 2 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-19 14:44:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 21297 states and 28718 transitions. [2021-11-19 14:44:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-11-19 14:44:09,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:09,879 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:09,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:10,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-19 14:44:10,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:44:10,297 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1728134800, now seen corresponding path program 1 times [2021-11-19 14:44:10,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:44:10,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689367771] [2021-11-19 14:44:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:10,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:44:10,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:44:10,304 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:44:10,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:44:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:13,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 5236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:44:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-19 14:44:21,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2021-11-19 14:44:26,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:44:26,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689367771] [2021-11-19 14:44:26,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689367771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:44:26,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [788319652] [2021-11-19 14:44:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:26,812 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:44:26,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:44:26,812 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:44:26,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:44:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 5236 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:44:29,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-11-19 14:44:37,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2021-11-19 14:44:40,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [788319652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:44:40,850 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:44:40,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [6, 6] total 13 [2021-11-19 14:44:40,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587531167] [2021-11-19 14:44:40,851 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:40,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:44:40,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:44:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:44:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:44:40,853 INFO L87 Difference]: Start difference. First operand 21297 states and 28718 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 5 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (131), 5 states have call predecessors, (131), 5 states have call successors, (131) [2021-11-19 14:44:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:42,576 INFO L93 Difference]: Finished difference Result 44276 states and 59994 transitions. [2021-11-19 14:44:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:44:42,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 5 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (131), 5 states have call predecessors, (131), 5 states have call successors, (131) Word has length 532 [2021-11-19 14:44:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:42,639 INFO L225 Difference]: With dead ends: 44276 [2021-11-19 14:44:42,639 INFO L226 Difference]: Without dead ends: 23039 [2021-11-19 14:44:42,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2126 GetRequests, 2114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:44:42,675 INFO L933 BasicCegarLoop]: 2401 mSDtfsCounter, 1824 mSDsluCounter, 3025 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 5426 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:42,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 5426 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:44:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23039 states. [2021-11-19 14:44:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23039 to 21537. [2021-11-19 14:44:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21537 states, 15901 states have (on average 1.3163323061442675) internal successors, (20931), 16014 states have internal predecessors, (20931), 4034 states have call successors, (4034), 1574 states have call predecessors, (4034), 1601 states have return successors, (4113), 4002 states have call predecessors, (4113), 4033 states have call successors, (4113) [2021-11-19 14:44:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21537 states to 21537 states and 29078 transitions. [2021-11-19 14:44:43,692 INFO L78 Accepts]: Start accepts. Automaton has 21537 states and 29078 transitions. Word has length 532 [2021-11-19 14:44:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:43,693 INFO L470 AbstractCegarLoop]: Abstraction has 21537 states and 29078 transitions. [2021-11-19 14:44:43,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 5 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (131), 5 states have call predecessors, (131), 5 states have call successors, (131) [2021-11-19 14:44:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 21537 states and 29078 transitions. [2021-11-19 14:44:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2021-11-19 14:44:43,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:43,755 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:43,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:44,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:44,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:44:44,175 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:44,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1503161800, now seen corresponding path program 1 times [2021-11-19 14:44:44,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:44:44,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037272125] [2021-11-19 14:44:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:44,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:44:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:44:44,182 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:44:44,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:44:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 5310 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:44:47,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2021-11-19 14:44:56,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-19 14:45:01,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:45:01,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037272125] [2021-11-19 14:45:01,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037272125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:45:01,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [116045233] [2021-11-19 14:45:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:01,347 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:45:01,348 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:45:01,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-19 14:45:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:03,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 5310 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:45:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2021-11-19 14:45:09,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-11-19 14:45:13,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [116045233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:45:13,269 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:45:13,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:45:13,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736554014] [2021-11-19 14:45:13,270 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:45:13,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:45:13,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:45:13,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:45:13,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:45:13,271 INFO L87 Difference]: Start difference. First operand 21537 states and 29078 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 3 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2021-11-19 14:45:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:45:16,460 INFO L93 Difference]: Finished difference Result 50586 states and 69794 transitions. [2021-11-19 14:45:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:45:16,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 3 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) Word has length 558 [2021-11-19 14:45:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:45:16,553 INFO L225 Difference]: With dead ends: 50586 [2021-11-19 14:45:16,553 INFO L226 Difference]: Without dead ends: 29109 [2021-11-19 14:45:16,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2228 GetRequests, 2219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:45:16,595 INFO L933 BasicCegarLoop]: 2758 mSDtfsCounter, 661 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 4744 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:45:16,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 4744 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:45:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29109 states. [2021-11-19 14:45:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29109 to 21537. [2021-11-19 14:45:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21537 states, 15901 states have (on average 1.3158291931325075) internal successors, (20923), 16014 states have internal predecessors, (20923), 4034 states have call successors, (4034), 1574 states have call predecessors, (4034), 1601 states have return successors, (4113), 4002 states have call predecessors, (4113), 4033 states have call successors, (4113) [2021-11-19 14:45:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21537 states to 21537 states and 29070 transitions. [2021-11-19 14:45:17,866 INFO L78 Accepts]: Start accepts. Automaton has 21537 states and 29070 transitions. Word has length 558 [2021-11-19 14:45:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:45:17,867 INFO L470 AbstractCegarLoop]: Abstraction has 21537 states and 29070 transitions. [2021-11-19 14:45:17,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 3 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2021-11-19 14:45:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21537 states and 29070 transitions. [2021-11-19 14:45:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-11-19 14:45:17,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:45:17,958 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:45:18,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:45:18,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:45:18,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:18,371 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:45:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:45:18,372 INFO L85 PathProgramCache]: Analyzing trace with hash 170727883, now seen corresponding path program 1 times [2021-11-19 14:45:18,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:45:18,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880934008] [2021-11-19 14:45:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:18,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:45:18,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:45:18,381 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:45:18,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:45:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:22,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 5314 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:45:22,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2021-11-19 14:45:30,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2021-11-19 14:45:35,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:45:35,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880934008] [2021-11-19 14:45:35,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880934008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:45:35,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1049698808] [2021-11-19 14:45:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:35,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:35,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:45:35,941 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:45:35,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-19 14:45:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:38,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 5314 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:45:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2021-11-19 14:45:43,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2021-11-19 14:45:46,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1049698808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:45:46,702 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:45:46,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-19 14:45:46,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032258530] [2021-11-19 14:45:46,703 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:45:46,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:45:46,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:45:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:45:46,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:45:46,705 INFO L87 Difference]: Start difference. First operand 21537 states and 29070 transitions. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 2 states have call successors, (124), 2 states have call predecessors, (124), 2 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2021-11-19 14:45:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:45:51,954 INFO L93 Difference]: Finished difference Result 67330 states and 95678 transitions. [2021-11-19 14:45:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:45:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 2 states have call successors, (124), 2 states have call predecessors, (124), 2 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) Word has length 562 [2021-11-19 14:45:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:45:52,066 INFO L225 Difference]: With dead ends: 67330 [2021-11-19 14:45:52,067 INFO L226 Difference]: Without dead ends: 45853 [2021-11-19 14:45:52,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2249 GetRequests, 2235 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:45:52,103 INFO L933 BasicCegarLoop]: 3538 mSDtfsCounter, 3579 mSDsluCounter, 8912 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3741 SdHoareTripleChecker+Valid, 12450 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:45:52,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3741 Valid, 12450 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [837 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 14:45:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45853 states. [2021-11-19 14:45:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45853 to 21585. [2021-11-19 14:45:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21585 states, 15949 states have (on average 1.3148786757790456) internal successors, (20971), 16062 states have internal predecessors, (20971), 4034 states have call successors, (4034), 1574 states have call predecessors, (4034), 1601 states have return successors, (4113), 4002 states have call predecessors, (4113), 4033 states have call successors, (4113) [2021-11-19 14:45:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21585 states to 21585 states and 29118 transitions. [2021-11-19 14:45:53,597 INFO L78 Accepts]: Start accepts. Automaton has 21585 states and 29118 transitions. Word has length 562 [2021-11-19 14:45:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:45:53,598 INFO L470 AbstractCegarLoop]: Abstraction has 21585 states and 29118 transitions. [2021-11-19 14:45:53,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 2 states have call successors, (124), 2 states have call predecessors, (124), 2 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2021-11-19 14:45:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 21585 states and 29118 transitions. [2021-11-19 14:45:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-11-19 14:45:53,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:45:53,631 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:45:53,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:45:53,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-19 14:45:54,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:45:54,033 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:45:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:45:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash -723642628, now seen corresponding path program 1 times [2021-11-19 14:45:54,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:45:54,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325248824] [2021-11-19 14:45:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:54,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:45:54,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:45:54,041 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:45:54,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:45:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 5317 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:45:57,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2021-11-19 14:46:04,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-19 14:46:09,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:09,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325248824] [2021-11-19 14:46:09,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325248824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:09,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [826490364] [2021-11-19 14:46:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:09,191 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:09,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:09,192 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:09,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-19 14:46:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:11,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 5317 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:46:11,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-19 14:46:17,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-11-19 14:46:22,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [826490364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:22,361 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:46:22,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-19 14:46:22,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591971831] [2021-11-19 14:46:22,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:22,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:46:22,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:46:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:46:22,365 INFO L87 Difference]: Start difference. First operand 21585 states and 29118 transitions. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 4 states have call successors, (125), 2 states have call predecessors, (125), 2 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2021-11-19 14:46:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:33,662 INFO L93 Difference]: Finished difference Result 59638 states and 83748 transitions. [2021-11-19 14:46:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:46:33,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 4 states have call successors, (125), 2 states have call predecessors, (125), 2 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) Word has length 560 [2021-11-19 14:46:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:33,795 INFO L225 Difference]: With dead ends: 59638 [2021-11-19 14:46:33,795 INFO L226 Difference]: Without dead ends: 38113 [2021-11-19 14:46:33,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2236 GetRequests, 2226 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:46:33,835 INFO L933 BasicCegarLoop]: 3655 mSDtfsCounter, 1239 mSDsluCounter, 4938 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 8593 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:33,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 8593 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-11-19 14:46:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38113 states. [2021-11-19 14:46:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38113 to 23233. [2021-11-19 14:46:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23233 states, 17309 states have (on average 1.3252643133629904) internal successors, (22939), 17422 states have internal predecessors, (22939), 4322 states have call successors, (4322), 1574 states have call predecessors, (4322), 1601 states have return successors, (4401), 4290 states have call predecessors, (4401), 4321 states have call successors, (4401) [2021-11-19 14:46:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23233 states to 23233 states and 31662 transitions. [2021-11-19 14:46:35,490 INFO L78 Accepts]: Start accepts. Automaton has 23233 states and 31662 transitions. Word has length 560 [2021-11-19 14:46:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:35,491 INFO L470 AbstractCegarLoop]: Abstraction has 23233 states and 31662 transitions. [2021-11-19 14:46:35,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 4 states have call successors, (125), 2 states have call predecessors, (125), 2 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2021-11-19 14:46:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 23233 states and 31662 transitions. [2021-11-19 14:46:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-11-19 14:46:35,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:35,540 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:35,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-19 14:46:35,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-19 14:46:35,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:35,943 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:35,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1883329852, now seen corresponding path program 1 times [2021-11-19 14:46:35,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:35,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82052104] [2021-11-19 14:46:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:35,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:35,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:35,952 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:35,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 14:46:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:39,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 5314 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:46:39,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2021-11-19 14:46:48,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-19 14:46:54,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:54,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82052104] [2021-11-19 14:46:54,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82052104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:54,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1754015915] [2021-11-19 14:46:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:54,591 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:54,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:54,592 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:54,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-19 14:46:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:57,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 5314 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:46:57,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-19 14:47:05,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-11-19 14:47:09,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1754015915] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:09,822 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:47:09,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:47:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479074692] [2021-11-19 14:47:09,823 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:09,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:47:09,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:09,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:47:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:47:09,825 INFO L87 Difference]: Start difference. First operand 23233 states and 31662 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 3 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) [2021-11-19 14:47:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:13,356 INFO L93 Difference]: Finished difference Result 53898 states and 74834 transitions. [2021-11-19 14:47:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:47:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 3 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) Word has length 560 [2021-11-19 14:47:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:13,432 INFO L225 Difference]: With dead ends: 53898 [2021-11-19 14:47:13,432 INFO L226 Difference]: Without dead ends: 30725 [2021-11-19 14:47:13,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2236 GetRequests, 2227 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:47:13,469 INFO L933 BasicCegarLoop]: 2720 mSDtfsCounter, 671 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 4798 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:13,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 4798 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:47:13,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30725 states. [2021-11-19 14:47:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30725 to 23233. [2021-11-19 14:47:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23233 states, 17309 states have (on average 1.3238777514587787) internal successors, (22915), 17422 states have internal predecessors, (22915), 4322 states have call successors, (4322), 1574 states have call predecessors, (4322), 1601 states have return successors, (4401), 4290 states have call predecessors, (4401), 4321 states have call successors, (4401) [2021-11-19 14:47:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23233 states to 23233 states and 31638 transitions. [2021-11-19 14:47:14,780 INFO L78 Accepts]: Start accepts. Automaton has 23233 states and 31638 transitions. Word has length 560 [2021-11-19 14:47:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:14,780 INFO L470 AbstractCegarLoop]: Abstraction has 23233 states and 31638 transitions. [2021-11-19 14:47:14,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 3 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) [2021-11-19 14:47:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 23233 states and 31638 transitions. [2021-11-19 14:47:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-11-19 14:47:14,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:14,824 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:14,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:15,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:15,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:15,225 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash 474393943, now seen corresponding path program 1 times [2021-11-19 14:47:15,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:15,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166671376] [2021-11-19 14:47:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:15,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:15,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:15,233 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:15,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 14:47:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:18,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 5348 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:47:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-11-19 14:47:27,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-11-19 14:47:32,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:32,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166671376] [2021-11-19 14:47:32,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166671376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:32,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [897698181] [2021-11-19 14:47:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:32,594 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:32,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:32,595 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:32,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-19 14:47:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:35,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 5348 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:47:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2021-11-19 14:47:42,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2021-11-19 14:47:46,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [897698181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:46,019 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:47:46,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6, 6] total 15 [2021-11-19 14:47:46,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207376902] [2021-11-19 14:47:46,020 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:46,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:47:46,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:47:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:47:46,022 INFO L87 Difference]: Start difference. First operand 23233 states and 31638 transitions. Second operand has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 3 states have call successors, (139), 2 states have call predecessors, (139), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) [2021-11-19 14:47:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:51,695 INFO L93 Difference]: Finished difference Result 35640 states and 49853 transitions. [2021-11-19 14:47:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:47:51,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 3 states have call successors, (139), 2 states have call predecessors, (139), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) Word has length 569 [2021-11-19 14:47:51,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:51,697 INFO L225 Difference]: With dead ends: 35640 [2021-11-19 14:47:51,697 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 14:47:51,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2276 GetRequests, 2261 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:47:51,745 INFO L933 BasicCegarLoop]: 2199 mSDtfsCounter, 2672 mSDsluCounter, 6594 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2772 SdHoareTripleChecker+Valid, 8793 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:51,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2772 Valid, 8793 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-19 14:47:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 14:47:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 14:47:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:47:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 14:47:51,890 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 569 [2021-11-19 14:47:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:51,890 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 14:47:51,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 3 states have call successors, (139), 2 states have call predecessors, (139), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) [2021-11-19 14:47:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 14:47:51,891 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 14:47:51,894 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:47:51,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:52,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:52,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2a6a4a-9eec-4c1c-b96e-abff506f6f76/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:52,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 14:48:13,014 WARN L227 SmtUtils]: Spent 20.54s on a formula simplification. DAG size of input: 173 DAG size of output: 173 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 14:48:33,894 WARN L227 SmtUtils]: Spent 20.54s on a formula simplification. DAG size of input: 173 DAG size of output: 173 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 14:49:24,143 WARN L227 SmtUtils]: Spent 43.31s on a formula simplification. DAG size of input: 316 DAG size of output: 313 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 14:49:44,653 WARN L227 SmtUtils]: Spent 20.51s on a formula simplification. DAG size of input: 173 DAG size of output: 173 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 14:50:05,912 WARN L227 SmtUtils]: Spent 20.87s on a formula simplification. DAG size of input: 173 DAG size of output: 173 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 14:50:39,748 WARN L227 SmtUtils]: Spent 22.02s on a formula simplification. DAG size of input: 173 DAG size of output: 173 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)