./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI --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 9e49a1360829f26f8d048b65d36d4ec5c4a8326faf8d0f409c04195556886603 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:24:37,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:24:37,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:24:37,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:24:37,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:24:37,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:24:37,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:24:37,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:24:37,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:24:37,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:24:37,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:24:37,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:24:37,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:24:37,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:24:37,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:24:37,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:24:37,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:24:37,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:24:37,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:24:37,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:24:37,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:24:37,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:24:37,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:24:37,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:24:37,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:24:37,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:24:37,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:24:37,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:24:37,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:24:37,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:24:37,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:24:37,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:24:37,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:24:37,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:24:37,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:24:37,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:24:37,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:24:37,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:24:37,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:24:37,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:24:37,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:24:37,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:24:37,823 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:24:37,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:24:37,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:24:37,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:24:37,830 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:24:37,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:24:37,831 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:24:37,831 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:24:37,832 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:24:37,832 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:24:37,833 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:24:37,834 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:24:37,834 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:24:37,835 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:24:37,835 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:24:37,835 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:24:37,835 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:24:37,836 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:24:37,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:24:37,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:24:37,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:24:37,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:24:37,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:24:37,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:24:37,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:24:37,839 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:24:37,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:24:37,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:24:37,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:24:37,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:24:37,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:24:37,841 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:24:37,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:24:37,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:24:37,842 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:24:37,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:24:37,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:24:37,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:24:37,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e49a1360829f26f8d048b65d36d4ec5c4a8326faf8d0f409c04195556886603 [2022-11-03 02:24:38,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:24:38,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:24:38,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:24:38,243 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:24:38,244 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:24:38,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i [2022-11-03 02:24:38,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/data/44f56a969/85b11b303883438c86c11790481981d0/FLAGb61a4f2d2 [2022-11-03 02:24:39,437 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:24:39,438 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i [2022-11-03 02:24:39,487 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/data/44f56a969/85b11b303883438c86c11790481981d0/FLAGb61a4f2d2 [2022-11-03 02:24:39,813 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/data/44f56a969/85b11b303883438c86c11790481981d0 [2022-11-03 02:24:39,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:24:39,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:24:39,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:24:39,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:24:39,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:24:39,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:24:39" (1/1) ... [2022-11-03 02:24:39,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e108a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:39, skipping insertion in model container [2022-11-03 02:24:39,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:24:39" (1/1) ... [2022-11-03 02:24:39,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:24:39,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:24:41,613 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_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i[215646,215659] [2022-11-03 02:24:41,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:24:41,748 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:24:42,215 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_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i[215646,215659] [2022-11-03 02:24:42,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:24:42,333 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:24:42,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42 WrapperNode [2022-11-03 02:24:42,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:24:42,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:24:42,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:24:42,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:24:42,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,539 INFO L138 Inliner]: procedures = 180, calls = 1491, calls flagged for inlining = 71, calls inlined = 66, statements flattened = 3754 [2022-11-03 02:24:42,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:24:42,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:24:42,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:24:42,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:24:42,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,814 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:24:42,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:24:42,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:24:42,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:24:42,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:24:42,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:42,903 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:24:42,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:24:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-03 02:24:42,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-03 02:24:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure digi_disconnect [2022-11-03 02:24:42,954 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_disconnect [2022-11-03 02:24:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:24:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure digi_break_ctl [2022-11-03 02:24:42,954 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_break_ctl [2022-11-03 02:24:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:24:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:24:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure cond_wait_interruptible_timeout_irqrestore [2022-11-03 02:24:42,955 INFO L138 BoogieDeclarations]: Found implementation of procedure cond_wait_interruptible_timeout_irqrestore [2022-11-03 02:24:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:24:42,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:24:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:24:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:24:42,956 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:24:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure digi_rx_throttle [2022-11-03 02:24:42,956 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_rx_throttle [2022-11-03 02:24:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_wakeup [2022-11-03 02:24:42,956 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_wakeup [2022-11-03 02:24:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:24:42,956 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:24:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-03 02:24:42,957 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-03 02:24:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-03 02:24:42,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-03 02:24:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure digi_startup [2022-11-03 02:24:42,958 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_startup [2022-11-03 02:24:42,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:24:42,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:24:42,958 INFO L130 BoogieDeclarations]: Found specification of procedure char_buf_ptr [2022-11-03 02:24:42,958 INFO L138 BoogieDeclarations]: Found implementation of procedure char_buf_ptr [2022-11-03 02:24:42,959 INFO L130 BoogieDeclarations]: Found specification of procedure digi_open [2022-11-03 02:24:42,959 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_open [2022-11-03 02:24:42,959 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 02:24:42,959 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 02:24:42,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-03 02:24:42,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-03 02:24:42,960 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-03 02:24:42,960 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-03 02:24:42,960 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:24:42,960 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:24:42,960 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2022-11-03 02:24:42,960 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2022-11-03 02:24:42,961 INFO L130 BoogieDeclarations]: Found specification of procedure digi_read_bulk_callback [2022-11-03 02:24:42,961 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_read_bulk_callback [2022-11-03 02:24:42,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:24:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:24:42,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:24:42,963 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write_bulk_callback [2022-11-03 02:24:42,964 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write_bulk_callback [2022-11-03 02:24:42,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:24:42,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:24:42,964 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write [2022-11-03 02:24:42,964 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write [2022-11-03 02:24:42,964 INFO L130 BoogieDeclarations]: Found specification of procedure digi_set_termios [2022-11-03 02:24:42,965 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_set_termios [2022-11-03 02:24:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure digi_wakeup_write_lock [2022-11-03 02:24:42,965 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_wakeup_write_lock [2022-11-03 02:24:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write_room [2022-11-03 02:24:42,966 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write_room [2022-11-03 02:24:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:24:42,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:24:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:24:42,966 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:24:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure digi_close [2022-11-03 02:24:42,967 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_close [2022-11-03 02:24:42,967 INFO L130 BoogieDeclarations]: Found specification of procedure digi_tiocmset [2022-11-03 02:24:42,967 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_tiocmset [2022-11-03 02:24:42,967 INFO L130 BoogieDeclarations]: Found specification of procedure digi_tiocmget [2022-11-03 02:24:42,967 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_tiocmget [2022-11-03 02:24:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:24:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:24:42,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:24:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 02:24:42,969 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 02:24:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure digi_set_modem_signals [2022-11-03 02:24:42,969 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_set_modem_signals [2022-11-03 02:24:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure tty_termios_baud_rate [2022-11-03 02:24:42,969 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_termios_baud_rate [2022-11-03 02:24:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:24:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure digi_port_probe [2022-11-03 02:24:42,970 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_port_probe [2022-11-03 02:24:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:24:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:24:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure digi_release [2022-11-03 02:24:42,971 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_release [2022-11-03 02:24:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 02:24:42,972 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write_inb_command [2022-11-03 02:24:42,972 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write_inb_command [2022-11-03 02:24:42,972 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write_oob_command [2022-11-03 02:24:42,972 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write_oob_command [2022-11-03 02:24:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:24:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-03 02:24:42,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-03 02:24:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure digi_port_init [2022-11-03 02:24:42,973 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_port_init [2022-11-03 02:24:42,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-03 02:24:42,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-03 02:24:42,974 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-03 02:24:42,974 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-03 02:24:42,974 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 02:24:42,974 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 02:24:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:24:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure digi_rx_unthrottle [2022-11-03 02:24:42,975 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_rx_unthrottle [2022-11-03 02:24:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:24:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-11-03 02:24:42,975 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-11-03 02:24:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure digi_dtr_rts [2022-11-03 02:24:42,977 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_dtr_rts [2022-11-03 02:24:42,979 INFO L130 BoogieDeclarations]: Found specification of procedure digi_chars_in_buffer [2022-11-03 02:24:42,980 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_chars_in_buffer [2022-11-03 02:24:42,980 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 02:24:42,980 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 02:24:42,982 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-03 02:24:42,982 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-03 02:24:42,982 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-03 02:24:42,983 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-03 02:24:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-03 02:24:42,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-03 02:24:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure digi_port_remove [2022-11-03 02:24:42,983 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_port_remove [2022-11-03 02:24:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-03 02:24:42,983 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-03 02:24:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2022-11-03 02:24:42,984 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2022-11-03 02:24:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:24:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2022-11-03 02:24:42,984 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2022-11-03 02:24:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-11-03 02:24:42,984 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-11-03 02:24:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:24:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-03 02:24:42,984 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-03 02:24:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:24:42,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:24:43,742 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:24:43,749 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:24:44,256 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:24:57,785 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:24:59,167 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:24:59,167 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:24:59,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:24:59 BoogieIcfgContainer [2022-11-03 02:24:59,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:24:59,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:24:59,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:24:59,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:24:59,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:24:39" (1/3) ... [2022-11-03 02:24:59,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f2c75f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:24:59, skipping insertion in model container [2022-11-03 02:24:59,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (2/3) ... [2022-11-03 02:24:59,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f2c75f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:24:59, skipping insertion in model container [2022-11-03 02:24:59,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:24:59" (3/3) ... [2022-11-03 02:24:59,183 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i [2022-11-03 02:24:59,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:24:59,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:24:59,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:24:59,326 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7cd32384, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:24:59,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:24:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 1042 states, 652 states have (on average 1.3849693251533743) internal successors, (903), 670 states have internal predecessors, (903), 329 states have call successors, (329), 60 states have call predecessors, (329), 59 states have return successors, (324), 320 states have call predecessors, (324), 324 states have call successors, (324) [2022-11-03 02:24:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:24:59,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:59,380 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:59,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:59,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:59,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1828433960, now seen corresponding path program 1 times [2022-11-03 02:24:59,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:59,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537242419] [2022-11-03 02:24:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:59,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-03 02:25:00,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:00,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537242419] [2022-11-03 02:25:00,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537242419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:00,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:00,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:00,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686999148] [2022-11-03 02:25:00,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:00,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:00,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:00,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:00,639 INFO L87 Difference]: Start difference. First operand has 1042 states, 652 states have (on average 1.3849693251533743) internal successors, (903), 670 states have internal predecessors, (903), 329 states have call successors, (329), 60 states have call predecessors, (329), 59 states have return successors, (324), 320 states have call predecessors, (324), 324 states have call successors, (324) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 02:25:02,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:05,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:07,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:07,034 INFO L93 Difference]: Finished difference Result 2857 states and 4380 transitions. [2022-11-03 02:25:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:07,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2022-11-03 02:25:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:07,086 INFO L225 Difference]: With dead ends: 2857 [2022-11-03 02:25:07,101 INFO L226 Difference]: Without dead ends: 1830 [2022-11-03 02:25:07,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:07,129 INFO L413 NwaCegarLoop]: 1717 mSDtfsCounter, 1156 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2996 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:07,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 2996 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 400 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 02:25:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-11-03 02:25:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1824. [2022-11-03 02:25:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1140 states have (on average 1.3614035087719298) internal successors, (1552), 1162 states have internal predecessors, (1552), 570 states have call successors, (570), 115 states have call predecessors, (570), 113 states have return successors, (569), 560 states have call predecessors, (569), 569 states have call successors, (569) [2022-11-03 02:25:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2691 transitions. [2022-11-03 02:25:07,389 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2691 transitions. Word has length 114 [2022-11-03 02:25:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:07,391 INFO L495 AbstractCegarLoop]: Abstraction has 1824 states and 2691 transitions. [2022-11-03 02:25:07,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 02:25:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2691 transitions. [2022-11-03 02:25:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:25:07,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:07,396 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:07,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:25:07,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:07,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:07,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1428856114, now seen corresponding path program 1 times [2022-11-03 02:25:07,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:07,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728923474] [2022-11-03 02:25:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:07,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-03 02:25:07,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:07,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728923474] [2022-11-03 02:25:07,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728923474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:07,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:07,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:07,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555372473] [2022-11-03 02:25:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:07,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:07,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:07,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:07,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:07,871 INFO L87 Difference]: Start difference. First operand 1824 states and 2691 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 02:25:09,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:12,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:15,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:15,854 INFO L93 Difference]: Finished difference Result 4437 states and 6519 transitions. [2022-11-03 02:25:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2022-11-03 02:25:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:15,877 INFO L225 Difference]: With dead ends: 4437 [2022-11-03 02:25:15,877 INFO L226 Difference]: Without dead ends: 2643 [2022-11-03 02:25:15,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:15,888 INFO L413 NwaCegarLoop]: 2345 mSDtfsCounter, 1090 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 3601 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:15,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 3601 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 488 Invalid, 3 Unknown, 0 Unchecked, 7.8s Time] [2022-11-03 02:25:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2022-11-03 02:25:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2636. [2022-11-03 02:25:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 1649 states have (on average 1.3553668890236508) internal successors, (2235), 1679 states have internal predecessors, (2235), 814 states have call successors, (814), 175 states have call predecessors, (814), 172 states have return successors, (814), 800 states have call predecessors, (814), 813 states have call successors, (814) [2022-11-03 02:25:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3863 transitions. [2022-11-03 02:25:16,043 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3863 transitions. Word has length 114 [2022-11-03 02:25:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:16,044 INFO L495 AbstractCegarLoop]: Abstraction has 2636 states and 3863 transitions. [2022-11-03 02:25:16,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 02:25:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3863 transitions. [2022-11-03 02:25:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-03 02:25:16,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:16,050 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:16,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:25:16,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:16,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1151051903, now seen corresponding path program 1 times [2022-11-03 02:25:16,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055653470] [2022-11-03 02:25:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:16,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-11-03 02:25:16,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:16,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055653470] [2022-11-03 02:25:16,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055653470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:16,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:16,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:16,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584433897] [2022-11-03 02:25:16,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:16,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:16,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:16,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:16,716 INFO L87 Difference]: Start difference. First operand 2636 states and 3863 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:25:18,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:21,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:23,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:25,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:25,987 INFO L93 Difference]: Finished difference Result 6523 states and 9571 transitions. [2022-11-03 02:25:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 219 [2022-11-03 02:25:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:26,016 INFO L225 Difference]: With dead ends: 6523 [2022-11-03 02:25:26,018 INFO L226 Difference]: Without dead ends: 3917 [2022-11-03 02:25:26,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:26,036 INFO L413 NwaCegarLoop]: 1764 mSDtfsCounter, 1267 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 75 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:26,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 2987 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 425 Invalid, 3 Unknown, 0 Unchecked, 9.0s Time] [2022-11-03 02:25:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2022-11-03 02:25:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3911. [2022-11-03 02:25:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3911 states, 2480 states have (on average 1.3370967741935484) internal successors, (3316), 2524 states have internal predecessors, (3316), 1162 states have call successors, (1162), 273 states have call predecessors, (1162), 268 states have return successors, (1162), 1141 states have call predecessors, (1162), 1161 states have call successors, (1162) [2022-11-03 02:25:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3911 states to 3911 states and 5640 transitions. [2022-11-03 02:25:26,246 INFO L78 Accepts]: Start accepts. Automaton has 3911 states and 5640 transitions. Word has length 219 [2022-11-03 02:25:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:26,247 INFO L495 AbstractCegarLoop]: Abstraction has 3911 states and 5640 transitions. [2022-11-03 02:25:26,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:25:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3911 states and 5640 transitions. [2022-11-03 02:25:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-03 02:25:26,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:26,256 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:26,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:25:26,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1550629749, now seen corresponding path program 1 times [2022-11-03 02:25:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:26,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889848029] [2022-11-03 02:25:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-11-03 02:25:27,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:27,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889848029] [2022-11-03 02:25:27,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889848029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:27,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:27,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:27,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131195361] [2022-11-03 02:25:27,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:27,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:27,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:27,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:27,012 INFO L87 Difference]: Start difference. First operand 3911 states and 5640 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:25:29,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:31,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:34,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:34,965 INFO L93 Difference]: Finished difference Result 9563 states and 13818 transitions. [2022-11-03 02:25:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:34,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 219 [2022-11-03 02:25:34,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:35,005 INFO L225 Difference]: With dead ends: 9563 [2022-11-03 02:25:35,005 INFO L226 Difference]: Without dead ends: 5688 [2022-11-03 02:25:35,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:35,029 INFO L413 NwaCegarLoop]: 1971 mSDtfsCounter, 1261 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 81 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:35,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1267 Valid, 3192 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 476 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2022-11-03 02:25:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2022-11-03 02:25:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 5681. [2022-11-03 02:25:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5681 states, 3662 states have (on average 1.3181321682140907) internal successors, (4827), 3724 states have internal predecessors, (4827), 1612 states have call successors, (1612), 414 states have call predecessors, (1612), 406 states have return successors, (1612), 1581 states have call predecessors, (1612), 1611 states have call successors, (1612) [2022-11-03 02:25:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5681 states to 5681 states and 8051 transitions. [2022-11-03 02:25:35,304 INFO L78 Accepts]: Start accepts. Automaton has 5681 states and 8051 transitions. Word has length 219 [2022-11-03 02:25:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:35,305 INFO L495 AbstractCegarLoop]: Abstraction has 5681 states and 8051 transitions. [2022-11-03 02:25:35,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:25:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5681 states and 8051 transitions. [2022-11-03 02:25:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-03 02:25:35,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:35,310 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:35,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:25:35,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash -264454885, now seen corresponding path program 1 times [2022-11-03 02:25:35,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:35,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203083030] [2022-11-03 02:25:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:35,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2022-11-03 02:25:35,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:35,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203083030] [2022-11-03 02:25:35,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203083030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:35,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:35,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:35,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690565977] [2022-11-03 02:25:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:35,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:35,792 INFO L87 Difference]: Start difference. First operand 5681 states and 8051 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:25:37,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:40,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:41,409 INFO L93 Difference]: Finished difference Result 5852 states and 8239 transitions. [2022-11-03 02:25:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:41,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 220 [2022-11-03 02:25:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:41,448 INFO L225 Difference]: With dead ends: 5852 [2022-11-03 02:25:41,448 INFO L226 Difference]: Without dead ends: 5849 [2022-11-03 02:25:41,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:41,455 INFO L413 NwaCegarLoop]: 1448 mSDtfsCounter, 1257 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:41,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1257 Valid, 1659 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 02:25:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2022-11-03 02:25:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 5785. [2022-11-03 02:25:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5785 states, 3722 states have (on average 1.313003761418592) internal successors, (4887), 3784 states have internal predecessors, (4887), 1628 states have call successors, (1628), 451 states have call predecessors, (1628), 434 states have return successors, (1628), 1588 states have call predecessors, (1628), 1627 states have call successors, (1628) [2022-11-03 02:25:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 8143 transitions. [2022-11-03 02:25:41,863 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 8143 transitions. Word has length 220 [2022-11-03 02:25:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:41,868 INFO L495 AbstractCegarLoop]: Abstraction has 5785 states and 8143 transitions. [2022-11-03 02:25:41,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:25:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 8143 transitions. [2022-11-03 02:25:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-11-03 02:25:41,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:41,874 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:41,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:25:41,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1796975676, now seen corresponding path program 1 times [2022-11-03 02:25:41,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:41,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185717705] [2022-11-03 02:25:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:41,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2022-11-03 02:25:43,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:43,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185717705] [2022-11-03 02:25:43,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185717705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:43,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975602242] [2022-11-03 02:25:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:43,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:43,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:43,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:43,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:25:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:45,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 3336 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:25:45,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-03 02:25:45,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:45,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975602242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:45,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:45,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:25:45,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362754044] [2022-11-03 02:25:45,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:45,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:25:45,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:25:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:45,304 INFO L87 Difference]: Start difference. First operand 5785 states and 8143 transitions. Second operand has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:25:47,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:50,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:51,048 INFO L93 Difference]: Finished difference Result 11556 states and 16275 transitions. [2022-11-03 02:25:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:25:51,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 227 [2022-11-03 02:25:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:51,083 INFO L225 Difference]: With dead ends: 11556 [2022-11-03 02:25:51,084 INFO L226 Difference]: Without dead ends: 5786 [2022-11-03 02:25:51,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:25:51,108 INFO L413 NwaCegarLoop]: 1423 mSDtfsCounter, 1 mSDsluCounter, 3053 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4249 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:51,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4249 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 364 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2022-11-03 02:25:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2022-11-03 02:25:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 5786. [2022-11-03 02:25:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5786 states, 3723 states have (on average 1.3129196884233145) internal successors, (4888), 3785 states have internal predecessors, (4888), 1628 states have call successors, (1628), 451 states have call predecessors, (1628), 434 states have return successors, (1628), 1588 states have call predecessors, (1628), 1627 states have call successors, (1628) [2022-11-03 02:25:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5786 states to 5786 states and 8144 transitions. [2022-11-03 02:25:51,566 INFO L78 Accepts]: Start accepts. Automaton has 5786 states and 8144 transitions. Word has length 227 [2022-11-03 02:25:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:51,567 INFO L495 AbstractCegarLoop]: Abstraction has 5786 states and 8144 transitions. [2022-11-03 02:25:51,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:25:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 5786 states and 8144 transitions. [2022-11-03 02:25:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-03 02:25:51,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:51,573 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:51,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:51,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:51,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:51,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1957917286, now seen corresponding path program 1 times [2022-11-03 02:25:51,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:51,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457090063] [2022-11-03 02:25:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:51,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2022-11-03 02:25:53,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457090063] [2022-11-03 02:25:53,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457090063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:53,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553475431] [2022-11-03 02:25:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:53,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:53,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:53,471 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:53,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44128afc-bb0f-4ada-a6d0-ddab1844ee8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:25:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 3469 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:25:55,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 362 proven. 47 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2022-11-03 02:25:56,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2022-11-03 02:25:56,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553475431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:56,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388490044] [2022-11-03 02:25:56,455 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2022-11-03 02:25:56,455 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:25:56,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:25:56,464 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:25:56,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:25:58,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:25:58,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:25:58,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:25:58,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:25:58,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:25:59,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:01,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:02,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:02,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:02,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:03,670 INFO L244 Elim1Store]: Index analysis took 4264 ms