./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--dvb-usb-v2--dvb-usb-lmedm04.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_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/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_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--dvb-usb-v2--dvb-usb-lmedm04.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/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_6c2ba608-fb29-4748-848c-db01d1011a8e/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 9baad8c3f39120ab2251378cc0d6fe7b52fdd04109a6ac87357d1c2188f7d5d6 --- 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 03:42:59,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:42:59,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:42:59,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:42:59,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:42:59,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:42:59,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:42:59,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:42:59,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:42:59,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:42:59,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:42:59,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:42:59,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:42:59,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:42:59,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:42:59,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:42:59,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:42:59,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:42:59,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:42:59,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:42:59,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:42:59,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:42:59,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:42:59,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:42:59,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:42:59,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:42:59,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:42:59,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:42:59,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:42:59,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:42:59,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:42:59,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:42:59,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:42:59,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:42:59,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:42:59,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:42:59,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:42:59,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:42:59,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:42:59,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:42:59,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:42:59,413 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:42:59,449 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:42:59,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:42:59,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:42:59,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:42:59,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:42:59,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:42:59,451 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:42:59,452 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:42:59,452 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:42:59,452 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:42:59,452 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:42:59,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:42:59,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:42:59,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:42:59,453 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:42:59,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:42:59,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:42:59,453 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:42:59,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:42:59,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:42:59,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:42:59,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:42:59,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:42:59,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:42:59,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:42:59,455 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:42:59,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:42:59,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:42:59,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:42:59,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:42:59,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:42:59,456 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:42:59,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:42:59,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:42:59,457 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:42:59,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:42:59,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:42:59,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:42:59,459 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_6c2ba608-fb29-4748-848c-db01d1011a8e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9baad8c3f39120ab2251378cc0d6fe7b52fdd04109a6ac87357d1c2188f7d5d6 [2022-11-03 03:42:59,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:42:59,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:42:59,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:42:59,792 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:42:59,792 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:42:59,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--dvb-usb-v2--dvb-usb-lmedm04.ko-entry_point.cil.out.i [2022-11-03 03:42:59,861 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/data/9c705c6f9/11fb1e97d97b4ca18838b601d471eeb6/FLAG3c1f10083 [2022-11-03 03:43:00,737 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:43:00,738 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--dvb-usb-v2--dvb-usb-lmedm04.ko-entry_point.cil.out.i [2022-11-03 03:43:00,796 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/data/9c705c6f9/11fb1e97d97b4ca18838b601d471eeb6/FLAG3c1f10083 [2022-11-03 03:43:01,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/data/9c705c6f9/11fb1e97d97b4ca18838b601d471eeb6 [2022-11-03 03:43:01,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:43:01,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:43:01,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:01,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:43:01,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:43:01,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:01" (1/1) ... [2022-11-03 03:43:01,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dac0659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:01, skipping insertion in model container [2022-11-03 03:43:01,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:01" (1/1) ... [2022-11-03 03:43:01,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:43:01,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:43:03,281 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_6c2ba608-fb29-4748-848c-db01d1011a8e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--dvb-usb-v2--dvb-usb-lmedm04.ko-entry_point.cil.out.i[299448,299461] [2022-11-03 03:43:03,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:03,551 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:43:03,982 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_6c2ba608-fb29-4748-848c-db01d1011a8e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--dvb-usb-v2--dvb-usb-lmedm04.ko-entry_point.cil.out.i[299448,299461] [2022-11-03 03:43:04,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:04,165 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:43:04,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04 WrapperNode [2022-11-03 03:43:04,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:04,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:04,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:43:04,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:43:04,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,454 INFO L138 Inliner]: procedures = 222, calls = 2022, calls flagged for inlining = 78, calls inlined = 59, statements flattened = 3180 [2022-11-03 03:43:04,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:04,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:43:04,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:43:04,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:43:04,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,740 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:43:04,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:43:04,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:43:04,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:43:04,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (1/1) ... [2022-11-03 03:43:04,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:04,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:43:04,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ba608-fb29-4748-848c-db01d1011a8e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:43:04,866 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-03 03:43:04,867 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-03 03:43:04,867 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 03:43:04,867 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 03:43:04,867 INFO L130 BoogieDeclarations]: Found specification of procedure lme2510_get_rc_config [2022-11-03 03:43:04,868 INFO L138 BoogieDeclarations]: Found implementation of procedure lme2510_get_rc_config [2022-11-03 03:43:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 03:43:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 03:43:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:43:04,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:43:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 03:43:04,869 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 03:43:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:43:04,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:43:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_i2c_mutex_of_dvb_usb_device [2022-11-03 03:43:04,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_i2c_mutex_of_dvb_usb_device [2022-11-03 03:43:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 03:43:04,870 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 03:43:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:43:04,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:43:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure __symbol_put [2022-11-03 03:43:04,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __symbol_put [2022-11-03 03:43:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:43:04,871 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:43:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure lme2510_download_firmware [2022-11-03 03:43:04,872 INFO L138 BoogieDeclarations]: Found implementation of procedure lme2510_download_firmware [2022-11-03 03:43:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 03:43:04,872 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 03:43:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:43:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:43:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~$Pointer$ [2022-11-03 03:43:04,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~$Pointer$ [2022-11-03 03:43:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:43:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:43:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure lme2510_usb_talk [2022-11-03 03:43:04,874 INFO L138 BoogieDeclarations]: Found implementation of procedure lme2510_usb_talk [2022-11-03 03:43:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 03:43:04,874 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 03:43:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 03:43:04,874 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 03:43:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-11-03 03:43:04,875 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-11-03 03:43:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 03:43:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 03:43:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure lme2510_streaming_ctrl [2022-11-03 03:43:04,876 INFO L138 BoogieDeclarations]: Found implementation of procedure lme2510_streaming_ctrl [2022-11-03 03:43:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-03 03:43:04,876 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-03 03:43:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:43:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 03:43:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 03:43:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_i2c_mutex_of_dvb_usb_device [2022-11-03 03:43:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_i2c_mutex_of_dvb_usb_device [2022-11-03 03:43:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~$Pointer$ [2022-11-03 03:43:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~$Pointer$ [2022-11-03 03:43:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 03:43:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 03:43:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure stv0299_writereg [2022-11-03 03:43:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure stv0299_writereg [2022-11-03 03:43:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 03:43:04,879 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 03:43:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:43:04,879 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:43:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:43:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:43:04,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:43:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure lme2510_i2c_xfer [2022-11-03 03:43:04,880 INFO L138 BoogieDeclarations]: Found implementation of procedure lme2510_i2c_xfer [2022-11-03 03:43:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure lme2510_identify_state [2022-11-03 03:43:04,880 INFO L138 BoogieDeclarations]: Found implementation of procedure lme2510_identify_state [2022-11-03 03:43:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 03:43:04,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 03:43:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_usb_mutex_of_dvb_usb_device [2022-11-03 03:43:04,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_usb_mutex_of_dvb_usb_device [2022-11-03 03:43:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:43:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 03:43:04,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 03:43:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:43:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 03:43:04,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 03:43:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:43:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure lme_firmware_switch [2022-11-03 03:43:04,883 INFO L138 BoogieDeclarations]: Found implementation of procedure lme_firmware_switch [2022-11-03 03:43:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure __symbol_get [2022-11-03 03:43:04,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __symbol_get [2022-11-03 03:43:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure lme_coldreset [2022-11-03 03:43:04,885 INFO L138 BoogieDeclarations]: Found implementation of procedure lme_coldreset [2022-11-03 03:43:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure lme2510_powerup [2022-11-03 03:43:04,886 INFO L138 BoogieDeclarations]: Found implementation of procedure lme2510_powerup [2022-11-03 03:43:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure request_firmware [2022-11-03 03:43:04,886 INFO L138 BoogieDeclarations]: Found implementation of procedure request_firmware [2022-11-03 03:43:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:43:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:43:04,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:43:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_usbv2_probe [2022-11-03 03:43:04,888 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_usbv2_probe [2022-11-03 03:43:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~$Pointer$ [2022-11-03 03:43:04,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~$Pointer$ [2022-11-03 03:43:05,635 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:43:05,638 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:43:06,011 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:43:11,111 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:43:11,852 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:43:11,853 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:43:11,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:11 BoogieIcfgContainer [2022-11-03 03:43:11,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:43:11,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:43:11,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:43:11,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:43:11,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:43:01" (1/3) ... [2022-11-03 03:43:11,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cd7204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:11, skipping insertion in model container [2022-11-03 03:43:11,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:04" (2/3) ... [2022-11-03 03:43:11,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cd7204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:11, skipping insertion in model container [2022-11-03 03:43:11,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:11" (3/3) ... [2022-11-03 03:43:11,874 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--dvb-usb-v2--dvb-usb-lmedm04.ko-entry_point.cil.out.i [2022-11-03 03:43:11,895 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:43:11,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:43:11,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:11,996 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;@317e5f22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:11,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:43:12,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 554 states, 361 states have (on average 1.3961218836565097) internal successors, (504), 386 states have internal predecessors, (504), 151 states have call successors, (151), 41 states have call predecessors, (151), 40 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2022-11-03 03:43:12,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:43:12,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:12,030 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:12,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:12,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:12,038 INFO L85 PathProgramCache]: Analyzing trace with hash 295980945, now seen corresponding path program 1 times [2022-11-03 03:43:12,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:12,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974181763] [2022-11-03 03:43:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:12,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-03 03:43:13,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:13,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974181763] [2022-11-03 03:43:13,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974181763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:13,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:13,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:13,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260524158] [2022-11-03 03:43:13,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:13,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:13,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:13,166 INFO L87 Difference]: Start difference. First operand has 554 states, 361 states have (on average 1.3961218836565097) internal successors, (504), 386 states have internal predecessors, (504), 151 states have call successors, (151), 41 states have call predecessors, (151), 40 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 03:43:15,787 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 03:43:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:17,481 INFO L93 Difference]: Finished difference Result 1590 states and 2361 transitions. [2022-11-03 03:43:17,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2022-11-03 03:43:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:17,502 INFO L225 Difference]: With dead ends: 1590 [2022-11-03 03:43:17,502 INFO L226 Difference]: Without dead ends: 1049 [2022-11-03 03:43:17,511 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 03:43:17,514 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 767 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:17,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1482 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 03:43:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-11-03 03:43:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1026. [2022-11-03 03:43:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 682 states have (on average 1.3826979472140764) internal successors, (943), 712 states have internal predecessors, (943), 266 states have call successors, (266), 78 states have call predecessors, (266), 77 states have return successors, (257), 252 states have call predecessors, (257), 257 states have call successors, (257) [2022-11-03 03:43:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1466 transitions. [2022-11-03 03:43:17,650 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1466 transitions. Word has length 134 [2022-11-03 03:43:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:17,653 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1466 transitions. [2022-11-03 03:43:17,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 03:43:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1466 transitions. [2022-11-03 03:43:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 03:43:17,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:17,668 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:17,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:43:17,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1665826393, now seen corresponding path program 1 times [2022-11-03 03:43:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:17,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184085875] [2022-11-03 03:43:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:17,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-03 03:43:18,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184085875] [2022-11-03 03:43:18,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184085875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:18,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:18,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:18,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178740413] [2022-11-03 03:43:18,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:18,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:18,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:18,399 INFO L87 Difference]: Start difference. First operand 1026 states and 1466 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 03:43:19,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:43:22,182 WARN L539 Checker$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 03:43:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:23,824 INFO L93 Difference]: Finished difference Result 2987 states and 4265 transitions. [2022-11-03 03:43:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:23,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 133 [2022-11-03 03:43:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:23,844 INFO L225 Difference]: With dead ends: 2987 [2022-11-03 03:43:23,845 INFO L226 Difference]: Without dead ends: 1991 [2022-11-03 03:43:23,849 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 03:43:23,850 INFO L413 NwaCegarLoop]: 825 mSDtfsCounter, 693 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:23,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 1491 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 03:43:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-11-03 03:43:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1980. [2022-11-03 03:43:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1325 states have (on average 1.3833962264150943) internal successors, (1833), 1379 states have internal predecessors, (1833), 501 states have call successors, (501), 154 states have call predecessors, (501), 153 states have return successors, (492), 479 states have call predecessors, (492), 492 states have call successors, (492) [2022-11-03 03:43:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2826 transitions. [2022-11-03 03:43:24,011 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2826 transitions. Word has length 133 [2022-11-03 03:43:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:24,014 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 2826 transitions. [2022-11-03 03:43:24,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 03:43:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2826 transitions. [2022-11-03 03:43:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 03:43:24,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:24,019 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:24,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:43:24,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:24,029 INFO L85 PathProgramCache]: Analyzing trace with hash -156240668, now seen corresponding path program 1 times [2022-11-03 03:43:24,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:24,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362045465] [2022-11-03 03:43:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:24,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-03 03:43:24,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:24,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362045465] [2022-11-03 03:43:24,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362045465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:24,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:24,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:24,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276663549] [2022-11-03 03:43:24,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:24,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:24,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:24,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:24,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:24,491 INFO L87 Difference]: Start difference. First operand 1980 states and 2826 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 03:43:26,803 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 03:43:28,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:28,554 INFO L93 Difference]: Finished difference Result 5729 states and 8171 transitions. [2022-11-03 03:43:28,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:28,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 140 [2022-11-03 03:43:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:28,578 INFO L225 Difference]: With dead ends: 5729 [2022-11-03 03:43:28,578 INFO L226 Difference]: Without dead ends: 3779 [2022-11-03 03:43:28,586 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 03:43:28,587 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 734 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:28,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1484 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-03 03:43:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2022-11-03 03:43:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3756. [2022-11-03 03:43:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3756 states, 2525 states have (on average 1.388118811881188) internal successors, (3505), 2629 states have internal predecessors, (3505), 931 states have call successors, (931), 300 states have call predecessors, (931), 299 states have return successors, (922), 891 states have call predecessors, (922), 922 states have call successors, (922) [2022-11-03 03:43:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3756 states to 3756 states and 5358 transitions. [2022-11-03 03:43:28,771 INFO L78 Accepts]: Start accepts. Automaton has 3756 states and 5358 transitions. Word has length 140 [2022-11-03 03:43:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:28,772 INFO L495 AbstractCegarLoop]: Abstraction has 3756 states and 5358 transitions. [2022-11-03 03:43:28,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 03:43:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3756 states and 5358 transitions. [2022-11-03 03:43:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 03:43:28,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:28,775 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:28,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:43:28,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash 832557721, now seen corresponding path program 1 times [2022-11-03 03:43:28,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:28,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768330270] [2022-11-03 03:43:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:28,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-03 03:43:29,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:29,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768330270] [2022-11-03 03:43:29,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768330270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:29,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:29,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:29,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482973262] [2022-11-03 03:43:29,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:29,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:29,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:29,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:29,223 INFO L87 Difference]: Start difference. First operand 3756 states and 5358 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 03:43:30,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:43:32,599 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 03:43:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:34,102 INFO L93 Difference]: Finished difference Result 8533 states and 12069 transitions. [2022-11-03 03:43:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:34,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 139 [2022-11-03 03:43:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:34,128 INFO L225 Difference]: With dead ends: 8533 [2022-11-03 03:43:34,128 INFO L226 Difference]: Without dead ends: 4807 [2022-11-03 03:43:34,141 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 03:43:34,142 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 287 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:34,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1424 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 03:43:34,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2022-11-03 03:43:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 4790. [2022-11-03 03:43:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4790 states, 3245 states have (on average 1.382126348228043) internal successors, (4485), 3349 states have internal predecessors, (4485), 1125 states have call successors, (1125), 420 states have call predecessors, (1125), 419 states have return successors, (1116), 1085 states have call predecessors, (1116), 1116 states have call successors, (1116) [2022-11-03 03:43:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4790 states to 4790 states and 6726 transitions. [2022-11-03 03:43:34,375 INFO L78 Accepts]: Start accepts. Automaton has 4790 states and 6726 transitions. Word has length 139 [2022-11-03 03:43:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:34,377 INFO L495 AbstractCegarLoop]: Abstraction has 4790 states and 6726 transitions. [2022-11-03 03:43:34,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 03:43:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4790 states and 6726 transitions. [2022-11-03 03:43:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 03:43:34,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:34,381 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:34,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:43:34,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:34,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:34,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1093084347, now seen corresponding path program 1 times [2022-11-03 03:43:34,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:34,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349263517] [2022-11-03 03:43:34,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:34,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-03 03:43:34,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:34,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349263517] [2022-11-03 03:43:34,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349263517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:34,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:34,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:34,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770520143] [2022-11-03 03:43:34,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:34,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:34,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:34,897 INFO L87 Difference]: Start difference. First operand 4790 states and 6726 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:43:37,219 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 03:43:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:38,539 INFO L93 Difference]: Finished difference Result 8501 states and 12082 transitions. [2022-11-03 03:43:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 148 [2022-11-03 03:43:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:38,584 INFO L225 Difference]: With dead ends: 8501 [2022-11-03 03:43:38,584 INFO L226 Difference]: Without dead ends: 8497 [2022-11-03 03:43:38,589 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 03:43:38,591 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 669 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:38,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1428 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 03:43:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8497 states. [2022-11-03 03:43:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8497 to 8488. [2022-11-03 03:43:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 5828 states have (on average 1.3927590940288264) internal successors, (8117), 6049 states have internal predecessors, (8117), 1950 states have call successors, (1950), 744 states have call predecessors, (1950), 709 states have return successors, (1989), 1823 states have call predecessors, (1989), 1941 states have call successors, (1989) [2022-11-03 03:43:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 12056 transitions. [2022-11-03 03:43:39,141 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 12056 transitions. Word has length 148 [2022-11-03 03:43:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:39,142 INFO L495 AbstractCegarLoop]: Abstraction has 8488 states and 12056 transitions. [2022-11-03 03:43:39,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:43:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 12056 transitions. [2022-11-03 03:43:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 03:43:39,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:39,145 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:39,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:43:39,145 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash 473941099, now seen corresponding path program 1 times [2022-11-03 03:43:39,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99960959] [2022-11-03 03:43:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:39,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-03 03:43:39,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:39,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99960959] [2022-11-03 03:43:39,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99960959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:39,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:39,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:39,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164821282] [2022-11-03 03:43:39,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:39,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:39,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:39,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:39,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:39,598 INFO L87 Difference]: Start difference. First operand 8488 states and 12056 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:43:41,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:43:43,877 WARN L539 Checker$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 03:43:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:45,561 INFO L93 Difference]: Finished difference Result 13742 states and 19295 transitions. [2022-11-03 03:43:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:45,561 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), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 149 [2022-11-03 03:43:45,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:45,631 INFO L225 Difference]: With dead ends: 13742 [2022-11-03 03:43:45,631 INFO L226 Difference]: Without dead ends: 13739 [2022-11-03 03:43:45,641 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 03:43:45,642 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 727 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:45,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 1430 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 03:43:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2022-11-03 03:43:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 13729. [2022-11-03 03:43:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13729 states, 9356 states have (on average 1.384138520735357) internal successors, (12950), 9676 states have internal predecessors, (12950), 3147 states have call successors, (3147), 1260 states have call predecessors, (3147), 1225 states have return successors, (3186), 2985 states have call predecessors, (3186), 3138 states have call successors, (3186) [2022-11-03 03:43:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13729 states to 13729 states and 19283 transitions. [2022-11-03 03:43:46,491 INFO L78 Accepts]: Start accepts. Automaton has 13729 states and 19283 transitions. Word has length 149 [2022-11-03 03:43:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:46,492 INFO L495 AbstractCegarLoop]: Abstraction has 13729 states and 19283 transitions. [2022-11-03 03:43:46,492 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), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:43:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 13729 states and 19283 transitions. [2022-11-03 03:43:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-03 03:43:46,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:46,494 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:46,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:43:46,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1807094536, now seen corresponding path program 1 times [2022-11-03 03:43:46,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:46,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412406985] [2022-11-03 03:43:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:46,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-03 03:43:46,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412406985] [2022-11-03 03:43:46,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412406985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:46,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:46,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423487193] [2022-11-03 03:43:46,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:46,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:46,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:46,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:46,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:46,953 INFO L87 Difference]: Start difference. First operand 13729 states and 19283 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:43:49,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:43:51,204 WARN L539 Checker$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 03:43:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:52,835 INFO L93 Difference]: Finished difference Result 13743 states and 19296 transitions. [2022-11-03 03:43:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2022-11-03 03:43:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:52,901 INFO L225 Difference]: With dead ends: 13743 [2022-11-03 03:43:52,901 INFO L226 Difference]: Without dead ends: 13740 [2022-11-03 03:43:52,907 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 03:43:52,908 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 724 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:52,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1433 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2022-11-03 03:43:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13740 states. [2022-11-03 03:43:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13740 to 13730. [2022-11-03 03:43:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13730 states, 9357 states have (on average 1.3840974671369028) internal successors, (12951), 9677 states have internal predecessors, (12951), 3147 states have call successors, (3147), 1260 states have call predecessors, (3147), 1225 states have return successors, (3186), 2985 states have call predecessors, (3186), 3138 states have call successors, (3186) [2022-11-03 03:43:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13730 states to 13730 states and 19284 transitions. [2022-11-03 03:43:53,601 INFO L78 Accepts]: Start accepts. Automaton has 13730 states and 19284 transitions. Word has length 150 [2022-11-03 03:43:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:53,601 INFO L495 AbstractCegarLoop]: Abstraction has 13730 states and 19284 transitions. [2022-11-03 03:43:53,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:43:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 13730 states and 19284 transitions. [2022-11-03 03:43:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 03:43:53,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:53,604 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:53,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:43:53,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:53,605 INFO L85 PathProgramCache]: Analyzing trace with hash 185182990, now seen corresponding path program 1 times [2022-11-03 03:43:53,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:53,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713305838] [2022-11-03 03:43:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-03 03:43:53,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:53,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713305838] [2022-11-03 03:43:53,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713305838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:53,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:53,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:53,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360207147] [2022-11-03 03:43:53,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:53,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:53,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:53,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:53,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:53,978 INFO L87 Difference]: Start difference. First operand 13730 states and 19284 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:43:56,297 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 03:43:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:57,777 INFO L93 Difference]: Finished difference Result 13744 states and 19297 transitions. [2022-11-03 03:43:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 151 [2022-11-03 03:43:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:57,830 INFO L225 Difference]: With dead ends: 13744 [2022-11-03 03:43:57,831 INFO L226 Difference]: Without dead ends: 13741 [2022-11-03 03:43:57,837 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 03:43:57,838 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 721 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:57,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1436 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 03:43:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2022-11-03 03:43:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 13731. [2022-11-03 03:43:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13731 states, 9358 states have (on average 1.3840564223124598) internal successors, (12952), 9678 states have internal predecessors, (12952), 3147 states have call successors, (3147), 1260 states have call predecessors, (3147), 1225 states have return successors, (3186), 2985 states have call predecessors, (3186), 3138 states have call successors, (3186) [2022-11-03 03:43:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13731 states to 13731 states and 19285 transitions. [2022-11-03 03:43:58,573 INFO L78 Accepts]: Start accepts. Automaton has 13731 states and 19285 transitions. Word has length 151 [2022-11-03 03:43:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:58,574 INFO L495 AbstractCegarLoop]: Abstraction has 13731 states and 19285 transitions. [2022-11-03 03:43:58,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:43:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 13731 states and 19285 transitions. [2022-11-03 03:43:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:43:58,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:58,578 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:58,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:43:58,579 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:58,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1445537483, now seen corresponding path program 1 times [2022-11-03 03:43:58,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:58,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954386271] [2022-11-03 03:43:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:58,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-03 03:43:58,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:58,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954386271] [2022-11-03 03:43:58,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954386271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:58,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:58,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:58,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690785275] [2022-11-03 03:43:58,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:58,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:58,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:58,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:58,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:58,983 INFO L87 Difference]: Start difference. First operand 13731 states and 19285 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:44:00,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:02,733 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 03:44:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:04,961 INFO L93 Difference]: Finished difference Result 25919 states and 37726 transitions. [2022-11-03 03:44:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:44:04,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2022-11-03 03:44:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:05,079 INFO L225 Difference]: With dead ends: 25919 [2022-11-03 03:44:05,080 INFO L226 Difference]: Without dead ends: 25909 [2022-11-03 03:44:05,091 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 03:44:05,092 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 714 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:05,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1512 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 03:44:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25909 states. [2022-11-03 03:44:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25909 to 25896. [2022-11-03 03:44:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25896 states, 17799 states have (on average 1.3879431428731952) internal successors, (24704), 18434 states have internal predecessors, (24704), 5874 states have call successors, (5874), 2291 states have call predecessors, (5874), 2222 states have return successors, (7065), 5555 states have call predecessors, (7065), 5865 states have call successors, (7065) [2022-11-03 03:44:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25896 states to 25896 states and 37643 transitions. [2022-11-03 03:44:06,522 INFO L78 Accepts]: Start accepts. Automaton has 25896 states and 37643 transitions. Word has length 152 [2022-11-03 03:44:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:06,523 INFO L495 AbstractCegarLoop]: Abstraction has 25896 states and 37643 transitions. [2022-11-03 03:44:06,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:44:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25896 states and 37643 transitions. [2022-11-03 03:44:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-03 03:44:06,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:06,529 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 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] [2022-11-03 03:44:06,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:44:06,529 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash -570276148, now seen corresponding path program 1 times [2022-11-03 03:44:06,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:06,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798888612] [2022-11-03 03:44:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:06,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-03 03:44:07,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:07,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798888612] [2022-11-03 03:44:07,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798888612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:07,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:07,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:44:07,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188589308] [2022-11-03 03:44:07,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:07,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:44:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:44:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:44:07,062 INFO L87 Difference]: Start difference. First operand 25896 states and 37643 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 03:44:09,175 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 03:44:11,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:13,427 INFO L93 Difference]: Finished difference Result 26610 states and 38453 transitions. [2022-11-03 03:44:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:44:13,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 214 [2022-11-03 03:44:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:13,537 INFO L225 Difference]: With dead ends: 26610 [2022-11-03 03:44:13,538 INFO L226 Difference]: Without dead ends: 26607 [2022-11-03 03:44:13,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 03:44:13,550 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 137 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:13,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1303 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 03:44:13,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26607 states. [2022-11-03 03:44:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26607 to 26603. [2022-11-03 03:44:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26603 states, 18245 states have (on average 1.3819676623732529) internal successors, (25214), 18879 states have internal predecessors, (25214), 5993 states have call successors, (5993), 2433 states have call predecessors, (5993), 2364 states have return successors, (7185), 5675 states have call predecessors, (7185), 5985 states have call successors, (7185) [2022-11-03 03:44:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26603 states to 26603 states and 38392 transitions. [2022-11-03 03:44:15,107 INFO L78 Accepts]: Start accepts. Automaton has 26603 states and 38392 transitions. Word has length 214 [2022-11-03 03:44:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:15,108 INFO L495 AbstractCegarLoop]: Abstraction has 26603 states and 38392 transitions. [2022-11-03 03:44:15,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 03:44:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 26603 states and 38392 transitions. [2022-11-03 03:44:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-03 03:44:15,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:15,117 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 3, 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] [2022-11-03 03:44:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:44:15,117 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1872420022, now seen corresponding path program 1 times [2022-11-03 03:44:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:15,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344409299] [2022-11-03 03:44:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms