./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-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW --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 267df3d840ee451a69f2c9c23fc4c286b307e31eb8c416518f7dce9b4c82858a --- 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-4e7fbc6 [2022-11-23 15:20:55,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:20:55,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:20:56,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:20:56,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:20:56,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:20:56,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:20:56,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:20:56,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:20:56,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:20:56,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:20:56,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:20:56,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:20:56,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:20:56,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:20:56,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:20:56,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:20:56,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:20:56,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:20:56,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:20:56,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:20:56,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:20:56,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:20:56,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:20:56,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:20:56,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:20:56,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:20:56,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:20:56,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:20:56,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:20:56,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:20:56,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:20:56,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:20:56,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:20:56,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:20:56,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:20:56,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:20:56,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:20:56,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:20:56,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:20:56,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:20:56,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:20:56,145 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:20:56,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:20:56,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:20:56,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:20:56,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:20:56,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:20:56,148 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:20:56,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:20:56,148 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:20:56,149 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:20:56,150 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:20:56,150 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:20:56,150 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:20:56,150 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:20:56,151 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:20:56,151 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:20:56,151 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:20:56,151 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:20:56,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:20:56,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:20:56,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:20:56,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:20:56,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:20:56,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:20:56,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:20:56,154 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:20:56,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:20:56,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:20:56,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:20:56,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:20:56,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:20:56,156 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:20:56,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:20:56,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:20:56,156 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:20:56,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:20:56,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:20:56,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:20:56,157 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_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 267df3d840ee451a69f2c9c23fc4c286b307e31eb8c416518f7dce9b4c82858a [2022-11-23 15:20:56,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:20:56,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:20:56,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:20:56,556 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:20:56,557 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:20:56,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2022-11-23 15:20:59,597 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:21:00,331 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:21:00,332 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2022-11-23 15:21:00,380 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/data/d9c9f34bf/65a3d9ba69a34448a5ecbdcc6a45f42d/FLAG5c65b6238 [2022-11-23 15:21:00,400 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/data/d9c9f34bf/65a3d9ba69a34448a5ecbdcc6a45f42d [2022-11-23 15:21:00,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:21:00,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:21:00,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:00,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:21:00,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:21:00,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:00" (1/1) ... [2022-11-23 15:21:00,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e4d947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:00, skipping insertion in model container [2022-11-23 15:21:00,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:00" (1/1) ... [2022-11-23 15:21:00,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:21:00,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:21:03,241 WARN L237 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_9af6d741-a0f6-4482-8da6-fadeded4a805/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[313744,313757] [2022-11-23 15:21:03,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:03,404 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:21:03,979 WARN L237 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_9af6d741-a0f6-4482-8da6-fadeded4a805/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[313744,313757] [2022-11-23 15:21:03,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:04,215 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:21:04,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04 WrapperNode [2022-11-23 15:21:04,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:04,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:04,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:21:04,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:21:04,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:04,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:04,623 INFO L138 Inliner]: procedures = 388, calls = 3928, calls flagged for inlining = 190, calls inlined = 187, statements flattened = 7911 [2022-11-23 15:21:04,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:04,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:21:04,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:21:04,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:21:04,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:04,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:04,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:04,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:04,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:04,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:05,018 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:05,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:05,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:21:05,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:21:05,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:21:05,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:21:05,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (1/1) ... [2022-11-23 15:21:05,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:05,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:21:05,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af6d741-a0f6-4482-8da6-fadeded4a805/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:21:05,184 INFO L130 BoogieDeclarations]: Found specification of procedure serial_proc_open [2022-11-23 15:21:05,184 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_proc_open [2022-11-23 15:21:05,184 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_throttle [2022-11-23 15:21:05,184 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_throttle [2022-11-23 15:21:05,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2022-11-23 15:21:05,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2022-11-23 15:21:05,185 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-23 15:21:05,185 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-23 15:21:05,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 15:21:05,185 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 15:21:05,185 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2022-11-23 15:21:05,186 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2022-11-23 15:21:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2022-11-23 15:21:05,186 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2022-11-23 15:21:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2022-11-23 15:21:05,186 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2022-11-23 15:21:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-23 15:21:05,187 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-23 15:21:05,187 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2022-11-23 15:21:05,187 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2022-11-23 15:21:05,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:21:05,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:21:05,187 INFO L130 BoogieDeclarations]: Found specification of procedure char_buf_ptr [2022-11-23 15:21:05,188 INFO L138 BoogieDeclarations]: Found implementation of procedure char_buf_ptr [2022-11-23 15:21:05,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_5 [2022-11-23 15:21:05,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_5 [2022-11-23 15:21:05,189 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2022-11-23 15:21:05,190 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2022-11-23 15:21:05,190 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2022-11-23 15:21:05,190 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2022-11-23 15:21:05,191 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-23 15:21:05,191 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-23 15:21:05,191 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2022-11-23 15:21:05,191 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2022-11-23 15:21:05,191 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister_drivers [2022-11-23 15:21:05,191 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister_drivers [2022-11-23 15:21:05,192 INFO L130 BoogieDeclarations]: Found specification of procedure usb_store_new_id [2022-11-23 15:21:05,192 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_store_new_id [2022-11-23 15:21:05,192 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2022-11-23 15:21:05,192 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2022-11-23 15:21:05,192 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_work [2022-11-23 15:21:05,193 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_work [2022-11-23 15:21:05,193 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-23 15:21:05,193 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-23 15:21:05,193 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_poison_urbs [2022-11-23 15:21:05,193 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_poison_urbs [2022-11-23 15:21:05,193 INFO L130 BoogieDeclarations]: Found specification of procedure serial_hangup [2022-11-23 15:21:05,194 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_hangup [2022-11-23 15:21:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2022-11-23 15:21:05,195 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2022-11-23 15:21:05,195 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2022-11-23 15:21:05,195 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2022-11-23 15:21:05,196 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2022-11-23 15:21:05,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2022-11-23 15:21:05,196 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 15:21:05,196 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 15:21:05,196 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unpoison_urb [2022-11-23 15:21:05,196 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unpoison_urb [2022-11-23 15:21:05,197 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2022-11-23 15:21:05,197 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2022-11-23 15:21:05,197 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-23 15:21:05,197 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2022-11-23 15:21:05,197 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2022-11-23 15:21:05,197 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 15:21:05,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 15:21:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 15:21:05,198 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 15:21:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2022-11-23 15:21:05,198 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2022-11-23 15:21:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:21:05,199 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-23 15:21:05,199 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-23 15:21:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2022-11-23 15:21:05,200 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2022-11-23 15:21:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2022-11-23 15:21:05,201 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2022-11-23 15:21:05,201 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 15:21:05,201 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 15:21:05,201 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2022-11-23 15:21:05,202 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2022-11-23 15:21:05,202 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_uint_must_check_helper [2022-11-23 15:21:05,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_uint_must_check_helper [2022-11-23 15:21:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 15:21:05,203 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 15:21:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:21:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2022-11-23 15:21:05,203 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2022-11-23 15:21:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-23 15:21:05,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-23 15:21:05,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:21:05,204 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2022-11-23 15:21:05,204 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2022-11-23 15:21:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2022-11-23 15:21:05,205 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2022-11-23 15:21:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2022-11-23 15:21:05,206 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2022-11-23 15:21:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:21:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-23 15:21:05,206 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-23 15:21:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2022-11-23 15:21:05,207 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2022-11-23 15:21:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2022-11-23 15:21:05,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2022-11-23 15:21:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-23 15:21:05,207 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-23 15:21:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2022-11-23 15:21:05,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2022-11-23 15:21:05,208 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 15:21:05,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 15:21:05,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:21:05,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:21:05,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:21:05,213 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 15:21:05,213 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 15:21:05,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 15:21:05,214 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-23 15:21:05,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-23 15:21:05,216 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2022-11-23 15:21:05,216 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2022-11-23 15:21:05,216 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-23 15:21:05,222 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-23 15:21:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2022-11-23 15:21:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2022-11-23 15:21:05,223 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 15:21:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 15:21:05,223 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2022-11-23 15:21:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2022-11-23 15:21:05,223 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 15:21:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 15:21:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:21:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:21:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2022-11-23 15:21:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2022-11-23 15:21:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-23 15:21:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-23 15:21:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure serial_break [2022-11-23 15:21:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_break [2022-11-23 15:21:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2022-11-23 15:21:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2022-11-23 15:21:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-23 15:21:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-23 15:21:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-11-23 15:21:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-11-23 15:21:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2022-11-23 15:21:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2022-11-23 15:21:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2022-11-23 15:21:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2022-11-23 15:21:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:21:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:21:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 15:21:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 15:21:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure new_id_show [2022-11-23 15:21:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure new_id_show [2022-11-23 15:21:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2022-11-23 15:21:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2022-11-23 15:21:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2022-11-23 15:21:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2022-11-23 15:21:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2022-11-23 15:21:05,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2022-11-23 15:21:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 15:21:05,228 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 15:21:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-23 15:21:05,228 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-23 15:21:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 15:21:05,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 15:21:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_4 [2022-11-23 15:21:05,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_4 [2022-11-23 15:21:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2022-11-23 15:21:05,230 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2022-11-23 15:21:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_msr_changed [2022-11-23 15:21:05,230 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_msr_changed [2022-11-23 15:21:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2022-11-23 15:21:05,230 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2022-11-23 15:21:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:21:05,230 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:21:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure new_id_store [2022-11-23 15:21:05,231 INFO L138 BoogieDeclarations]: Found implementation of procedure new_id_store [2022-11-23 15:21:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2022-11-23 15:21:05,231 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2022-11-23 15:21:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:21:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-23 15:21:05,232 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-23 15:21:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2022-11-23 15:21:05,232 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2022-11-23 15:21:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2022-11-23 15:21:05,233 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2022-11-23 15:21:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:21:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 15:21:05,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 15:21:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2022-11-23 15:21:05,233 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2022-11-23 15:21:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:21:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 15:21:05,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 15:21:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2022-11-23 15:21:05,234 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2022-11-23 15:21:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 15:21:05,234 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 15:21:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_resume [2022-11-23 15:21:05,235 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_resume [2022-11-23 15:21:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-23 15:21:05,235 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-23 15:21:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-23 15:21:05,235 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-23 15:21:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-23 15:21:05,235 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-23 15:21:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_softint [2022-11-23 15:21:05,236 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_softint [2022-11-23 15:21:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2022-11-23 15:21:05,236 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2022-11-23 15:21:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-23 15:21:05,236 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-23 15:21:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2022-11-23 15:21:05,237 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2022-11-23 15:21:05,237 INFO L130 BoogieDeclarations]: Found specification of procedure bus_unregister [2022-11-23 15:21:05,237 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_unregister [2022-11-23 15:21:05,237 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2022-11-23 15:21:05,237 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2022-11-23 15:21:05,237 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2022-11-23 15:21:05,237 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2022-11-23 15:21:05,238 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-11-23 15:21:05,238 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-11-23 15:21:05,238 INFO L130 BoogieDeclarations]: Found specification of procedure serial_wait_until_sent [2022-11-23 15:21:05,238 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_wait_until_sent [2022-11-23 15:21:05,238 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 15:21:05,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 15:21:05,238 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_match [2022-11-23 15:21:05,239 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_match [2022-11-23 15:21:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure serial_open [2022-11-23 15:21:05,239 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_open [2022-11-23 15:21:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 15:21:05,239 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 15:21:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2022-11-23 15:21:05,239 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2022-11-23 15:21:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 15:21:05,240 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 15:21:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:21:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure serial_set_termios [2022-11-23 15:21:05,244 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_set_termios [2022-11-23 15:21:05,245 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2022-11-23 15:21:05,245 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2022-11-23 15:21:05,245 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-23 15:21:05,245 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2022-11-23 15:21:05,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 15:21:05,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 15:21:05,245 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2022-11-23 15:21:05,246 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2022-11-23 15:21:05,246 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2022-11-23 15:21:05,247 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2022-11-23 15:21:05,248 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_get_by_minor [2022-11-23 15:21:05,248 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_get_by_minor [2022-11-23 15:21:05,248 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 15:21:05,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 15:21:05,248 INFO L130 BoogieDeclarations]: Found specification of procedure serial_install [2022-11-23 15:21:05,248 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_install [2022-11-23 15:21:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_handle_sysrq_char [2022-11-23 15:21:05,249 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_handle_sysrq_char [2022-11-23 15:21:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2022-11-23 15:21:05,249 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2022-11-23 15:21:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-23 15:21:05,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-23 15:21:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_unpoison_port_urbs [2022-11-23 15:21:05,249 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_unpoison_port_urbs [2022-11-23 15:21:05,250 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2022-11-23 15:21:05,250 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2022-11-23 15:21:05,250 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2022-11-23 15:21:05,250 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2022-11-23 15:21:05,250 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 15:21:05,250 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 15:21:05,250 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 15:21:05,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 15:21:05,251 INFO L130 BoogieDeclarations]: Found specification of procedure get_iface_id [2022-11-23 15:21:05,251 INFO L138 BoogieDeclarations]: Found implementation of procedure get_iface_id [2022-11-23 15:21:05,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:21:05,251 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2022-11-23 15:21:05,251 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2022-11-23 15:21:06,364 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:21:06,367 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:21:06,861 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 15:21:20,205 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:21:21,938 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:21:21,938 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 15:21:21,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:21 BoogieIcfgContainer [2022-11-23 15:21:21,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:21:21,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:21:21,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:21:21,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:21:21,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:21:00" (1/3) ... [2022-11-23 15:21:21,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f57d3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:21, skipping insertion in model container [2022-11-23 15:21:21,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:04" (2/3) ... [2022-11-23 15:21:21,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f57d3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:21, skipping insertion in model container [2022-11-23 15:21:21,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:21" (3/3) ... [2022-11-23 15:21:21,957 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2022-11-23 15:21:21,982 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:21:21,982 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:21:22,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:21:22,102 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;@7446a794, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:21:22,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:21:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 1802 states, 1152 states have (on average 1.359375) internal successors, (1566), 1188 states have internal predecessors, (1566), 520 states have call successors, (520), 129 states have call predecessors, (520), 128 states have return successors, (509), 496 states have call predecessors, (509), 509 states have call successors, (509) [2022-11-23 15:21:22,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-23 15:21:22,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:22,178 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:22,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:22,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:22,186 INFO L85 PathProgramCache]: Analyzing trace with hash 647147952, now seen corresponding path program 1 times [2022-11-23 15:21:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:22,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692198515] [2022-11-23 15:21:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:22,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-11-23 15:21:24,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692198515] [2022-11-23 15:21:24,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692198515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:24,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:24,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:21:24,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600785117] [2022-11-23 15:21:24,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:24,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:24,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:24,082 INFO L87 Difference]: Start difference. First operand has 1802 states, 1152 states have (on average 1.359375) internal successors, (1566), 1188 states have internal predecessors, (1566), 520 states have call successors, (520), 129 states have call predecessors, (520), 128 states have return successors, (509), 496 states have call predecessors, (509), 509 states have call successors, (509) Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 15:21:26,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:21:28,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:21:30,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:21:32,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:21:35,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:21:37,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:37,853 INFO L93 Difference]: Finished difference Result 4942 states and 7211 transitions. [2022-11-23 15:21:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:37,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 228 [2022-11-23 15:21:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:37,920 INFO L225 Difference]: With dead ends: 4942 [2022-11-23 15:21:37,921 INFO L226 Difference]: Without dead ends: 3146 [2022-11-23 15:21:37,940 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 [2022-11-23 15:21:37,949 INFO L413 NwaCegarLoop]: 2681 mSDtfsCounter, 1977 mSDsluCounter, 2222 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1977 SdHoareTripleChecker+Valid, 4903 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:37,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1977 Valid, 4903 Invalid, 630 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 625 Invalid, 3 Unknown, 0 Unchecked, 13.4s Time] [2022-11-23 15:21:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-11-23 15:21:38,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 3140. [2022-11-23 15:21:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2026 states have (on average 1.3543928923988153) internal successors, (2744), 2069 states have internal predecessors, (2744), 877 states have call successors, (877), 237 states have call predecessors, (877), 236 states have return successors, (887), 849 states have call predecessors, (887), 875 states have call successors, (887) [2022-11-23 15:21:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4508 transitions. [2022-11-23 15:21:38,273 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4508 transitions. Word has length 228 [2022-11-23 15:21:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:38,277 INFO L495 AbstractCegarLoop]: Abstraction has 3140 states and 4508 transitions. [2022-11-23 15:21:38,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 15:21:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4508 transitions. [2022-11-23 15:21:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-23 15:21:38,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:38,295 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:38,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:21:38,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash 514783971, now seen corresponding path program 1 times [2022-11-23 15:21:38,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:38,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736036593] [2022-11-23 15:21:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:38,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-11-23 15:21:39,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:39,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736036593] [2022-11-23 15:21:39,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736036593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:39,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:39,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:21:39,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406688510] [2022-11-23 15:21:39,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:39,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:39,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:39,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:39,339 INFO L87 Difference]: Start difference. First operand 3140 states and 4508 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 15:21:41,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:21:43,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:21:45,788 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 [] [2022-11-23 15:21:50,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:50,755 INFO L93 Difference]: Finished difference Result 7716 states and 11117 transitions. [2022-11-23 15:21:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:50,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 238 [2022-11-23 15:21:50,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:50,802 INFO L225 Difference]: With dead ends: 7716 [2022-11-23 15:21:50,803 INFO L226 Difference]: Without dead ends: 5965 [2022-11-23 15:21:50,815 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 [2022-11-23 15:21:50,816 INFO L413 NwaCegarLoop]: 2693 mSDtfsCounter, 2105 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2105 SdHoareTripleChecker+Valid, 4892 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:50,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2105 Valid, 4892 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 621 Invalid, 3 Unknown, 0 Unchecked, 11.1s Time] [2022-11-23 15:21:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2022-11-23 15:21:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 5955. [2022-11-23 15:21:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5955 states, 3849 states have (on average 1.3574954533645103) internal successors, (5225), 3936 states have internal predecessors, (5225), 1644 states have call successors, (1644), 462 states have call predecessors, (1644), 461 states have return successors, (1685), 1588 states have call predecessors, (1685), 1642 states have call successors, (1685) [2022-11-23 15:21:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5955 states to 5955 states and 8554 transitions. [2022-11-23 15:21:51,207 INFO L78 Accepts]: Start accepts. Automaton has 5955 states and 8554 transitions. Word has length 238 [2022-11-23 15:21:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:51,212 INFO L495 AbstractCegarLoop]: Abstraction has 5955 states and 8554 transitions. [2022-11-23 15:21:51,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 15:21:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 5955 states and 8554 transitions. [2022-11-23 15:21:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-23 15:21:51,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:51,232 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:51,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:21:51,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:51,243 INFO L85 PathProgramCache]: Analyzing trace with hash -593290982, now seen corresponding path program 1 times [2022-11-23 15:21:51,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:51,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353668252] [2022-11-23 15:21:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:51,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-11-23 15:21:52,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:52,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353668252] [2022-11-23 15:21:52,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353668252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:52,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:52,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:21:52,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450030294] [2022-11-23 15:21:52,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:52,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:52,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:52,122 INFO L87 Difference]: Start difference. First operand 5955 states and 8554 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-23 15:21:54,967 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 [] [2022-11-23 15:21:57,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:22:03,230 INFO L93 Difference]: Finished difference Result 17432 states and 25274 transitions. [2022-11-23 15:22:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:22:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 255 [2022-11-23 15:22:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:22:03,320 INFO L225 Difference]: With dead ends: 17432 [2022-11-23 15:22:03,320 INFO L226 Difference]: Without dead ends: 11524 [2022-11-23 15:22:03,352 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 [2022-11-23 15:22:03,353 INFO L413 NwaCegarLoop]: 2858 mSDtfsCounter, 2392 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2392 SdHoareTripleChecker+Valid, 5054 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:22:03,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2392 Valid, 5054 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 667 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2022-11-23 15:22:03,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11524 states. [2022-11-23 15:22:03,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11524 to 11499. [2022-11-23 15:22:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11499 states, 7422 states have (on average 1.356238210724872) internal successors, (10066), 7592 states have internal predecessors, (10066), 3163 states have call successors, (3163), 914 states have call predecessors, (3163), 913 states have return successors, (3533), 3052 states have call predecessors, (3533), 3161 states have call successors, (3533) [2022-11-23 15:22:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11499 states to 11499 states and 16762 transitions. [2022-11-23 15:22:03,952 INFO L78 Accepts]: Start accepts. Automaton has 11499 states and 16762 transitions. Word has length 255 [2022-11-23 15:22:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:22:03,953 INFO L495 AbstractCegarLoop]: Abstraction has 11499 states and 16762 transitions. [2022-11-23 15:22:03,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-23 15:22:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 11499 states and 16762 transitions. [2022-11-23 15:22:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-23 15:22:03,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:22:03,968 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:22:03,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:22:03,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:22:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2063127038, now seen corresponding path program 1 times [2022-11-23 15:22:03,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:22:03,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025565974] [2022-11-23 15:22:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:03,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:22:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-11-23 15:22:04,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:04,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025565974] [2022-11-23 15:22:04,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025565974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:22:04,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:22:04,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:22:04,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378144209] [2022-11-23 15:22:04,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:22:04,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:22:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:22:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:22:04,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:22:04,710 INFO L87 Difference]: Start difference. First operand 11499 states and 16762 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 15:22:06,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:08,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:12,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:14,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:16,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:22:20,720 INFO L93 Difference]: Finished difference Result 28547 states and 41772 transitions. [2022-11-23 15:22:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:22:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 248 [2022-11-23 15:22:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:22:20,857 INFO L225 Difference]: With dead ends: 28547 [2022-11-23 15:22:20,857 INFO L226 Difference]: Without dead ends: 17095 [2022-11-23 15:22:20,925 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 [2022-11-23 15:22:20,926 INFO L413 NwaCegarLoop]: 3409 mSDtfsCounter, 2331 mSDsluCounter, 2223 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 5632 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:22:20,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2331 Valid, 5632 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 762 Invalid, 3 Unknown, 0 Unchecked, 15.4s Time] [2022-11-23 15:22:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17095 states. [2022-11-23 15:22:21,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17095 to 17069. [2022-11-23 15:22:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17069 states, 10992 states have (on average 1.3541666666666667) internal successors, (14885), 11249 states have internal predecessors, (14885), 4712 states have call successors, (4712), 1369 states have call predecessors, (4712), 1364 states have return successors, (5450), 4540 states have call predecessors, (5450), 4710 states have call successors, (5450) [2022-11-23 15:22:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17069 states to 17069 states and 25047 transitions. [2022-11-23 15:22:21,915 INFO L78 Accepts]: Start accepts. Automaton has 17069 states and 25047 transitions. Word has length 248 [2022-11-23 15:22:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:22:21,916 INFO L495 AbstractCegarLoop]: Abstraction has 17069 states and 25047 transitions. [2022-11-23 15:22:21,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 15:22:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 17069 states and 25047 transitions. [2022-11-23 15:22:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-23 15:22:21,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:22:21,933 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:22:21,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:22:21,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:22:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:21,934 INFO L85 PathProgramCache]: Analyzing trace with hash -827230131, now seen corresponding path program 1 times [2022-11-23 15:22:21,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:22:21,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164854919] [2022-11-23 15:22:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:21,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:22:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-23 15:22:22,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:22,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164854919] [2022-11-23 15:22:22,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164854919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:22:22,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:22:22,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:22:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162193521] [2022-11-23 15:22:22,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:22:22,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:22:22,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:22:22,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:22:22,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:22:22,737 INFO L87 Difference]: Start difference. First operand 17069 states and 25047 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-23 15:22:24,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:26,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:29,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:31,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:33,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:37,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:22:37,852 INFO L93 Difference]: Finished difference Result 46797 states and 68284 transitions. [2022-11-23 15:22:37,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:22:37,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 253 [2022-11-23 15:22:37,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:22:38,042 INFO L225 Difference]: With dead ends: 46797 [2022-11-23 15:22:38,042 INFO L226 Difference]: Without dead ends: 29788 [2022-11-23 15:22:38,122 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 [2022-11-23 15:22:38,124 INFO L413 NwaCegarLoop]: 3576 mSDtfsCounter, 2034 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2034 SdHoareTripleChecker+Valid, 5739 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:22:38,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2034 Valid, 5739 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 897 Invalid, 2 Unknown, 0 Unchecked, 14.0s Time] [2022-11-23 15:22:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29788 states. [2022-11-23 15:22:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29788 to 29759. [2022-11-23 15:22:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29759 states, 19093 states have (on average 1.3470381815324988) internal successors, (25719), 19551 states have internal predecessors, (25719), 8168 states have call successors, (8168), 2501 states have call predecessors, (8168), 2497 states have return successors, (9392), 7858 states have call predecessors, (9392), 8166 states have call successors, (9392) [2022-11-23 15:22:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29759 states to 29759 states and 43279 transitions. [2022-11-23 15:22:39,902 INFO L78 Accepts]: Start accepts. Automaton has 29759 states and 43279 transitions. Word has length 253 [2022-11-23 15:22:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:22:39,902 INFO L495 AbstractCegarLoop]: Abstraction has 29759 states and 43279 transitions. [2022-11-23 15:22:39,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-23 15:22:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 29759 states and 43279 transitions. [2022-11-23 15:22:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-11-23 15:22:39,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:22:39,973 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:22:39,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:22:39,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:22:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:39,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1786158041, now seen corresponding path program 1 times [2022-11-23 15:22:39,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:22:39,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061730347] [2022-11-23 15:22:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:39,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:22:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-23 15:22:41,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:41,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061730347] [2022-11-23 15:22:41,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061730347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:22:41,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:22:41,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:22:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307825790] [2022-11-23 15:22:41,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:22:41,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:22:41,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:22:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:22:41,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:22:41,081 INFO L87 Difference]: Start difference. First operand 29759 states and 43279 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 15:22:43,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:45,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:22:50,150 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 [] [2022-11-23 15:22:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:22:55,067 INFO L93 Difference]: Finished difference Result 65375 states and 94797 transitions. [2022-11-23 15:22:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:22:55,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 297 [2022-11-23 15:22:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:22:55,357 INFO L225 Difference]: With dead ends: 65375 [2022-11-23 15:22:55,357 INFO L226 Difference]: Without dead ends: 35676 [2022-11-23 15:22:55,478 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 [2022-11-23 15:22:55,479 INFO L413 NwaCegarLoop]: 3960 mSDtfsCounter, 2342 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2342 SdHoareTripleChecker+Valid, 5855 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:22:55,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2342 Valid, 5855 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 843 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2022-11-23 15:22:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35676 states. [2022-11-23 15:22:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35676 to 35573. [2022-11-23 15:22:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35573 states, 22788 states have (on average 1.3436018957345972) internal successors, (30618), 23328 states have internal predecessors, (30618), 9728 states have call successors, (9728), 3056 states have call predecessors, (9728), 3056 states have return successors, (11114), 9364 states have call predecessors, (11114), 9726 states have call successors, (11114) [2022-11-23 15:22:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35573 states to 35573 states and 51460 transitions. [2022-11-23 15:22:57,609 INFO L78 Accepts]: Start accepts. Automaton has 35573 states and 51460 transitions. Word has length 297 [2022-11-23 15:22:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:22:57,610 INFO L495 AbstractCegarLoop]: Abstraction has 35573 states and 51460 transitions. [2022-11-23 15:22:57,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 15:22:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 35573 states and 51460 transitions. [2022-11-23 15:22:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-11-23 15:22:57,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:22:57,641 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:22:57,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:22:57,642 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:22:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1529299845, now seen corresponding path program 1 times [2022-11-23 15:22:57,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:22:57,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251678532] [2022-11-23 15:22:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:22:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-11-23 15:22:58,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:58,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251678532] [2022-11-23 15:22:58,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251678532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:22:58,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:22:58,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:22:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203418612] [2022-11-23 15:22:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:22:58,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:22:58,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:22:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:22:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:22:58,270 INFO L87 Difference]: Start difference. First operand 35573 states and 51460 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-23 15:23:00,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:02,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:04,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:05,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:07,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:08,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:10,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:23:16,156 INFO L93 Difference]: Finished difference Result 94432 states and 136844 transitions. [2022-11-23 15:23:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:23:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 331 [2022-11-23 15:23:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:23:16,476 INFO L225 Difference]: With dead ends: 94432 [2022-11-23 15:23:16,476 INFO L226 Difference]: Without dead ends: 58919 [2022-11-23 15:23:16,686 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 [2022-11-23 15:23:16,687 INFO L413 NwaCegarLoop]: 3952 mSDtfsCounter, 2283 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2286 SdHoareTripleChecker+Valid, 6193 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:23:16,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2286 Valid, 6193 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 850 Invalid, 3 Unknown, 0 Unchecked, 15.6s Time] [2022-11-23 15:23:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58919 states. [2022-11-23 15:23:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58919 to 58610. [2022-11-23 15:23:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58610 states, 37541 states have (on average 1.3458884952451986) internal successors, (50526), 38470 states have internal predecessors, (50526), 16050 states have call successors, (16050), 5025 states have call predecessors, (16050), 5018 states have return successors, (18497), 15411 states have call predecessors, (18497), 16048 states have call successors, (18497) [2022-11-23 15:23:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58610 states to 58610 states and 85073 transitions. [2022-11-23 15:23:20,305 INFO L78 Accepts]: Start accepts. Automaton has 58610 states and 85073 transitions. Word has length 331 [2022-11-23 15:23:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:23:20,306 INFO L495 AbstractCegarLoop]: Abstraction has 58610 states and 85073 transitions. [2022-11-23 15:23:20,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-23 15:23:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 58610 states and 85073 transitions. [2022-11-23 15:23:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-11-23 15:23:20,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:23:20,389 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:23:20,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:23:20,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:23:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:23:20,390 INFO L85 PathProgramCache]: Analyzing trace with hash -397315652, now seen corresponding path program 1 times [2022-11-23 15:23:20,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:23:20,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578959128] [2022-11-23 15:23:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:20,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:23:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2022-11-23 15:23:21,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:23:21,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578959128] [2022-11-23 15:23:21,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578959128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:23:21,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:23:21,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:23:21,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454722667] [2022-11-23 15:23:21,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:23:21,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:23:21,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:21,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:23:21,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:23:21,781 INFO L87 Difference]: Start difference. First operand 58610 states and 85073 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-23 15:23:23,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:26,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:29,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:31,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:23:37,770 INFO L93 Difference]: Finished difference Result 116880 states and 169673 transitions. [2022-11-23 15:23:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:23:37,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 363 [2022-11-23 15:23:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:23:38,164 INFO L225 Difference]: With dead ends: 116880 [2022-11-23 15:23:38,164 INFO L226 Difference]: Without dead ends: 58631 [2022-11-23 15:23:38,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:23:38,452 INFO L413 NwaCegarLoop]: 2254 mSDtfsCounter, 8 mSDsluCounter, 4502 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6756 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:23:38,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 6756 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 937 Invalid, 2 Unknown, 0 Unchecked, 13.4s Time] [2022-11-23 15:23:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58631 states. [2022-11-23 15:23:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58631 to 58612. [2022-11-23 15:23:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58612 states, 37543 states have (on average 1.3454438910049809) internal successors, (50512), 38472 states have internal predecessors, (50512), 16050 states have call successors, (16050), 5025 states have call predecessors, (16050), 5018 states have return successors, (18497), 15411 states have call predecessors, (18497), 16048 states have call successors, (18497) [2022-11-23 15:23:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58612 states to 58612 states and 85059 transitions. [2022-11-23 15:23:42,133 INFO L78 Accepts]: Start accepts. Automaton has 58612 states and 85059 transitions. Word has length 363 [2022-11-23 15:23:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:23:42,133 INFO L495 AbstractCegarLoop]: Abstraction has 58612 states and 85059 transitions. [2022-11-23 15:23:42,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-23 15:23:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 58612 states and 85059 transitions. [2022-11-23 15:23:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-23 15:23:42,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:23:42,210 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:23:42,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:23:42,210 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:23:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:23:42,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1140982518, now seen corresponding path program 1 times [2022-11-23 15:23:42,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:23:42,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137986554] [2022-11-23 15:23:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:42,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:23:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1576 trivial. 0 not checked. [2022-11-23 15:23:43,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:23:43,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137986554] [2022-11-23 15:23:43,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137986554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:23:43,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:23:43,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:23:43,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963174464] [2022-11-23 15:23:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:23:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:23:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:23:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:23:43,189 INFO L87 Difference]: Start difference. First operand 58612 states and 85059 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-23 15:23:46,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:48,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:50,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:23:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:23:57,696 INFO L93 Difference]: Finished difference Result 120168 states and 174915 transitions. [2022-11-23 15:23:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:23:57,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 375 [2022-11-23 15:23:57,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:23:58,396 INFO L225 Difference]: With dead ends: 120168 [2022-11-23 15:23:58,396 INFO L226 Difference]: Without dead ends: 78560 [2022-11-23 15:23:58,570 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 [2022-11-23 15:23:58,571 INFO L413 NwaCegarLoop]: 2778 mSDtfsCounter, 2503 mSDsluCounter, 2195 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2503 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:23:58,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2503 Valid, 4973 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 648 Invalid, 1 Unknown, 0 Unchecked, 11.7s Time] [2022-11-23 15:23:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78560 states. [2022-11-23 15:24:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78560 to 78427. [2022-11-23 15:24:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78427 states, 50176 states have (on average 1.3447066326530612) internal successors, (67472), 51439 states have internal predecessors, (67472), 21496 states have call successors, (21496), 6759 states have call predecessors, (21496), 6754 states have return successors, (25206), 20626 states have call predecessors, (25206), 21494 states have call successors, (25206) [2022-11-23 15:24:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78427 states to 78427 states and 114174 transitions. [2022-11-23 15:24:02,167 INFO L78 Accepts]: Start accepts. Automaton has 78427 states and 114174 transitions. Word has length 375 [2022-11-23 15:24:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:02,168 INFO L495 AbstractCegarLoop]: Abstraction has 78427 states and 114174 transitions. [2022-11-23 15:24:02,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-23 15:24:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 78427 states and 114174 transitions. [2022-11-23 15:24:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-23 15:24:02,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:02,228 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:02,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:24:02,228 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1978071974, now seen corresponding path program 1 times [2022-11-23 15:24:02,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:02,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995485654] [2022-11-23 15:24:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2022-11-23 15:24:05,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:05,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995485654] [2022-11-23 15:24:05,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995485654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:05,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:05,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:24:05,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238645138] [2022-11-23 15:24:05,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:24:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:24:05,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:24:05,157 INFO L87 Difference]: Start difference. First operand 78427 states and 114174 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-23 15:24:07,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:09,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:12,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:13,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:20,229 INFO L93 Difference]: Finished difference Result 113297 states and 166345 transitions. [2022-11-23 15:24:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:24:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 375 [2022-11-23 15:24:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:20,899 INFO L225 Difference]: With dead ends: 113297 [2022-11-23 15:24:20,899 INFO L226 Difference]: Without dead ends: 78843 [2022-11-23 15:24:21,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:24:21,102 INFO L413 NwaCegarLoop]: 2258 mSDtfsCounter, 17 mSDsluCounter, 4483 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 6741 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:21,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 6741 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 948 Invalid, 2 Unknown, 0 Unchecked, 12.2s Time] [2022-11-23 15:24:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78843 states. [2022-11-23 15:24:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78843 to 78651. [2022-11-23 15:24:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78651 states, 50340 states have (on average 1.3435836313071117) internal successors, (67636), 51623 states have internal predecessors, (67636), 21536 states have call successors, (21536), 6759 states have call predecessors, (21536), 6774 states have return successors, (25278), 20666 states have call predecessors, (25278), 21534 states have call successors, (25278) [2022-11-23 15:24:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78651 states to 78651 states and 114450 transitions. [2022-11-23 15:24:24,476 INFO L78 Accepts]: Start accepts. Automaton has 78651 states and 114450 transitions. Word has length 375 [2022-11-23 15:24:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:24,477 INFO L495 AbstractCegarLoop]: Abstraction has 78651 states and 114450 transitions. [2022-11-23 15:24:24,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-23 15:24:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 78651 states and 114450 transitions. [2022-11-23 15:24:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-11-23 15:24:24,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:24,523 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:24,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:24:24,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash 844143992, now seen corresponding path program 1 times [2022-11-23 15:24:24,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:24,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661261012] [2022-11-23 15:24:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:24,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2022-11-23 15:24:25,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:25,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661261012] [2022-11-23 15:24:25,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661261012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:25,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:25,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:24:25,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460913609] [2022-11-23 15:24:25,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:25,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:24:25,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:25,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:24:25,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:24:25,455 INFO L87 Difference]: Start difference. First operand 78651 states and 114450 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2022-11-23 15:24:27,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:29,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:33,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []