./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 --- 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 03:15:51,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:15:51,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:15:51,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:15:51,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:15:51,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:15:51,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:15:51,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:15:51,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:15:51,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:15:51,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:15:51,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:15:51,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:15:51,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:15:51,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:15:51,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:15:51,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:15:51,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:15:51,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:15:51,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:15:51,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:15:51,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:15:51,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:15:51,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:15:51,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:15:51,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:15:51,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:15:51,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:15:51,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:15:51,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:15:51,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:15:51,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:15:51,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:15:51,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:15:51,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:15:51,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:15:51,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:15:51,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:15:51,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:15:51,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:15:51,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:15:51,748 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-23 03:15:51,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:15:51,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:15:51,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:15:51,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:15:51,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:15:51,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:15:51,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:15:51,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:15:51,793 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:15:51,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:15:51,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:15:51,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:15:51,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:15:51,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:15:51,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:15:51,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:15:51,795 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:15:51,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:15:51,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:15:51,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:15:51,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:15:51,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:15:51,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:15:51,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:15:51,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:15:51,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:15:51,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:15:51,798 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:15:51,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:15:51,798 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:15:51,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:15:51,799 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2022-11-23 03:15:52,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:15:52,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:15:52,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:15:52,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:15:52,085 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:15:52,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2022-11-23 03:15:55,311 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:15:55,958 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:15:55,958 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2022-11-23 03:15:55,993 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/data/b17f9fc94/9fd9a42e48314c0da8e39f307d8f30f9/FLAGb0ccf00f3 [2022-11-23 03:15:56,009 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/data/b17f9fc94/9fd9a42e48314c0da8e39f307d8f30f9 [2022-11-23 03:15:56,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:15:56,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:15:56,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:15:56,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:15:56,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:15:56,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:56" (1/1) ... [2022-11-23 03:15:56,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43298656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:56, skipping insertion in model container [2022-11-23 03:15:56,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:56" (1/1) ... [2022-11-23 03:15:56,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:15:56,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:15:58,521 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_bc4ac327-93a2-494f-b79c-57ae87345bfe/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2022-11-23 03:15:58,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:15:58,724 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:15:59,264 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_bc4ac327-93a2-494f-b79c-57ae87345bfe/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2022-11-23 03:15:59,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:15:59,469 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:15:59,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59 WrapperNode [2022-11-23 03:15:59,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:15:59,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:15:59,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:15:59,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:15:59,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:15:59,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:15:59,805 INFO L138 Inliner]: procedures = 373, calls = 2979, calls flagged for inlining = 172, calls inlined = 164, statements flattened = 5902 [2022-11-23 03:15:59,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:15:59,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:15:59,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:15:59,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:15:59,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:15:59,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:15:59,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:15:59,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:16:00,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:16:00,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:16:00,149 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:16:00,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:16:00,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:16:00,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:16:00,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:16:00,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:16:00,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (1/1) ... [2022-11-23 03:16:00,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:16:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:16:00,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:16:00,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:16:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure serial_break [2022-11-23 03:16:00,296 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_break [2022-11-23 03:16:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure serial_proc_open [2022-11-23 03:16:00,296 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_proc_open [2022-11-23 03:16:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_throttle [2022-11-23 03:16:00,297 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_throttle [2022-11-23 03:16:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2022-11-23 03:16:00,297 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2022-11-23 03:16:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-23 03:16:00,298 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-23 03:16:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-23 03:16:00,298 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-23 03:16:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-11-23 03:16:00,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-11-23 03:16:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2022-11-23 03:16:00,299 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2022-11-23 03:16:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2022-11-23 03:16:00,299 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2022-11-23 03:16:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2022-11-23 03:16:00,300 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2022-11-23 03:16:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2022-11-23 03:16:00,300 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2022-11-23 03:16:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2022-11-23 03:16:00,300 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2022-11-23 03:16:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2022-11-23 03:16:00,301 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2022-11-23 03:16:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2022-11-23 03:16:00,301 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2022-11-23 03:16:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 03:16:00,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 03:16:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2022-11-23 03:16:00,302 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2022-11-23 03:16:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2022-11-23 03:16:00,303 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2022-11-23 03:16:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2022-11-23 03:16:00,303 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2022-11-23 03:16:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2022-11-23 03:16:00,304 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2022-11-23 03:16:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 03:16:00,304 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 03:16:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-23 03:16:00,305 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-23 03:16:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 03:16:00,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 03:16:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2022-11-23 03:16:00,306 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2022-11-23 03:16:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure usb_store_new_id [2022-11-23 03:16:00,306 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_store_new_id [2022-11-23 03:16:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2022-11-23 03:16:00,306 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2022-11-23 03:16:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2022-11-23 03:16:00,307 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2022-11-23 03:16:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-23 03:16:00,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-23 03:16:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-23 03:16:00,308 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-23 03:16:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_get_by_index [2022-11-23 03:16:00,308 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_get_by_index [2022-11-23 03:16:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_poison_urbs [2022-11-23 03:16:00,309 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_poison_urbs [2022-11-23 03:16:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure serial_hangup [2022-11-23 03:16:00,309 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_hangup [2022-11-23 03:16:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2022-11-23 03:16:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2022-11-23 03:16:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2022-11-23 03:16:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2022-11-23 03:16:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2022-11-23 03:16:00,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2022-11-23 03:16:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-23 03:16:00,311 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-23 03:16:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2022-11-23 03:16:00,311 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2022-11-23 03:16:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2022-11-23 03:16:00,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2022-11-23 03:16:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 03:16:00,312 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 03:16:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:16:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-23 03:16:00,312 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-23 03:16:00,313 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2022-11-23 03:16:00,313 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2022-11-23 03:16:00,313 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unpoison_urb [2022-11-23 03:16:00,314 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unpoison_urb [2022-11-23 03:16:00,314 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2022-11-23 03:16:00,314 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2022-11-23 03:16:00,314 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2022-11-23 03:16:00,314 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2022-11-23 03:16:00,315 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2022-11-23 03:16:00,315 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2022-11-23 03:16:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value_probe [2022-11-23 03:16:00,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value_probe [2022-11-23 03:16:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 03:16:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 03:16:00,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 03:16:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-23 03:16:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2022-11-23 03:16:00,317 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2022-11-23 03:16:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2022-11-23 03:16:00,317 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2022-11-23 03:16:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 03:16:00,318 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 03:16:00,318 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2022-11-23 03:16:00,318 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2022-11-23 03:16:00,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:16:00,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 03:16:00,318 INFO L130 BoogieDeclarations]: Found specification of procedure try_module_get [2022-11-23 03:16:00,319 INFO L138 BoogieDeclarations]: Found implementation of procedure try_module_get [2022-11-23 03:16:00,319 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 03:16:00,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 03:16:00,319 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-23 03:16:00,319 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-23 03:16:00,320 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2022-11-23 03:16:00,320 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2022-11-23 03:16:00,320 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2022-11-23 03:16:00,320 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2022-11-23 03:16:00,320 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 03:16:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 03:16:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_resume [2022-11-23 03:16:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_resume [2022-11-23 03:16:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2022-11-23 03:16:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2022-11-23 03:16:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 03:16:00,326 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 03:16:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-23 03:16:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-23 03:16:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2022-11-23 03:16:00,329 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2022-11-23 03:16:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_uint_must_check_helper [2022-11-23 03:16:00,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_uint_must_check_helper [2022-11-23 03:16:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 03:16:00,335 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 03:16:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2022-11-23 03:16:00,335 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2022-11-23 03:16:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-23 03:16:00,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-23 03:16:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-23 03:16:00,336 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-23 03:16:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2022-11-23 03:16:00,337 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2022-11-23 03:16:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-23 03:16:00,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-23 03:16:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure bus_unregister [2022-11-23 03:16:00,337 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_unregister [2022-11-23 03:16:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2022-11-23 03:16:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2022-11-23 03:16:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2022-11-23 03:16:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2022-11-23 03:16:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2022-11-23 03:16:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2022-11-23 03:16:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2022-11-23 03:16:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2022-11-23 03:16:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2022-11-23 03:16:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2022-11-23 03:16:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:16:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2022-11-23 03:16:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2022-11-23 03:16:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-11-23 03:16:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-11-23 03:16:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 03:16:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 03:16:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_match [2022-11-23 03:16:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_match [2022-11-23 03:16:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure serial_open [2022-11-23 03:16:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_open [2022-11-23 03:16:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 03:16:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 03:16:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-23 03:16:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-23 03:16:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2022-11-23 03:16:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2022-11-23 03:16:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2022-11-23 03:16:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2022-11-23 03:16:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 03:16:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 03:16:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2022-11-23 03:16:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2022-11-23 03:16:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:16:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2022-11-23 03:16:00,343 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2022-11-23 03:16:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-23 03:16:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-23 03:16:00,343 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-23 03:16:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 03:16:00,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 03:16:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2022-11-23 03:16:00,344 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2022-11-23 03:16:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2022-11-23 03:16:00,344 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2022-11-23 03:16:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2022-11-23 03:16:00,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2022-11-23 03:16:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:16:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure serial_install [2022-11-23 03:16:00,346 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_install [2022-11-23 03:16:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:16:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 03:16:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 03:16:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 03:16:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 03:16:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-23 03:16:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-23 03:16:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2022-11-23 03:16:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2022-11-23 03:16:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_table_lock [2022-11-23 03:16:00,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_table_lock [2022-11-23 03:16:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-23 03:16:00,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-23 03:16:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2022-11-23 03:16:00,348 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2022-11-23 03:16:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_table_lock [2022-11-23 03:16:00,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_table_lock [2022-11-23 03:16:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-23 03:16:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-23 03:16:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2022-11-23 03:16:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2022-11-23 03:16:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_unpoison_port_urbs [2022-11-23 03:16:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_unpoison_port_urbs [2022-11-23 03:16:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 03:16:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 03:16:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2022-11-23 03:16:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2022-11-23 03:16:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 03:16:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 03:16:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2022-11-23 03:16:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2022-11-23 03:16:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 03:16:00,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 03:16:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure get_iface_id [2022-11-23 03:16:00,351 INFO L138 BoogieDeclarations]: Found implementation of procedure get_iface_id [2022-11-23 03:16:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 03:16:00,351 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 03:16:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:16:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-23 03:16:00,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-23 03:16:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:16:00,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:16:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2022-11-23 03:16:00,352 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2022-11-23 03:16:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2022-11-23 03:16:00,352 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2022-11-23 03:16:01,257 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:16:01,261 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:16:12,321 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:16:12,338 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:16:12,338 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 03:16:12,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:12 BoogieIcfgContainer [2022-11-23 03:16:12,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:16:12,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:16:12,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:16:12,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:16:12,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:15:56" (1/3) ... [2022-11-23 03:16:12,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4853ab1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:12, skipping insertion in model container [2022-11-23 03:16:12,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:59" (2/3) ... [2022-11-23 03:16:12,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4853ab1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:12, skipping insertion in model container [2022-11-23 03:16:12,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:12" (3/3) ... [2022-11-23 03:16:12,352 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2022-11-23 03:16:12,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:16:12,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:16:12,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:16:12,490 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=PETRI_NET, 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;@4ab64640, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:16:12,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 03:16:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1264 states have (on average 1.307753164556962) internal successors, (1653), 1298 states have internal predecessors, (1653), 452 states have call successors, (452), 112 states have call predecessors, (452), 112 states have return successors, (452), 438 states have call predecessors, (452), 452 states have call successors, (452) [2022-11-23 03:16:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 03:16:12,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:16:12,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 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 03:16:12,511 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:16:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2025966826, now seen corresponding path program 1 times [2022-11-23 03:16:12,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:12,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469809140] [2022-11-23 03:16:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:12,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:13,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:16:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:13,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:16:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:13,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:16:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:13,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:16:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:13,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:13,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469809140] [2022-11-23 03:16:13,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469809140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:13,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:13,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:16:13,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298198727] [2022-11-23 03:16:13,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:13,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:16:13,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:16:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:16:13,469 INFO L87 Difference]: Start difference. First operand has 1830 states, 1264 states have (on average 1.307753164556962) internal successors, (1653), 1298 states have internal predecessors, (1653), 452 states have call successors, (452), 112 states have call predecessors, (452), 112 states have return successors, (452), 438 states have call predecessors, (452), 452 states have call successors, (452) Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:16:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:16:32,044 INFO L93 Difference]: Finished difference Result 5877 states and 8676 transitions. [2022-11-23 03:16:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:16:32,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-11-23 03:16:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:16:32,112 INFO L225 Difference]: With dead ends: 5877 [2022-11-23 03:16:32,112 INFO L226 Difference]: Without dead ends: 4050 [2022-11-23 03:16:32,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:16:32,140 INFO L413 NwaCegarLoop]: 1246 mSDtfsCounter, 5547 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 6343 mSolverCounterSat, 3069 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5862 SdHoareTripleChecker+Valid, 2866 SdHoareTripleChecker+Invalid, 9412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3069 IncrementalHoareTripleChecker+Valid, 6343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:16:32,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5862 Valid, 2866 Invalid, 9412 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3069 Valid, 6343 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2022-11-23 03:16:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2022-11-23 03:16:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 3519. [2022-11-23 03:16:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 2439 states have (on average 1.2947929479294793) internal successors, (3158), 2496 states have internal predecessors, (3158), 839 states have call successors, (839), 220 states have call predecessors, (839), 240 states have return successors, (942), 821 states have call predecessors, (942), 823 states have call successors, (942) [2022-11-23 03:16:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 4939 transitions. [2022-11-23 03:16:32,557 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 4939 transitions. Word has length 32 [2022-11-23 03:16:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:16:32,560 INFO L495 AbstractCegarLoop]: Abstraction has 3519 states and 4939 transitions. [2022-11-23 03:16:32,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:16:32,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 4939 transitions. [2022-11-23 03:16:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 03:16:32,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:16:32,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:16:32,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:16:32,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:16:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:32,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1621419543, now seen corresponding path program 1 times [2022-11-23 03:16:32,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:32,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96549082] [2022-11-23 03:16:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:32,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:32,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:16:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:32,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:16:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:32,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:16:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:33,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:16:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:33,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:33,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96549082] [2022-11-23 03:16:33,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96549082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:33,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:33,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:16:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000328666] [2022-11-23 03:16:33,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:33,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:16:33,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:33,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:16:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:16:33,019 INFO L87 Difference]: Start difference. First operand 3519 states and 4939 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:16:43,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:16:43,779 INFO L93 Difference]: Finished difference Result 4118 states and 5910 transitions. [2022-11-23 03:16:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:16:43,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-11-23 03:16:43,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:16:43,812 INFO L225 Difference]: With dead ends: 4118 [2022-11-23 03:16:43,812 INFO L226 Difference]: Without dead ends: 4115 [2022-11-23 03:16:43,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:16:43,817 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 3997 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 3592 mSolverCounterSat, 2067 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4229 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 5659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2067 IncrementalHoareTripleChecker+Valid, 3592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:16:43,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4229 Valid, 1821 Invalid, 5659 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2067 Valid, 3592 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-23 03:16:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2022-11-23 03:16:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 3518. [2022-11-23 03:16:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 2439 states have (on average 1.2943829438294383) internal successors, (3157), 2495 states have internal predecessors, (3157), 838 states have call successors, (838), 220 states have call predecessors, (838), 240 states have return successors, (942), 821 states have call predecessors, (942), 823 states have call successors, (942) [2022-11-23 03:16:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 4937 transitions. [2022-11-23 03:16:44,085 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 4937 transitions. Word has length 33 [2022-11-23 03:16:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:16:44,086 INFO L495 AbstractCegarLoop]: Abstraction has 3518 states and 4937 transitions. [2022-11-23 03:16:44,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:16:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 4937 transitions. [2022-11-23 03:16:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 03:16:44,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:16:44,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:16:44,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:16:44,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:16:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:44,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1273724877, now seen corresponding path program 1 times [2022-11-23 03:16:44,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:44,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883511446] [2022-11-23 03:16:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:44,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:44,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:16:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:44,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:16:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:16:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:44,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:16:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:44,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883511446] [2022-11-23 03:16:44,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883511446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:44,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:44,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:16:44,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789969692] [2022-11-23 03:16:44,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:44,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:16:44,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:16:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:16:44,576 INFO L87 Difference]: Start difference. First operand 3518 states and 4937 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:16:51,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:16:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:16:55,256 INFO L93 Difference]: Finished difference Result 4117 states and 5908 transitions. [2022-11-23 03:16:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:16:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-11-23 03:16:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:16:55,290 INFO L225 Difference]: With dead ends: 4117 [2022-11-23 03:16:55,290 INFO L226 Difference]: Without dead ends: 4114 [2022-11-23 03:16:55,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:16:55,296 INFO L413 NwaCegarLoop]: 927 mSDtfsCounter, 3995 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 3590 mSolverCounterSat, 2057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4225 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 5647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2057 IncrementalHoareTripleChecker+Valid, 3590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:16:55,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4225 Valid, 1820 Invalid, 5647 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2057 Valid, 3590 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-11-23 03:16:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2022-11-23 03:16:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 3517. [2022-11-23 03:16:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3517 states, 2439 states have (on average 1.2939729397293973) internal successors, (3156), 2494 states have internal predecessors, (3156), 837 states have call successors, (837), 220 states have call predecessors, (837), 240 states have return successors, (942), 821 states have call predecessors, (942), 823 states have call successors, (942) [2022-11-23 03:16:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3517 states to 3517 states and 4935 transitions. [2022-11-23 03:16:55,682 INFO L78 Accepts]: Start accepts. Automaton has 3517 states and 4935 transitions. Word has length 34 [2022-11-23 03:16:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:16:55,683 INFO L495 AbstractCegarLoop]: Abstraction has 3517 states and 4935 transitions. [2022-11-23 03:16:55,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:16:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3517 states and 4935 transitions. [2022-11-23 03:16:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 03:16:55,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:16:55,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:16:55,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:16:55,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:16:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:55,688 INFO L85 PathProgramCache]: Analyzing trace with hash 828893548, now seen corresponding path program 1 times [2022-11-23 03:16:55,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:55,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58443357] [2022-11-23 03:16:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:55,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:56,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:16:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:56,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:16:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:56,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:16:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:56,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:16:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:56,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:56,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58443357] [2022-11-23 03:16:56,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58443357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:56,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:56,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:16:56,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332308841] [2022-11-23 03:16:56,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:56,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:16:56,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:56,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:16:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:16:56,109 INFO L87 Difference]: Start difference. First operand 3517 states and 4935 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:17:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:17:08,082 INFO L93 Difference]: Finished difference Result 4254 states and 6049 transitions. [2022-11-23 03:17:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:17:08,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-23 03:17:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:17:08,113 INFO L225 Difference]: With dead ends: 4254 [2022-11-23 03:17:08,113 INFO L226 Difference]: Without dead ends: 4235 [2022-11-23 03:17:08,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:17:08,118 INFO L413 NwaCegarLoop]: 944 mSDtfsCounter, 3911 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 3835 mSolverCounterSat, 2008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 5843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2008 IncrementalHoareTripleChecker+Valid, 3835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:17:08,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4119 Valid, 1912 Invalid, 5843 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2008 Valid, 3835 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-11-23 03:17:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2022-11-23 03:17:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3630. [2022-11-23 03:17:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 2527 states have (on average 1.2880886426592797) internal successors, (3255), 2579 states have internal predecessors, (3255), 840 states have call successors, (840), 242 states have call predecessors, (840), 262 states have return successors, (948), 827 states have call predecessors, (948), 829 states have call successors, (948) [2022-11-23 03:17:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 5043 transitions. [2022-11-23 03:17:08,540 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 5043 transitions. Word has length 35 [2022-11-23 03:17:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:17:08,543 INFO L495 AbstractCegarLoop]: Abstraction has 3630 states and 5043 transitions. [2022-11-23 03:17:08,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:17:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 5043 transitions. [2022-11-23 03:17:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 03:17:08,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:17:08,567 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 03:17:08,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:17:08,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:17:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash -706205600, now seen corresponding path program 1 times [2022-11-23 03:17:08,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:08,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883733327] [2022-11-23 03:17:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:09,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:17:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:09,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:17:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:09,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:17:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:09,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:17:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:09,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-23 03:17:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-23 03:17:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:09,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-23 03:17:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:17:09,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:17:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883733327] [2022-11-23 03:17:09,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883733327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:17:09,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:17:09,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 03:17:09,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610937290] [2022-11-23 03:17:09,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:17:09,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:17:09,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:17:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:17:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:17:09,123 INFO L87 Difference]: Start difference. First operand 3630 states and 5043 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 03:17:18,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:17:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:17:26,454 INFO L93 Difference]: Finished difference Result 8404 states and 11993 transitions. [2022-11-23 03:17:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:17:26,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2022-11-23 03:17:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:17:26,495 INFO L225 Difference]: With dead ends: 8404 [2022-11-23 03:17:26,496 INFO L226 Difference]: Without dead ends: 4932 [2022-11-23 03:17:26,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:17:26,521 INFO L413 NwaCegarLoop]: 1121 mSDtfsCounter, 3334 mSDsluCounter, 3199 mSDsCounter, 0 mSdLazyCounter, 7196 mSolverCounterSat, 2308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 4320 SdHoareTripleChecker+Invalid, 9504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2308 IncrementalHoareTripleChecker+Valid, 7196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:17:26,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3560 Valid, 4320 Invalid, 9504 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2308 Valid, 7196 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2022-11-23 03:17:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2022-11-23 03:17:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4234. [2022-11-23 03:17:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 2982 states have (on average 1.2977867203219315) internal successors, (3870), 3025 states have internal predecessors, (3870), 975 states have call successors, (975), 242 states have call predecessors, (975), 276 states have return successors, (1133), 985 states have call predecessors, (1133), 964 states have call successors, (1133) [2022-11-23 03:17:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 5978 transitions. [2022-11-23 03:17:27,035 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 5978 transitions. Word has length 58 [2022-11-23 03:17:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:17:27,036 INFO L495 AbstractCegarLoop]: Abstraction has 4234 states and 5978 transitions. [2022-11-23 03:17:27,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 03:17:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 5978 transitions. [2022-11-23 03:17:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 03:17:27,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:17:27,044 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 03:17:27,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:17:27,045 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:17:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2035486617, now seen corresponding path program 1 times [2022-11-23 03:17:27,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:27,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424797193] [2022-11-23 03:17:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:27,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:27,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:17:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:27,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:17:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:27,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:17:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:27,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:17:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:27,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-23 03:17:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:27,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-23 03:17:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:27,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-23 03:17:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:27,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-23 03:17:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:17:27,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:17:27,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424797193] [2022-11-23 03:17:27,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424797193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:17:27,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:17:27,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 03:17:27,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438047438] [2022-11-23 03:17:27,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:17:27,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:17:27,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:17:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:17:27,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:17:27,587 INFO L87 Difference]: Start difference. First operand 4234 states and 5978 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 03:17:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:17:39,083 INFO L93 Difference]: Finished difference Result 9149 states and 13124 transitions. [2022-11-23 03:17:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:17:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-23 03:17:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:17:39,114 INFO L225 Difference]: With dead ends: 9149 [2022-11-23 03:17:39,114 INFO L226 Difference]: Without dead ends: 4934 [2022-11-23 03:17:39,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:17:39,135 INFO L413 NwaCegarLoop]: 1115 mSDtfsCounter, 2291 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 5853 mSolverCounterSat, 1475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 3679 SdHoareTripleChecker+Invalid, 7328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1475 IncrementalHoareTripleChecker+Valid, 5853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-23 03:17:39,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2516 Valid, 3679 Invalid, 7328 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1475 Valid, 5853 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-11-23 03:17:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4934 states. [2022-11-23 03:17:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4934 to 4235. [2022-11-23 03:17:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4235 states, 2983 states have (on average 1.2976868923902112) internal successors, (3871), 3026 states have internal predecessors, (3871), 975 states have call successors, (975), 242 states have call predecessors, (975), 276 states have return successors, (1133), 985 states have call predecessors, (1133), 964 states have call successors, (1133) [2022-11-23 03:17:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4235 states to 4235 states and 5979 transitions. [2022-11-23 03:17:39,487 INFO L78 Accepts]: Start accepts. Automaton has 4235 states and 5979 transitions. Word has length 67 [2022-11-23 03:17:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:17:39,487 INFO L495 AbstractCegarLoop]: Abstraction has 4235 states and 5979 transitions. [2022-11-23 03:17:39,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 03:17:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4235 states and 5979 transitions. [2022-11-23 03:17:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 03:17:39,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:17:39,491 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 03:17:39,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:17:39,492 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:17:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:39,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1310542805, now seen corresponding path program 1 times [2022-11-23 03:17:39,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:39,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566943292] [2022-11-23 03:17:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:39,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:17:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:39,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:17:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:39,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:17:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:39,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:17:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:39,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-23 03:17:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:39,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-23 03:17:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-23 03:17:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:39,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-23 03:17:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:17:39,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:17:39,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566943292] [2022-11-23 03:17:39,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566943292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:17:39,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618845229] [2022-11-23 03:17:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:39,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:17:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:17:40,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:17:40,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:17:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:17:41,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:17:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:17:41,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:17:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:17:41,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618845229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:17:41,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:17:41,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-11-23 03:17:41,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843569588] [2022-11-23 03:17:41,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:17:41,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:17:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:17:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:17:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:17:41,197 INFO L87 Difference]: Start difference. First operand 4235 states and 5979 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:17:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:17:55,008 INFO L93 Difference]: Finished difference Result 9154 states and 13131 transitions. [2022-11-23 03:17:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:17:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2022-11-23 03:17:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:17:55,043 INFO L225 Difference]: With dead ends: 9154 [2022-11-23 03:17:55,043 INFO L226 Difference]: Without dead ends: 4939 [2022-11-23 03:17:55,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:17:55,069 INFO L413 NwaCegarLoop]: 1119 mSDtfsCounter, 3341 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 7192 mSolverCounterSat, 2321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3567 SdHoareTripleChecker+Valid, 4311 SdHoareTripleChecker+Invalid, 9513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2321 IncrementalHoareTripleChecker+Valid, 7192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:17:55,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3567 Valid, 4311 Invalid, 9513 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2321 Valid, 7192 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-11-23 03:17:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2022-11-23 03:17:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4241. [2022-11-23 03:17:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4241 states, 2989 states have (on average 1.2970893275342925) internal successors, (3877), 3032 states have internal predecessors, (3877), 975 states have call successors, (975), 242 states have call predecessors, (975), 276 states have return successors, (1133), 985 states have call predecessors, (1133), 964 states have call successors, (1133) [2022-11-23 03:17:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4241 states to 4241 states and 5985 transitions. [2022-11-23 03:17:55,500 INFO L78 Accepts]: Start accepts. Automaton has 4241 states and 5985 transitions. Word has length 69 [2022-11-23 03:17:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:17:55,501 INFO L495 AbstractCegarLoop]: Abstraction has 4241 states and 5985 transitions. [2022-11-23 03:17:55,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:17:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4241 states and 5985 transitions. [2022-11-23 03:17:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 03:17:55,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:17:55,505 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-23 03:17:55,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:17:55,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 03:17:55,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:17:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1157216631, now seen corresponding path program 2 times [2022-11-23 03:17:55,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:55,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125180153] [2022-11-23 03:17:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:55,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:56,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:17:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:56,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:17:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:56,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:17:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:56,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:17:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:56,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-23 03:17:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:56,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-23 03:17:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:56,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-23 03:17:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:56,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-23 03:17:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 03:17:56,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:17:56,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125180153] [2022-11-23 03:17:56,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125180153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:17:56,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:17:56,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 03:17:56,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180727353] [2022-11-23 03:17:56,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:17:56,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:17:56,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:17:56,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:17:56,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:17:56,232 INFO L87 Difference]: Start difference. First operand 4241 states and 5985 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 03:18:13,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:18:13,482 INFO L93 Difference]: Finished difference Result 9209 states and 13297 transitions. [2022-11-23 03:18:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:18:13,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2022-11-23 03:18:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:18:13,510 INFO L225 Difference]: With dead ends: 9209 [2022-11-23 03:18:13,510 INFO L226 Difference]: Without dead ends: 5135 [2022-11-23 03:18:13,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:18:13,532 INFO L413 NwaCegarLoop]: 1389 mSDtfsCounter, 6086 mSDsluCounter, 2677 mSDsCounter, 0 mSdLazyCounter, 8234 mSolverCounterSat, 4330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6409 SdHoareTripleChecker+Valid, 4066 SdHoareTripleChecker+Invalid, 12564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4330 IncrementalHoareTripleChecker+Valid, 8234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:18:13,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6409 Valid, 4066 Invalid, 12564 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4330 Valid, 8234 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time] [2022-11-23 03:18:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5135 states. [2022-11-23 03:18:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5135 to 4162. [2022-11-23 03:18:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 2929 states have (on average 1.300785250938887) internal successors, (3810), 2982 states have internal predecessors, (3810), 969 states have call successors, (969), 241 states have call predecessors, (969), 263 states have return successors, (1040), 957 states have call predecessors, (1040), 948 states have call successors, (1040) [2022-11-23 03:18:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 5819 transitions. [2022-11-23 03:18:14,002 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 5819 transitions. Word has length 75 [2022-11-23 03:18:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:18:14,003 INFO L495 AbstractCegarLoop]: Abstraction has 4162 states and 5819 transitions. [2022-11-23 03:18:14,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 03:18:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 5819 transitions. [2022-11-23 03:18:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 03:18:14,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:18:14,006 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-23 03:18:14,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:18:14,007 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:18:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:18:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1090370402, now seen corresponding path program 1 times [2022-11-23 03:18:14,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:18:14,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243690503] [2022-11-23 03:18:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:18:14,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:18:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:14,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:18:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:14,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:18:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:14,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:18:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:14,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:18:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:14,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-23 03:18:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:14,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-23 03:18:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:14,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-23 03:18:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:14,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-23 03:18:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:18:14,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:18:14,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243690503] [2022-11-23 03:18:14,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243690503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:18:14,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394647936] [2022-11-23 03:18:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:18:14,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:18:14,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:18:14,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:18:14,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:18:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:15,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 3155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:18:15,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:18:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:18:15,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:18:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:18:15,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394647936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:18:15,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:18:15,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2022-11-23 03:18:15,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845343193] [2022-11-23 03:18:15,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:18:15,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:18:15,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:18:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:18:15,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:18:15,871 INFO L87 Difference]: Start difference. First operand 4162 states and 5819 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:18:25,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:18:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:18:33,403 INFO L93 Difference]: Finished difference Result 9278 states and 13207 transitions. [2022-11-23 03:18:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 03:18:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 79 [2022-11-23 03:18:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:18:33,433 INFO L225 Difference]: With dead ends: 9278 [2022-11-23 03:18:33,433 INFO L226 Difference]: Without dead ends: 5142 [2022-11-23 03:18:33,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:18:33,450 INFO L413 NwaCegarLoop]: 1120 mSDtfsCounter, 3348 mSDsluCounter, 5002 mSDsCounter, 0 mSdLazyCounter, 10823 mSolverCounterSat, 2324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3573 SdHoareTripleChecker+Valid, 6122 SdHoareTripleChecker+Invalid, 13147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2324 IncrementalHoareTripleChecker+Valid, 10823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-23 03:18:33,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3573 Valid, 6122 Invalid, 13147 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2324 Valid, 10823 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time] [2022-11-23 03:18:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5142 states. [2022-11-23 03:18:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5142 to 4174. [2022-11-23 03:18:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4174 states, 2941 states have (on average 1.2995579734784086) internal successors, (3822), 2994 states have internal predecessors, (3822), 969 states have call successors, (969), 241 states have call predecessors, (969), 263 states have return successors, (1040), 957 states have call predecessors, (1040), 948 states have call successors, (1040) [2022-11-23 03:18:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4174 states to 4174 states and 5831 transitions. [2022-11-23 03:18:33,886 INFO L78 Accepts]: Start accepts. Automaton has 4174 states and 5831 transitions. Word has length 79 [2022-11-23 03:18:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:18:33,887 INFO L495 AbstractCegarLoop]: Abstraction has 4174 states and 5831 transitions. [2022-11-23 03:18:33,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:18:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4174 states and 5831 transitions. [2022-11-23 03:18:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-23 03:18:33,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:18:33,896 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 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] [2022-11-23 03:18:33,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:18:34,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 03:18:34,109 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:18:34,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:18:34,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1752006918, now seen corresponding path program 2 times [2022-11-23 03:18:34,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:18:34,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052318114] [2022-11-23 03:18:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:18:34,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:18:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:34,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:18:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:34,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:18:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:35,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:18:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:35,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:18:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:35,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-23 03:18:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:35,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-23 03:18:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:35,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-23 03:18:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:35,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-23 03:18:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:18:35,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:18:35,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052318114] [2022-11-23 03:18:35,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052318114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:18:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339821671] [2022-11-23 03:18:35,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:18:35,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:18:35,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:18:35,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:18:35,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:18:36,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:18:36,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:18:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 3245 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:18:36,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:18:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:18:36,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:18:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:18:37,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339821671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:18:37,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:18:37,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 28 [2022-11-23 03:18:37,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408241749] [2022-11-23 03:18:37,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:18:37,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 03:18:37,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:18:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 03:18:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2022-11-23 03:18:37,369 INFO L87 Difference]: Start difference. First operand 4174 states and 5831 transitions. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 25 states have internal predecessors, (103), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:18:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:18:53,705 INFO L93 Difference]: Finished difference Result 9302 states and 13237 transitions. [2022-11-23 03:18:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 03:18:53,706 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 25 states have internal predecessors, (103), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 91 [2022-11-23 03:18:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:18:53,729 INFO L225 Difference]: With dead ends: 9302 [2022-11-23 03:18:53,729 INFO L226 Difference]: Without dead ends: 5166 [2022-11-23 03:18:53,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2022-11-23 03:18:53,744 INFO L413 NwaCegarLoop]: 1121 mSDtfsCounter, 2322 mSDsluCounter, 4372 mSDsCounter, 0 mSdLazyCounter, 9480 mSolverCounterSat, 1491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2551 SdHoareTripleChecker+Valid, 5493 SdHoareTripleChecker+Invalid, 10971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1491 IncrementalHoareTripleChecker+Valid, 9480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:18:53,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2551 Valid, 5493 Invalid, 10971 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1491 Valid, 9480 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2022-11-23 03:18:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2022-11-23 03:18:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4198. [2022-11-23 03:18:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 2965 states have (on average 1.2971332209106239) internal successors, (3846), 3018 states have internal predecessors, (3846), 969 states have call successors, (969), 241 states have call predecessors, (969), 263 states have return successors, (1040), 957 states have call predecessors, (1040), 948 states have call successors, (1040) [2022-11-23 03:18:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5855 transitions. [2022-11-23 03:18:54,102 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5855 transitions. Word has length 91 [2022-11-23 03:18:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:18:54,103 INFO L495 AbstractCegarLoop]: Abstraction has 4198 states and 5855 transitions. [2022-11-23 03:18:54,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 25 states have internal predecessors, (103), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:18:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5855 transitions. [2022-11-23 03:18:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 03:18:54,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:18:54,107 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 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] [2022-11-23 03:18:54,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:18:54,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:18:54,320 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:18:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:18:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1037048362, now seen corresponding path program 3 times [2022-11-23 03:18:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:18:54,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805260919] [2022-11-23 03:18:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:18:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:18:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:56,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:18:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:56,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:18:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:18:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:56,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:18:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:56,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-23 03:18:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:56,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-23 03:18:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:56,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-23 03:18:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:56,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-23 03:18:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:18:56,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:18:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805260919] [2022-11-23 03:18:56,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805260919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:18:56,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639412576] [2022-11-23 03:18:56,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:18:56,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:18:56,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:18:56,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:18:56,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:18:58,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:18:58,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:18:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:18:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:18:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-11-23 03:18:58,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:18:58,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639412576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:18:58,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:18:58,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 31 [2022-11-23 03:18:58,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745377446] [2022-11-23 03:18:58,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:18:58,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:18:58,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:18:58,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:18:58,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2022-11-23 03:18:58,542 INFO L87 Difference]: Start difference. First operand 4198 states and 5855 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 03:19:00,568 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 03:19:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:19:01,026 INFO L93 Difference]: Finished difference Result 8195 states and 11450 transitions. [2022-11-23 03:19:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:19:01,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 115 [2022-11-23 03:19:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:19:01,053 INFO L225 Difference]: With dead ends: 8195 [2022-11-23 03:19:01,054 INFO L226 Difference]: Without dead ends: 4182 [2022-11-23 03:19:01,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 03:19:01,069 INFO L413 NwaCegarLoop]: 2525 mSDtfsCounter, 4 mSDsluCounter, 7553 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10078 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:19:01,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10078 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 03:19:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2022-11-23 03:19:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 4182. [2022-11-23 03:19:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4182 states, 2956 states have (on average 1.2966847090663058) internal successors, (3833), 3007 states have internal predecessors, (3833), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2022-11-23 03:19:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4182 states to 4182 states and 5834 transitions. [2022-11-23 03:19:01,499 INFO L78 Accepts]: Start accepts. Automaton has 4182 states and 5834 transitions. Word has length 115 [2022-11-23 03:19:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:19:01,500 INFO L495 AbstractCegarLoop]: Abstraction has 4182 states and 5834 transitions. [2022-11-23 03:19:01,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 03:19:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4182 states and 5834 transitions. [2022-11-23 03:19:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-23 03:19:01,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:19:01,505 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 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] [2022-11-23 03:19:01,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:19:01,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:19:01,719 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:19:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:19:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash -820632570, now seen corresponding path program 1 times [2022-11-23 03:19:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:19:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290670655] [2022-11-23 03:19:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:19:01,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:19:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:19:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:19:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:19:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:19:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-23 03:19:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-23 03:19:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:19:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:19:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-23 03:19:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-23 03:19:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-23 03:19:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:19:04,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:19:04,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290670655] [2022-11-23 03:19:04,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290670655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:19:04,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027228326] [2022-11-23 03:19:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:19:04,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:19:04,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:19:04,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:19:04,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:19:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:05,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 4291 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 03:19:05,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:19:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 6 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:19:05,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:19:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:19:07,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027228326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:19:07,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:19:07,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 52 [2022-11-23 03:19:07,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847212987] [2022-11-23 03:19:07,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:19:07,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-23 03:19:07,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:19:07,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-23 03:19:07,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1183, Invalid=1469, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 03:19:07,218 INFO L87 Difference]: Start difference. First operand 4182 states and 5834 transitions. Second operand has 52 states, 52 states have (on average 3.423076923076923) internal successors, (178), 49 states have internal predecessors, (178), 2 states have call successors, (28), 5 states have call predecessors, (28), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 03:19:16,362 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 03:19:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:19:23,322 INFO L93 Difference]: Finished difference Result 9318 states and 13255 transitions. [2022-11-23 03:19:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-23 03:19:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.423076923076923) internal successors, (178), 49 states have internal predecessors, (178), 2 states have call successors, (28), 5 states have call predecessors, (28), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 139 [2022-11-23 03:19:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:19:23,344 INFO L225 Difference]: With dead ends: 9318 [2022-11-23 03:19:23,345 INFO L226 Difference]: Without dead ends: 5198 [2022-11-23 03:19:23,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1193, Invalid=1669, Unknown=0, NotChecked=0, Total=2862 [2022-11-23 03:19:23,358 INFO L413 NwaCegarLoop]: 1100 mSDtfsCounter, 2359 mSDsluCounter, 3410 mSDsCounter, 0 mSdLazyCounter, 7724 mSolverCounterSat, 1497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2583 SdHoareTripleChecker+Valid, 4510 SdHoareTripleChecker+Invalid, 9221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1497 IncrementalHoareTripleChecker+Valid, 7724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:19:23,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2583 Valid, 4510 Invalid, 9221 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1497 Valid, 7724 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2022-11-23 03:19:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2022-11-23 03:19:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 4230. [2022-11-23 03:19:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4230 states, 3004 states have (on average 1.2919440745672437) internal successors, (3881), 3055 states have internal predecessors, (3881), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2022-11-23 03:19:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 5882 transitions. [2022-11-23 03:19:23,684 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 5882 transitions. Word has length 139 [2022-11-23 03:19:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:19:23,685 INFO L495 AbstractCegarLoop]: Abstraction has 4230 states and 5882 transitions. [2022-11-23 03:19:23,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.423076923076923) internal successors, (178), 49 states have internal predecessors, (178), 2 states have call successors, (28), 5 states have call predecessors, (28), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 03:19:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 5882 transitions. [2022-11-23 03:19:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-23 03:19:23,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:19:23,690 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 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] [2022-11-23 03:19:23,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:19:23,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 03:19:23,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:19:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:19:23,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1716221338, now seen corresponding path program 2 times [2022-11-23 03:19:23,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:19:23,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084179505] [2022-11-23 03:19:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:19:23,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:19:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:19:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:19:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:19:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:19:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-23 03:19:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-23 03:19:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:19:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:19:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-11-23 03:19:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-11-23 03:19:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-11-23 03:19:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:19:29,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:19:29,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084179505] [2022-11-23 03:19:29,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084179505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:19:29,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412610542] [2022-11-23 03:19:29,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:19:29,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:19:29,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:19:29,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:19:29,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:19:31,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:19:31,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:19:31,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 4651 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 03:19:31,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:19:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 6 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:19:31,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:19:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:19:36,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412610542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:19:36,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:19:36,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 100 [2022-11-23 03:19:36,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555597169] [2022-11-23 03:19:36,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:19:36,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-23 03:19:36,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:19:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-23 03:19:36,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4663, Invalid=5237, Unknown=0, NotChecked=0, Total=9900 [2022-11-23 03:19:36,705 INFO L87 Difference]: Start difference. First operand 4230 states and 5882 transitions. Second operand has 100 states, 100 states have (on average 2.74) internal successors, (274), 97 states have internal predecessors, (274), 2 states have call successors, (28), 5 states have call predecessors, (28), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 03:19:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:19:54,844 INFO L93 Difference]: Finished difference Result 9414 states and 13375 transitions. [2022-11-23 03:19:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-23 03:19:54,845 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.74) internal successors, (274), 97 states have internal predecessors, (274), 2 states have call successors, (28), 5 states have call predecessors, (28), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 187 [2022-11-23 03:19:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:19:54,871 INFO L225 Difference]: With dead ends: 9414 [2022-11-23 03:19:54,871 INFO L226 Difference]: Without dead ends: 5294 [2022-11-23 03:19:54,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4673, Invalid=5629, Unknown=0, NotChecked=0, Total=10302 [2022-11-23 03:19:54,889 INFO L413 NwaCegarLoop]: 1102 mSDtfsCounter, 3476 mSDsluCounter, 4969 mSDsCounter, 0 mSdLazyCounter, 10902 mSolverCounterSat, 2355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3704 SdHoareTripleChecker+Valid, 6071 SdHoareTripleChecker+Invalid, 13257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2355 IncrementalHoareTripleChecker+Valid, 10902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-11-23 03:19:54,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3704 Valid, 6071 Invalid, 13257 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2355 Valid, 10902 Invalid, 0 Unknown, 0 Unchecked, 16.8s Time] [2022-11-23 03:19:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5294 states. [2022-11-23 03:19:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5294 to 4326. [2022-11-23 03:19:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 3100 states have (on average 1.2829032258064517) internal successors, (3977), 3151 states have internal predecessors, (3977), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2022-11-23 03:19:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 5978 transitions. [2022-11-23 03:19:55,265 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 5978 transitions. Word has length 187 [2022-11-23 03:19:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:19:55,265 INFO L495 AbstractCegarLoop]: Abstraction has 4326 states and 5978 transitions. [2022-11-23 03:19:55,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.74) internal successors, (274), 97 states have internal predecessors, (274), 2 states have call successors, (28), 5 states have call predecessors, (28), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 03:19:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 5978 transitions. [2022-11-23 03:19:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-11-23 03:19:55,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:19:55,272 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 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] [2022-11-23 03:19:55,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:19:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 03:19:55,487 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:19:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:19:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash -581789914, now seen corresponding path program 3 times [2022-11-23 03:19:55,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:19:55,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290347203] [2022-11-23 03:19:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:19:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:19:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:20:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:20:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:20:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:20:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-11-23 03:20:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-11-23 03:20:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:20:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:20:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2022-11-23 03:20:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2022-11-23 03:20:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2022-11-23 03:20:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8847 backedges. 2 proven. 8836 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:20:07,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:20:07,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290347203] [2022-11-23 03:20:07,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290347203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:20:07,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468338954] [2022-11-23 03:20:07,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:20:07,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:20:07,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:20:07,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:20:07,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:20:09,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:20:09,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:20:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 3062 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:20:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:20:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8847 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8845 trivial. 0 not checked. [2022-11-23 03:20:09,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:20:09,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468338954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:20:09,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:20:09,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [100] total 103 [2022-11-23 03:20:09,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948323419] [2022-11-23 03:20:09,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:20:09,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:20:09,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:20:09,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:20:09,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4669, Invalid=5837, Unknown=0, NotChecked=0, Total=10506 [2022-11-23 03:20:09,408 INFO L87 Difference]: Start difference. First operand 4326 states and 5978 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 03:20:11,451 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 03:20:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:20:11,916 INFO L93 Difference]: Finished difference Result 8326 states and 11576 transitions. [2022-11-23 03:20:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:20:11,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 283 [2022-11-23 03:20:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:20:11,928 INFO L225 Difference]: With dead ends: 8326 [2022-11-23 03:20:11,928 INFO L226 Difference]: Without dead ends: 4326 [2022-11-23 03:20:11,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4679, Invalid=6241, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 03:20:11,942 INFO L413 NwaCegarLoop]: 2510 mSDtfsCounter, 3 mSDsluCounter, 7517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10027 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:20:11,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10027 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 03:20:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-11-23 03:20:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4326. [2022-11-23 03:20:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 3100 states have (on average 1.2825806451612902) internal successors, (3976), 3151 states have internal predecessors, (3976), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2022-11-23 03:20:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 5977 transitions. [2022-11-23 03:20:12,287 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 5977 transitions. Word has length 283 [2022-11-23 03:20:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:20:12,289 INFO L495 AbstractCegarLoop]: Abstraction has 4326 states and 5977 transitions. [2022-11-23 03:20:12,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 03:20:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 5977 transitions. [2022-11-23 03:20:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-11-23 03:20:12,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:20:12,296 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 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] [2022-11-23 03:20:12,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:20:12,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 03:20:12,509 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:20:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:20:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash 545721788, now seen corresponding path program 1 times [2022-11-23 03:20:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:20:12,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274071494] [2022-11-23 03:20:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:20:12,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:20:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:23,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:20:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:23,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:20:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:20:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:20:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-11-23 03:20:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-11-23 03:20:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:20:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:20:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-11-23 03:20:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2022-11-23 03:20:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2022-11-23 03:20:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2022-11-23 03:20:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 2 proven. 8836 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 03:20:24,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:20:24,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274071494] [2022-11-23 03:20:24,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274071494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:20:24,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514252995] [2022-11-23 03:20:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:20:24,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:20:24,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:20:24,259 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:20:24,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:20:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:20:26,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 5482 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 03:20:26,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:20:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 6 proven. 8836 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 03:20:26,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:20:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 2 proven. 8836 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 03:20:44,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514252995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:20:44,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:20:44,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 97, 97] total 196 [2022-11-23 03:20:44,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30343075] [2022-11-23 03:20:44,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:20:44,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2022-11-23 03:20:44,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:20:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2022-11-23 03:20:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18535, Invalid=19685, Unknown=0, NotChecked=0, Total=38220 [2022-11-23 03:20:44,564 INFO L87 Difference]: Start difference. First operand 4326 states and 5977 transitions. Second operand has 196 states, 196 states have (on average 2.3979591836734695) internal successors, (470), 193 states have internal predecessors, (470), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 03:21:00,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:21:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:21:10,108 INFO L93 Difference]: Finished difference Result 9606 states and 13613 transitions. [2022-11-23 03:21:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-11-23 03:21:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 2.3979591836734695) internal successors, (470), 193 states have internal predecessors, (470), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 291 [2022-11-23 03:21:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:21:10,127 INFO L225 Difference]: With dead ends: 9606 [2022-11-23 03:21:10,127 INFO L226 Difference]: Without dead ends: 5486 [2022-11-23 03:21:10,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=18545, Invalid=20461, Unknown=0, NotChecked=0, Total=39006 [2022-11-23 03:21:10,142 INFO L413 NwaCegarLoop]: 1092 mSDtfsCounter, 3618 mSDsluCounter, 6698 mSDsCounter, 0 mSdLazyCounter, 14700 mSolverCounterSat, 2399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3843 SdHoareTripleChecker+Valid, 7790 SdHoareTripleChecker+Invalid, 17099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2399 IncrementalHoareTripleChecker+Valid, 14700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:21:10,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3843 Valid, 7790 Invalid, 17099 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2399 Valid, 14700 Invalid, 0 Unknown, 0 Unchecked, 23.0s Time] [2022-11-23 03:21:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2022-11-23 03:21:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 4518. [2022-11-23 03:21:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4518 states, 3292 states have (on average 1.2660996354799514) internal successors, (4168), 3343 states have internal predecessors, (4168), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2022-11-23 03:21:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4518 states to 4518 states and 6169 transitions. [2022-11-23 03:21:10,566 INFO L78 Accepts]: Start accepts. Automaton has 4518 states and 6169 transitions. Word has length 291 [2022-11-23 03:21:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:21:10,567 INFO L495 AbstractCegarLoop]: Abstraction has 4518 states and 6169 transitions. [2022-11-23 03:21:10,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 2.3979591836734695) internal successors, (470), 193 states have internal predecessors, (470), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 03:21:10,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4518 states and 6169 transitions. [2022-11-23 03:21:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-11-23 03:21:10,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:21:10,581 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 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] [2022-11-23 03:21:10,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:10,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 03:21:10,802 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:21:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash 995534652, now seen corresponding path program 2 times [2022-11-23 03:21:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:10,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458178142] [2022-11-23 03:21:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:53,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:21:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:53,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:21:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:21:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:21:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2022-11-23 03:21:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2022-11-23 03:21:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:21:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:21:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2022-11-23 03:21:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 455 [2022-11-23 03:21:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 461 [2022-11-23 03:21:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2022-11-23 03:21:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36114 backedges. 2 proven. 36100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 03:21:54,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:54,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458178142] [2022-11-23 03:21:54,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458178142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:54,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340023911] [2022-11-23 03:21:54,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:21:54,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:54,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:54,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:54,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:21:57,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:21:57,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:57,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 6922 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-23 03:21:57,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36114 backedges. 6 proven. 36100 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 03:21:58,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:22:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36114 backedges. 2 proven. 36100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 03:22:43,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340023911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:22:43,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:22:43,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 193, 193] total 260 [2022-11-23 03:22:43,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329893333] [2022-11-23 03:22:43,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:22:43,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 260 states [2022-11-23 03:22:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:22:43,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 260 interpolants. [2022-11-23 03:22:43,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32903, Invalid=34437, Unknown=0, NotChecked=0, Total=67340 [2022-11-23 03:22:43,379 INFO L87 Difference]: Start difference. First operand 4518 states and 6169 transitions. Second operand has 260 states, 260 states have (on average 2.3076923076923075) internal successors, (600), 257 states have internal predecessors, (600), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 03:23:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:23:18,223 INFO L93 Difference]: Finished difference Result 9734 states and 13709 transitions. [2022-11-23 03:23:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-11-23 03:23:18,224 INFO L78 Accepts]: Start accepts. Automaton has has 260 states, 260 states have (on average 2.3076923076923075) internal successors, (600), 257 states have internal predecessors, (600), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 483 [2022-11-23 03:23:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:23:18,240 INFO L225 Difference]: With dead ends: 9734 [2022-11-23 03:23:18,240 INFO L226 Difference]: Without dead ends: 5614 [2022-11-23 03:23:18,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1184 GetRequests, 796 SyntacticMatches, 128 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17713 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=32913, Invalid=35469, Unknown=0, NotChecked=0, Total=68382 [2022-11-23 03:23:18,253 INFO L413 NwaCegarLoop]: 1101 mSDtfsCounter, 2543 mSDsluCounter, 7874 mSDsCounter, 0 mSdLazyCounter, 17073 mSolverCounterSat, 1470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2771 SdHoareTripleChecker+Valid, 8975 SdHoareTripleChecker+Invalid, 18543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1470 IncrementalHoareTripleChecker+Valid, 17073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2022-11-23 03:23:18,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2771 Valid, 8975 Invalid, 18543 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1470 Valid, 17073 Invalid, 0 Unknown, 0 Unchecked, 30.7s Time] [2022-11-23 03:23:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2022-11-23 03:23:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 4646. [2022-11-23 03:23:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 3420 states have (on average 1.256140350877193) internal successors, (4296), 3471 states have internal predecessors, (4296), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2022-11-23 03:23:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 6297 transitions. [2022-11-23 03:23:18,625 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 6297 transitions. Word has length 483 [2022-11-23 03:23:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:23:18,627 INFO L495 AbstractCegarLoop]: Abstraction has 4646 states and 6297 transitions. [2022-11-23 03:23:18,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 260 states, 260 states have (on average 2.3076923076923075) internal successors, (600), 257 states have internal predecessors, (600), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 03:23:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 6297 transitions. [2022-11-23 03:23:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-11-23 03:23:18,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:23:18,648 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 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] [2022-11-23 03:23:18,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:23:18,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 03:23:18,863 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:23:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1207416892, now seen corresponding path program 3 times [2022-11-23 03:23:18,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:23:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489517376] [2022-11-23 03:23:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:18,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:23:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:23:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:23:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:23:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:23:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2022-11-23 03:23:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2022-11-23 03:23:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:23:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:23:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2022-11-23 03:23:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 583 [2022-11-23 03:23:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2022-11-23 03:23:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2022-11-23 03:23:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64530 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64528 trivial. 0 not checked. [2022-11-23 03:23:23,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:23:23,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489517376] [2022-11-23 03:23:23,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489517376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:23,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:23,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 03:23:23,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150968586] [2022-11-23 03:23:23,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:23,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:23:23,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:23:23,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:23:23,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:23:23,781 INFO L87 Difference]: Start difference. First operand 4646 states and 6297 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:23:26,174 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 03:23:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:23:43,404 INFO L93 Difference]: Finished difference Result 10259 states and 14168 transitions. [2022-11-23 03:23:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:23:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 611 [2022-11-23 03:23:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:23:43,433 INFO L225 Difference]: With dead ends: 10259 [2022-11-23 03:23:43,433 INFO L226 Difference]: Without dead ends: 5628 [2022-11-23 03:23:43,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:23:43,450 INFO L413 NwaCegarLoop]: 1094 mSDtfsCounter, 2333 mSDsluCounter, 3383 mSDsCounter, 0 mSdLazyCounter, 7599 mSolverCounterSat, 1466 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2563 SdHoareTripleChecker+Valid, 4477 SdHoareTripleChecker+Invalid, 9066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 7599 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:23:43,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2563 Valid, 4477 Invalid, 9066 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1466 Valid, 7599 Invalid, 1 Unknown, 0 Unchecked, 18.5s Time] [2022-11-23 03:23:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2022-11-23 03:23:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4658. [2022-11-23 03:23:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 3429 states have (on average 1.2554680664916886) internal successors, (4305), 3480 states have internal predecessors, (4305), 965 states have call successors, (965), 241 states have call predecessors, (965), 263 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2022-11-23 03:23:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 6306 transitions. [2022-11-23 03:23:44,017 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 6306 transitions. Word has length 611 [2022-11-23 03:23:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:23:44,017 INFO L495 AbstractCegarLoop]: Abstraction has 4658 states and 6306 transitions. [2022-11-23 03:23:44,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:23:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 6306 transitions. [2022-11-23 03:23:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-11-23 03:23:44,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:23:44,041 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 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] [2022-11-23 03:23:44,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 03:23:44,041 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:23:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:44,042 INFO L85 PathProgramCache]: Analyzing trace with hash -528575750, now seen corresponding path program 1 times [2022-11-23 03:23:44,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:23:44,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938707149] [2022-11-23 03:23:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:44,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:23:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:23:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:23:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:23:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:23:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2022-11-23 03:23:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2022-11-23 03:23:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:23:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:23:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2022-11-23 03:23:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 583 [2022-11-23 03:23:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2022-11-23 03:23:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2022-11-23 03:23:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 64530 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 64526 trivial. 0 not checked. [2022-11-23 03:23:49,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:23:49,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938707149] [2022-11-23 03:23:49,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938707149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:23:49,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666056522] [2022-11-23 03:23:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:49,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:23:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:23:49,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:23:49,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:23:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:52,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 7883 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 03:23:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 64530 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64528 trivial. 0 not checked. [2022-11-23 03:23:53,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:53,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666056522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:53,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:23:53,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-11-23 03:23:53,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947355685] [2022-11-23 03:23:53,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:53,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:23:53,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:23:53,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:23:53,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:23:53,057 INFO L87 Difference]: Start difference. First operand 4658 states and 6306 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:23:55,125 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 03:23:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:23:55,620 INFO L93 Difference]: Finished difference Result 8658 states and 11904 transitions. [2022-11-23 03:23:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:23:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 611 [2022-11-23 03:23:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:23:55,639 INFO L225 Difference]: With dead ends: 8658 [2022-11-23 03:23:55,640 INFO L226 Difference]: Without dead ends: 4658 [2022-11-23 03:23:55,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:23:55,656 INFO L413 NwaCegarLoop]: 2506 mSDtfsCounter, 10 mSDsluCounter, 12521 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15027 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:23:55,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15027 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 03:23:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2022-11-23 03:23:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 4658. [2022-11-23 03:23:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 3429 states have (on average 1.2551764362787985) internal successors, (4304), 3480 states have internal predecessors, (4304), 965 states have call successors, (965), 241 states have call predecessors, (965), 263 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2022-11-23 03:23:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 6305 transitions. [2022-11-23 03:23:55,987 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 6305 transitions. Word has length 611 [2022-11-23 03:23:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:23:55,989 INFO L495 AbstractCegarLoop]: Abstraction has 4658 states and 6305 transitions. [2022-11-23 03:23:55,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:23:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 6305 transitions. [2022-11-23 03:23:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-11-23 03:23:56,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:23:56,000 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 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] [2022-11-23 03:23:56,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:23:56,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 03:23:56,224 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:23:56,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:56,224 INFO L85 PathProgramCache]: Analyzing trace with hash -58400934, now seen corresponding path program 1 times [2022-11-23 03:23:56,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:23:56,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142154907] [2022-11-23 03:23:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:56,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:23:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:24:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:24:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:24:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-23 03:24:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2022-11-23 03:24:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2022-11-23 03:24:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:24:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:24:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2022-11-23 03:24:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2022-11-23 03:24:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2022-11-23 03:24:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2022-11-23 03:24:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64530 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 64526 trivial. 0 not checked. [2022-11-23 03:24:00,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:24:00,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142154907] [2022-11-23 03:24:00,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142154907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:24:00,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428680848] [2022-11-23 03:24:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:24:00,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:24:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:24:00,583 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:24:00,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:24:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 7920 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-23 03:24:19,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:24:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64530 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 64524 trivial. 0 not checked. [2022-11-23 03:24:19,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:24:19,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428680848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:24:19,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:24:19,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 11 [2022-11-23 03:24:19,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356400401] [2022-11-23 03:24:19,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:24:19,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:24:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:24:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:24:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:24:19,874 INFO L87 Difference]: Start difference. First operand 4658 states and 6305 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 03:24:22,237 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 03:24:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:24:22,713 INFO L93 Difference]: Finished difference Result 9305 states and 12613 transitions. [2022-11-23 03:24:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:24:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 614 [2022-11-23 03:24:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:24:22,732 INFO L225 Difference]: With dead ends: 9305 [2022-11-23 03:24:22,732 INFO L226 Difference]: Without dead ends: 4666 [2022-11-23 03:24:22,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 635 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:24:22,750 INFO L413 NwaCegarLoop]: 2505 mSDtfsCounter, 42 mSDsluCounter, 14998 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 17503 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:24:22,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 17503 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 03:24:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2022-11-23 03:24:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4658. [2022-11-23 03:24:23,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 3429 states have (on average 1.2548848060659084) internal successors, (4303), 3480 states have internal predecessors, (4303), 965 states have call successors, (965), 241 states have call predecessors, (965), 263 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2022-11-23 03:24:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 6304 transitions. [2022-11-23 03:24:23,178 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 6304 transitions. Word has length 614 [2022-11-23 03:24:23,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:24:23,178 INFO L495 AbstractCegarLoop]: Abstraction has 4658 states and 6304 transitions. [2022-11-23 03:24:23,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 03:24:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 6304 transitions. [2022-11-23 03:24:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-11-23 03:24:23,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:24:23,187 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 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] [2022-11-23 03:24:23,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:24:23,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:24:23,388 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:24:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:24:23,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1857518203, now seen corresponding path program 1 times [2022-11-23 03:24:23,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:24:23,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951060944] [2022-11-23 03:24:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:24:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:24:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:27,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:24:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:27,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:24:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:27,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:24:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-23 03:24:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:27,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 543 [2022-11-23 03:24:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:27,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 549 [2022-11-23 03:24:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:27,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:24:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:28,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:24:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:28,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 569 [2022-11-23 03:24:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:28,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2022-11-23 03:24:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:28,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2022-11-23 03:24:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:28,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 601 [2022-11-23 03:24:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64530 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64526 trivial. 0 not checked. [2022-11-23 03:24:28,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:24:28,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951060944] [2022-11-23 03:24:28,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951060944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:24:28,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:24:28,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 03:24:28,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040026428] [2022-11-23 03:24:28,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:24:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:24:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:24:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:24:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:24:28,180 INFO L87 Difference]: Start difference. First operand 4658 states and 6304 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (12), 5 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:24:48,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:25:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:25:03,205 INFO L93 Difference]: Finished difference Result 9737 states and 13639 transitions. [2022-11-23 03:25:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 03:25:03,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (12), 5 states have call predecessors, (12), 2 states have call successors, (12) Word has length 617 [2022-11-23 03:25:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:25:03,237 INFO L225 Difference]: With dead ends: 9737 [2022-11-23 03:25:03,237 INFO L226 Difference]: Without dead ends: 5626 [2022-11-23 03:25:03,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-23 03:25:03,257 INFO L413 NwaCegarLoop]: 1099 mSDtfsCounter, 2290 mSDsluCounter, 8773 mSDsCounter, 0 mSdLazyCounter, 18340 mSolverCounterSat, 1470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2519 SdHoareTripleChecker+Valid, 9872 SdHoareTripleChecker+Invalid, 19810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1470 IncrementalHoareTripleChecker+Valid, 18340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:25:03,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2519 Valid, 9872 Invalid, 19810 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1470 Valid, 18340 Invalid, 0 Unknown, 0 Unchecked, 33.5s Time] [2022-11-23 03:25:03,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2022-11-23 03:25:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4667. [2022-11-23 03:25:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 3435 states have (on average 1.254439592430859) internal successors, (4309), 3487 states have internal predecessors, (4309), 965 states have call successors, (965), 241 states have call predecessors, (965), 266 states have return successors, (1057), 955 states have call predecessors, (1057), 944 states have call successors, (1057) [2022-11-23 03:25:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 6331 transitions. [2022-11-23 03:25:03,798 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 6331 transitions. Word has length 617 [2022-11-23 03:25:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:25:03,799 INFO L495 AbstractCegarLoop]: Abstraction has 4667 states and 6331 transitions. [2022-11-23 03:25:03,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (12), 5 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 03:25:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 6331 transitions. [2022-11-23 03:25:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2022-11-23 03:25:03,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:25:03,808 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:25:03,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 03:25:03,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:25:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:25:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash -207705596, now seen corresponding path program 1 times [2022-11-23 03:25:03,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:25:03,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455430076] [2022-11-23 03:25:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:25:03,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:25:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:32,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 03:27:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:32,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-23 03:27:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:32,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 03:27:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:32,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-23 03:27:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:32,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 543 [2022-11-23 03:27:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:32,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 549 [2022-11-23 03:27:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:33,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:27:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:33,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-23 03:27:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:33,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2022-11-23 03:27:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:33,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2022-11-23 03:27:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:33,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2022-11-23 03:27:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:33,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 604 [2022-11-23 03:27:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64533 backedges. 2 proven. 259 refuted. 0 times theorem prover too weak. 64272 trivial. 0 not checked. [2022-11-23 03:27:33,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:33,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455430076] [2022-11-23 03:27:33,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455430076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:27:33,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874527514] [2022-11-23 03:27:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:33,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:33,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:27:33,999 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:27:34,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc4ac327-93a2-494f-b79c-57ae87345bfe/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process