./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4437765aefc9e8e96e3710e0e55c61aa0f0e29783186331c7ab028aba8558a0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:52:10,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:52:10,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:52:10,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:52:10,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:52:10,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:52:10,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:52:10,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:52:10,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:52:10,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:52:10,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:52:10,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:52:10,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:52:10,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:52:10,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:52:10,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:52:10,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:52:10,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:52:10,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:52:10,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:52:10,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:52:10,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:52:10,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:52:10,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:52:10,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:52:10,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:52:10,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:52:10,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:52:10,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:52:10,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:52:10,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:52:10,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:52:10,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:52:10,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:52:10,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:52:10,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:52:10,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:52:10,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:52:10,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:52:10,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:52:10,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:52:10,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:52:10,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:52:10,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:52:10,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:52:10,948 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:52:10,949 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:52:10,949 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:52:10,949 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:52:10,949 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:52:10,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:52:10,950 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:52:10,951 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:52:10,951 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:52:10,951 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:52:10,952 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:52:10,952 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:52:10,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:52:10,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:52:10,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:52:10,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:52:10,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:52:10,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:52:10,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:52:10,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:52:10,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:52:10,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:52:10,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:52:10,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:52:10,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:10,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:52:10,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:52:10,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:52:10,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:52:10,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:52:10,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:52:10,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:52:10,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:52:10,959 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4437765aefc9e8e96e3710e0e55c61aa0f0e29783186331c7ab028aba8558a0d [2021-11-07 01:52:11,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:52:11,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:52:11,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:52:11,276 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:52:11,276 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:52:11,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-07 01:52:11,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data/9959ec7f7/3cd9f253743349e1b7ed07394491340a/FLAG8c8e74075 [2021-11-07 01:52:12,237 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:52:12,239 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-07 01:52:12,300 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data/9959ec7f7/3cd9f253743349e1b7ed07394491340a/FLAG8c8e74075 [2021-11-07 01:52:12,759 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data/9959ec7f7/3cd9f253743349e1b7ed07394491340a [2021-11-07 01:52:12,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:52:12,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:52:12,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:12,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:52:12,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:52:12,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:12" (1/1) ... [2021-11-07 01:52:12,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a04a36c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:12, skipping insertion in model container [2021-11-07 01:52:12,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:12" (1/1) ... [2021-11-07 01:52:12,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:52:13,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:14,275 WARN L228 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_699366ab-8998-49e3-b0cc-b3aac4fd3037/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[119996,120009] [2021-11-07 01:52:14,475 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,498 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,514 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,662 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,678 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,694 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,695 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,709 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,710 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,711 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,717 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,723 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:14,993 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,321 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,322 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,326 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,332 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,339 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,346 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,351 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,358 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,358 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,359 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:52:15,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:15,498 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:52:15,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4fe601d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:15, skipping insertion in model container [2021-11-07 01:52:15,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:15,499 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:52:15,502 INFO L168 Benchmark]: Toolchain (without parser) took 2737.65 ms. Allocated memory was 98.6 MB in the beginning and 121.6 MB in the end (delta: 23.1 MB). Free memory was 62.2 MB in the beginning and 72.5 MB in the end (delta: -10.3 MB). Peak memory consumption was 41.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:52:15,503 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 81.8 MB. Free memory was 51.6 MB in the beginning and 51.5 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:52:15,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2734.59 ms. Allocated memory was 98.6 MB in the beginning and 121.6 MB in the end (delta: 23.1 MB). Free memory was 61.9 MB in the beginning and 72.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 41.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:52:15,507 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 81.8 MB. Free memory was 51.6 MB in the beginning and 51.5 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2734.59 ms. Allocated memory was 98.6 MB in the beginning and 121.6 MB in the end (delta: 23.1 MB). Free memory was 61.9 MB in the beginning and 72.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 41.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4384]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4437765aefc9e8e96e3710e0e55c61aa0f0e29783186331c7ab028aba8558a0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:52:17,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:52:17,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:52:18,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:52:18,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:52:18,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:52:18,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:52:18,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:52:18,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:52:18,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:52:18,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:52:18,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:52:18,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:52:18,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:52:18,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:52:18,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:52:18,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:52:18,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:52:18,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:52:18,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:52:18,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:52:18,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:52:18,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:52:18,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:52:18,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:52:18,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:52:18,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:52:18,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:52:18,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:52:18,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:52:18,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:52:18,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:52:18,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:52:18,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:52:18,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:52:18,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:52:18,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:52:18,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:52:18,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:52:18,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:52:18,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:52:18,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:52:18,132 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:52:18,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:52:18,135 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:52:18,135 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:52:18,135 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:52:18,136 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:52:18,136 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:52:18,136 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:52:18,136 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:52:18,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:52:18,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:52:18,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:52:18,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:52:18,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:52:18,140 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:52:18,141 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:52:18,141 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:52:18,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:52:18,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:52:18,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:52:18,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:52:18,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:52:18,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:52:18,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:18,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:52:18,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:52:18,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:52:18,143 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:52:18,144 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:18,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:52:18,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:52:18,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:52:18,144 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4437765aefc9e8e96e3710e0e55c61aa0f0e29783186331c7ab028aba8558a0d [2021-11-07 01:52:18,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:52:18,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:52:18,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:52:18,548 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:52:18,549 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:52:18,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-07 01:52:18,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data/56e75adbf/759f862ebbea4ce4baf9b215ae57f2f7/FLAGaa8fde221 [2021-11-07 01:52:19,744 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:52:19,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-07 01:52:19,799 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data/56e75adbf/759f862ebbea4ce4baf9b215ae57f2f7/FLAGaa8fde221 [2021-11-07 01:52:20,110 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/data/56e75adbf/759f862ebbea4ce4baf9b215ae57f2f7 [2021-11-07 01:52:20,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:52:20,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:52:20,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:20,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:52:20,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:52:20,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:20" (1/1) ... [2021-11-07 01:52:20,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133e84c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:20, skipping insertion in model container [2021-11-07 01:52:20,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:20" (1/1) ... [2021-11-07 01:52:20,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:52:20,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:21,687 WARN L228 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_699366ab-8998-49e3-b0cc-b3aac4fd3037/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[119996,120009] [2021-11-07 01:52:23,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:23,164 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:52:23,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:23,361 WARN L228 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_699366ab-8998-49e3-b0cc-b3aac4fd3037/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[119996,120009] [2021-11-07 01:52:23,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:23,660 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:52:23,812 WARN L228 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_699366ab-8998-49e3-b0cc-b3aac4fd3037/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[119996,120009] [2021-11-07 01:52:24,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:24,607 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:52:24,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24 WrapperNode [2021-11-07 01:52:24,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:24,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:52:24,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:52:24,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:52:24,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:24,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:25,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:52:25,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:52:25,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:52:25,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:52:25,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:25,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:25,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:25,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:25,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:25,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:25,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:25,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:52:25,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:52:25,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:52:25,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:52:25,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (1/1) ... [2021-11-07 01:52:25,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:25,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:52:25,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:52:25,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:52:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:52:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-07 01:52:25,803 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-07 01:52:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:52:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:52:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:52:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-07 01:52:25,804 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-07 01:52:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-07 01:52:25,804 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-07 01:52:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 01:52:25,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 01:52:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-07 01:52:25,805 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-07 01:52:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~C_INT [2021-11-07 01:52:25,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~C_INT [2021-11-07 01:52:25,806 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-07 01:52:25,806 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-07 01:52:25,806 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-07 01:52:25,806 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-07 01:52:25,807 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_UINT~X~C_UINT~TO~C_INT [2021-11-07 01:52:25,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_UINT~X~C_UINT~TO~C_INT [2021-11-07 01:52:25,807 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-07 01:52:25,807 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-07 01:52:25,808 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-07 01:52:25,808 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-07 01:52:25,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:52:25,808 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-07 01:52:25,808 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-07 01:52:25,809 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2021-11-07 01:52:25,809 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2021-11-07 01:52:25,809 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-07 01:52:25,809 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-07 01:52:25,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:52:25,810 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-07 01:52:25,810 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-07 01:52:25,810 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-07 01:52:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-07 01:52:25,811 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-07 01:52:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:52:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:52:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2021-11-07 01:52:25,812 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2021-11-07 01:52:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:52:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:52:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:52:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:52:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:52:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:52:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:52:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:52:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-07 01:52:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-07 01:52:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-07 01:52:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-07 01:52:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-07 01:52:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-07 01:52:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_bulk_callback [2021-11-07 01:52:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_bulk_callback [2021-11-07 01:52:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-07 01:52:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-07 01:52:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-07 01:52:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-07 01:52:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-07 01:52:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-07 01:52:25,820 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-07 01:52:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-07 01:52:25,820 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 01:52:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 01:52:25,821 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-07 01:52:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-07 01:52:25,821 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_41 [2021-11-07 01:52:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_41 [2021-11-07 01:52:25,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_42 [2021-11-07 01:52:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_42 [2021-11-07 01:52:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-07 01:52:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-07 01:52:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 01:52:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 01:52:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-07 01:52:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-07 01:52:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2021-11-07 01:52:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2021-11-07 01:52:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:52:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:52:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 01:52:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-07 01:52:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-07 01:52:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_put_4 [2021-11-07 01:52:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_put_4 [2021-11-07 01:52:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:52:25,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:52:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-07 01:52:25,828 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-07 01:52:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-07 01:52:25,829 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-07 01:52:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-07 01:52:25,830 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-07 01:52:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:52:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:53:50,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:53:50,704 INFO L299 CfgBuilder]: Removed 1938 assume(true) statements. [2021-11-07 01:53:50,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:50 BoogieIcfgContainer [2021-11-07 01:53:50,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:53:50,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:53:50,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:53:50,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:53:50,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:52:20" (1/3) ... [2021-11-07 01:53:50,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbef4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:50, skipping insertion in model container [2021-11-07 01:53:50,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:24" (2/3) ... [2021-11-07 01:53:50,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbef4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:50, skipping insertion in model container [2021-11-07 01:53:50,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:50" (3/3) ... [2021-11-07 01:53:50,718 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-07 01:53:50,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:53:50,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-07 01:53:50,788 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:53:50,795 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:53:50,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-07 01:53:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 2350 states, 2179 states have (on average 1.3841211564938045) internal successors, (3016), 2201 states have internal predecessors, (3016), 119 states have call successors, (119), 39 states have call predecessors, (119), 39 states have return successors, (119), 111 states have call predecessors, (119), 119 states have call successors, (119) [2021-11-07 01:53:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:53:50,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:50,874 INFO L513 BasicCegarLoop]: 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, 1] [2021-11-07 01:53:50,875 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:53:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1819104871, now seen corresponding path program 1 times [2021-11-07 01:53:50,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:50,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681011521] [2021-11-07 01:53:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:50,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:50,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:50,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:50,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:54:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:54:08,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:08,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:09,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:09,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681011521] [2021-11-07 01:54:09,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681011521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:09,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:09,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:09,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750328917] [2021-11-07 01:54:09,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:09,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:09,175 INFO L87 Difference]: Start difference. First operand has 2350 states, 2179 states have (on average 1.3841211564938045) internal successors, (3016), 2201 states have internal predecessors, (3016), 119 states have call successors, (119), 39 states have call predecessors, (119), 39 states have return successors, (119), 111 states have call predecessors, (119), 119 states have call successors, (119) Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:09,464 INFO L93 Difference]: Finished difference Result 4697 states and 6606 transitions. [2021-11-07 01:54:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:09,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 01:54:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:09,499 INFO L225 Difference]: With dead ends: 4697 [2021-11-07 01:54:09,499 INFO L226 Difference]: Without dead ends: 2330 [2021-11-07 01:54:09,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-11-07 01:54:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2330. [2021-11-07 01:54:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2160 states have (on average 1.3314814814814815) internal successors, (2876), 2181 states have internal predecessors, (2876), 119 states have call successors, (119), 39 states have call predecessors, (119), 39 states have return successors, (119), 111 states have call predecessors, (119), 119 states have call successors, (119) [2021-11-07 01:54:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3114 transitions. [2021-11-07 01:54:09,696 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3114 transitions. Word has length 36 [2021-11-07 01:54:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:09,697 INFO L470 AbstractCegarLoop]: Abstraction has 2330 states and 3114 transitions. [2021-11-07 01:54:09,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3114 transitions. [2021-11-07 01:54:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:54:09,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:09,702 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:54:09,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:09,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:09,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:54:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash 194000985, now seen corresponding path program 1 times [2021-11-07 01:54:09,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:09,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708290554] [2021-11-07 01:54:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:09,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:09,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:09,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:09,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:54:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 2438 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:54:27,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:27,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:28,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:28,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708290554] [2021-11-07 01:54:28,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708290554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:28,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674056167] [2021-11-07 01:54:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:28,881 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:28,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:54:28,894 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:54:28,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 01:54:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:32,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 2438 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:54:33,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:54:33,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [674056167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:33,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:54:33,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:54:33,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742258496] [2021-11-07 01:54:33,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:33,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:33,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:54:33,807 INFO L87 Difference]: Start difference. First operand 2330 states and 3114 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:41,730 INFO L93 Difference]: Finished difference Result 8797 states and 11872 transitions. [2021-11-07 01:54:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:41,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 01:54:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:41,795 INFO L225 Difference]: With dead ends: 8797 [2021-11-07 01:54:41,796 INFO L226 Difference]: Without dead ends: 6546 [2021-11-07 01:54:41,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:54:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6546 states. [2021-11-07 01:54:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6546 to 6522. [2021-11-07 01:54:42,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6522 states, 6036 states have (on average 1.344599072233267) internal successors, (8116), 6077 states have internal predecessors, (8116), 357 states have call successors, (357), 117 states have call predecessors, (357), 117 states have return successors, (357), 333 states have call predecessors, (357), 357 states have call successors, (357) [2021-11-07 01:54:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6522 states to 6522 states and 8830 transitions. [2021-11-07 01:54:42,127 INFO L78 Accepts]: Start accepts. Automaton has 6522 states and 8830 transitions. Word has length 38 [2021-11-07 01:54:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:42,128 INFO L470 AbstractCegarLoop]: Abstraction has 6522 states and 8830 transitions. [2021-11-07 01:54:42,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6522 states and 8830 transitions. [2021-11-07 01:54:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:54:42,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:42,135 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:54:42,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:42,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:54:42,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:42,548 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:54:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:42,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1339338976, now seen corresponding path program 1 times [2021-11-07 01:54:42,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:42,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042381443] [2021-11-07 01:54:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:42,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:42,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:42,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:42,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:54:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:59,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:54:59,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:00,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:01,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:01,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042381443] [2021-11-07 01:55:01,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042381443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:01,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1092666145] [2021-11-07 01:55:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:01,600 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:01,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:01,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:01,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:55:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:55:06,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:55:06,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1092666145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:06,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:06,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:55:06,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682951396] [2021-11-07 01:55:06,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:06,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:55:06,614 INFO L87 Difference]: Start difference. First operand 6522 states and 8830 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:13,546 INFO L93 Difference]: Finished difference Result 17957 states and 24264 transitions. [2021-11-07 01:55:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:55:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:13,634 INFO L225 Difference]: With dead ends: 17957 [2021-11-07 01:55:13,634 INFO L226 Difference]: Without dead ends: 11514 [2021-11-07 01:55:13,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:55:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11514 states. [2021-11-07 01:55:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11514 to 11450. [2021-11-07 01:55:14,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11450 states, 10589 states have (on average 1.3412975729530645) internal successors, (14203), 10660 states have internal predecessors, (14203), 627 states have call successors, (627), 222 states have call predecessors, (627), 222 states have return successors, (627), 579 states have call predecessors, (627), 627 states have call successors, (627) [2021-11-07 01:55:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11450 states to 11450 states and 15457 transitions. [2021-11-07 01:55:14,191 INFO L78 Accepts]: Start accepts. Automaton has 11450 states and 15457 transitions. Word has length 48 [2021-11-07 01:55:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:14,192 INFO L470 AbstractCegarLoop]: Abstraction has 11450 states and 15457 transitions. [2021-11-07 01:55:14,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11450 states and 15457 transitions. [2021-11-07 01:55:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:55:14,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:14,198 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:55:14,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:14,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:14,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:14,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:55:14,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1848821186, now seen corresponding path program 1 times [2021-11-07 01:55:14,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:14,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603560697] [2021-11-07 01:55:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:14,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:14,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:14,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:14,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:55:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:55:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:33,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:34,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:34,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603560697] [2021-11-07 01:55:34,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603560697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:34,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1893969724] [2021-11-07 01:55:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:34,282 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:34,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:34,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:34,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:55:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:55:38,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:55:40,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:55:42,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1893969724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:42,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:42,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 01:55:42,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001421960] [2021-11-07 01:55:42,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:42,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:42,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:42,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:55:42,028 INFO L87 Difference]: Start difference. First operand 11450 states and 15457 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:43,660 INFO L93 Difference]: Finished difference Result 34190 states and 47895 transitions. [2021-11-07 01:55:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:43,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:55:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:43,829 INFO L225 Difference]: With dead ends: 34190 [2021-11-07 01:55:43,829 INFO L226 Difference]: Without dead ends: 22819 [2021-11-07 01:55:43,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:55:43,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22819 states. [2021-11-07 01:55:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22819 to 22793. [2021-11-07 01:55:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22793 states, 21083 states have (on average 1.3410804913911683) internal successors, (28274), 21214 states have internal predecessors, (28274), 1254 states have call successors, (1254), 444 states have call predecessors, (1254), 444 states have return successors, (1857), 1158 states have call predecessors, (1857), 1254 states have call successors, (1857) [2021-11-07 01:55:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22793 states to 22793 states and 31385 transitions. [2021-11-07 01:55:45,267 INFO L78 Accepts]: Start accepts. Automaton has 22793 states and 31385 transitions. Word has length 48 [2021-11-07 01:55:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:45,268 INFO L470 AbstractCegarLoop]: Abstraction has 22793 states and 31385 transitions. [2021-11-07 01:55:45,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 22793 states and 31385 transitions. [2021-11-07 01:55:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:55:45,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:45,272 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:55:45,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:45,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:45,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:45,673 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:55:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1478877942, now seen corresponding path program 1 times [2021-11-07 01:55:45,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:45,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506612412] [2021-11-07 01:55:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:45,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:45,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:45,684 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:45,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:56:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:56:03,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:04,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:05,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:05,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506612412] [2021-11-07 01:56:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506612412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:05,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2022200904] [2021-11-07 01:56:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:05,497 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:05,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:05,500 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:05,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:56:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:56:09,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:11,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:13,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2022200904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:13,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:13,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 01:56:13,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327576390] [2021-11-07 01:56:13,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:56:13,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:13,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:56:13,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:13,221 INFO L87 Difference]: Start difference. First operand 22793 states and 31385 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:22,536 INFO L93 Difference]: Finished difference Result 90850 states and 133018 transitions. [2021-11-07 01:56:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:56:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:56:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:23,065 INFO L225 Difference]: With dead ends: 90850 [2021-11-07 01:56:23,066 INFO L226 Difference]: Without dead ends: 68136 [2021-11-07 01:56:23,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68136 states. [2021-11-07 01:56:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68136 to 68074. [2021-11-07 01:56:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68074 states, 62968 states have (on average 1.3404586456612884) internal successors, (84406), 63339 states have internal predecessors, (84406), 3762 states have call successors, (3762), 1332 states have call predecessors, (3762), 1332 states have return successors, (8352), 3474 states have call predecessors, (8352), 3762 states have call successors, (8352) [2021-11-07 01:56:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68074 states to 68074 states and 96520 transitions. [2021-11-07 01:56:26,935 INFO L78 Accepts]: Start accepts. Automaton has 68074 states and 96520 transitions. Word has length 49 [2021-11-07 01:56:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:26,936 INFO L470 AbstractCegarLoop]: Abstraction has 68074 states and 96520 transitions. [2021-11-07 01:56:26,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 68074 states and 96520 transitions. [2021-11-07 01:56:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:56:26,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:26,942 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:56:27,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:27,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:27,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:27,367 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:56:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash -824665658, now seen corresponding path program 1 times [2021-11-07 01:56:27,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:27,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593161689] [2021-11-07 01:56:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:27,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:27,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:27,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:27,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:56:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:56:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:46,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:47,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:47,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593161689] [2021-11-07 01:56:47,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593161689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:47,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854630031] [2021-11-07 01:56:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:47,574 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:47,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:47,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:47,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:56:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:52,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:56:52,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:52,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:53,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854630031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:53,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:53,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:56:53,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540372037] [2021-11-07 01:56:53,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:56:53,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:53,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:56:53,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:56:53,348 INFO L87 Difference]: Start difference. First operand 68074 states and 96520 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:00,848 INFO L93 Difference]: Finished difference Result 201562 states and 292714 transitions. [2021-11-07 01:57:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:57:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:02,336 INFO L225 Difference]: With dead ends: 201562 [2021-11-07 01:57:02,336 INFO L226 Difference]: Without dead ends: 133567 [2021-11-07 01:57:02,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:03,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133567 states. [2021-11-07 01:57:10,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133567 to 133138. [2021-11-07 01:57:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133138 states, 123334 states have (on average 1.3396143804628082) internal successors, (165220), 123975 states have internal predecessors, (165220), 7164 states have call successors, (7164), 2628 states have call predecessors, (7164), 2628 states have return successors, (23400), 6660 states have call predecessors, (23400), 7164 states have call successors, (23400) [2021-11-07 01:57:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133138 states to 133138 states and 195784 transitions. [2021-11-07 01:57:12,830 INFO L78 Accepts]: Start accepts. Automaton has 133138 states and 195784 transitions. Word has length 53 [2021-11-07 01:57:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:12,831 INFO L470 AbstractCegarLoop]: Abstraction has 133138 states and 195784 transitions. [2021-11-07 01:57:12,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 133138 states and 195784 transitions. [2021-11-07 01:57:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:57:12,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:12,835 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:57:12,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:13,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:13,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:13,260 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:57:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1399428040, now seen corresponding path program 1 times [2021-11-07 01:57:13,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:13,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881462333] [2021-11-07 01:57:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:13,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:13,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:13,270 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:13,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:57:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:33,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2480 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:57:33,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:34,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:35,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:35,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881462333] [2021-11-07 01:57:35,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881462333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:35,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [438175174] [2021-11-07 01:57:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:35,764 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:35,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:35,767 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:35,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:57:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:40,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:57:41,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:57:43,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [438175174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:43,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:43,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:57:43,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625866588] [2021-11-07 01:57:43,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:43,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:43,124 INFO L87 Difference]: Start difference. First operand 133138 states and 195784 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:48,070 INFO L93 Difference]: Finished difference Result 133178 states and 195819 transitions. [2021-11-07 01:57:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:48,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:57:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:48,798 INFO L225 Difference]: With dead ends: 133178 [2021-11-07 01:57:48,799 INFO L226 Difference]: Without dead ends: 133176 [2021-11-07 01:57:48,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133176 states. [2021-11-07 01:57:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133176 to 133160. [2021-11-07 01:57:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133160 states, 123356 states have (on average 1.3395781315866273) internal successors, (165245), 123997 states have internal predecessors, (165245), 7164 states have call successors, (7164), 2628 states have call predecessors, (7164), 2628 states have return successors, (23400), 6660 states have call predecessors, (23400), 7164 states have call successors, (23400) [2021-11-07 01:57:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133160 states to 133160 states and 195809 transitions. [2021-11-07 01:57:56,835 INFO L78 Accepts]: Start accepts. Automaton has 133160 states and 195809 transitions. Word has length 50 [2021-11-07 01:57:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:56,836 INFO L470 AbstractCegarLoop]: Abstraction has 133160 states and 195809 transitions. [2021-11-07 01:57:56,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 133160 states and 195809 transitions. [2021-11-07 01:57:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:57:56,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:56,838 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:57:56,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:57,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-07 01:57:57,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:57,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:57:57,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:57,240 INFO L85 PathProgramCache]: Analyzing trace with hash 432600276, now seen corresponding path program 1 times [2021-11-07 01:57:57,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:57,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289209299] [2021-11-07 01:57:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:57,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:57,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:57,250 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:57,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:58:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:17,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 2481 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:58:17,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:18,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:19,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:19,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289209299] [2021-11-07 01:58:19,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289209299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:19,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [91395230] [2021-11-07 01:58:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:19,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:19,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:19,681 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:19,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699366ab-8998-49e3-b0cc-b3aac4fd3037/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 01:58:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:24,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:26,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:27,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [91395230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:27,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:27,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:27,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515820786] [2021-11-07 01:58:27,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:27,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:27,170 INFO L87 Difference]: Start difference. First operand 133160 states and 195809 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:38,606 INFO L93 Difference]: Finished difference Result 331823 states and 501898 transitions. [2021-11-07 01:58:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:58:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:39,939 INFO L225 Difference]: With dead ends: 331823 [2021-11-07 01:58:39,939 INFO L226 Difference]: Without dead ends: 198742 [2021-11-07 01:58:40,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198742 states.