./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF --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 ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:40:36,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:40:36,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:40:36,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:40:36,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:40:36,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:40:36,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:40:36,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:40:36,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:40:36,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:40:36,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:40:36,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:40:36,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:40:36,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:40:36,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:40:36,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:40:36,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:40:36,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:40:36,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:40:36,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:40:36,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:40:36,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:40:36,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:40:36,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:40:36,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:40:36,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:40:36,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:40:36,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:40:36,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:40:36,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:40:36,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:40:36,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:40:36,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:40:36,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:40:36,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:40:36,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:40:36,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:40:36,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:40:36,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:40:36,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:40:36,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:40:36,913 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:40:36,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:40:36,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:40:36,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:40:36,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:40:36,938 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:40:36,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:40:36,938 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:40:36,938 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:40:36,938 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:40:36,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:40:36,939 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:40:36,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:40:36,939 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:40:36,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:40:36,940 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:40:36,940 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:40:36,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:40:36,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:40:36,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:40:36,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:40:36,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:40:36,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:40:36,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:40:36,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:40:36,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:40:36,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:40:36,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:40:36,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:40:36,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:40:36,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:40:36,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:40:36,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:40:36,944 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:40:36,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:40:36,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:40:36,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:40:36,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:40:36,946 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_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2021-11-13 02:40:37,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:40:37,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:40:37,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:40:37,274 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:40:37,275 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:40:37,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-13 02:40:37,361 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data/f3b4d34cc/b9a78d6ddd94484bb75d25254fc1067c/FLAG37b5bce65 [2021-11-13 02:40:38,331 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:40:38,332 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-13 02:40:38,377 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data/f3b4d34cc/b9a78d6ddd94484bb75d25254fc1067c/FLAG37b5bce65 [2021-11-13 02:40:38,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data/f3b4d34cc/b9a78d6ddd94484bb75d25254fc1067c [2021-11-13 02:40:38,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:40:38,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:40:38,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:40:38,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:40:38,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:40:38,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:40:38" (1/1) ... [2021-11-13 02:40:38,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a87967b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:38, skipping insertion in model container [2021-11-13 02:40:38,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:40:38" (1/1) ... [2021-11-13 02:40:38,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:40:38,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:40:40,462 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,485 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,497 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,504 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,511 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,519 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,527 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,534 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,542 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,550 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,557 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,565 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,572 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,592 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,600 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,606 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,635 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,720 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,743 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,746 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,752 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,757 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,796 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,889 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:40,957 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,042 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,047 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,057 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,061 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,070 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,073 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,074 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,079 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,083 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,087 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:40:41,194 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_da2fd90d-966d-4ec4-90ad-76347c34bfad/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-13 02:40:41,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:40:41,391 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) [2021-11-13 02:40:41,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56a167ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:41, skipping insertion in model container [2021-11-13 02:40:41,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:40:41,393 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:40:41,396 INFO L158 Benchmark]: Toolchain (without parser) took 2622.02ms. Allocated memory is still 134.2MB. Free memory was 106.6MB in the beginning and 59.7MB in the end (delta: 46.9MB). Peak memory consumption was 80.8MB. Max. memory is 16.1GB. [2021-11-13 02:40:41,396 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory is still 72.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:40:41,399 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2619.28ms. Allocated memory is still 134.2MB. Free memory was 106.6MB in the beginning and 59.7MB in the end (delta: 46.9MB). Peak memory consumption was 80.8MB. Max. memory is 16.1GB. [2021-11-13 02:40:41,400 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory is still 72.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2619.28ms. Allocated memory is still 134.2MB. Free memory was 106.6MB in the beginning and 59.7MB in the end (delta: 46.9MB). Peak memory consumption was 80.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4022]: 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_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF --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 ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:40:43,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:40:43,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:40:43,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:40:43,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:40:43,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:40:43,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:40:43,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:40:43,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:40:43,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:40:43,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:40:43,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:40:43,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:40:43,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:40:43,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:40:43,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:40:43,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:40:43,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:40:43,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:40:43,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:40:43,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:40:43,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:40:43,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:40:43,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:40:43,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:40:43,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:40:43,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:40:43,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:40:43,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:40:43,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:40:43,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:40:43,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:40:43,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:40:43,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:40:43,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:40:43,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:40:43,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:40:43,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:40:43,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:40:43,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:40:43,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:40:43,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:40:43,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:40:43,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:40:43,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:40:43,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:40:43,681 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:40:43,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:40:43,681 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:40:43,681 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:40:43,681 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:40:43,682 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:40:43,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:40:43,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:40:43,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:40:43,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:40:43,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:40:43,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:40:43,685 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:40:43,685 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:40:43,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:40:43,686 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:40:43,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:40:43,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:40:43,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:40:43,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:40:43,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:40:43,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:40:43,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:40:43,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:40:43,687 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:40:43,688 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:40:43,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:40:43,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:40:43,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:40:43,688 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_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2021-11-13 02:40:44,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:40:44,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:40:44,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:40:44,081 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:40:44,082 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:40:44,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-13 02:40:44,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data/847a342e0/c9d633ce8e394c3b88638037c9937023/FLAGac5bb3d64 [2021-11-13 02:40:45,162 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:40:45,163 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-13 02:40:45,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data/847a342e0/c9d633ce8e394c3b88638037c9937023/FLAGac5bb3d64 [2021-11-13 02:40:45,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/data/847a342e0/c9d633ce8e394c3b88638037c9937023 [2021-11-13 02:40:45,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:40:45,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:40:45,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:40:45,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:40:45,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:40:45,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:40:45" (1/1) ... [2021-11-13 02:40:45,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76100d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:45, skipping insertion in model container [2021-11-13 02:40:45,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:40:45" (1/1) ... [2021-11-13 02:40:45,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:40:45,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:40:48,053 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_da2fd90d-966d-4ec4-90ad-76347c34bfad/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-13 02:40:48,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:40:48,268 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:40:48,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:40:48,688 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_da2fd90d-966d-4ec4-90ad-76347c34bfad/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-13 02:40:48,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:40:48,728 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:40:49,384 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_da2fd90d-966d-4ec4-90ad-76347c34bfad/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-13 02:40:49,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:40:49,612 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:40:49,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49 WrapperNode [2021-11-13 02:40:49,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:40:49,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:40:49,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:40:49,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:40:49,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:49,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:50,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:40:50,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:40:50,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:40:50,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:40:50,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:50,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:50,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:50,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:50,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:50,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:50,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:50,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:40:50,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:40:50,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:40:50,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:40:50,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (1/1) ... [2021-11-13 02:40:50,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:40:50,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:40:50,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:40:50,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:40:50,523 INFO L130 BoogieDeclarations]: Found specification of procedure serial_proc_open [2021-11-13 02:40:50,524 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_proc_open [2021-11-13 02:40:50,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:40:50,524 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_throttle [2021-11-13 02:40:50,524 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_throttle [2021-11-13 02:40:50,524 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-13 02:40:50,525 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-13 02:40:50,525 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-13 02:40:50,525 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-13 02:40:50,525 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-13 02:40:50,525 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-13 02:40:50,525 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-13 02:40:50,526 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-13 02:40:50,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:40:50,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:40:50,526 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2021-11-13 02:40:50,526 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2021-11-13 02:40:50,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 02:40:50,527 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-13 02:40:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-13 02:40:50,527 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-13 02:40:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-13 02:40:50,527 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-13 02:40:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-13 02:40:50,528 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-13 02:40:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-13 02:40:50,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 02:40:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 02:40:50,528 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-13 02:40:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-13 02:40:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~C_INT [2021-11-13 02:40:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~C_INT [2021-11-13 02:40:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-13 02:40:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-13 02:40:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2021-11-13 02:40:50,530 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2021-11-13 02:40:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-13 02:40:50,530 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-13 02:40:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 02:40:50,530 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 02:40:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-13 02:40:50,531 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-13 02:40:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 02:40:50,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 02:40:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-13 02:40:50,532 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-13 02:40:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_UINT~X~C_UINT~TO~C_INT [2021-11-13 02:40:50,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_UINT~X~C_UINT~TO~C_INT [2021-11-13 02:40:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-13 02:40:50,532 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-13 02:40:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2021-11-13 02:40:50,533 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2021-11-13 02:40:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-13 02:40:50,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-13 02:40:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-13 02:40:50,533 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-13 02:40:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_get_by_index [2021-11-13 02:40:50,534 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_get_by_index [2021-11-13 02:40:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_poison_urbs [2021-11-13 02:40:50,534 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_poison_urbs [2021-11-13 02:40:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure serial_hangup [2021-11-13 02:40:50,535 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_hangup [2021-11-13 02:40:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-13 02:40:50,535 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-13 02:40:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-13 02:40:50,535 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-13 02:40:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2021-11-13 02:40:50,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2021-11-13 02:40:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-13 02:40:50,536 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-13 02:40:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2021-11-13 02:40:50,536 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2021-11-13 02:40:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 02:40:50,537 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 02:40:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:40:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-13 02:40:50,537 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-13 02:40:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-13 02:40:50,538 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-13 02:40:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unpoison_urb [2021-11-13 02:40:50,538 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unpoison_urb [2021-11-13 02:40:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2021-11-13 02:40:50,538 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2021-11-13 02:40:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-13 02:40:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-13 02:40:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-11-13 02:40:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-11-13 02:40:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value_probe [2021-11-13 02:40:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value_probe [2021-11-13 02:40:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:40:50,540 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-13 02:40:50,540 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-13 02:40:50,540 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-13 02:40:50,540 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-13 02:40:50,540 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-13 02:40:50,540 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 02:40:50,541 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 02:40:50,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:40:50,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:40:50,541 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2021-11-13 02:40:50,541 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2021-11-13 02:40:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 02:40:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:40:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:40:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:40:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 02:40:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:40:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 02:40:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 02:40:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure try_module_get [2021-11-13 02:40:50,543 INFO L138 BoogieDeclarations]: Found implementation of procedure try_module_get [2021-11-13 02:40:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-13 02:40:50,543 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-13 02:40:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-13 02:40:50,544 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-13 02:40:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-13 02:40:50,544 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-13 02:40:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 02:40:50,545 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 02:40:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_resume [2021-11-13 02:40:50,545 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_resume [2021-11-13 02:40:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-13 02:40:50,545 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-13 02:40:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 02:40:50,546 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 02:40:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 02:40:50,546 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 02:40:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-13 02:40:50,546 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-13 02:40:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_uint_must_check_helper [2021-11-13 02:40:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_uint_must_check_helper [2021-11-13 02:40:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-13 02:40:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-13 02:40:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-13 02:40:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-13 02:40:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-13 02:40:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-13 02:40:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-13 02:40:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-13 02:40:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-13 02:40:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-13 02:40:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-13 02:40:50,549 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-13 02:40:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-13 02:40:50,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-13 02:40:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure bus_unregister [2021-11-13 02:40:50,549 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_unregister [2021-11-13 02:40:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-13 02:40:50,550 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-13 02:40:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-13 02:40:50,550 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-13 02:40:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2021-11-13 02:40:50,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2021-11-13 02:40:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2021-11-13 02:40:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2021-11-13 02:40:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-13 02:40:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-13 02:40:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2021-11-13 02:40:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2021-11-13 02:40:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-13 02:40:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-13 02:40:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 02:40:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 02:40:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_match [2021-11-13 02:40:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_match [2021-11-13 02:40:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-13 02:40:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-13 02:40:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure serial_open [2021-11-13 02:40:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_open [2021-11-13 02:40:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-13 02:40:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-13 02:40:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 02:40:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 02:40:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-13 02:40:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-13 02:40:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-13 02:40:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-13 02:40:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 02:40:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 02:40:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-13 02:40:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-13 02:40:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-13 02:40:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 02:40:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 02:40:50,556 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-13 02:40:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-13 02:40:50,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 02:40:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 02:40:50,556 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-13 02:40:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-13 02:40:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2021-11-13 02:40:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2021-11-13 02:40:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2021-11-13 02:40:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2021-11-13 02:40:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:40:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure serial_install [2021-11-13 02:40:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_install [2021-11-13 02:40:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:40:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 02:40:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-13 02:40:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-13 02:40:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 02:40:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 02:40:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-13 02:40:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-13 02:40:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_table_lock [2021-11-13 02:40:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_table_lock [2021-11-13 02:40:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-13 02:40:50,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-13 02:40:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2021-11-13 02:40:50,560 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2021-11-13 02:40:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_table_lock [2021-11-13 02:40:50,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_table_lock [2021-11-13 02:40:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-13 02:40:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-13 02:40:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-13 02:40:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-13 02:40:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_unpoison_port_urbs [2021-11-13 02:40:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_unpoison_port_urbs [2021-11-13 02:40:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 02:40:50,562 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 02:40:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-13 02:40:50,562 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-13 02:40:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-13 02:40:50,562 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-13 02:40:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure get_iface_id [2021-11-13 02:40:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure get_iface_id [2021-11-13 02:40:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-13 02:40:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-13 02:40:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-13 02:40:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-13 02:40:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:40:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:40:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-13 02:40:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-13 02:40:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-11-13 02:40:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-11-13 02:42:17,291 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:42:17,291 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:42:17,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:42:17 BoogieIcfgContainer [2021-11-13 02:42:17,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:42:17,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:42:17,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:42:17,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:42:17,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:40:45" (1/3) ... [2021-11-13 02:42:17,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497c73e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:42:17, skipping insertion in model container [2021-11-13 02:42:17,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:49" (2/3) ... [2021-11-13 02:42:17,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497c73e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:42:17, skipping insertion in model container [2021-11-13 02:42:17,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:42:17" (3/3) ... [2021-11-13 02:42:17,307 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-13 02:42:17,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:42:17,313 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:42:17,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:42:17,382 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 [2021-11-13 02:42:17,382 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:42:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 1807 states, 1255 states have (on average 1.3107569721115537) internal successors, (1645), 1289 states have internal predecessors, (1645), 443 states have call successors, (443), 107 states have call predecessors, (443), 107 states have return successors, (443), 429 states have call predecessors, (443), 443 states have call successors, (443) [2021-11-13 02:42:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 02:42:17,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:17,448 INFO L514 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] [2021-11-13 02:42:17,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:17,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1141413109, now seen corresponding path program 1 times [2021-11-13 02:42:17,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:17,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606761283] [2021-11-13 02:42:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:17,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:17,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:17,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:17,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:42:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:32,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 2197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:42:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:33,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:33,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:33,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606761283] [2021-11-13 02:42:33,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606761283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:33,791 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:33,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:42:33,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390142797] [2021-11-13 02:42:33,794 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:33,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:42:33,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:42:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:42:33,833 INFO L87 Difference]: Start difference. First operand has 1807 states, 1255 states have (on average 1.3107569721115537) internal successors, (1645), 1289 states have internal predecessors, (1645), 443 states have call successors, (443), 107 states have call predecessors, (443), 107 states have return successors, (443), 429 states have call predecessors, (443), 443 states have call successors, (443) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:42:36,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:36,979 INFO L93 Difference]: Finished difference Result 5136 states and 7501 transitions. [2021-11-13 02:42:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:42:36,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2021-11-13 02:42:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:37,056 INFO L225 Difference]: With dead ends: 5136 [2021-11-13 02:42:37,057 INFO L226 Difference]: Without dead ends: 3332 [2021-11-13 02:42:37,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:42:37,099 INFO L933 BasicCegarLoop]: 3022 mSDtfsCounter, 2470 mSDsluCounter, 2206 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2569.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2470 SdHoareTripleChecker+Valid, 5228 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 59.25ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2700.17ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:37,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2470 Valid, 5228 Invalid, 14 Unknown, 0 Unchecked, 59.25ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2700.17ms Time] [2021-11-13 02:42:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-11-13 02:42:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 3327. [2021-11-13 02:42:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 2314 states have (on average 1.3072601555747623) internal successors, (3025), 2376 states have internal predecessors, (3025), 810 states have call successors, (810), 210 states have call predecessors, (810), 202 states have return successors, (865), 758 states have call predecessors, (865), 794 states have call successors, (865) [2021-11-13 02:42:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 4700 transitions. [2021-11-13 02:42:37,524 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 4700 transitions. Word has length 32 [2021-11-13 02:42:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:37,525 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 4700 transitions. [2021-11-13 02:42:37,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:42:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 4700 transitions. [2021-11-13 02:42:37,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 02:42:37,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:37,528 INFO L514 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] [2021-11-13 02:42:37,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:37,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:37,741 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1022097916, now seen corresponding path program 1 times [2021-11-13 02:42:37,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:37,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624649962] [2021-11-13 02:42:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:37,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:37,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:37,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:42:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2198 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:42:52,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:53,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:53,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:53,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624649962] [2021-11-13 02:42:53,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624649962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:53,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:53,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:42:53,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547402876] [2021-11-13 02:42:53,947 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:53,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:42:53,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:42:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:42:53,949 INFO L87 Difference]: Start difference. First operand 3327 states and 4700 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:42:56,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:56,647 INFO L93 Difference]: Finished difference Result 3329 states and 4701 transitions. [2021-11-13 02:42:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:42:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2021-11-13 02:42:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:56,681 INFO L225 Difference]: With dead ends: 3329 [2021-11-13 02:42:56,681 INFO L226 Difference]: Without dead ends: 3326 [2021-11-13 02:42:56,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:42:56,690 INFO L933 BasicCegarLoop]: 2511 mSDtfsCounter, 2482 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2446.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2482 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2548.21ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:56,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2482 Valid, 2513 Invalid, 2 Unknown, 0 Unchecked, 8.47ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2548.21ms Time] [2021-11-13 02:42:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-11-13 02:42:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 3326. [2021-11-13 02:42:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 2314 states have (on average 1.3068280034572168) internal successors, (3024), 2375 states have internal predecessors, (3024), 809 states have call successors, (809), 210 states have call predecessors, (809), 202 states have return successors, (865), 758 states have call predecessors, (865), 794 states have call successors, (865) [2021-11-13 02:42:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4698 transitions. [2021-11-13 02:42:56,921 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4698 transitions. Word has length 33 [2021-11-13 02:42:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:56,922 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 4698 transitions. [2021-11-13 02:42:56,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:42:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4698 transitions. [2021-11-13 02:42:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 02:42:56,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:56,924 INFO L514 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] [2021-11-13 02:42:56,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:57,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:57,141 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1618299096, now seen corresponding path program 1 times [2021-11-13 02:42:57,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:57,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402760388] [2021-11-13 02:42:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:57,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:57,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:57,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:57,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:43:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:11,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:43:11,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:43:12,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:43:13,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:43:13,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402760388] [2021-11-13 02:43:13,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402760388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:43:13,207 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:43:13,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:43:13,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704223390] [2021-11-13 02:43:13,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:43:13,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:43:13,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:43:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:43:13,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:43:13,209 INFO L87 Difference]: Start difference. First operand 3326 states and 4698 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:43:15,681 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:43:15,928 INFO L93 Difference]: Finished difference Result 3328 states and 4699 transitions. [2021-11-13 02:43:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:43:15,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 34 [2021-11-13 02:43:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:43:15,962 INFO L225 Difference]: With dead ends: 3328 [2021-11-13 02:43:15,962 INFO L226 Difference]: Without dead ends: 3325 [2021-11-13 02:43:15,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:43:15,973 INFO L933 BasicCegarLoop]: 2509 mSDtfsCounter, 2479 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2470.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2479 SdHoareTripleChecker+Valid, 2511 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2571.69ms IncrementalHoareTripleChecker+Time [2021-11-13 02:43:15,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2479 Valid, 2511 Invalid, 2 Unknown, 0 Unchecked, 7.42ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2571.69ms Time] [2021-11-13 02:43:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2021-11-13 02:43:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3325. [2021-11-13 02:43:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3325 states, 2314 states have (on average 1.3063958513396716) internal successors, (3023), 2374 states have internal predecessors, (3023), 808 states have call successors, (808), 210 states have call predecessors, (808), 202 states have return successors, (865), 758 states have call predecessors, (865), 794 states have call successors, (865) [2021-11-13 02:43:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 4696 transitions. [2021-11-13 02:43:16,198 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 4696 transitions. Word has length 34 [2021-11-13 02:43:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:43:16,199 INFO L470 AbstractCegarLoop]: Abstraction has 3325 states and 4696 transitions. [2021-11-13 02:43:16,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:43:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 4696 transitions. [2021-11-13 02:43:16,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 02:43:16,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:43:16,202 INFO L514 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] [2021-11-13 02:43:16,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:43:16,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:43:16,417 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:43:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:43:16,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1374295937, now seen corresponding path program 1 times [2021-11-13 02:43:16,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:43:16,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832355496] [2021-11-13 02:43:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:16,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:43:16,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:43:16,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:43:16,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:43:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 2200 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:43:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:43:31,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:43:32,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:43:32,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832355496] [2021-11-13 02:43:32,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832355496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:43:32,295 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:43:32,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:43:32,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130113481] [2021-11-13 02:43:32,296 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:43:32,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:43:32,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:43:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:43:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:43:32,298 INFO L87 Difference]: Start difference. First operand 3325 states and 4696 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:43:34,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:43:35,136 INFO L93 Difference]: Finished difference Result 3461 states and 4836 transitions. [2021-11-13 02:43:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:43:35,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 35 [2021-11-13 02:43:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:43:35,168 INFO L225 Difference]: With dead ends: 3461 [2021-11-13 02:43:35,168 INFO L226 Difference]: Without dead ends: 3442 [2021-11-13 02:43:35,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:43:35,172 INFO L933 BasicCegarLoop]: 2557 mSDtfsCounter, 2299 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2519.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 2811 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.11ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2651.64ms IncrementalHoareTripleChecker+Time [2021-11-13 02:43:35,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2299 Valid, 2811 Invalid, 7 Unknown, 0 Unchecked, 10.11ms Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2651.64ms Time] [2021-11-13 02:43:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2021-11-13 02:43:35,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 3438. [2021-11-13 02:43:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 2402 states have (on average 1.2997502081598669) internal successors, (3122), 2459 states have internal predecessors, (3122), 811 states have call successors, (811), 232 states have call predecessors, (811), 224 states have return successors, (871), 764 states have call predecessors, (871), 800 states have call successors, (871) [2021-11-13 02:43:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 4804 transitions. [2021-11-13 02:43:35,547 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 4804 transitions. Word has length 35 [2021-11-13 02:43:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:43:35,549 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 4804 transitions. [2021-11-13 02:43:35,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:43:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 4804 transitions. [2021-11-13 02:43:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 02:43:35,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:43:35,562 INFO L514 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, 1, 1, 1, 1, 1] [2021-11-13 02:43:35,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:43:35,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:43:35,777 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:43:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:43:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2074906896, now seen corresponding path program 1 times [2021-11-13 02:43:35,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:43:35,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086031799] [2021-11-13 02:43:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:35,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:43:35,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:43:35,787 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:43:35,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:43:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:50,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2261 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:43:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:43:51,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:43:51,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:43:51,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086031799] [2021-11-13 02:43:51,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086031799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:43:51,986 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:43:51,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:43:51,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233120283] [2021-11-13 02:43:51,987 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:43:51,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:43:51,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:43:51,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:43:51,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:43:51,988 INFO L87 Difference]: Start difference. First operand 3438 states and 4804 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:43:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:43:52,506 INFO L93 Difference]: Finished difference Result 6718 states and 9390 transitions. [2021-11-13 02:43:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:43:52,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 58 [2021-11-13 02:43:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:43:52,538 INFO L225 Difference]: With dead ends: 6718 [2021-11-13 02:43:52,539 INFO L226 Difference]: Without dead ends: 3438 [2021-11-13 02:43:52,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:43:52,563 INFO L933 BasicCegarLoop]: 2501 mSDtfsCounter, 1 mSDsluCounter, 9992 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12493 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.89ms IncrementalHoareTripleChecker+Time [2021-11-13 02:43:52,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 12493 Invalid, 15 Unknown, 0 Unchecked, 21.76ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 182.89ms Time] [2021-11-13 02:43:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2021-11-13 02:43:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 3438. [2021-11-13 02:43:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 2402 states have (on average 1.2993338884263115) internal successors, (3121), 2459 states have internal predecessors, (3121), 811 states have call successors, (811), 232 states have call predecessors, (811), 224 states have return successors, (871), 764 states have call predecessors, (871), 800 states have call successors, (871) [2021-11-13 02:43:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 4803 transitions. [2021-11-13 02:43:52,817 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 4803 transitions. Word has length 58 [2021-11-13 02:43:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:43:52,818 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 4803 transitions. [2021-11-13 02:43:52,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:43:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 4803 transitions. [2021-11-13 02:43:52,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 02:43:52,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:43:52,824 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:43:52,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:43:53,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:43:53,049 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:43:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:43:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash -329537929, now seen corresponding path program 1 times [2021-11-13 02:43:53,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:43:53,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569380070] [2021-11-13 02:43:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:53,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:43:53,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:43:53,057 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:43:53,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:44:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 2278 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:44:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:44:09,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:44:12,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:12,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569380070] [2021-11-13 02:44:12,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569380070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:12,147 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:12,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-13 02:44:12,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030019406] [2021-11-13 02:44:12,148 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:12,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:44:12,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:44:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:44:12,150 INFO L87 Difference]: Start difference. First operand 3438 states and 4803 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 12 states have internal predecessors, (65), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 02:44:16,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:44:19,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:44:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:19,727 INFO L93 Difference]: Finished difference Result 6891 states and 9630 transitions. [2021-11-13 02:44:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:44:19,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 12 states have internal predecessors, (65), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 67 [2021-11-13 02:44:19,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:19,761 INFO L225 Difference]: With dead ends: 6891 [2021-11-13 02:44:19,761 INFO L226 Difference]: Without dead ends: 3458 [2021-11-13 02:44:19,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:44:19,786 INFO L933 BasicCegarLoop]: 2497 mSDtfsCounter, 42 mSDsluCounter, 22428 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5289.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 24925 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.36ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5762.28ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:19,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 24925 Invalid, 67 Unknown, 0 Unchecked, 52.36ms Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 2 Unknown, 0 Unchecked, 5762.28ms Time] [2021-11-13 02:44:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3458 states. [2021-11-13 02:44:19,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 3450. [2021-11-13 02:44:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 2411 states have (on average 1.297801742015761) internal successors, (3129), 2468 states have internal predecessors, (3129), 811 states have call successors, (811), 235 states have call predecessors, (811), 227 states have return successors, (871), 764 states have call predecessors, (871), 800 states have call successors, (871) [2021-11-13 02:44:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 4811 transitions. [2021-11-13 02:44:20,028 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 4811 transitions. Word has length 67 [2021-11-13 02:44:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:20,028 INFO L470 AbstractCegarLoop]: Abstraction has 3450 states and 4811 transitions. [2021-11-13 02:44:20,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 12 states have internal predecessors, (65), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 02:44:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 4811 transitions. [2021-11-13 02:44:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 02:44:20,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:20,033 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:20,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:20,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:20,257 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:20,258 INFO L85 PathProgramCache]: Analyzing trace with hash -593527673, now seen corresponding path program 1 times [2021-11-13 02:44:20,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:20,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905109698] [2021-11-13 02:44:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:20,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:20,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:20,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:44:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:35,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 2293 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:44:35,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:44:36,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:44:36,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:36,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905109698] [2021-11-13 02:44:36,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905109698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:36,927 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:36,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:44:36,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113407115] [2021-11-13 02:44:36,928 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:36,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:44:36,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:36,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:44:36,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:44:36,929 INFO L87 Difference]: Start difference. First operand 3450 states and 4811 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:44:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:37,285 INFO L93 Difference]: Finished difference Result 6872 states and 9595 transitions. [2021-11-13 02:44:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:44:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 70 [2021-11-13 02:44:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:37,326 INFO L225 Difference]: With dead ends: 6872 [2021-11-13 02:44:37,327 INFO L226 Difference]: Without dead ends: 3453 [2021-11-13 02:44:37,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:44:37,350 INFO L933 BasicCegarLoop]: 2498 mSDtfsCounter, 2 mSDsluCounter, 4990 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7488 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.19ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:37,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7488 Invalid, 11 Unknown, 0 Unchecked, 13.76ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 153.19ms Time] [2021-11-13 02:44:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2021-11-13 02:44:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 3453. [2021-11-13 02:44:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 2414 states have (on average 1.2974316487158244) internal successors, (3132), 2471 states have internal predecessors, (3132), 811 states have call successors, (811), 235 states have call predecessors, (811), 227 states have return successors, (871), 764 states have call predecessors, (871), 800 states have call successors, (871) [2021-11-13 02:44:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 4814 transitions. [2021-11-13 02:44:37,601 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 4814 transitions. Word has length 70 [2021-11-13 02:44:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:37,602 INFO L470 AbstractCegarLoop]: Abstraction has 3453 states and 4814 transitions. [2021-11-13 02:44:37,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:44:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 4814 transitions. [2021-11-13 02:44:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:44:37,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:37,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:37,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:37,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:37,829 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:37,830 INFO L85 PathProgramCache]: Analyzing trace with hash -371066097, now seen corresponding path program 1 times [2021-11-13 02:44:37,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:37,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778282879] [2021-11-13 02:44:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:37,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:37,837 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:37,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:44:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 2303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:44:53,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:44:54,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:44:55,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:55,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778282879] [2021-11-13 02:44:55,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778282879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:44:55,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634572329] [2021-11-13 02:44:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:55,836 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:44:55,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:44:55,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:44:55,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 02:44:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 2303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:44:59,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:45:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:45:00,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:45:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:45:01,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634572329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:45:01,133 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:45:01,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-13 02:45:01,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672651299] [2021-11-13 02:45:01,134 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:45:01,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:45:01,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:45:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:45:01,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:45:01,135 INFO L87 Difference]: Start difference. First operand 3453 states and 4814 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:45:03,311 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:45:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:45:04,468 INFO L93 Difference]: Finished difference Result 6733 states and 9400 transitions. [2021-11-13 02:45:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:45:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 74 [2021-11-13 02:45:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:45:04,505 INFO L225 Difference]: With dead ends: 6733 [2021-11-13 02:45:04,505 INFO L226 Difference]: Without dead ends: 3437 [2021-11-13 02:45:04,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:45:04,528 INFO L933 BasicCegarLoop]: 2498 mSDtfsCounter, 4 mSDsluCounter, 7472 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2541.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9970 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.91ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2655.11ms IncrementalHoareTripleChecker+Time [2021-11-13 02:45:04,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 9970 Invalid, 21 Unknown, 0 Unchecked, 13.91ms Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2655.11ms Time] [2021-11-13 02:45:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-13 02:45:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3437. [2021-11-13 02:45:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 2405 states have (on average 1.2968814968814968) internal successors, (3119), 2460 states have internal predecessors, (3119), 807 states have call successors, (807), 232 states have call predecessors, (807), 224 states have return successors, (867), 760 states have call predecessors, (867), 796 states have call successors, (867) [2021-11-13 02:45:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 4793 transitions. [2021-11-13 02:45:04,740 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 4793 transitions. Word has length 74 [2021-11-13 02:45:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:45:04,741 INFO L470 AbstractCegarLoop]: Abstraction has 3437 states and 4793 transitions. [2021-11-13 02:45:04,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:45:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 4793 transitions. [2021-11-13 02:45:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-13 02:45:04,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:45:04,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:45:04,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:05,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:05,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:45:05,165 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:45:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:45:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1904028595, now seen corresponding path program 1 times [2021-11-13 02:45:05,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:45:05,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882464707] [2021-11-13 02:45:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:45:05,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:45:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:45:05,179 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:45:05,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:45:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:45:22,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 2476 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:45:22,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:45:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:45:23,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:45:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:45:25,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:45:25,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882464707] [2021-11-13 02:45:25,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882464707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:45:25,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1623630494] [2021-11-13 02:45:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:45:25,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:45:25,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:45:25,073 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:45:25,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 02:45:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:45:29,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 2476 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:45:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:45:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:45:31,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:45:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:45:34,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1623630494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:45:34,729 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:45:34,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-13 02:45:34,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526583447] [2021-11-13 02:45:34,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:45:34,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:45:34,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:45:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:45:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:45:34,732 INFO L87 Difference]: Start difference. First operand 3437 states and 4793 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 02:45:36,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:45:39,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:45:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:45:45,031 INFO L93 Difference]: Finished difference Result 6725 states and 9387 transitions. [2021-11-13 02:45:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:45:45,032 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 98 [2021-11-13 02:45:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:45:45,059 INFO L225 Difference]: With dead ends: 6725 [2021-11-13 02:45:45,059 INFO L226 Difference]: Without dead ends: 3437 [2021-11-13 02:45:45,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-11-13 02:45:45,082 INFO L933 BasicCegarLoop]: 2481 mSDtfsCounter, 13 mSDsluCounter, 22304 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7217.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24785 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.48ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7503.93ms IncrementalHoareTripleChecker+Time [2021-11-13 02:45:45,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24785 Invalid, 66 Unknown, 0 Unchecked, 37.48ms Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 2 Unknown, 0 Unchecked, 7503.93ms Time] [2021-11-13 02:45:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-13 02:45:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3437. [2021-11-13 02:45:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 2405 states have (on average 1.296049896049896) internal successors, (3117), 2460 states have internal predecessors, (3117), 807 states have call successors, (807), 232 states have call predecessors, (807), 224 states have return successors, (867), 760 states have call predecessors, (867), 796 states have call successors, (867) [2021-11-13 02:45:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 4791 transitions. [2021-11-13 02:45:45,319 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 4791 transitions. Word has length 98 [2021-11-13 02:45:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:45:45,320 INFO L470 AbstractCegarLoop]: Abstraction has 3437 states and 4791 transitions. [2021-11-13 02:45:45,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 02:45:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 4791 transitions. [2021-11-13 02:45:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 02:45:45,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:45:45,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:45:45,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:45,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:45,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:45:45,754 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:45:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:45:45,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1928665541, now seen corresponding path program 1 times [2021-11-13 02:45:45,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:45:45,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997739929] [2021-11-13 02:45:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:45:45,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:45:45,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:45:45,763 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:45:45,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:46:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:05,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 2524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:46:05,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:46:07,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:46:09,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:46:09,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997739929] [2021-11-13 02:46:09,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997739929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:46:09,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [319591035] [2021-11-13 02:46:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:09,370 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:46:09,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:46:09,371 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:46:09,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:46:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:14,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 2524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:46:14,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 02:46:15,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 02:46:15,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [319591035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:46:15,813 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:46:15,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:46:15,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213284971] [2021-11-13 02:46:15,813 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:46:15,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:46:15,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:46:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:46:15,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:46:15,815 INFO L87 Difference]: Start difference. First operand 3437 states and 4791 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:46:18,408 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:46:18,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:46:18,977 INFO L93 Difference]: Finished difference Result 6712 states and 9405 transitions. [2021-11-13 02:46:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:46:18,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 109 [2021-11-13 02:46:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:46:19,002 INFO L225 Difference]: With dead ends: 6712 [2021-11-13 02:46:19,002 INFO L226 Difference]: Without dead ends: 3434 [2021-11-13 02:46:19,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:46:19,024 INFO L933 BasicCegarLoop]: 3977 mSDtfsCounter, 2187 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2750.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2187 SdHoareTripleChecker+Valid, 6346 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2886.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:46:19,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2187 Valid, 6346 Invalid, 9 Unknown, 0 Unchecked, 19.49ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2886.87ms Time] [2021-11-13 02:46:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-11-13 02:46:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3429. [2021-11-13 02:46:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 2399 states have (on average 1.295122967903293) internal successors, (3107), 2455 states have internal predecessors, (3107), 805 states have call successors, (805), 231 states have call predecessors, (805), 224 states have return successors, (803), 758 states have call predecessors, (803), 784 states have call successors, (803) [2021-11-13 02:46:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 4715 transitions. [2021-11-13 02:46:19,271 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 4715 transitions. Word has length 109 [2021-11-13 02:46:19,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:46:19,273 INFO L470 AbstractCegarLoop]: Abstraction has 3429 states and 4715 transitions. [2021-11-13 02:46:19,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:46:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 4715 transitions. [2021-11-13 02:46:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 02:46:19,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:46:19,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:46:19,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:46:19,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-13 02:46:19,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:46:19,706 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:46:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:46:19,706 INFO L85 PathProgramCache]: Analyzing trace with hash 856694713, now seen corresponding path program 1 times [2021-11-13 02:46:19,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:46:19,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998895230] [2021-11-13 02:46:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:19,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:46:19,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:46:19,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:46:19,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:46:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:39,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 2555 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:46:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:46:41,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:46:43,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:46:43,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998895230] [2021-11-13 02:46:43,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998895230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:46:43,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1268960782] [2021-11-13 02:46:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:43,835 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:46:43,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:46:43,836 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:46:43,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 02:46:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 2555 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:46:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:46:53,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:47:05,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1268960782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:47:05,737 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:47:05,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 24 [2021-11-13 02:47:05,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448551605] [2021-11-13 02:47:05,738 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:47:05,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 02:47:05,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:47:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 02:47:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-13 02:47:05,740 INFO L87 Difference]: Start difference. First operand 3429 states and 4715 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 12 states have internal predecessors, (93), 2 states have call successors, (20), 2 states have call predecessors, (20), 8 states have return successors, (19), 8 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 02:47:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:47:09,037 INFO L93 Difference]: Finished difference Result 6837 states and 9430 transitions. [2021-11-13 02:47:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:47:09,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 12 states have internal predecessors, (93), 2 states have call successors, (20), 2 states have call predecessors, (20), 8 states have return successors, (19), 8 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-11-13 02:47:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:47:09,062 INFO L225 Difference]: With dead ends: 6837 [2021-11-13 02:47:09,062 INFO L226 Difference]: Without dead ends: 3451 [2021-11-13 02:47:09,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-11-13 02:47:09,083 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 2 mSDsluCounter, 27265 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2317.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29745 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2387.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:47:09,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 29745 Invalid, 59 Unknown, 0 Unchecked, 48.32ms Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 2387.68ms Time] [2021-11-13 02:47:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2021-11-13 02:47:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3438. [2021-11-13 02:47:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 2405 states have (on average 1.2943866943866944) internal successors, (3113), 2462 states have internal predecessors, (3113), 805 states have call successors, (805), 231 states have call predecessors, (805), 227 states have return successors, (818), 760 states have call predecessors, (818), 784 states have call successors, (818) [2021-11-13 02:47:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 4736 transitions. [2021-11-13 02:47:09,321 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 4736 transitions. Word has length 113 [2021-11-13 02:47:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:47:09,321 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 4736 transitions. [2021-11-13 02:47:09,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 12 states have internal predecessors, (93), 2 states have call successors, (20), 2 states have call predecessors, (20), 8 states have return successors, (19), 8 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 02:47:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 4736 transitions. [2021-11-13 02:47:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 02:47:09,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:47:09,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:47:09,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:09,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:09,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:47:09,751 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:47:09,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:47:09,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1501301561, now seen corresponding path program 1 times [2021-11-13 02:47:09,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:47:09,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802790482] [2021-11-13 02:47:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:09,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:47:09,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:47:09,762 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:47:09,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:47:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:29,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 2570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:47:29,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:47:32,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:47:33,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:47:33,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802790482] [2021-11-13 02:47:33,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802790482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:47:33,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901511654] [2021-11-13 02:47:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:33,912 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:47:33,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:47:33,913 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:47:33,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-13 02:47:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:47:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:47:45,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:47:46,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [901511654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:47:46,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394726986] [2021-11-13 02:47:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:46,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:47:46,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:47:46,621 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:47:46,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 02:47:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 2570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:47:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:47:51,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:47:53,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394726986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:47:53,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:47:53,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-13 02:47:53,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015688631] [2021-11-13 02:47:53,317 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:47:53,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:47:53,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:47:53,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:47:53,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:47:53,320 INFO L87 Difference]: Start difference. First operand 3438 states and 4736 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:47:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:47:54,804 INFO L93 Difference]: Finished difference Result 6850 states and 9449 transitions. [2021-11-13 02:47:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:47:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 116 [2021-11-13 02:47:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:47:54,827 INFO L225 Difference]: With dead ends: 6850 [2021-11-13 02:47:54,828 INFO L226 Difference]: Without dead ends: 3446 [2021-11-13 02:47:54,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:47:54,845 INFO L933 BasicCegarLoop]: 2481 mSDtfsCounter, 7 mSDsluCounter, 7434 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 692.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9915 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.07ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 711.58ms IncrementalHoareTripleChecker+Time [2021-11-13 02:47:54,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 9915 Invalid, 38 Unknown, 0 Unchecked, 14.07ms Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 711.58ms Time] [2021-11-13 02:47:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-11-13 02:47:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 3446. [2021-11-13 02:47:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 2413 states have (on average 1.293410692084542) internal successors, (3121), 2470 states have internal predecessors, (3121), 805 states have call successors, (805), 231 states have call predecessors, (805), 227 states have return successors, (818), 760 states have call predecessors, (818), 784 states have call successors, (818) [2021-11-13 02:47:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 4744 transitions. [2021-11-13 02:47:55,206 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 4744 transitions. Word has length 116 [2021-11-13 02:47:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:47:55,206 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 4744 transitions. [2021-11-13 02:47:55,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:47:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 4744 transitions. [2021-11-13 02:47:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 02:47:55,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:47:55,212 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:47:55,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:55,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-13 02:47:55,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-13 02:47:55,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:47:55,838 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:47:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:47:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash 726471127, now seen corresponding path program 2 times [2021-11-13 02:47:55,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:47:55,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148293455] [2021-11-13 02:47:55,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:47:55,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:47:55,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:47:55,849 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:47:55,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2fd90d-966d-4ec4-90ad-76347c34bfad/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process